TY  - CONF
AU  - Mitrović, Stefan
AU  - Vidović, Milica
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3482
AB  - In the last few decades, the technology of 3D concrete printing (3DCP) has had a significant
development. This technology has a great potential to improve efficiency in the construction
industry. It can provide safer site working conditions, material savings, a reduction of
construction time, and a high versatility of architectural and structural design. However, this new
technology is still not fully investigated. The wider application is limited by the lack of standards
and guidelines for design and production.
The literature review showed that, there are only a few studies investigating structural behaviour
of 3DCP structures and elements. Beams and walls with and without addition of fibers,
reinforcement or cables under ultimate loads were tested. The incorporation of reinforcement in
the printing process, connections between printed pieces and long-term behaviour of 3DCP
elements under sustained load are opened questions.
The topic of this research was an experimental testing of 3DCP truss girder. Printing of truss
girder was done using a commercial, ready-to-use premix Sikacrete® 751 3D. In order to print,
the printer head was moved in the Z direction to alternately place two desired path layers. A truss
girder with dimensions of 87x29x12 cm, without reinforcement, was subjected to a four-point
bending test up to failure. During this testing strains in two diagonals, deflection of the two
bottom joints, and ultimate force were measured. Ultimate force was 30 kN and the brittle failure
of tensioned bottom chord occurred. The force in tensioned diagonal was 13.45 kN and in the
compressed one 36.77 kN. Additionally, three samples obtained from the top and bottom chords
were tested on axial tension. The tension capacity of samples was 25.12 kN.
C3  - Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024
T1  - Experimental testing of 3D printed concrete truss girder
EP  - 523
SP  - 517
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3482
ER  - 

@conference{
author = "Mitrović, Stefan and Vidović, Milica and Ignjatović, Ivan and Dragaš, Jelena",
year = "2024",
abstract = "In the last few decades, the technology of 3D concrete printing (3DCP) has had a significant
development. This technology has a great potential to improve efficiency in the construction
industry. It can provide safer site working conditions, material savings, a reduction of
construction time, and a high versatility of architectural and structural design. However, this new
technology is still not fully investigated. The wider application is limited by the lack of standards
and guidelines for design and production.
The literature review showed that, there are only a few studies investigating structural behaviour
of 3DCP structures and elements. Beams and walls with and without addition of fibers,
reinforcement or cables under ultimate loads were tested. The incorporation of reinforcement in
the printing process, connections between printed pieces and long-term behaviour of 3DCP
elements under sustained load are opened questions.
The topic of this research was an experimental testing of 3DCP truss girder. Printing of truss
girder was done using a commercial, ready-to-use premix Sikacrete® 751 3D. In order to print,
the printer head was moved in the Z direction to alternately place two desired path layers. A truss
girder with dimensions of 87x29x12 cm, without reinforcement, was subjected to a four-point
bending test up to failure. During this testing strains in two diagonals, deflection of the two
bottom joints, and ultimate force were measured. Ultimate force was 30 kN and the brittle failure
of tensioned bottom chord occurred. The force in tensioned diagonal was 13.45 kN and in the
compressed one 36.77 kN. Additionally, three samples obtained from the top and bottom chords
were tested on axial tension. The tension capacity of samples was 25.12 kN.",
journal = "Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024",
title = "Experimental testing of 3D printed concrete truss girder",
pages = "523-517",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3482"
}

Mitrović, S., Vidović, M., Ignjatović, I.,& Dragaš, J.. (2024). Experimental testing of 3D printed concrete truss girder. in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024, 517-523.
https://hdl.handle.net/21.15107/rcub_grafar_3482

Mitrović S, Vidović M, Ignjatović I, Dragaš J. Experimental testing of 3D printed concrete truss girder. in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024. 2024;:517-523.
https://hdl.handle.net/21.15107/rcub_grafar_3482 .

Mitrović, Stefan, Vidović, Milica, Ignjatović, Ivan, Dragaš, Jelena, "Experimental testing of 3D printed concrete truss girder" in Proceedings of The 9th International Conference ''Civil Engineering Science & Practice'' GNP 2024, Kolašin, Montenegro, 5-9 March, 2024 (2024):517-523,
https://hdl.handle.net/21.15107/rcub_grafar_3482 .

TY  - JOUR
AU  - Luković, Mladena
AU  - Budnik, Bartosz
AU  - Dragaš, Jelena
AU  - Carević, Vedran
AU  - Ignjatović, Ivan
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3230
AB  - Strain Hardening Cementitious Composite (SHCC) is an innovative type of fibre-reinforced cement-based composite that has superior tensile properties. Because of this, it holds the potential to enhance the shear capacity of reinforced concrete (RC) beams, if applied properly. This paper presents the general and distinctive properties of SHCC as well as a literature review of topics related to the contribution of SHCC layers to the shear resistance of RC beams with and without shear reinforcement. Based on the analysed results, it is concluded that the main characteristics of SHCC are its microcracking behaviour, high ductility, and increased tensile strength (between 2 and 8 MPa) at large deformations. When used in structural elements, SHCC develops multiple parallel cracks compared to concentrated cracks in conventionally reinforced concrete. The biggest disadvantage of SHCC is its significant drying shrinkage. Although showing high variability, using SHCC as laminates with a thickness of 10 mm improves the shear capacity of hybrid RC beams, but debonding of interfaces in a hybrid system occurs in some cases.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK)
PB  - Univerzitet u Beogradu, Građevinski fakultet
PB  - Društvo građevinskih konstruktera Srbije
T2  - Building Materials and Structures
T1  - Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams
EP  - 155
IS  - 3
SP  - 145
VL  - 66
DO  - 10.5937/GRMK2300006L
ER  - 

@article{
author = "Luković, Mladena and Budnik, Bartosz and Dragaš, Jelena and Carević, Vedran and Ignjatović, Ivan",
year = "2023",
abstract = "Strain Hardening Cementitious Composite (SHCC) is an innovative type of fibre-reinforced cement-based composite that has superior tensile properties. Because of this, it holds the potential to enhance the shear capacity of reinforced concrete (RC) beams, if applied properly. This paper presents the general and distinctive properties of SHCC as well as a literature review of topics related to the contribution of SHCC layers to the shear resistance of RC beams with and without shear reinforcement. Based on the analysed results, it is concluded that the main characteristics of SHCC are its microcracking behaviour, high ductility, and increased tensile strength (between 2 and 8 MPa) at large deformations. When used in structural elements, SHCC develops multiple parallel cracks compared to concentrated cracks in conventionally reinforced concrete. The biggest disadvantage of SHCC is its significant drying shrinkage. Although showing high variability, using SHCC as laminates with a thickness of 10 mm improves the shear capacity of hybrid RC beams, but debonding of interfaces in a hybrid system occurs in some cases.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK), Univerzitet u Beogradu, Građevinski fakultet, Društvo građevinskih konstruktera Srbije",
journal = "Building Materials and Structures",
title = "Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams",
pages = "155-145",
number = "3",
volume = "66",
doi = "10.5937/GRMK2300006L"
}

Luković, M., Budnik, B., Dragaš, J., Carević, V.,& Ignjatović, I.. (2023). Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams. in Building Materials and Structures
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK)., 66(3), 145-155.
https://doi.org/10.5937/GRMK2300006L

Luković M, Budnik B, Dragaš J, Carević V, Ignjatović I. Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams. in Building Materials and Structures. 2023;66(3):145-155.
doi:10.5937/GRMK2300006L .

Luković, Mladena, Budnik, Bartosz, Dragaš, Jelena, Carević, Vedran, Ignjatović, Ivan, "Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams" in Building Materials and Structures, 66, no. 3 (2023):145-155,
https://doi.org/10.5937/GRMK2300006L . .

TY  - JOUR
AU  - Luković, Mladena
AU  - Budnik, Bartosz
AU  - Dragaš, Jelena
AU  - Carević, Vedran
AU  - Ignjatović, Ivan
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3160
AB  - Strain Hardening Cementitious Composite (SHCC) is an innovative type of fibrereinforced
cement-based composite that has superior tensile properties. Because 
of this, it holds the potential to enhance the shear capacity of reinforced concrete 
(RC) beams, if applied properly. This paper presents the general and distinctive 
properties of SHCC as well as a literature review of topics related to the contribution 
of SHCC layers to the shear resistance of RC beams with and without shear 
reinforcement. Based on the analysed results, it is concluded that the main 
characteristics of SHCC are its microcracking behaviour, high ductility, and 
increased tensile strength (between 2 and 8 MPa) at large deformations. When used 
in structural elements, SHCC develops multiple parallel cracks compared to 
concentrated cracks in conventionally reinforced concrete. The biggest 
disadvantage of SHCC is its significant drying shrinkage. Although showing high 
variability, using SHCC as laminates with a thickness of 10 mm improves the shear 
capacity of hybrid RC beams, but debonding of interfaces in a hybrid system occurrs 
in some cases.
PB  - Faculty of Civil Engineering, University of Belgrade
PB  - Society for Materials and Structures Testing of Serbia
PB  - Association of Structural Engineers of Serbia
T2  - Building materials and structures
T1  - Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams
IS  - Article 2300006L in press
VL  - 66
DO  - 10.5937/GRMK2300006L
ER  - 

@article{
author = "Luković, Mladena and Budnik, Bartosz and Dragaš, Jelena and Carević, Vedran and Ignjatović, Ivan",
year = "2023",
abstract = "Strain Hardening Cementitious Composite (SHCC) is an innovative type of fibrereinforced
cement-based composite that has superior tensile properties. Because 
of this, it holds the potential to enhance the shear capacity of reinforced concrete 
(RC) beams, if applied properly. This paper presents the general and distinctive 
properties of SHCC as well as a literature review of topics related to the contribution 
of SHCC layers to the shear resistance of RC beams with and without shear 
reinforcement. Based on the analysed results, it is concluded that the main 
characteristics of SHCC are its microcracking behaviour, high ductility, and 
increased tensile strength (between 2 and 8 MPa) at large deformations. When used 
in structural elements, SHCC develops multiple parallel cracks compared to 
concentrated cracks in conventionally reinforced concrete. The biggest 
disadvantage of SHCC is its significant drying shrinkage. Although showing high 
variability, using SHCC as laminates with a thickness of 10 mm improves the shear 
capacity of hybrid RC beams, but debonding of interfaces in a hybrid system occurrs 
in some cases.",
publisher = "Faculty of Civil Engineering, University of Belgrade, Society for Materials and Structures Testing of Serbia, Association of Structural Engineers of Serbia",
journal = "Building materials and structures",
title = "Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams",
number = "Article 2300006L in press",
volume = "66",
doi = "10.5937/GRMK2300006L"
}

Luković, M., Budnik, B., Dragaš, J., Carević, V.,& Ignjatović, I.. (2023). Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams. in Building materials and structures
Faculty of Civil Engineering, University of Belgrade., 66(Article 2300006L in press).
https://doi.org/10.5937/GRMK2300006L

Luković M, Budnik B, Dragaš J, Carević V, Ignjatović I. Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams. in Building materials and structures. 2023;66(Article 2300006L in press).
doi:10.5937/GRMK2300006L .

Luković, Mladena, Budnik, Bartosz, Dragaš, Jelena, Carević, Vedran, Ignjatović, Ivan, "Contribution of strain-hardening cementitious composites (SHCC) to shear resistance in hybrid reinforced concrete beams" in Building materials and structures, 66, no. Article 2300006L in press (2023),
https://doi.org/10.5937/GRMK2300006L . .

TY  - CONF
AU  - Milićević, Ivan
AU  - Vidović, Milica
AU  - Dragaš, Jelena
AU  - Milosavljević, Branko
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3220
AB  - The construction industry is one of the most important parts of economic development of society but it
also has a very negative impact on the environment. Using the three concepts of circular economy: reuse,
reduce and recycle, it is possible to decrease its negative impact. The steel-concrete composite structures
and prefabricated structures enable, environmentally beneficial, circular life-cycle of buildings. For
structural performance during the lifecycle, it is very important to have an adequate connection between
the steel and reinforced concrete members.
Different types of connectors have been widely used in composite structures. Demountable ones are
advantageous in terms of reuse. In the last few years, the innovative demountable steel-concrete bolted
connector with mechanical coupler has been proposed. There are two types of these bolted connectors
depending on the type anchorage i.e., with the rebar anchor or with the second bolt.
This paper gives an overview of previous research of bolted connectors with mechanical coupler
capacity under static load. Influence of key parameters on the shear behaviour of the connector was
observed: concrete compressive strength, connector dimensions and concrete edge distance. The shear
and tension resistances of individual parts of the commercially available connectors were determined
using recommendations of design codes and technical documentation. In case of the connector loaded
in tension, it was concluded that the resistance is governed by the resistance of the rebar anchor. In case
of the connector loaded in shear, design recommendations were also compared with the previous
experimental tests. It was concluded that the shear resistance highly depends on the connection layout
and concrete strength.
C3  - Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023.
T1  - Behaviour and design of bolted connectors with mechanical coupler: an overview
EP  - 680
SP  - 671
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3220
ER  - 

@conference{
author = "Milićević, Ivan and Vidović, Milica and Dragaš, Jelena and Milosavljević, Branko",
year = "2023",
abstract = "The construction industry is one of the most important parts of economic development of society but it
also has a very negative impact on the environment. Using the three concepts of circular economy: reuse,
reduce and recycle, it is possible to decrease its negative impact. The steel-concrete composite structures
and prefabricated structures enable, environmentally beneficial, circular life-cycle of buildings. For
structural performance during the lifecycle, it is very important to have an adequate connection between
the steel and reinforced concrete members.
Different types of connectors have been widely used in composite structures. Demountable ones are
advantageous in terms of reuse. In the last few years, the innovative demountable steel-concrete bolted
connector with mechanical coupler has been proposed. There are two types of these bolted connectors
depending on the type anchorage i.e., with the rebar anchor or with the second bolt.
This paper gives an overview of previous research of bolted connectors with mechanical coupler
capacity under static load. Influence of key parameters on the shear behaviour of the connector was
observed: concrete compressive strength, connector dimensions and concrete edge distance. The shear
and tension resistances of individual parts of the commercially available connectors were determined
using recommendations of design codes and technical documentation. In case of the connector loaded
in tension, it was concluded that the resistance is governed by the resistance of the rebar anchor. In case
of the connector loaded in shear, design recommendations were also compared with the previous
experimental tests. It was concluded that the shear resistance highly depends on the connection layout
and concrete strength.",
journal = "Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023.",
title = "Behaviour and design of bolted connectors with mechanical coupler: an overview",
pages = "680-671",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3220"
}

Milićević, I., Vidović, M., Dragaš, J.,& Milosavljević, B.. (2023). Behaviour and design of bolted connectors with mechanical coupler: an overview. in Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023., 671-680.
https://hdl.handle.net/21.15107/rcub_grafar_3220

Milićević I, Vidović M, Dragaš J, Milosavljević B. Behaviour and design of bolted connectors with mechanical coupler: an overview. in Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023.. 2023;:671-680.
https://hdl.handle.net/21.15107/rcub_grafar_3220 .

Milićević, Ivan, Vidović, Milica, Dragaš, Jelena, Milosavljević, Branko, "Behaviour and design of bolted connectors with mechanical coupler: an overview" in Proceedings of the 20th International Symposium of the Macedonian Association of Structural Engineers (MASE), Skopje, September 28-29, 2023. (2023):671-680,
https://hdl.handle.net/21.15107/rcub_grafar_3220 .

TY  - JOUR
AU  - Dragaš, Jelena
AU  - Marinković, Snežana
AU  - Ignjatović, Ivan
AU  - Tošić, Nikola
AU  - Koković, Veljko
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2927
AB  - Large number of studies analyzed physical and mechanical properties of high-volume fly ash concrete, but only a few discussed its structural behavior. Material properties are an important input parameter for structural analysis, but they are insufficient for reliable conclusions to be made. This study analyses flexural behavior of reinforced concrete beams made with 63% of low-calcium class F fly ash in total cementitious materials mass, using experimental method and analyzing current code predictions (EN 1992-1-1). The analysis was done by comparing beams made with two longitudinal reinforcement ratios, made with traditional cement concrete (OPC) and high-volume fly ash concrete (HVFAC), both corresponding to concrete class C30/37. Beams were tested in a four-point bending test measuring vertical displacement, crack development, concrete strains and longitudinal reinforcement strains. According to this research, the flexural performance of HVFAC beams is similar to flexural performance of corresponding OPC beams in terms of ultimate bending capacity. The significant difference was noticed regarding cracking extent that was higher in HVFAC beams. Available ultimate bending moments code predictions can be applied on HVFAC beams with similar precision and variation of results, like for OPC beams. However, this cannot be concluded for parameters depending on the cracking behaviour, like cracking moments or deflections. Results and analysis presented in this study indicate that HVFAC can be used in structural elements subjected dominantly to bending, like beams and slabs. More research regarding structural behavior of HVFAC using full-scale long-term tests is needed to develop larger database for reliability analysis.
T2  - Engineering Structures
T1  - Flexural behaviour and ultimate bending capacity of high-volume fly ash reinforced concrete beams
VL  - 277
DO  - 10.1016/j.engstruct.2022.115446
ER  - 

@article{
author = "Dragaš, Jelena and Marinković, Snežana and Ignjatović, Ivan and Tošić, Nikola and Koković, Veljko",
year = "2023",
abstract = "Large number of studies analyzed physical and mechanical properties of high-volume fly ash concrete, but only a few discussed its structural behavior. Material properties are an important input parameter for structural analysis, but they are insufficient for reliable conclusions to be made. This study analyses flexural behavior of reinforced concrete beams made with 63% of low-calcium class F fly ash in total cementitious materials mass, using experimental method and analyzing current code predictions (EN 1992-1-1). The analysis was done by comparing beams made with two longitudinal reinforcement ratios, made with traditional cement concrete (OPC) and high-volume fly ash concrete (HVFAC), both corresponding to concrete class C30/37. Beams were tested in a four-point bending test measuring vertical displacement, crack development, concrete strains and longitudinal reinforcement strains. According to this research, the flexural performance of HVFAC beams is similar to flexural performance of corresponding OPC beams in terms of ultimate bending capacity. The significant difference was noticed regarding cracking extent that was higher in HVFAC beams. Available ultimate bending moments code predictions can be applied on HVFAC beams with similar precision and variation of results, like for OPC beams. However, this cannot be concluded for parameters depending on the cracking behaviour, like cracking moments or deflections. Results and analysis presented in this study indicate that HVFAC can be used in structural elements subjected dominantly to bending, like beams and slabs. More research regarding structural behavior of HVFAC using full-scale long-term tests is needed to develop larger database for reliability analysis.",
journal = "Engineering Structures",
title = "Flexural behaviour and ultimate bending capacity of high-volume fly ash reinforced concrete beams",
volume = "277",
doi = "10.1016/j.engstruct.2022.115446"
}

Dragaš, J., Marinković, S., Ignjatović, I., Tošić, N.,& Koković, V.. (2023). Flexural behaviour and ultimate bending capacity of high-volume fly ash reinforced concrete beams. in Engineering Structures, 277.
https://doi.org/10.1016/j.engstruct.2022.115446

Dragaš J, Marinković S, Ignjatović I, Tošić N, Koković V. Flexural behaviour and ultimate bending capacity of high-volume fly ash reinforced concrete beams. in Engineering Structures. 2023;277.
doi:10.1016/j.engstruct.2022.115446 .

Dragaš, Jelena, Marinković, Snežana, Ignjatović, Ivan, Tošić, Nikola, Koković, Veljko, "Flexural behaviour and ultimate bending capacity of high-volume fly ash reinforced concrete beams" in Engineering Structures, 277 (2023),
https://doi.org/10.1016/j.engstruct.2022.115446 . .

TY  - CONF
AU  - Vidović, Milica
AU  - Dragaš, Jelena
AU  - Koković, Veljko
AU  - Zakić, Dimitrije
AU  - Tepavčević, Miroslav
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2901
AB  - The production of ultra-high performance concrete is one of the new ideas in modern construction, developed in the past few decades. A compressive strength higher than 150 MPa has been achieved using a relatively large amount of cement, approximately 800 kg/m3. As the cement industry is one of the largest producers of carbon dioxide, it is clear that the cement amount in concrete should be reduced to minimize greenhouse gases emission and slow down the global warming process. One possibility for that reduction is a replacement of cement with limestone filler.
This paper shows the results of experimental testing of five ultra-high-performance concrete mixtures. A referent mixture and four mixtures with a partial replacement of cement with limestone filler were made and tested. Two types of limestone fillers varying in particle size were used: one with a mean particle size of 2.5 μm and the other one with a mean particle size of 11 μm. Two groups of concrete mixtures were made with 20% and 30% of cement replaced by limestone. All other components: silica fume, quartz sand, water and superplasticizer were kept constant in all mixtures. Limestone filler is selected based on a particle size - so that its particles are the same size or smaller compared to cement. Basic fresh and hardened concrete properties were tested for all mixtures: consistency was determined using standard flow test and 28-day compressive strength was obtained by testing 10-cm cube samples.
Based on the obtained results, it could be concluded that the replacement of cement with limestone brought improvements in compressive strength and workability. The compressive strength of all mixtures was app. 120 MPa, while the mixtures with limestone were more flowable. The economic aspect was also considered. The analysis showed that up to 25% cost reduction can be achieved without compromising the compressive strength of this type of concrete by using limestone as a filler.
PB  - Macedonian Association of Structural Engineers
C3  - 19th International symposium
T1  - Physical and mechanical properties of Ultra-high- performance concrete with limestone
SP  - 807
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2901
ER  - 

@conference{
author = "Vidović, Milica and Dragaš, Jelena and Koković, Veljko and Zakić, Dimitrije and Tepavčević, Miroslav",
year = "2022",
abstract = "The production of ultra-high performance concrete is one of the new ideas in modern construction, developed in the past few decades. A compressive strength higher than 150 MPa has been achieved using a relatively large amount of cement, approximately 800 kg/m3. As the cement industry is one of the largest producers of carbon dioxide, it is clear that the cement amount in concrete should be reduced to minimize greenhouse gases emission and slow down the global warming process. One possibility for that reduction is a replacement of cement with limestone filler.
This paper shows the results of experimental testing of five ultra-high-performance concrete mixtures. A referent mixture and four mixtures with a partial replacement of cement with limestone filler were made and tested. Two types of limestone fillers varying in particle size were used: one with a mean particle size of 2.5 μm and the other one with a mean particle size of 11 μm. Two groups of concrete mixtures were made with 20% and 30% of cement replaced by limestone. All other components: silica fume, quartz sand, water and superplasticizer were kept constant in all mixtures. Limestone filler is selected based on a particle size - so that its particles are the same size or smaller compared to cement. Basic fresh and hardened concrete properties were tested for all mixtures: consistency was determined using standard flow test and 28-day compressive strength was obtained by testing 10-cm cube samples.
Based on the obtained results, it could be concluded that the replacement of cement with limestone brought improvements in compressive strength and workability. The compressive strength of all mixtures was app. 120 MPa, while the mixtures with limestone were more flowable. The economic aspect was also considered. The analysis showed that up to 25% cost reduction can be achieved without compromising the compressive strength of this type of concrete by using limestone as a filler.",
publisher = "Macedonian Association of Structural Engineers",
journal = "19th International symposium",
title = "Physical and mechanical properties of Ultra-high- performance concrete with limestone",
pages = "807",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2901"
}

Vidović, M., Dragaš, J., Koković, V., Zakić, D.,& Tepavčević, M.. (2022). Physical and mechanical properties of Ultra-high- performance concrete with limestone. in 19th International symposium
Macedonian Association of Structural Engineers., 807.
https://hdl.handle.net/21.15107/rcub_grafar_2901

Vidović M, Dragaš J, Koković V, Zakić D, Tepavčević M. Physical and mechanical properties of Ultra-high- performance concrete with limestone. in 19th International symposium. 2022;:807.
https://hdl.handle.net/21.15107/rcub_grafar_2901 .

Vidović, Milica, Dragaš, Jelena, Koković, Veljko, Zakić, Dimitrije, Tepavčević, Miroslav, "Physical and mechanical properties of Ultra-high- performance concrete with limestone" in 19th International symposium (2022):807,
https://hdl.handle.net/21.15107/rcub_grafar_2901 .

TY  - CONF
AU  - Mitrović, Stefan
AU  - Dragaš, Jelena
AU  - Carević, Vedran
AU  - Vidović, Milica
AU  - Ignjatović, Ivan
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2773
AB  - The aim of this paper is an experimental investigation of fresh concrete properties of the mixture designed for 3D printing. Different mixtures with and without chemical additions (superplasticizer and hydration controller) with variable water-binder factor were considered. Density, time setting and workability flow/slump tests were determined in the fresh state. Ultimate capacities for compressive and flexural strength were analysed on cube and prism specimens at different age. The effect of chemical additions on properties was shown in the conclusion of this paper. The mixture with the waterbinder ratio 0.45 and amount of 13.8% of hydration controller had obtained the optimal properties for 3D printing.
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK)
PB  - Udruženje savremene industrije glinenih proizvoda Srbije
C3  - XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija
T1  - Experimental investigation of basic concrete properties for 3D printing technology
EP  - 488
SP  - 479
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2773
ER  - 

@conference{
author = "Mitrović, Stefan and Dragaš, Jelena and Carević, Vedran and Vidović, Milica and Ignjatović, Ivan",
year = "2022",
abstract = "The aim of this paper is an experimental investigation of fresh concrete properties of the mixture designed for 3D printing. Different mixtures with and without chemical additions (superplasticizer and hydration controller) with variable water-binder factor were considered. Density, time setting and workability flow/slump tests were determined in the fresh state. Ultimate capacities for compressive and flexural strength were analysed on cube and prism specimens at different age. The effect of chemical additions on properties was shown in the conclusion of this paper. The mixture with the waterbinder ratio 0.45 and amount of 13.8% of hydration controller had obtained the optimal properties for 3D printing.",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK), Udruženje savremene industrije glinenih proizvoda Srbije",
journal = "XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija",
title = "Experimental investigation of basic concrete properties for 3D printing technology",
pages = "488-479",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2773"
}

Mitrović, S., Dragaš, J., Carević, V., Vidović, M.,& Ignjatović, I.. (2022). Experimental investigation of basic concrete properties for 3D printing technology. in XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije (DIMK)., 479-488.
https://hdl.handle.net/21.15107/rcub_grafar_2773

Mitrović S, Dragaš J, Carević V, Vidović M, Ignjatović I. Experimental investigation of basic concrete properties for 3D printing technology. in XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija. 2022;:479-488.
https://hdl.handle.net/21.15107/rcub_grafar_2773 .

Mitrović, Stefan, Dragaš, Jelena, Carević, Vedran, Vidović, Milica, Ignjatović, Ivan, "Experimental investigation of basic concrete properties for 3D printing technology" in XXVIII Kongres DIMK i IX Kongres SIGP sa Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija (2022):479-488,
https://hdl.handle.net/21.15107/rcub_grafar_2773 .

TY  - CONF
AU  - Ignjatović, Ivan
AU  - Mitrović, Stefan
AU  - Dragaš, Jelena
AU  - Carević, Vedran
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2723
AB  - 3D concrete printing technology enabled a new progress in industrialization, optimization and automatization of processes in contemporary construction works. This paper shows the commonly used methods of concrete 3D printing. Advantages, disadvantages and perspectives for further development of this technology are emphasized. Structural applications as an example of using this technology are shown. The analysis of existing knowledge about the influence of deterioration mechanisms on printed concrete was made. Evaluation of 3D concrete printing technology in terms of different aspect of sustainability has been done.
PB  - Association of Structural Engineers of Serbia
C3  - 16th International Congress Proceeding
T1  - Structural application of 3D concrete printing
EP  - 469
SP  - 458
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2723
ER  - 

@conference{
author = "Ignjatović, Ivan and Mitrović, Stefan and Dragaš, Jelena and Carević, Vedran",
year = "2022",
abstract = "3D concrete printing technology enabled a new progress in industrialization, optimization and automatization of processes in contemporary construction works. This paper shows the commonly used methods of concrete 3D printing. Advantages, disadvantages and perspectives for further development of this technology are emphasized. Structural applications as an example of using this technology are shown. The analysis of existing knowledge about the influence of deterioration mechanisms on printed concrete was made. Evaluation of 3D concrete printing technology in terms of different aspect of sustainability has been done.",
publisher = "Association of Structural Engineers of Serbia",
journal = "16th International Congress Proceeding",
title = "Structural application of 3D concrete printing",
pages = "469-458",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2723"
}

Ignjatović, I., Mitrović, S., Dragaš, J.,& Carević, V.. (2022). Structural application of 3D concrete printing. in 16th International Congress Proceeding
Association of Structural Engineers of Serbia., 458-469.
https://hdl.handle.net/21.15107/rcub_grafar_2723

Ignjatović I, Mitrović S, Dragaš J, Carević V. Structural application of 3D concrete printing. in 16th International Congress Proceeding. 2022;:458-469.
https://hdl.handle.net/21.15107/rcub_grafar_2723 .

Ignjatović, Ivan, Mitrović, Stefan, Dragaš, Jelena, Carević, Vedran, "Structural application of 3D concrete printing" in 16th International Congress Proceeding (2022):458-469,
https://hdl.handle.net/21.15107/rcub_grafar_2723 .

TY  - JOUR
AU  - Ildiko, Merta
AU  - Poletanović, Bojan
AU  - Dragaš, Jelena
AU  - Carević, Vedran
AU  - Ignjatović, Ivan
AU  - Komljenović, Miroslav
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2663
AB  - The physical and mechanical properties of hemp-fibre-reinforced alkali-activated (AA) mortars under accelerated carbonation were evaluated. Two matrices of different physical and chemical properties, i.e., a low Ca-containing and less dense one with fly ash (FA) and a high Ca-containing and denser one with FA and granulated blast furnace slag (GBFS), were reinforced with fibres (10 mm, 0.5 vol% and 1.0 vol%). Under accelerated carbonation, due to the pore refinement resulting from alkali and alkaline earth salt precipitation, AA hemp fibre mortars markedly (20%) decreased their water absorption. FA-based hemp mortars increased significantly their compressive and flexural strength (40% and 34%, respectively), whereas in the denser FA/GBFS matrix (due to the hindered CO2 penetration, i.e., lower chemical reaction between CO2 and pore solution and gel products), only a slight variation (±10%) occurred. Under accelerated carbonation, embrittlement of the fibre/matrix interface and of the whole composite occurred, accompanied by increased stiffness, decreased deformation capacity and loss of the energy absorption capacity under flexure. FA-based matrices exhibited more pronounced embrittlement than the denser FA/GBFS matrices. A combination of FA/GBFS-based mortar reinforced with 0.5 vol% fibre dosage ensured an optimal fibre/matrix interface and stress transfer, mitigating the embrittlement of the material under accelerated carbonation.
PB  - MDPI
T2  - Polymers
T1  - The Influence of Accelerated Carbonation on Physical and Mechanical Properties of Hemp-Fibre-Reinforced Alkali-Activated Fly Ash and Fly Ash/Slag Mortars
SP  - 1799
VL  - 14
DO  - 10.3390/polym14091799
ER  - 

@article{
author = "Ildiko, Merta and Poletanović, Bojan and Dragaš, Jelena and Carević, Vedran and Ignjatović, Ivan and Komljenović, Miroslav",
year = "2022",
abstract = "The physical and mechanical properties of hemp-fibre-reinforced alkali-activated (AA) mortars under accelerated carbonation were evaluated. Two matrices of different physical and chemical properties, i.e., a low Ca-containing and less dense one with fly ash (FA) and a high Ca-containing and denser one with FA and granulated blast furnace slag (GBFS), were reinforced with fibres (10 mm, 0.5 vol% and 1.0 vol%). Under accelerated carbonation, due to the pore refinement resulting from alkali and alkaline earth salt precipitation, AA hemp fibre mortars markedly (20%) decreased their water absorption. FA-based hemp mortars increased significantly their compressive and flexural strength (40% and 34%, respectively), whereas in the denser FA/GBFS matrix (due to the hindered CO2 penetration, i.e., lower chemical reaction between CO2 and pore solution and gel products), only a slight variation (±10%) occurred. Under accelerated carbonation, embrittlement of the fibre/matrix interface and of the whole composite occurred, accompanied by increased stiffness, decreased deformation capacity and loss of the energy absorption capacity under flexure. FA-based matrices exhibited more pronounced embrittlement than the denser FA/GBFS matrices. A combination of FA/GBFS-based mortar reinforced with 0.5 vol% fibre dosage ensured an optimal fibre/matrix interface and stress transfer, mitigating the embrittlement of the material under accelerated carbonation.",
publisher = "MDPI",
journal = "Polymers",
title = "The Influence of Accelerated Carbonation on Physical and Mechanical Properties of Hemp-Fibre-Reinforced Alkali-Activated Fly Ash and Fly Ash/Slag Mortars",
pages = "1799",
volume = "14",
doi = "10.3390/polym14091799"
}

Ildiko, M., Poletanović, B., Dragaš, J., Carević, V., Ignjatović, I.,& Komljenović, M.. (2022). The Influence of Accelerated Carbonation on Physical and Mechanical Properties of Hemp-Fibre-Reinforced Alkali-Activated Fly Ash and Fly Ash/Slag Mortars. in Polymers
MDPI., 14, 1799.
https://doi.org/10.3390/polym14091799

Ildiko M, Poletanović B, Dragaš J, Carević V, Ignjatović I, Komljenović M. The Influence of Accelerated Carbonation on Physical and Mechanical Properties of Hemp-Fibre-Reinforced Alkali-Activated Fly Ash and Fly Ash/Slag Mortars. in Polymers. 2022;14:1799.
doi:10.3390/polym14091799 .

Ildiko, Merta, Poletanović, Bojan, Dragaš, Jelena, Carević, Vedran, Ignjatović, Ivan, Komljenović, Miroslav, "The Influence of Accelerated Carbonation on Physical and Mechanical Properties of Hemp-Fibre-Reinforced Alkali-Activated Fly Ash and Fly Ash/Slag Mortars" in Polymers, 14 (2022):1799,
https://doi.org/10.3390/polym14091799 . .

TY  - CONF
AU  - Tošić, Nikola
AU  - Pecić, Nenad
AU  - Marí, Antonio
AU  - Torres, Lluis
AU  - Dragaš, Jelena
AU  - Poliotti, Mauro
PY  - 2021-06-14
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3193
AB  - Deflection control of two-way slabs is a very complex task considering their possible geometries, structural systems, reinforcement layouts and loading histories, as well as the large number of influencing parameters and moment redistribution due to cracking and time-dependent effects of creep and shrinkage. As a consequence, sufficiently simple and accurate methods for deflection control of two-way reinforced concrete slabs have are still missing. In order to fill this gap, a novel method was developed as an adaptation of the ζ-method (as defined by the fib Model Code 2010) of interpolating deflections between the uncracked and fully cracked state. The method is based on deflections obtained using linear-elastic analyses in finite element software, which are then transformed through a series of stiffness normalizations to obtain time-dependent deflections due to load and shrinkage. Furthermore, the moment redistribution capacity of two-way slabs is accounted for through adjustments of the interpolation coefficient ζ. The method is tested against available experimental results from literature and compared with results obtained using existing methods such as the crossing beam method. The results show good precision and accuracy of the proposed method and an improvement compared with existing methods.
C3  - fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings"
T1  - Development and assessment of a modified ζ-method for deflection control of two-way slabs
EP  - 1557
SP  - 1549
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3193
ER  - 

@conference{
author = "Tošić, Nikola and Pecić, Nenad and Marí, Antonio and Torres, Lluis and Dragaš, Jelena and Poliotti, Mauro",
year = "2021-06-14",
abstract = "Deflection control of two-way slabs is a very complex task considering their possible geometries, structural systems, reinforcement layouts and loading histories, as well as the large number of influencing parameters and moment redistribution due to cracking and time-dependent effects of creep and shrinkage. As a consequence, sufficiently simple and accurate methods for deflection control of two-way reinforced concrete slabs have are still missing. In order to fill this gap, a novel method was developed as an adaptation of the ζ-method (as defined by the fib Model Code 2010) of interpolating deflections between the uncracked and fully cracked state. The method is based on deflections obtained using linear-elastic analyses in finite element software, which are then transformed through a series of stiffness normalizations to obtain time-dependent deflections due to load and shrinkage. Furthermore, the moment redistribution capacity of two-way slabs is accounted for through adjustments of the interpolation coefficient ζ. The method is tested against available experimental results from literature and compared with results obtained using existing methods such as the crossing beam method. The results show good precision and accuracy of the proposed method and an improvement compared with existing methods.",
journal = "fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings"",
title = "Development and assessment of a modified ζ-method for deflection control of two-way slabs",
pages = "1557-1549",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3193"
}

Tošić, N., Pecić, N., Marí, A., Torres, L., Dragaš, J.,& Poliotti, M.. (2021-06-14). Development and assessment of a modified ζ-method for deflection control of two-way slabs. in fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings", 1549-1557.
https://hdl.handle.net/21.15107/rcub_grafar_3193

Tošić N, Pecić N, Marí A, Torres L, Dragaš J, Poliotti M. Development and assessment of a modified ζ-method for deflection control of two-way slabs. in fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings". 2021;:1549-1557.
https://hdl.handle.net/21.15107/rcub_grafar_3193 .

Tošić, Nikola, Pecić, Nenad, Marí, Antonio, Torres, Lluis, Dragaš, Jelena, Poliotti, Mauro, "Development and assessment of a modified ζ-method for deflection control of two-way slabs" in fib Symposium. "Concrete Structure: New Trends for Eco-Efficiency and Performance: 18th fib Symposium proceedings" (2021-06-14):1549-1557,
https://hdl.handle.net/21.15107/rcub_grafar_3193 .

TY  - CONF
AU  - Marinković, Snežana
AU  - Ignjatović, Ivan
AU  - Tošić, Nikola
AU  - Dragaš, Jelena
AU  - Carević, Vedran
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2436
AB  - During the last decade, a comprehensive experimental and numerical research on various sustainable concrete options for application in concrete structures was performed at the Faculty of Civil Engineering, University of Belgrade. Several types of green concrete mix designs were investigated: recycled aggregate concrete (RAC), high-volume fly ash concrete (HVFAC), alkali activated fly ash concrete (AAFAC) as well as their combinations. Numerous tests on material physical, mechanical and durability related properties were conducted as well as sustainability assessments of the structural use of such concretes. Structural behavior under short and long-term loading was investigated on full-scale reinforced concrete beams and recommendations for the design of structural members including strength, serviceability and durability were proposed. The work carried out by the group formed a significant part of the basis for RAC provisions in the new Eurocode 2-revision and the fib Model Code 2020.
PB  - Departman za građevinarstvo i geodeziju, Fakultet tehničkih nauka, Novi Sad
C3  - 15th international scientific conference INDIS, planning, design, construction and building renewal
T1  - Sustainable solutions for structural concrete – research conducted by Belgrade’s concrete structures research group over the last decade
EP  - 31
SP  - 2
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2436
ER  - 

@conference{
author = "Marinković, Snežana and Ignjatović, Ivan and Tošić, Nikola and Dragaš, Jelena and Carević, Vedran",
year = "2021",
abstract = "During the last decade, a comprehensive experimental and numerical research on various sustainable concrete options for application in concrete structures was performed at the Faculty of Civil Engineering, University of Belgrade. Several types of green concrete mix designs were investigated: recycled aggregate concrete (RAC), high-volume fly ash concrete (HVFAC), alkali activated fly ash concrete (AAFAC) as well as their combinations. Numerous tests on material physical, mechanical and durability related properties were conducted as well as sustainability assessments of the structural use of such concretes. Structural behavior under short and long-term loading was investigated on full-scale reinforced concrete beams and recommendations for the design of structural members including strength, serviceability and durability were proposed. The work carried out by the group formed a significant part of the basis for RAC provisions in the new Eurocode 2-revision and the fib Model Code 2020.",
publisher = "Departman za građevinarstvo i geodeziju, Fakultet tehničkih nauka, Novi Sad",
journal = "15th international scientific conference INDIS, planning, design, construction and building renewal",
title = "Sustainable solutions for structural concrete – research conducted by Belgrade’s concrete structures research group over the last decade",
pages = "31-2",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2436"
}

Marinković, S., Ignjatović, I., Tošić, N., Dragaš, J.,& Carević, V.. (2021). Sustainable solutions for structural concrete – research conducted by Belgrade’s concrete structures research group over the last decade. in 15th international scientific conference INDIS, planning, design, construction and building renewal
Departman za građevinarstvo i geodeziju, Fakultet tehničkih nauka, Novi Sad., 2-31.
https://hdl.handle.net/21.15107/rcub_grafar_2436

Marinković S, Ignjatović I, Tošić N, Dragaš J, Carević V. Sustainable solutions for structural concrete – research conducted by Belgrade’s concrete structures research group over the last decade. in 15th international scientific conference INDIS, planning, design, construction and building renewal. 2021;:2-31.
https://hdl.handle.net/21.15107/rcub_grafar_2436 .

Marinković, Snežana, Ignjatović, Ivan, Tošić, Nikola, Dragaš, Jelena, Carević, Vedran, "Sustainable solutions for structural concrete – research conducted by Belgrade’s concrete structures research group over the last decade" in 15th international scientific conference INDIS, planning, design, construction and building renewal (2021):2-31,
https://hdl.handle.net/21.15107/rcub_grafar_2436 .

TY  - JOUR
AU  - Tošić, Nikola
AU  - Pecić, Nenad
AU  - Poliotti, Mauro
AU  - Marí, Antonio
AU  - Torres, Lluis
AU  - Dragaš, Jelena
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2964
AB  - Deflections are among the most complex aspects of reinforced concrete behavior.
Furthermore, deflection control is increasingly a governing criterion in
design, especially in the case of two-way members such as flat slabs or edgesupported
slabs. However, simple and theoretically sound and adequately verified
methods for calculating deflections of two-way reinforced concrete members
have been lacking. Therefore, in this study, a novel method is proposed
for deflection control of two-way slabs. The method is an extension of the
ζ-method (as defined by Eurocode 2 and the fib Model Code 2010) of interpolating
deflections between the uncracked and fully cracked state. As a basis,
the method uses elastic deflections that are obtained through linear elastic
analyses in finite element software. The elastic deflection is then adequately
transformed based on the properties of a representative section, to account for
cracking, shrinkage and creep according to a modified version of the ζ-method.
Finally, the method is validated against available experimental results from literature,
obtaining satisfactory precision and accuracy. The method proposed
in this study aims at providing an easy-to-use tool for designers carrying out
deflection control of two-way reinforced concrete slabs.
PB  - wileyonlinelibrary.com
PB  - fib. International Federation for Structural Concrete
T2  - Structural Concrete
T1  - Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis
IS  - 1-19
DO  - 10.1002/suco.202000558
ER  - 

@article{
author = "Tošić, Nikola and Pecić, Nenad and Poliotti, Mauro and Marí, Antonio and Torres, Lluis and Dragaš, Jelena",
year = "2021",
abstract = "Deflections are among the most complex aspects of reinforced concrete behavior.
Furthermore, deflection control is increasingly a governing criterion in
design, especially in the case of two-way members such as flat slabs or edgesupported
slabs. However, simple and theoretically sound and adequately verified
methods for calculating deflections of two-way reinforced concrete members
have been lacking. Therefore, in this study, a novel method is proposed
for deflection control of two-way slabs. The method is an extension of the
ζ-method (as defined by Eurocode 2 and the fib Model Code 2010) of interpolating
deflections between the uncracked and fully cracked state. As a basis,
the method uses elastic deflections that are obtained through linear elastic
analyses in finite element software. The elastic deflection is then adequately
transformed based on the properties of a representative section, to account for
cracking, shrinkage and creep according to a modified version of the ζ-method.
Finally, the method is validated against available experimental results from literature,
obtaining satisfactory precision and accuracy. The method proposed
in this study aims at providing an easy-to-use tool for designers carrying out
deflection control of two-way reinforced concrete slabs.",
publisher = "wileyonlinelibrary.com, fib. International Federation for Structural Concrete",
journal = "Structural Concrete",
title = "Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis",
number = "1-19",
doi = "10.1002/suco.202000558"
}

Tošić, N., Pecić, N., Poliotti, M., Marí, A., Torres, L.,& Dragaš, J.. (2021). Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis. in Structural Concrete
wileyonlinelibrary.com.(1-19).
https://doi.org/10.1002/suco.202000558

Tošić N, Pecić N, Poliotti M, Marí A, Torres L, Dragaš J. Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis. in Structural Concrete. 2021;(1-19).
doi:10.1002/suco.202000558 .

Tošić, Nikola, Pecić, Nenad, Poliotti, Mauro, Marí, Antonio, Torres, Lluis, Dragaš, Jelena, "Extension of the ζ-method for calculating deflections of two-way slabs based on linear elastic finite element analysis" in Structural Concrete, no. 1-19 (2021),
https://doi.org/10.1002/suco.202000558 . .

TY  - GEN
AU  - Маринковић, Снежана
AU  - Savić, Aleksandar R.
AU  - Тешић, Ксенија
AU  - Драгаш, Јелена
AU  - Игњатовић, Иван
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3217
T1  - Технолошки поступак производње бетона са високим садржајем филера за примену у конструкцијама
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3217
ER  - 

@misc{
author = "Маринковић, Снежана and Savić, Aleksandar R. and Тешић, Ксенија and Драгаш, Јелена and Игњатовић, Иван",
year = "2020",
title = "Технолошки поступак производње бетона са високим садржајем филера за примену у конструкцијама",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3217"
}

Маринковић, С., Savić, A. R., Тешић, К., Драгаш, Ј.,& Игњатовић, И.. (2020). Технолошки поступак производње бетона са високим садржајем филера за примену у конструкцијама. .
https://hdl.handle.net/21.15107/rcub_grafar_3217

Маринковић С, Savić AR, Тешић К, Драгаш Ј, Игњатовић И. Технолошки поступак производње бетона са високим садржајем филера за примену у конструкцијама. 2020;.
https://hdl.handle.net/21.15107/rcub_grafar_3217 .

Маринковић, Снежана, Savić, Aleksandar R., Тешић, Ксенија, Драгаш, Јелена, Игњатовић, Иван, "Технолошки поступак производње бетона са високим садржајем филера за примену у конструкцијама" (2020),
https://hdl.handle.net/21.15107/rcub_grafar_3217 .

TY  - CONF
AU  - Carević, Vedran
AU  - Dragaš, Jelena
AU  - Radević, Aleksandar
AU  - Jevtić, Dragica
AU  - Zakić, Dimitrije
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2087
AB  - This research was conducted in order to evaluate the influence of different curing conditions on rheological and mechanical properties of high volume fly ash concrete (HVFAC) in comparison with the ordinary Portland cement concrete (OPC). Four types of concrete were made: two HVFAC and two OPC designed to have the same consistency and 28-day compressive strength for samples cured in water. Also, three different curing regimes were chosen: standard water curing (W), standard laboratory air curing (L) and curing in standard laboratory conditions using curing compound based on the polyolefin emulsion (C). The main objectives were to evaluate the influence of these curing regimes on the compressive strength, flexural tensile strength, modulus of elasticity development over time, water permeability of concrete and concrete shrinkage. The use of curing compound improved previously mentioned properties in some extent compared with the samples cured in standard air conditions.
PB  - University of Banja Luka
C3  - Proceedings of international conference on contemporary theory and practice in construction XIV
T1  - The influence of different curing conditions on hvfac rheological and mechanical properties
EP  - 31
SP  - 20
DO  - 10.7251/STP2014020C
ER  - 

@conference{
author = "Carević, Vedran and Dragaš, Jelena and Radević, Aleksandar and Jevtić, Dragica and Zakić, Dimitrije",
year = "2020",
abstract = "This research was conducted in order to evaluate the influence of different curing conditions on rheological and mechanical properties of high volume fly ash concrete (HVFAC) in comparison with the ordinary Portland cement concrete (OPC). Four types of concrete were made: two HVFAC and two OPC designed to have the same consistency and 28-day compressive strength for samples cured in water. Also, three different curing regimes were chosen: standard water curing (W), standard laboratory air curing (L) and curing in standard laboratory conditions using curing compound based on the polyolefin emulsion (C). The main objectives were to evaluate the influence of these curing regimes on the compressive strength, flexural tensile strength, modulus of elasticity development over time, water permeability of concrete and concrete shrinkage. The use of curing compound improved previously mentioned properties in some extent compared with the samples cured in standard air conditions.",
publisher = "University of Banja Luka",
journal = "Proceedings of international conference on contemporary theory and practice in construction XIV",
title = "The influence of different curing conditions on hvfac rheological and mechanical properties",
pages = "31-20",
doi = "10.7251/STP2014020C"
}

Carević, V., Dragaš, J., Radević, A., Jevtić, D.,& Zakić, D.. (2020). The influence of different curing conditions on hvfac rheological and mechanical properties. in Proceedings of international conference on contemporary theory and practice in construction XIV
University of Banja Luka., 20-31.
https://doi.org/10.7251/STP2014020C

Carević V, Dragaš J, Radević A, Jevtić D, Zakić D. The influence of different curing conditions on hvfac rheological and mechanical properties. in Proceedings of international conference on contemporary theory and practice in construction XIV. 2020;:20-31.
doi:10.7251/STP2014020C .

Carević, Vedran, Dragaš, Jelena, Radević, Aleksandar, Jevtić, Dragica, Zakić, Dimitrije, "The influence of different curing conditions on hvfac rheological and mechanical properties" in Proceedings of international conference on contemporary theory and practice in construction XIV (2020):20-31,
https://doi.org/10.7251/STP2014020C . .

TY  - GEN
AU  - Драгаш, Јелена
AU  - Маринковић, Снежана
AU  - Игњатовић, Иван
AU  - Царевић, Ведран
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3218
T1  - Технолошки поступак производње зелених бетона са високим садржајем летећег пепела за примену у армиранобетонским конструкцијама
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3218
ER  - 

@misc{
author = "Драгаш, Јелена and Маринковић, Снежана and Игњатовић, Иван and Царевић, Ведран",
year = "2020",
title = "Технолошки поступак производње зелених бетона са високим садржајем летећег пепела за примену у армиранобетонским конструкцијама",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3218"
}

Драгаш, Ј., Маринковић, С., Игњатовић, И.,& Царевић, В.. (2020). Технолошки поступак производње зелених бетона са високим садржајем летећег пепела за примену у армиранобетонским конструкцијама. .
https://hdl.handle.net/21.15107/rcub_grafar_3218

Драгаш Ј, Маринковић С, Игњатовић И, Царевић В. Технолошки поступак производње зелених бетона са високим садржајем летећег пепела за примену у армиранобетонским конструкцијама. 2020;.
https://hdl.handle.net/21.15107/rcub_grafar_3218 .

Драгаш, Јелена, Маринковић, Снежана, Игњатовић, Иван, Царевић, Ведран, "Технолошки поступак производње зелених бетона са високим садржајем летећег пепела за примену у армиранобетонским конструкцијама" (2020),
https://hdl.handle.net/21.15107/rcub_grafar_3218 .

TY  - GEN
AU  - Игњатовић, Иван
AU  - Маринковић, Снежана
AU  - Тошић, Никола
AU  - Драгаш, Јелена
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3216
T1  - Армиранобетонски конструкцијски елементи од зелених бетона на бази агрегата од рециклираног бетонског отпада: технологија производње бетона и усаглашавање са стандардима за конструкције
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3216
ER  - 

@misc{
author = "Игњатовић, Иван and Маринковић, Снежана and Тошић, Никола and Драгаш, Јелена",
year = "2020",
title = "Армиранобетонски конструкцијски елементи од зелених бетона на бази агрегата од рециклираног бетонског отпада: технологија производње бетона и усаглашавање са стандардима за конструкције",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3216"
}

Игњатовић, И., Маринковић, С., Тошић, Н.,& Драгаш, Ј.. (2020). Армиранобетонски конструкцијски елементи од зелених бетона на бази агрегата од рециклираног бетонског отпада: технологија производње бетона и усаглашавање са стандардима за конструкције. .
https://hdl.handle.net/21.15107/rcub_grafar_3216

Игњатовић И, Маринковић С, Тошић Н, Драгаш Ј. Армиранобетонски конструкцијски елементи од зелених бетона на бази агрегата од рециклираног бетонског отпада: технологија производње бетона и усаглашавање са стандардима за конструкције. 2020;.
https://hdl.handle.net/21.15107/rcub_grafar_3216 .

Игњатовић, Иван, Маринковић, Снежана, Тошић, Никола, Драгаш, Јелена, "Армиранобетонски конструкцијски елементи од зелених бетона на бази агрегата од рециклираног бетонског отпада: технологија производње бетона и усаглашавање са стандардима за конструкције" (2020),
https://hdl.handle.net/21.15107/rcub_grafar_3216 .

TY  - JOUR
AU  - Marinković, Snežana
AU  - Carević, Vedran
AU  - Dragaš, Jelena
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2232
AB  - In comparative Life Cycle Assessment (LCA) of concrete structures it is of crucial importance to provide the functional equivalence of compared alternatives. Most commonly, the comparison is performed between the structures made of conventional and green concrete mixtures. Since they have different mechanical and durability properties, corresponding structures have different strength and service life. While resolving this problem, two approaches are generally possible: either correction of the functional unit volume or correction of the calculated environmental impacts with compressive strength and duration of service life, if functional unit has the same volume. In this work, in order to assess the effect of service life modeling in LCA, both approaches were tested. As a demonstration, comparison of both slabs and beams made of conventional and high volume fly ash concrete exposed to carbonation was carried out. LCA was performed for 94 different mixtures from reported experimental research and calculated environmental impacts (climate change, acidification, eutrophication, photochemical-oxidant creation, and abiotic depletion of fossil fuels) for both approaches were compared. Results showed that different modeling of service life in LCA can result in totally different, even opposite conclusions. With slightly larger volume of functional unit (7%–20%), all normalized environmental impacts of high volume fly ash concrete structural members were lower for an order of magnitude (6–7 times) compared to those obtained on the basis of the same volume approach. Therefore, drawing conclusions only on the basis of service life modeling with the same volume approach may be misleading. The proper choice of the best alternative should be based on the integrated assessment which includes structural, environmental and cost assessment of the structure as a whole.
PB  - Elsevier Ltd
T2  - Journal of Cleaner Production
T1  - The role of service life in Life Cycle Assessment of concrete structures
SP  - 125610
VL  - 290
DO  - 10.1016/j.jclepro.2020.125610
ER  - 

@article{
author = "Marinković, Snežana and Carević, Vedran and Dragaš, Jelena",
year = "2020",
abstract = "In comparative Life Cycle Assessment (LCA) of concrete structures it is of crucial importance to provide the functional equivalence of compared alternatives. Most commonly, the comparison is performed between the structures made of conventional and green concrete mixtures. Since they have different mechanical and durability properties, corresponding structures have different strength and service life. While resolving this problem, two approaches are generally possible: either correction of the functional unit volume or correction of the calculated environmental impacts with compressive strength and duration of service life, if functional unit has the same volume. In this work, in order to assess the effect of service life modeling in LCA, both approaches were tested. As a demonstration, comparison of both slabs and beams made of conventional and high volume fly ash concrete exposed to carbonation was carried out. LCA was performed for 94 different mixtures from reported experimental research and calculated environmental impacts (climate change, acidification, eutrophication, photochemical-oxidant creation, and abiotic depletion of fossil fuels) for both approaches were compared. Results showed that different modeling of service life in LCA can result in totally different, even opposite conclusions. With slightly larger volume of functional unit (7%–20%), all normalized environmental impacts of high volume fly ash concrete structural members were lower for an order of magnitude (6–7 times) compared to those obtained on the basis of the same volume approach. Therefore, drawing conclusions only on the basis of service life modeling with the same volume approach may be misleading. The proper choice of the best alternative should be based on the integrated assessment which includes structural, environmental and cost assessment of the structure as a whole.",
publisher = "Elsevier Ltd",
journal = "Journal of Cleaner Production",
title = "The role of service life in Life Cycle Assessment of concrete structures",
pages = "125610",
volume = "290",
doi = "10.1016/j.jclepro.2020.125610"
}

Marinković, S., Carević, V.,& Dragaš, J.. (2020). The role of service life in Life Cycle Assessment of concrete structures. in Journal of Cleaner Production
Elsevier Ltd., 290, 125610.
https://doi.org/10.1016/j.jclepro.2020.125610

Marinković S, Carević V, Dragaš J. The role of service life in Life Cycle Assessment of concrete structures. in Journal of Cleaner Production. 2020;290:125610.
doi:10.1016/j.jclepro.2020.125610 .

Marinković, Snežana, Carević, Vedran, Dragaš, Jelena, "The role of service life in Life Cycle Assessment of concrete structures" in Journal of Cleaner Production, 290 (2020):125610,
https://doi.org/10.1016/j.jclepro.2020.125610 . .

TY  - CONF
AU  - Dragaš, Jelena
AU  - Pecić, Nenad
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2085
AB  - The use of fly ash in concrete lasts for almost a century. The first idea of using concrete as a place to
deposit fly ash and merely reduce the amount of waste came a long way to a today’s use of fly ash as a
basic component material of concrete. Extensive research and practical application regarding different
concrete types promoted the fly ash as a valuable supplementary cementitious material. The best use
of fly ash in concrete can be achieved only if the influence of fly ash on all concrete properties is
known. This paper gives a comprehensive summary of all fly ash applications in concrete with a
review of existing practical application, implementation in standards and challenges still to be
overcome. An analysis of future trends in concrete fly ash application and possible alternatives for
regions that already lack in fly ash quantities are presented and discussed.
PB  - Macedonian Association of Structural Engineers
C3  - Proceedings of the 18th International Symposium of MASE
T1  - Past, present and future of fly ash in concrete
EP  - 1368
SP  - 1358
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2085
ER  - 

@conference{
author = "Dragaš, Jelena and Pecić, Nenad",
year = "2019",
abstract = "The use of fly ash in concrete lasts for almost a century. The first idea of using concrete as a place to
deposit fly ash and merely reduce the amount of waste came a long way to a today’s use of fly ash as a
basic component material of concrete. Extensive research and practical application regarding different
concrete types promoted the fly ash as a valuable supplementary cementitious material. The best use
of fly ash in concrete can be achieved only if the influence of fly ash on all concrete properties is
known. This paper gives a comprehensive summary of all fly ash applications in concrete with a
review of existing practical application, implementation in standards and challenges still to be
overcome. An analysis of future trends in concrete fly ash application and possible alternatives for
regions that already lack in fly ash quantities are presented and discussed.",
publisher = "Macedonian Association of Structural Engineers",
journal = "Proceedings of the 18th International Symposium of MASE",
title = "Past, present and future of fly ash in concrete",
pages = "1368-1358",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2085"
}

Dragaš, J.,& Pecić, N.. (2019). Past, present and future of fly ash in concrete. in Proceedings of the 18th International Symposium of MASE
Macedonian Association of Structural Engineers., 1358-1368.
https://hdl.handle.net/21.15107/rcub_grafar_2085

Dragaš J, Pecić N. Past, present and future of fly ash in concrete. in Proceedings of the 18th International Symposium of MASE. 2019;:1358-1368.
https://hdl.handle.net/21.15107/rcub_grafar_2085 .

Dragaš, Jelena, Pecić, Nenad, "Past, present and future of fly ash in concrete" in Proceedings of the 18th International Symposium of MASE (2019):1358-1368,
https://hdl.handle.net/21.15107/rcub_grafar_2085 .

TY  - JOUR
AU  - Carević, Vedran
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1712
AB  - The reuse of industrial residue streams such as fly ash (FA) or waste materials such as recycled concrete aggregate (RCA) can be beneficial both from an economic and an ecological point of view. Extensive research, investigating different properties of these concrete types, has been carried out so far. However, durability remains a key property ensuring sustainable application of these materials in the construction sector that still needs more research to be fully understood. The main objective of this study was to evaluate the application of widely used models for carbonation depth prediction—defined for ordinary Portland cement concrete with natural aggregate (NAC)—to high volume FA concrete (HVFAC) and recycled aggregate concrete (RAC). The research presented in this paper was conducted in two steps. First, an experimental programme was designed to provide better understanding of the influence of different CO2 concentrations on the carbonation process kinetics in HVFAC, RAC and NAC. This was performed using accelerated carbonation tests (CO2 concentrations of 1%, 2%, 4% and 16%) and natural carbonation tests (duration 21 and 48 months). Furthermore, a database of previously published results of HVFAC and NAC carbonation depths was made in order to analyse the application of carbonation depth prediction defined by Tuutti and given in the fib Model Code 2010. It was shown that the existing models, providing the relationship between accelerated test results and natural carbonation depth, are applicable to NAC and RAC but not to HVFAC. Modifications of the above mentioned models were proposed in order to enable a more accurate and reliable prediction of the HVFAC carbonation depth under natural exposure conditions.
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete
EP  - 208
SP  - 194
VL  - 213
DO  - 10.1016/j.conbuildmat.2019.03.267
ER  - 

@article{
author = "Carević, Vedran and Ignjatović, Ivan and Dragaš, Jelena",
year = "2019",
abstract = "The reuse of industrial residue streams such as fly ash (FA) or waste materials such as recycled concrete aggregate (RCA) can be beneficial both from an economic and an ecological point of view. Extensive research, investigating different properties of these concrete types, has been carried out so far. However, durability remains a key property ensuring sustainable application of these materials in the construction sector that still needs more research to be fully understood. The main objective of this study was to evaluate the application of widely used models for carbonation depth prediction—defined for ordinary Portland cement concrete with natural aggregate (NAC)—to high volume FA concrete (HVFAC) and recycled aggregate concrete (RAC). The research presented in this paper was conducted in two steps. First, an experimental programme was designed to provide better understanding of the influence of different CO2 concentrations on the carbonation process kinetics in HVFAC, RAC and NAC. This was performed using accelerated carbonation tests (CO2 concentrations of 1%, 2%, 4% and 16%) and natural carbonation tests (duration 21 and 48 months). Furthermore, a database of previously published results of HVFAC and NAC carbonation depths was made in order to analyse the application of carbonation depth prediction defined by Tuutti and given in the fib Model Code 2010. It was shown that the existing models, providing the relationship between accelerated test results and natural carbonation depth, are applicable to NAC and RAC but not to HVFAC. Modifications of the above mentioned models were proposed in order to enable a more accurate and reliable prediction of the HVFAC carbonation depth under natural exposure conditions.",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete",
pages = "208-194",
volume = "213",
doi = "10.1016/j.conbuildmat.2019.03.267"
}

Carević, V., Ignjatović, I.,& Dragaš, J.. (2019). Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete. in Construction and Building Materials
Elsevier., 213, 194-208.
https://doi.org/10.1016/j.conbuildmat.2019.03.267

Carević V, Ignjatović I, Dragaš J. Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete. in Construction and Building Materials. 2019;213:194-208.
doi:10.1016/j.conbuildmat.2019.03.267 .

Carević, Vedran, Ignjatović, Ivan, Dragaš, Jelena, "Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete" in Construction and Building Materials, 213 (2019):194-208,
https://doi.org/10.1016/j.conbuildmat.2019.03.267 . .

TY  - JOUR
AU  - Carević, Vedran
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1717
AB  - The reuse of industrial residue streams such as fly ash (FA) or waste materials such as recycled concrete aggregate (RCA) can be beneficial both from an economic and an ecological point of view. Extensive research, investigating different properties of these concrete types, has been carried out so far. However, durability remains a key property ensuring sustainable application of these materials in the construction sector that still needs more research to be fully understood. The main objective of this study was to evaluate the application of widely used models for carbonation depth prediction—defined for ordinary Portland cement concrete with natural aggregate (NAC)—to high volume FA concrete (HVFAC) and recycled aggregate concrete (RAC). The research presented in this paper was conducted in two steps. First, an experimental programme was designed to provide better understanding of the influence of different CO2 concentrations on the carbonation process kinetics in HVFAC, RAC and NAC. This was performed using accelerated carbonation tests (CO2 concentrations of 1%, 2%, 4% and 16%) and natural carbonation tests (duration 21 and 48 months). Furthermore, a database of previously published results of HVFAC and NAC carbonation depths was made in order to analyse the application of carbonation depth prediction defined by Tuutti and given in the fib Model Code 2010. It was shown that the existing models, providing the relationship between accelerated test results and natural carbonation depth, are applicable to NAC and RAC but not to HVFAC. Modifications of the above mentioned models were proposed in order to enable a more accurate and reliable prediction of the HVFAC carbonation depth under natural exposure conditions.
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete
EP  - 208
SP  - 194
VL  - 213
DO  - 10.1016/j.conbuildmat.2019.03.267
ER  - 

@article{
author = "Carević, Vedran and Ignjatović, Ivan and Dragaš, Jelena",
year = "2019",
abstract = "The reuse of industrial residue streams such as fly ash (FA) or waste materials such as recycled concrete aggregate (RCA) can be beneficial both from an economic and an ecological point of view. Extensive research, investigating different properties of these concrete types, has been carried out so far. However, durability remains a key property ensuring sustainable application of these materials in the construction sector that still needs more research to be fully understood. The main objective of this study was to evaluate the application of widely used models for carbonation depth prediction—defined for ordinary Portland cement concrete with natural aggregate (NAC)—to high volume FA concrete (HVFAC) and recycled aggregate concrete (RAC). The research presented in this paper was conducted in two steps. First, an experimental programme was designed to provide better understanding of the influence of different CO2 concentrations on the carbonation process kinetics in HVFAC, RAC and NAC. This was performed using accelerated carbonation tests (CO2 concentrations of 1%, 2%, 4% and 16%) and natural carbonation tests (duration 21 and 48 months). Furthermore, a database of previously published results of HVFAC and NAC carbonation depths was made in order to analyse the application of carbonation depth prediction defined by Tuutti and given in the fib Model Code 2010. It was shown that the existing models, providing the relationship between accelerated test results and natural carbonation depth, are applicable to NAC and RAC but not to HVFAC. Modifications of the above mentioned models were proposed in order to enable a more accurate and reliable prediction of the HVFAC carbonation depth under natural exposure conditions.",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete",
pages = "208-194",
volume = "213",
doi = "10.1016/j.conbuildmat.2019.03.267"
}

Carević, V., Ignjatović, I.,& Dragaš, J.. (2019). Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete. in Construction and Building Materials
Elsevier., 213, 194-208.
https://doi.org/10.1016/j.conbuildmat.2019.03.267

Carević V, Ignjatović I, Dragaš J. Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete. in Construction and Building Materials. 2019;213:194-208.
doi:10.1016/j.conbuildmat.2019.03.267 .

Carević, Vedran, Ignjatović, Ivan, Dragaš, Jelena, "Model for practical carbonation depth prediction for high volume fly ash concrete and recycled aggregate concrete" in Construction and Building Materials, 213 (2019):194-208,
https://doi.org/10.1016/j.conbuildmat.2019.03.267 . .

TY  - JOUR
AU  - Stojanović, Goran
AU  - Radovanović, Milan
AU  - Krstić, Dejan
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
AU  - Carević, Vedran
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1725
AB  - Concrete is a material that is widely used by mankind. Although different deterioration mechanisms can lead to degradation of the concrete itself, reinforcement corrosion is the biggest durability issue for reinforced concrete structures. One of the key parameters influencing the corrosion rate is pH value. Accordingly, this work presents two capacitive sensor platforms—one based on parallel plate electrodes and the other based on a planar interdigitated electrode structure. The first platform is used to determine whether the pH value is lower or higher than a predetermined limit (around 11) and this device was successfully tested using concrete suspensions. The second platform can determine the pH value by establishing a relationship between pH and measured capacitance from a powdered concrete specimen. Both multi-layered platforms were manufactured by means of a cost-effective xurography technique, which provides technically and mechanically robust structures very quickly.
PB  - Basel : MDPI
T2  - Applied Sciences
T1  - Determination of pH in Powdered Concrete Samples or in Suspension
IS  - 16
SP  - 3257
VL  - 9
DO  - 10.3390/app9163257
ER  - 

@article{
author = "Stojanović, Goran and Radovanović, Milan and Krstić, Dejan and Ignjatović, Ivan and Dragaš, Jelena and Carević, Vedran",
year = "2019",
abstract = "Concrete is a material that is widely used by mankind. Although different deterioration mechanisms can lead to degradation of the concrete itself, reinforcement corrosion is the biggest durability issue for reinforced concrete structures. One of the key parameters influencing the corrosion rate is pH value. Accordingly, this work presents two capacitive sensor platforms—one based on parallel plate electrodes and the other based on a planar interdigitated electrode structure. The first platform is used to determine whether the pH value is lower or higher than a predetermined limit (around 11) and this device was successfully tested using concrete suspensions. The second platform can determine the pH value by establishing a relationship between pH and measured capacitance from a powdered concrete specimen. Both multi-layered platforms were manufactured by means of a cost-effective xurography technique, which provides technically and mechanically robust structures very quickly.",
publisher = "Basel : MDPI",
journal = "Applied Sciences",
title = "Determination of pH in Powdered Concrete Samples or in Suspension",
number = "16",
pages = "3257",
volume = "9",
doi = "10.3390/app9163257"
}

Stojanović, G., Radovanović, M., Krstić, D., Ignjatović, I., Dragaš, J.,& Carević, V.. (2019). Determination of pH in Powdered Concrete Samples or in Suspension. in Applied Sciences
Basel : MDPI., 9(16), 3257.
https://doi.org/10.3390/app9163257

Stojanović G, Radovanović M, Krstić D, Ignjatović I, Dragaš J, Carević V. Determination of pH in Powdered Concrete Samples or in Suspension. in Applied Sciences. 2019;9(16):3257.
doi:10.3390/app9163257 .

Stojanović, Goran, Radovanović, Milan, Krstić, Dejan, Ignjatović, Ivan, Dragaš, Jelena, Carević, Vedran, "Determination of pH in Powdered Concrete Samples or in Suspension" in Applied Sciences, 9, no. 16 (2019):3257,
https://doi.org/10.3390/app9163257 . .

TY  - CONF
AU  - Radević, Aleksandar
AU  - Dragaš, Jelena
AU  - Carević, Vedran
AU  - Zakić, Dimitrije
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2081
PB  - Association of Structural Engineers of Serbia
C3  - Proceedings of the 15th Congress of Association of Structural Engineers of Serbia
T1  - The influence of different curing conditions on cement and high volume fly ash concrete properties
EP  - 309
SP  - 300
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2081
ER  - 

@conference{
author = "Radević, Aleksandar and Dragaš, Jelena and Carević, Vedran and Zakić, Dimitrije",
year = "2018",
publisher = "Association of Structural Engineers of Serbia",
journal = "Proceedings of the 15th Congress of Association of Structural Engineers of Serbia",
title = "The influence of different curing conditions on cement and high volume fly ash concrete properties",
pages = "309-300",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2081"
}

Radević, A., Dragaš, J., Carević, V.,& Zakić, D.. (2018). The influence of different curing conditions on cement and high volume fly ash concrete properties. in Proceedings of the 15th Congress of Association of Structural Engineers of Serbia
Association of Structural Engineers of Serbia., 300-309.
https://hdl.handle.net/21.15107/rcub_grafar_2081

Radević A, Dragaš J, Carević V, Zakić D. The influence of different curing conditions on cement and high volume fly ash concrete properties. in Proceedings of the 15th Congress of Association of Structural Engineers of Serbia. 2018;:300-309.
https://hdl.handle.net/21.15107/rcub_grafar_2081 .

Radević, Aleksandar, Dragaš, Jelena, Carević, Vedran, Zakić, Dimitrije, "The influence of different curing conditions on cement and high volume fly ash concrete properties" in Proceedings of the 15th Congress of Association of Structural Engineers of Serbia (2018):300-309,
https://hdl.handle.net/21.15107/rcub_grafar_2081 .

TY  - JOUR
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - Pecić, Nenad
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1713
AB  - Six simply supported reinforced concrete beams were tested under sustained loads for 450 days. The beams were made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC) and high-volume fly ash concrete (HVFAC); two beams were made from each concrete and loaded after 7 and 28 days. On the beams, deflections, cracking and strains were measured while concrete specimens were used to determine physical-mechanical properties of concretes and measure shrinkage and creep. Results showed similar increases in deflections relative to initial deflections for all six beams. The results are also compared with code predictions and with existing results in literature.
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete
EP  - 358
SP  - 344
VL  - 176
DO  - 10.1016/j.conbuildmat.2018.05.002
ER  - 

@article{
author = "Tošić, Nikola and Marinković, Snežana and Pecić, Nenad and Ignjatović, Ivan and Dragaš, Jelena",
year = "2018",
abstract = "Six simply supported reinforced concrete beams were tested under sustained loads for 450 days. The beams were made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC) and high-volume fly ash concrete (HVFAC); two beams were made from each concrete and loaded after 7 and 28 days. On the beams, deflections, cracking and strains were measured while concrete specimens were used to determine physical-mechanical properties of concretes and measure shrinkage and creep. Results showed similar increases in deflections relative to initial deflections for all six beams. The results are also compared with code predictions and with existing results in literature.",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete",
pages = "358-344",
volume = "176",
doi = "10.1016/j.conbuildmat.2018.05.002"
}

Tošić, N., Marinković, S., Pecić, N., Ignjatović, I.,& Dragaš, J.. (2018). Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete. in Construction and Building Materials
Elsevier., 176, 344-358.
https://doi.org/10.1016/j.conbuildmat.2018.05.002

Tošić N, Marinković S, Pecić N, Ignjatović I, Dragaš J. Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete. in Construction and Building Materials. 2018;176:344-358.
doi:10.1016/j.conbuildmat.2018.05.002 .

Tošić, Nikola, Marinković, Snežana, Pecić, Nenad, Ignjatović, Ivan, Dragaš, Jelena, "Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete" in Construction and Building Materials, 176 (2018):344-358,
https://doi.org/10.1016/j.conbuildmat.2018.05.002 . .

TY  - THES
AU  - Dragaš, Jelena
PY  - 2018
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=6440
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:19161/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=513804178
UR  - http://nardus.mpn.gov.rs/123456789/10564
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1660
AB  - Бетон је један од најчешће коришћених материјала данашњице. Међутим,током производње цемента, испушта се приближно једна тона CO2 за свакутону произведеног портланд цементног клинкера. До сада је уложено пунотруда у проналажење одрживих решења за бетон као конструкцијскиматеријал. Сви ови напори имају за циљ унапређења животне средине наисти начин: очувањем природних ресурса, смањењем емисије CO2 исмањењем количине насталог отпада. Сви ови циљеви се могу постићиупотребом летећег пепела као делимичне замене цемента у бетону:коришћењем отпада уместо природних ресурса за производњу бетона,смањењем емисије CO2 кроз смањење коришћења портланд цемента исмањењем количине депонованог пепела. Управо из наведених разлога,данас је свеприсутна општа тежња замене већих количина портланд цементау бетону различитим замењујућим цементним материјалима (ЦМ).Бетон са великим садржајем летећег пепела (БВСЛП)—бетон са најмање 50%летећег пепела у укупној маси ЦМ—постао је једна од најперспективнијиходрживих алтернатива конвенционалном цементом бетону. Прегледпостојеће литературе и расположивих извора показао је да се БВСЛПтренутно углавном користи као део темеља конструкција. Међутим,потребно је још доста истраживања да би са сигурношћу могао да сепримењује у грађевинској индустрији као конструкцијски бетон. Већинаистраживања спроведених до сада усмерена је на одређивање физичких имеханичких својстава БВСЛП. Кроз ограничен број студија спроведено јетестирање конструктивних елемената у пуној величини произведених одБВСЛП како би се утврдила његова потенцијална употреба уармиранобетонским конструкцијама. Главна сврха овог истраживања била јепроцена могућности примене БВСЛП као бетона за примену уконструкцијама...
AB  - Concrete is the most widely used construction material today. However, duringcement production, approximately one ton of CO2 is released for each ton ofPortland cement clinker produced. So far, immense effort has been put into findingsustainable solutions for concrete as a structural material. All of these efforts aimat the same environmental improvements: preservation of natural resources,lowering of CO2 emissions, and decreasing the amount of generated waste. With flyash as a partial replacement of cement in concrete all these aims can beaccomplished: using waste instead of natural resources for concrete production,lowering CO2 emissions through the reduction of Portland cement use anddecreasing the amount of deposited fly ash in landfills. It is for these reasons thattoday there is a general trend of replacing higher amounts of Portland cement inconcrete with different supplementary cementitious materials (CM).High volume fly ash concrete (HVFAC)—concrete with at least 50% of fly ash intotal CM mass—has become one of the most promising sustainable alternatives toconventional concrete. Reviewing the existing literature and available sourcesrevealed that HVFAC is currently mostly used on construction sites as a part offoundations. However, much more research is still needed for its safe applicationin the construction industry as structural concrete. Most research so far focusedonly on the evaluation of HVFAC physical and mechanical properties. Only alimited number of studies implemented full-scale testing of structural membersproduced with HVFAC to determine its potential use in reinforced concretestructures. The main purpose of this research was to evaluate HVFAC as concretefor structural application.This thesis presents an experimental program developed in two phases. In the firstphase, research was performed in order to define the process of developingstructural-grade HVFAC mix design using a class F fly ash obtained from one powerplant in Serbia...
PB  - Универзитет у Београду, Грађевински факултет
T2  - Универзитет у Београду
T1  - Гранична носивост армиранобетонских гредних носача од бетона са великим садржајем летећег пепела
UR  - https://hdl.handle.net/21.15107/rcub_nardus_10564
ER  - 

@phdthesis{
author = "Dragaš, Jelena",
year = "2018",
abstract = "Бетон је један од најчешће коришћених материјала данашњице. Међутим,током производње цемента, испушта се приближно једна тона CO2 за свакутону произведеног портланд цементног клинкера. До сада је уложено пунотруда у проналажење одрживих решења за бетон као конструкцијскиматеријал. Сви ови напори имају за циљ унапређења животне средине наисти начин: очувањем природних ресурса, смањењем емисије CO2 исмањењем количине насталог отпада. Сви ови циљеви се могу постићиупотребом летећег пепела као делимичне замене цемента у бетону:коришћењем отпада уместо природних ресурса за производњу бетона,смањењем емисије CO2 кроз смањење коришћења портланд цемента исмањењем количине депонованог пепела. Управо из наведених разлога,данас је свеприсутна општа тежња замене већих количина портланд цементау бетону различитим замењујућим цементним материјалима (ЦМ).Бетон са великим садржајем летећег пепела (БВСЛП)—бетон са најмање 50%летећег пепела у укупној маси ЦМ—постао је једна од најперспективнијиходрживих алтернатива конвенционалном цементом бетону. Прегледпостојеће литературе и расположивих извора показао је да се БВСЛПтренутно углавном користи као део темеља конструкција. Међутим,потребно је још доста истраживања да би са сигурношћу могао да сепримењује у грађевинској индустрији као конструкцијски бетон. Већинаистраживања спроведених до сада усмерена је на одређивање физичких имеханичких својстава БВСЛП. Кроз ограничен број студија спроведено јетестирање конструктивних елемената у пуној величини произведених одБВСЛП како би се утврдила његова потенцијална употреба уармиранобетонским конструкцијама. Главна сврха овог истраживања била јепроцена могућности примене БВСЛП као бетона за примену уконструкцијама..., Concrete is the most widely used construction material today. However, duringcement production, approximately one ton of CO2 is released for each ton ofPortland cement clinker produced. So far, immense effort has been put into findingsustainable solutions for concrete as a structural material. All of these efforts aimat the same environmental improvements: preservation of natural resources,lowering of CO2 emissions, and decreasing the amount of generated waste. With flyash as a partial replacement of cement in concrete all these aims can beaccomplished: using waste instead of natural resources for concrete production,lowering CO2 emissions through the reduction of Portland cement use anddecreasing the amount of deposited fly ash in landfills. It is for these reasons thattoday there is a general trend of replacing higher amounts of Portland cement inconcrete with different supplementary cementitious materials (CM).High volume fly ash concrete (HVFAC)—concrete with at least 50% of fly ash intotal CM mass—has become one of the most promising sustainable alternatives toconventional concrete. Reviewing the existing literature and available sourcesrevealed that HVFAC is currently mostly used on construction sites as a part offoundations. However, much more research is still needed for its safe applicationin the construction industry as structural concrete. Most research so far focusedonly on the evaluation of HVFAC physical and mechanical properties. Only alimited number of studies implemented full-scale testing of structural membersproduced with HVFAC to determine its potential use in reinforced concretestructures. The main purpose of this research was to evaluate HVFAC as concretefor structural application.This thesis presents an experimental program developed in two phases. In the firstphase, research was performed in order to define the process of developingstructural-grade HVFAC mix design using a class F fly ash obtained from one powerplant in Serbia...",
publisher = "Универзитет у Београду, Грађевински факултет",
journal = "Универзитет у Београду",
title = "Гранична носивост армиранобетонских гредних носача од бетона са великим садржајем летећег пепела",
url = "https://hdl.handle.net/21.15107/rcub_nardus_10564"
}

Dragaš, J.. (2018). Гранична носивост армиранобетонских гредних носача од бетона са великим садржајем летећег пепела. in Универзитет у Београду
Универзитет у Београду, Грађевински факултет..
https://hdl.handle.net/21.15107/rcub_nardus_10564

Dragaš J. Гранична носивост армиранобетонских гредних носача од бетона са великим садржајем летећег пепела. in Универзитет у Београду. 2018;.
https://hdl.handle.net/21.15107/rcub_nardus_10564 .

Dragaš, Jelena, "Гранична носивост армиранобетонских гредних носача од бетона са великим садржајем летећег пепела" in Универзитет у Београду (2018),
https://hdl.handle.net/21.15107/rcub_nardus_10564 .

TY  - JOUR
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - Pecić, Nenad
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/939
AB  - Six simply supported reinforced concrete beams were tested under sustained loads for 450 days. The beams were made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC) and high volume fly ash concrete (HVFAC); two beams were made from each concrete and loaded after 7 and 28 days. On the beams, deflections, cracking and strains were measured while concrete specimens were used to determine physical-mechanical properties of concretes and measure shrinkage and creep. Results showed similar increases in deflections relative to initial deflections for all six beams. The results are also compared with code predictions and with existing results in literature.
PB  - Elsevier Ltd
T2  - Construction and Building Materials
T1  - Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete
EP  - 358
SP  - 344
VL  - 176
DO  - 10.1016/j.conbuildmat.2018.05.002
ER  - 

@article{
author = "Tošić, Nikola and Marinković, Snežana and Pecić, Nenad and Ignjatović, Ivan and Dragaš, Jelena",
year = "2018",
abstract = "Six simply supported reinforced concrete beams were tested under sustained loads for 450 days. The beams were made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC) and high volume fly ash concrete (HVFAC); two beams were made from each concrete and loaded after 7 and 28 days. On the beams, deflections, cracking and strains were measured while concrete specimens were used to determine physical-mechanical properties of concretes and measure shrinkage and creep. Results showed similar increases in deflections relative to initial deflections for all six beams. The results are also compared with code predictions and with existing results in literature.",
publisher = "Elsevier Ltd",
journal = "Construction and Building Materials",
title = "Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete",
pages = "358-344",
volume = "176",
doi = "10.1016/j.conbuildmat.2018.05.002"
}

Tošić, N., Marinković, S., Pecić, N., Ignjatović, I.,& Dragaš, J.. (2018). Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete. in Construction and Building Materials
Elsevier Ltd., 176, 344-358.
https://doi.org/10.1016/j.conbuildmat.2018.05.002

Tošić N, Marinković S, Pecić N, Ignjatović I, Dragaš J. Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete. in Construction and Building Materials. 2018;176:344-358.
doi:10.1016/j.conbuildmat.2018.05.002 .

Tošić, Nikola, Marinković, Snežana, Pecić, Nenad, Ignjatović, Ivan, Dragaš, Jelena, "Long-term behaviour of reinforced beams made with natural or recycled aggregate concrete and high-volume fly ash concrete" in Construction and Building Materials, 176 (2018):344-358,
https://doi.org/10.1016/j.conbuildmat.2018.05.002 . .