TY  - JOUR
AU  - Nikolić, Jelena
AU  - Tošić, Nikola
AU  - Murcia-Delso, Juan
AU  - Kostić, Svetlana
PY  - 2024
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3445
AB  - This paper summarises current research findings related to the behaviour and simulation of a relatively new type
of structural component: recycled aggregate concrete-filled steel tube columns (RACFST). The first part of the
paper presents a review of the latest experimental campaigns on RACFST columns subjected to a variety of
loading conditions. For each of loading condition, highlight observations about the behaviour of RACFST columns are presented. The second part of the paper provides a summary of numerical modelling approaches
developed for simulating the structural behaviour of RACFST columns. Special attention is paid to the selection
and calibration of material models for recycled aggregate concrete. Finally, directions for future investigations in
this area are outlined and discussed. The review will benefit researchers and professionals seeking to gain an indepth understanding of the behaviour of RACFST columns, and fills a gap in existing literature regarding a
number of practical issues related to the numerical modelling of these components.
PB  - Elsevier
T2  - Engineering Structures
T1  - Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes
VL  - 303
DO  - 10.1016/j.engstruct.2024.117514
ER  - 

@article{
author = "Nikolić, Jelena and Tošić, Nikola and Murcia-Delso, Juan and Kostić, Svetlana",
year = "2024",
abstract = "This paper summarises current research findings related to the behaviour and simulation of a relatively new type
of structural component: recycled aggregate concrete-filled steel tube columns (RACFST). The first part of the
paper presents a review of the latest experimental campaigns on RACFST columns subjected to a variety of
loading conditions. For each of loading condition, highlight observations about the behaviour of RACFST columns are presented. The second part of the paper provides a summary of numerical modelling approaches
developed for simulating the structural behaviour of RACFST columns. Special attention is paid to the selection
and calibration of material models for recycled aggregate concrete. Finally, directions for future investigations in
this area are outlined and discussed. The review will benefit researchers and professionals seeking to gain an indepth understanding of the behaviour of RACFST columns, and fills a gap in existing literature regarding a
number of practical issues related to the numerical modelling of these components.",
publisher = "Elsevier",
journal = "Engineering Structures",
title = "Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes",
volume = "303",
doi = "10.1016/j.engstruct.2024.117514"
}

Nikolić, J., Tošić, N., Murcia-Delso, J.,& Kostić, S.. (2024). Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes. in Engineering Structures
Elsevier., 303.
https://doi.org/10.1016/j.engstruct.2024.117514

Nikolić J, Tošić N, Murcia-Delso J, Kostić S. Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes. in Engineering Structures. 2024;303.
doi:10.1016/j.engstruct.2024.117514 .

Nikolić, Jelena, Tošić, Nikola, Murcia-Delso, Juan, Kostić, Svetlana, "Comprehensive review of the structural behaviour and numerical modelling of recycled aggregate concrete-filled steel tubes" in Engineering Structures, 303 (2024),
https://doi.org/10.1016/j.engstruct.2024.117514 . .

TY  - JOUR
AU  - Marinković, Snežana
AU  - Josa, Irene
AU  - Braymand, Sandrine
AU  - Tošić, Nikola
PY  - 2023
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3359
AB  - The environmental impacts of activities such as raw material extraction, construction
of infrastructure, and demolition, place construction as one of the
sectors that exert the highest pressures on the environment, society, and economy.
Some of the major environmental impacts for which the construction
industry is responsible are mineral resource depletion, greenhouse gas emissions,
and waste generation. Among the different strategies that exist to
decrease such impacts, recycling demolition waste into recycled concrete
aggregates has been considered a promising alternative. As such, at present,
the literature dealing with the impact assessment of recycled aggregate concrete
structures is very extensive. Therefore, the objective of this article is to
present a critical view of the state-of-the-art in terms of sustainability assessment
of recycled aggregate concrete structures, taking a holistic perspective by
considering environmental, social, and economic impacts.
PB  - Wiley
T2  - Structural Concrete
T1  - Sustainability assessment of recycled aggregate concrete structures: A critical view on the current state-of-knowledge and practice
EP  - 1979
IS  - 2
SP  - 1956
VL  - 24
DO  - 10.1002/suco.202201245
ER  - 

@article{
author = "Marinković, Snežana and Josa, Irene and Braymand, Sandrine and Tošić, Nikola",
year = "2023",
abstract = "The environmental impacts of activities such as raw material extraction, construction
of infrastructure, and demolition, place construction as one of the
sectors that exert the highest pressures on the environment, society, and economy.
Some of the major environmental impacts for which the construction
industry is responsible are mineral resource depletion, greenhouse gas emissions,
and waste generation. Among the different strategies that exist to
decrease such impacts, recycling demolition waste into recycled concrete
aggregates has been considered a promising alternative. As such, at present,
the literature dealing with the impact assessment of recycled aggregate concrete
structures is very extensive. Therefore, the objective of this article is to
present a critical view of the state-of-the-art in terms of sustainability assessment
of recycled aggregate concrete structures, taking a holistic perspective by
considering environmental, social, and economic impacts.",
publisher = "Wiley",
journal = "Structural Concrete",
title = "Sustainability assessment of recycled aggregate concrete structures: A critical view on the current state-of-knowledge and practice",
pages = "1979-1956",
number = "2",
volume = "24",
doi = "10.1002/suco.202201245"
}

Marinković, S., Josa, I., Braymand, S.,& Tošić, N.. (2023). Sustainability assessment of recycled aggregate concrete structures: A critical view on the current state-of-knowledge and practice. in Structural Concrete
Wiley., 24(2), 1956-1979.
https://doi.org/10.1002/suco.202201245

Marinković S, Josa I, Braymand S, Tošić N. Sustainability assessment of recycled aggregate concrete structures: A critical view on the current state-of-knowledge and practice. in Structural Concrete. 2023;24(2):1956-1979.
doi:10.1002/suco.202201245 .

Marinković, Snežana, Josa, Irene, Braymand, Sandrine, Tošić, Nikola, "Sustainability assessment of recycled aggregate concrete structures: A critical view on the current state-of-knowledge and practice" in Structural Concrete, 24, no. 2 (2023):1956-1979,
https://doi.org/10.1002/suco.202201245 . .

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  - JOUR
AU  - Radović, Andrija
AU  - Hafez, Hisham
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - De La Fuente, Albert
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3360
AB  - Producing limestone powder requires comparably far less energy than the production of ordinary
Portland cement (OPC), making it a promising sustainable solution for partial replacement of OPC
in concrete. Lower production energy could be translated into lower environmental impact and
lower cost, which are two pillars of the sustainability of the resulting concrete. However, the
question remains if replacing OPC with larger percentages of limestone powder would compromise
the performance of the resulting concrete to a level that surpasses the environmental and
economic gains. In order to assess the collective impact of these concretes, a performance-based
multi-criteria decision analysis framework, ECO2, is used. For that purpose, 26 experimentally
verified, concrete mixtures with and without limestone powder were evaluated through potential
application in two types of reinforced concrete (RC) structural elements (slabs and columns)
under identical environmental condition. The main results of the research showed a clear environmental advantage of concrete with a reduced OPC content, but the relatively higher superplasticizer amount in some cases could affect the final sustainability performance of the resulting mix. In the case of RC slabs, the best ECO2 score was obtained for concrete containing limestone powder. Mixtures with 200–250 kg of cement per unit volume of concrete had the highest ECO2 score for all the considered criteria. In the second case, due to the nature of the structural performance requirements in columns, the crucial influence of the concrete compressive strength is clear. The obtained results have shown approximately equal sustainability potential of OPC and limestone concretes in vertical elements such as columns. However, it seems that a certain improvement in the design of concrete mixtures with a high limestone powder content could
make these competitive in all fields.
PB  - Elsevier
T2  - Journal of Building Engineering
T1  - ECO2 framework assessment of limestone powder concrete slabs and columns
SP  - 104928
VL  - 57
DO  - 10.1016/j.jobe.2022.104928
ER  - 

@article{
author = "Radović, Andrija and Hafez, Hisham and Tošić, Nikola and Marinković, Snežana and De La Fuente, Albert",
year = "2022",
abstract = "Producing limestone powder requires comparably far less energy than the production of ordinary
Portland cement (OPC), making it a promising sustainable solution for partial replacement of OPC
in concrete. Lower production energy could be translated into lower environmental impact and
lower cost, which are two pillars of the sustainability of the resulting concrete. However, the
question remains if replacing OPC with larger percentages of limestone powder would compromise
the performance of the resulting concrete to a level that surpasses the environmental and
economic gains. In order to assess the collective impact of these concretes, a performance-based
multi-criteria decision analysis framework, ECO2, is used. For that purpose, 26 experimentally
verified, concrete mixtures with and without limestone powder were evaluated through potential
application in two types of reinforced concrete (RC) structural elements (slabs and columns)
under identical environmental condition. The main results of the research showed a clear environmental advantage of concrete with a reduced OPC content, but the relatively higher superplasticizer amount in some cases could affect the final sustainability performance of the resulting mix. In the case of RC slabs, the best ECO2 score was obtained for concrete containing limestone powder. Mixtures with 200–250 kg of cement per unit volume of concrete had the highest ECO2 score for all the considered criteria. In the second case, due to the nature of the structural performance requirements in columns, the crucial influence of the concrete compressive strength is clear. The obtained results have shown approximately equal sustainability potential of OPC and limestone concretes in vertical elements such as columns. However, it seems that a certain improvement in the design of concrete mixtures with a high limestone powder content could
make these competitive in all fields.",
publisher = "Elsevier",
journal = "Journal of Building Engineering",
title = "ECO2 framework assessment of limestone powder concrete slabs and columns",
pages = "104928",
volume = "57",
doi = "10.1016/j.jobe.2022.104928"
}

Radović, A., Hafez, H., Tošić, N., Marinković, S.,& De La Fuente, A.. (2022). ECO2 framework assessment of limestone powder concrete slabs and columns. in Journal of Building Engineering
Elsevier., 57, 104928.
https://doi.org/10.1016/j.jobe.2022.104928

Radović A, Hafez H, Tošić N, Marinković S, De La Fuente A. ECO2 framework assessment of limestone powder concrete slabs and columns. in Journal of Building Engineering. 2022;57:104928.
doi:10.1016/j.jobe.2022.104928 .

Radović, Andrija, Hafez, Hisham, Tošić, Nikola, Marinković, Snežana, De La Fuente, Albert, "ECO2 framework assessment of limestone powder concrete slabs and columns" in Journal of Building Engineering, 57 (2022):104928,
https://doi.org/10.1016/j.jobe.2022.104928 . .

TY  - JOUR
AU  - Tošić, Nikola
AU  - De La Fuente, Albert
AU  - Marinković, Snežana
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3375
AB  - A parametric analysis of deflection control of reinforced recycled aggregate concrete (RAC) one-way members is presented in this study. Within the study, member boundary conditions, ambient conditions (relative humidity), reinforcement ratios, and quasi-permanent–to–design load ratios (as per the Eurocode framework) are varied. Through the analysis, the change in deflections is observed relative to the substitution ratio of RCA (from natural aggregate concrete, NAC, to RAC with 100% of coarse RCA) and span-to-effective depth ratio (L/d). The results of the analysis enable a clear overview of the variability of the deflections of RAC members relative to NAC.
PB  - Associated Cement Companies Ltd.
T2  - The Indian Concrete Journal
T1  - Deflection Control of One-Way Reinforced Recycled Aggregate Concrete Members
EP  - 48
IS  - 1
SP  - 42
VL  - 96
UR  - https://hdl.handle.net/21.15107/rcub_grafar_3375
ER  - 

@article{
author = "Tošić, Nikola and De La Fuente, Albert and Marinković, Snežana",
year = "2022",
abstract = "A parametric analysis of deflection control of reinforced recycled aggregate concrete (RAC) one-way members is presented in this study. Within the study, member boundary conditions, ambient conditions (relative humidity), reinforcement ratios, and quasi-permanent–to–design load ratios (as per the Eurocode framework) are varied. Through the analysis, the change in deflections is observed relative to the substitution ratio of RCA (from natural aggregate concrete, NAC, to RAC with 100% of coarse RCA) and span-to-effective depth ratio (L/d). The results of the analysis enable a clear overview of the variability of the deflections of RAC members relative to NAC.",
publisher = "Associated Cement Companies Ltd.",
journal = "The Indian Concrete Journal",
title = "Deflection Control of One-Way Reinforced Recycled Aggregate Concrete Members",
pages = "48-42",
number = "1",
volume = "96",
url = "https://hdl.handle.net/21.15107/rcub_grafar_3375"
}

Tošić, N., De La Fuente, A.,& Marinković, S.. (2022). Deflection Control of One-Way Reinforced Recycled Aggregate Concrete Members. in The Indian Concrete Journal
Associated Cement Companies Ltd.., 96(1), 42-48.
https://hdl.handle.net/21.15107/rcub_grafar_3375

Tošić N, De La Fuente A, Marinković S. Deflection Control of One-Way Reinforced Recycled Aggregate Concrete Members. in The Indian Concrete Journal. 2022;96(1):42-48.
https://hdl.handle.net/21.15107/rcub_grafar_3375 .

Tošić, Nikola, De La Fuente, Albert, Marinković, Snežana, "Deflection Control of One-Way Reinforced Recycled Aggregate Concrete Members" in The Indian Concrete Journal, 96, no. 1 (2022):42-48,
https://hdl.handle.net/21.15107/rcub_grafar_3375 .

TY  - JOUR
AU  - Aidarov, Stanislav
AU  - Nadaždi, Ana
AU  - Pugach, Evgeniy
AU  - Tošić, Nikola
AU  - de la Fuente, Albert
PY  - 2022
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2643
AB  - Fibre reinforced concrete (FRC) is increasingly being used in elements with high structural responsibility, the constructed FRC column-supported flat slabs (CSFSs, hereinafter) with partial or even total substitution of reinforcing steel bars being a supporting evidence for that statement. These pioneer experiences provide encouraging results with respect to resource optimization and construction time reduction without jeopardising the structural reliability. Despite such promising achievements, the use of FRC in CSFSs is still limited in the building sector. To provide an additional impulse for the use of FRC, a comprehensive comparison between FRC and traditional reinforced concrete (RC) technologies for CSFSs in terms of execution procedure and overall costs is needed. With this in mind, an industrial-oriented study was carried out with the main objective of elaborating a simplified method for the preliminary comparison of RC and FRC solutions. This method permits to assess the major amount of the required reinforcement (flexural reinforcement) followed by an evaluation of the time saving effect due to the partial or total substitution of reinforcing steel bars by fibres. For this purpose and for the sake of generalization, several databases were examined and 33 interviews with experts on in situ construction were conducted so that a wide range of productivity rates and other particularities could be identified. Based on the proposed method, a case study was analysed in order to indicate the potential direct costs (materials + labour) for a number of RC and FRC solutions using data from the examined databases and conducted interviews. The results reflect an increment of direct costs for both fibre and hybrid (fibre + reinforcing steel bars, HFRC) solutions; however, these increment can be compensated by the reduction of the construction period and, as a consequence, time-dependent costs (i.e., preliminaries, equipment costs, overheads, and finance costs). The outcomes of this research are meant to provide support to designers and construction planners with regard to the suitability of using FRC for CSFSs.
T2  - Journal of Building Engineering
T1  - Cost-oriented analysis of fibre reinforced concrete column-supported flat slabs construction
SP  - 104205
VL  - 51
DO  - 10.1016/j.jobe.2022.104205
ER  - 

@article{
author = "Aidarov, Stanislav and Nadaždi, Ana and Pugach, Evgeniy and Tošić, Nikola and de la Fuente, Albert",
year = "2022",
abstract = "Fibre reinforced concrete (FRC) is increasingly being used in elements with high structural responsibility, the constructed FRC column-supported flat slabs (CSFSs, hereinafter) with partial or even total substitution of reinforcing steel bars being a supporting evidence for that statement. These pioneer experiences provide encouraging results with respect to resource optimization and construction time reduction without jeopardising the structural reliability. Despite such promising achievements, the use of FRC in CSFSs is still limited in the building sector. To provide an additional impulse for the use of FRC, a comprehensive comparison between FRC and traditional reinforced concrete (RC) technologies for CSFSs in terms of execution procedure and overall costs is needed. With this in mind, an industrial-oriented study was carried out with the main objective of elaborating a simplified method for the preliminary comparison of RC and FRC solutions. This method permits to assess the major amount of the required reinforcement (flexural reinforcement) followed by an evaluation of the time saving effect due to the partial or total substitution of reinforcing steel bars by fibres. For this purpose and for the sake of generalization, several databases were examined and 33 interviews with experts on in situ construction were conducted so that a wide range of productivity rates and other particularities could be identified. Based on the proposed method, a case study was analysed in order to indicate the potential direct costs (materials + labour) for a number of RC and FRC solutions using data from the examined databases and conducted interviews. The results reflect an increment of direct costs for both fibre and hybrid (fibre + reinforcing steel bars, HFRC) solutions; however, these increment can be compensated by the reduction of the construction period and, as a consequence, time-dependent costs (i.e., preliminaries, equipment costs, overheads, and finance costs). The outcomes of this research are meant to provide support to designers and construction planners with regard to the suitability of using FRC for CSFSs.",
journal = "Journal of Building Engineering",
title = "Cost-oriented analysis of fibre reinforced concrete column-supported flat slabs construction",
pages = "104205",
volume = "51",
doi = "10.1016/j.jobe.2022.104205"
}

Aidarov, S., Nadaždi, A., Pugach, E., Tošić, N.,& de la Fuente, A.. (2022). Cost-oriented analysis of fibre reinforced concrete column-supported flat slabs construction. in Journal of Building Engineering, 51, 104205.
https://doi.org/10.1016/j.jobe.2022.104205

Aidarov S, Nadaždi A, Pugach E, Tošić N, de la Fuente A. Cost-oriented analysis of fibre reinforced concrete column-supported flat slabs construction. in Journal of Building Engineering. 2022;51:104205.
doi:10.1016/j.jobe.2022.104205 .

Aidarov, Stanislav, Nadaždi, Ana, Pugach, Evgeniy, Tošić, Nikola, de la Fuente, Albert, "Cost-oriented analysis of fibre reinforced concrete column-supported flat slabs construction" in Journal of Building Engineering, 51 (2022):104205,
https://doi.org/10.1016/j.jobe.2022.104205 . .

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  - JOUR
AU  - Josa, Irene
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - De La Fuente, Albert
AU  - Aguado, Antonio
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3361
AB  - With increasing construction activity and concrete consumption globally, the economic,
environmental, and social impacts of human activities continue to increase rapidly. Therefore, it is
imperative to assess the choice and construction of each structure and structural component from a
sustainability-based perspective. In this study, such a multi-criteria decision-making approach using
the MIVES method is applied to the choice of grouped continuous flight auger (CFA) piles. Different
alternatives of CFA piles are studied: length (10 and 20 m), reinforcement (steel cage reinforcement
and structural fibers), and aggregates (natural crushed aggregates and recycled aggregate concrete
sourced from stationary and mobile recycling plants), based on experimentally verified mix designs.
All alternatives were analyzed considering economic, environmental, and social requirements, using
a decision-making tree with eight criteria and eleven indicators, with weights assigned by an expert
panel. The results of the analysis showed a clear advantage in terms of all three sustainability
requirements for CFA piles with steel fibers and recycled aggregate concrete, with all solutions with
steel cage reinforcement having significantly lower values of the sustainability index. Such results
demonstrate the need for implementing innovative solutions even in structural members such as
CFA piles that are often considered in insufficient detail.
PB  - MDPI
T2  - Sustainability
T1  - Sustainability-Oriented Multi-Criteria Analysis of Different Continuous Flight Auger Piles
SP  - 7552
VL  - 13
DO  - 10.3390/su13147552
ER  - 

@article{
author = "Josa, Irene and Tošić, Nikola and Marinković, Snežana and De La Fuente, Albert and Aguado, Antonio",
year = "2021",
abstract = "With increasing construction activity and concrete consumption globally, the economic,
environmental, and social impacts of human activities continue to increase rapidly. Therefore, it is
imperative to assess the choice and construction of each structure and structural component from a
sustainability-based perspective. In this study, such a multi-criteria decision-making approach using
the MIVES method is applied to the choice of grouped continuous flight auger (CFA) piles. Different
alternatives of CFA piles are studied: length (10 and 20 m), reinforcement (steel cage reinforcement
and structural fibers), and aggregates (natural crushed aggregates and recycled aggregate concrete
sourced from stationary and mobile recycling plants), based on experimentally verified mix designs.
All alternatives were analyzed considering economic, environmental, and social requirements, using
a decision-making tree with eight criteria and eleven indicators, with weights assigned by an expert
panel. The results of the analysis showed a clear advantage in terms of all three sustainability
requirements for CFA piles with steel fibers and recycled aggregate concrete, with all solutions with
steel cage reinforcement having significantly lower values of the sustainability index. Such results
demonstrate the need for implementing innovative solutions even in structural members such as
CFA piles that are often considered in insufficient detail.",
publisher = "MDPI",
journal = "Sustainability",
title = "Sustainability-Oriented Multi-Criteria Analysis of Different Continuous Flight Auger Piles",
pages = "7552",
volume = "13",
doi = "10.3390/su13147552"
}

Josa, I., Tošić, N., Marinković, S., De La Fuente, A.,& Aguado, A.. (2021). Sustainability-Oriented Multi-Criteria Analysis of Different Continuous Flight Auger Piles. in Sustainability
MDPI., 13, 7552.
https://doi.org/10.3390/su13147552

Josa I, Tošić N, Marinković S, De La Fuente A, Aguado A. Sustainability-Oriented Multi-Criteria Analysis of Different Continuous Flight Auger Piles. in Sustainability. 2021;13:7552.
doi:10.3390/su13147552 .

Josa, Irene, Tošić, Nikola, Marinković, Snežana, De La Fuente, Albert, Aguado, Antonio, "Sustainability-Oriented Multi-Criteria Analysis of Different Continuous Flight Auger Piles" in Sustainability, 13 (2021):7552,
https://doi.org/10.3390/su13147552 . .

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  - JOUR
AU  - Tošić, Nikola
AU  - Kurama, Yahya
AU  - Marinković, Snežana
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/3362
AB  - Recycled aggregate concrete (RAC), i.e., concrete produced with recycled concrete aggregate
(RCA) has been heavily investigated recently, and the structural design of RAC is entering into
design codes. Nonetheless, the service load deflection behavior of RAC remains a challenge due to
its larger shrinkage and creep, and lower modulus of elasticity. A novel solution to this challenge
is the use of layered concrete, i.e., casting of horizontal layers of di erent concretes. To investigate
the potential benefits and limits of layered concrete, this study contains a numerical parametric
assessment of the time-dependent sustained service load deflections and environmental impacts of
homogeneous and layered NAC and RAC one-way slabs. Four types of reinforced concrete slabs were
considered: homogeneous slabs with 0%, 50% and 100% of coarse RCA (NAC, RAC50 and RAC100,
respectively) and layered L-RAC100 slabs with the bottom and top halves consisting of RAC100 and
NAC, respectively. In the deflection study, di erent statical systems, concrete strength classes and
relative humidity conditions were investigated. The results showed that the layered L-RAC100 slabs
performed as well as, or even better than, the NAC slabs due to the di erential shrinkage between
the layers. In terms of environmental performance, evaluated using a “cradle-to-gate” Life Cycle
Assessment approach, the L-RAC100 slabs also performed as well as, or slightly better than, the NAC
slabs. Therefore, layered NAC and RAC slabs can be a potentially advantageous solution from both
structural and environmental perspectives.
PB  - MDPI
T2  - Sustainability
T1  - Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete
SP  - 10278
VL  - 12
DO  - 10.3390/su122410278
ER  - 

@article{
author = "Tošić, Nikola and Kurama, Yahya and Marinković, Snežana",
year = "2020",
abstract = "Recycled aggregate concrete (RAC), i.e., concrete produced with recycled concrete aggregate
(RCA) has been heavily investigated recently, and the structural design of RAC is entering into
design codes. Nonetheless, the service load deflection behavior of RAC remains a challenge due to
its larger shrinkage and creep, and lower modulus of elasticity. A novel solution to this challenge
is the use of layered concrete, i.e., casting of horizontal layers of di erent concretes. To investigate
the potential benefits and limits of layered concrete, this study contains a numerical parametric
assessment of the time-dependent sustained service load deflections and environmental impacts of
homogeneous and layered NAC and RAC one-way slabs. Four types of reinforced concrete slabs were
considered: homogeneous slabs with 0%, 50% and 100% of coarse RCA (NAC, RAC50 and RAC100,
respectively) and layered L-RAC100 slabs with the bottom and top halves consisting of RAC100 and
NAC, respectively. In the deflection study, di erent statical systems, concrete strength classes and
relative humidity conditions were investigated. The results showed that the layered L-RAC100 slabs
performed as well as, or even better than, the NAC slabs due to the di erential shrinkage between
the layers. In terms of environmental performance, evaluated using a “cradle-to-gate” Life Cycle
Assessment approach, the L-RAC100 slabs also performed as well as, or slightly better than, the NAC
slabs. Therefore, layered NAC and RAC slabs can be a potentially advantageous solution from both
structural and environmental perspectives.",
publisher = "MDPI",
journal = "Sustainability",
title = "Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete",
pages = "10278",
volume = "12",
doi = "10.3390/su122410278"
}

Tošić, N., Kurama, Y.,& Marinković, S.. (2020). Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete. in Sustainability
MDPI., 12, 10278.
https://doi.org/10.3390/su122410278

Tošić N, Kurama Y, Marinković S. Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete. in Sustainability. 2020;12:10278.
doi:10.3390/su122410278 .

Tošić, Nikola, Kurama, Yahya, Marinković, Snežana, "Improved Serviceability and Environmental Performance of One-Way Slabs through the Use of Layered Natural and Recycled Aggregate Concrete" in Sustainability, 12 (2020):10278,
https://doi.org/10.3390/su122410278 . .

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  - Tošić, Nikola
AU  - Torrenti, Jean Michel
AU  - Sedran, Thierry
AU  - Ignjatović, Ivan
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2432
AB  - The use of recycled aggregate (RA) to produce recycled aggregate concrete (RAC) is a proven way of decreasing the consumption of natural aggregate (NA) and landfilling of construction and demolition waste. However, adoption of codes for the design of RAC and RAC structures has been lacking. Within the framework of the new fib Model Code 2020 and Eurocode 2, provisions for RAC can be adopted. Therefore, in this study, a comprehensive and critical review of literature on RAC and own meta-analyses of results are performed. Material properties of RAC and structural behaviour of reinforced and prestressed RAC members are analysed, and based on the findings, code adjustments for RAC are proposed. The results show that, in order to incorporate RAC into design codes, changes are necessary in expressions for physical–mechanical properties (volumetric mass, modulus of elasticity, tensile strength, fracture energy, peak and ultimate strains, shrinkage strain and creep coefficient), durability-related properties (minimum concrete cover for durability) and structural behaviour (shear strength of members not requiring shear reinforcement and deflections). The recommendations are formulated in terms of the total mass substitution rate of RA that can be classified as Type A according to standard EN 206 for concrete. The results and findings presented herein can provide an important contribution towards the codification of RAC use and the wider utilization of RA in construction.
PB  - Wiley-Blackwell
T2  - Structural Concrete
T1  - Towards a codified design of recycled aggregate concrete structures: background for the new fib Model Code 2020 and Eurocode 2
EP  - 2938
IS  - 5
SP  - 2916
VL  - 22
DO  - 10.1002/suco.202000512
ER  - 

@article{
author = "Tošić, Nikola and Torrenti, Jean Michel and Sedran, Thierry and Ignjatović, Ivan",
year = "2020",
abstract = "The use of recycled aggregate (RA) to produce recycled aggregate concrete (RAC) is a proven way of decreasing the consumption of natural aggregate (NA) and landfilling of construction and demolition waste. However, adoption of codes for the design of RAC and RAC structures has been lacking. Within the framework of the new fib Model Code 2020 and Eurocode 2, provisions for RAC can be adopted. Therefore, in this study, a comprehensive and critical review of literature on RAC and own meta-analyses of results are performed. Material properties of RAC and structural behaviour of reinforced and prestressed RAC members are analysed, and based on the findings, code adjustments for RAC are proposed. The results show that, in order to incorporate RAC into design codes, changes are necessary in expressions for physical–mechanical properties (volumetric mass, modulus of elasticity, tensile strength, fracture energy, peak and ultimate strains, shrinkage strain and creep coefficient), durability-related properties (minimum concrete cover for durability) and structural behaviour (shear strength of members not requiring shear reinforcement and deflections). The recommendations are formulated in terms of the total mass substitution rate of RA that can be classified as Type A according to standard EN 206 for concrete. The results and findings presented herein can provide an important contribution towards the codification of RAC use and the wider utilization of RA in construction.",
publisher = "Wiley-Blackwell",
journal = "Structural Concrete",
title = "Towards a codified design of recycled aggregate concrete structures: background for the new fib Model Code 2020 and Eurocode 2",
pages = "2938-2916",
number = "5",
volume = "22",
doi = "10.1002/suco.202000512"
}

Tošić, N., Torrenti, J. M., Sedran, T.,& Ignjatović, I.. (2020). Towards a codified design of recycled aggregate concrete structures: background for the new fib Model Code 2020 and Eurocode 2. in Structural Concrete
Wiley-Blackwell., 22(5), 2916-2938.
https://doi.org/10.1002/suco.202000512

Tošić N, Torrenti JM, Sedran T, Ignjatović I. Towards a codified design of recycled aggregate concrete structures: background for the new fib Model Code 2020 and Eurocode 2. in Structural Concrete. 2020;22(5):2916-2938.
doi:10.1002/suco.202000512 .

Tošić, Nikola, Torrenti, Jean Michel, Sedran, Thierry, Ignjatović, Ivan, "Towards a codified design of recycled aggregate concrete structures: background for the new fib Model Code 2020 and Eurocode 2" in Structural Concrete, 22, no. 5 (2020):2916-2938,
https://doi.org/10.1002/suco.202000512 . .

TY  - JOUR
AU  - Mirković, Katarina
AU  - Tošić, Nikola
AU  - Mladenović, Goran
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1730
AB  - In order to preserve natural resources, the use of waste and alternative materials in the construction and maintenance of roads is increasingly investigated. This paper presents the results of testing wearing course asphalt mixtures (AC 11s SURF 50/70) made with various percentages of fly ash, used as a partial or complete substitute for mineral filler. The properties of fly ash were determined to assess their suitability for use in asphalt mixtures. The experimental research was performed on asphalt samples containing fly ash from three different sources, with 25%, 50%, 75%, and 100% of mineral filler substitution. The control mixture was prepared with 100% of mineral filler. The paper presents the volumetric composition, stability, and flow of asphalt mixtures tested on standard Marshall’s samples, water sensitivity, and resistance to permanent deformation. The results of this study indicate that a satisfactory volumetric composition can be achieved by adding fly ash, while the bulk density and voids of the mineral and asphalt mixture generally depend on the type of fly ash and its content. The stability and flow of mixtures with fly ash are favourable compared with the control mixture. The water sensitivity of mixtures with fly ash is generally lower compared with the control mixture and depends on the type and percentage of fly ash. The resistance to permanent deformation of the asphalt mixtures depends on the fly ash type and percentage. The results obtained in this study are an important step towards broader implementation of fly ash in asphalt mixtures.
PB  - Hindawi
T2  - Advances in Civil Engineering
T1  - Effect of Different Types of Fly Ash on Properties of Asphalt Mixtures
VL  - 2019
DO  - 10.1155/2019/8107264
ER  - 

@article{
author = "Mirković, Katarina and Tošić, Nikola and Mladenović, Goran",
year = "2019",
abstract = "In order to preserve natural resources, the use of waste and alternative materials in the construction and maintenance of roads is increasingly investigated. This paper presents the results of testing wearing course asphalt mixtures (AC 11s SURF 50/70) made with various percentages of fly ash, used as a partial or complete substitute for mineral filler. The properties of fly ash were determined to assess their suitability for use in asphalt mixtures. The experimental research was performed on asphalt samples containing fly ash from three different sources, with 25%, 50%, 75%, and 100% of mineral filler substitution. The control mixture was prepared with 100% of mineral filler. The paper presents the volumetric composition, stability, and flow of asphalt mixtures tested on standard Marshall’s samples, water sensitivity, and resistance to permanent deformation. The results of this study indicate that a satisfactory volumetric composition can be achieved by adding fly ash, while the bulk density and voids of the mineral and asphalt mixture generally depend on the type of fly ash and its content. The stability and flow of mixtures with fly ash are favourable compared with the control mixture. The water sensitivity of mixtures with fly ash is generally lower compared with the control mixture and depends on the type and percentage of fly ash. The resistance to permanent deformation of the asphalt mixtures depends on the fly ash type and percentage. The results obtained in this study are an important step towards broader implementation of fly ash in asphalt mixtures.",
publisher = "Hindawi",
journal = "Advances in Civil Engineering",
title = "Effect of Different Types of Fly Ash on Properties of Asphalt Mixtures",
volume = "2019",
doi = "10.1155/2019/8107264"
}

Mirković, K., Tošić, N.,& Mladenović, G.. (2019). Effect of Different Types of Fly Ash on Properties of Asphalt Mixtures. in Advances in Civil Engineering
Hindawi., 2019.
https://doi.org/10.1155/2019/8107264

Mirković K, Tošić N, Mladenović G. Effect of Different Types of Fly Ash on Properties of Asphalt Mixtures. in Advances in Civil Engineering. 2019;2019.
doi:10.1155/2019/8107264 .

Mirković, Katarina, Tošić, Nikola, Mladenović, Goran, "Effect of Different Types of Fly Ash on Properties of Asphalt Mixtures" in Advances in Civil Engineering, 2019 (2019),
https://doi.org/10.1155/2019/8107264 . .

TY  - JOUR
AU  - Tošić, Nikola
AU  - de la Fuente, Albert
AU  - Marinković, Snežana
PY  - 2019
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1002
AB  - Recycled aggregate concrete (RAC) is a promising solution to addressing the sustainability issues raised by concrete production. However, its long-term properties are not fully characterised, especially creep behaviour, which is significant for the design of RAC structures. This study presents the results of a meta-analysis of previously published research on the creep behaviour of recycled aggregate concrete (RAC). The main goal of the study is to formulate an analytic expression for the creep coefficient of RAC as an extension of the fib Model Code 2010 creep prediction model. A database of experimental results on the creep of RAC and companion natural aggregate concrete (NAC), produced with the same effective water-cement ratio, was compiled from available literature and using strict selection criteria. The database is comprised of results from 10 studies, 46 creep curves (14 NAC and 32 RAC) and 233 data points. Compared with companion NAC, RAC displays a larger creep coefficient; the difference between RAC and NAC increases with increasing recycled concrete aggregate (RCA) content and decreases with increasing RAC compressive strength. When predicting the creep coefficient of RAC using the fib Model Code 2010's creep prediction model, relative to the model's performance on companion NAC, the creep coefficient of RAC is underestimated. A correction coefficient for the creep coefficient of RAC, xi(cc.RAC), is proposed for use with the fib Model Code 2010 model, dependent on RAC compressive strength and RCA replacement ratio.
PB  - Elsevier Ltd
T2  - Construction and Building Materials
T1  - Creep of recycled aggregate concrete: Experimental database and creep prediction model according to the fib Model Code 2010
EP  - 599
SP  - 590
VL  - 195
DO  - 10.1016/j.conbuildmat.2018.11.048
ER  - 

@article{
author = "Tošić, Nikola and de la Fuente, Albert and Marinković, Snežana",
year = "2019",
abstract = "Recycled aggregate concrete (RAC) is a promising solution to addressing the sustainability issues raised by concrete production. However, its long-term properties are not fully characterised, especially creep behaviour, which is significant for the design of RAC structures. This study presents the results of a meta-analysis of previously published research on the creep behaviour of recycled aggregate concrete (RAC). The main goal of the study is to formulate an analytic expression for the creep coefficient of RAC as an extension of the fib Model Code 2010 creep prediction model. A database of experimental results on the creep of RAC and companion natural aggregate concrete (NAC), produced with the same effective water-cement ratio, was compiled from available literature and using strict selection criteria. The database is comprised of results from 10 studies, 46 creep curves (14 NAC and 32 RAC) and 233 data points. Compared with companion NAC, RAC displays a larger creep coefficient; the difference between RAC and NAC increases with increasing recycled concrete aggregate (RCA) content and decreases with increasing RAC compressive strength. When predicting the creep coefficient of RAC using the fib Model Code 2010's creep prediction model, relative to the model's performance on companion NAC, the creep coefficient of RAC is underestimated. A correction coefficient for the creep coefficient of RAC, xi(cc.RAC), is proposed for use with the fib Model Code 2010 model, dependent on RAC compressive strength and RCA replacement ratio.",
publisher = "Elsevier Ltd",
journal = "Construction and Building Materials",
title = "Creep of recycled aggregate concrete: Experimental database and creep prediction model according to the fib Model Code 2010",
pages = "599-590",
volume = "195",
doi = "10.1016/j.conbuildmat.2018.11.048"
}

Tošić, N., de la Fuente, A.,& Marinković, S.. (2019). Creep of recycled aggregate concrete: Experimental database and creep prediction model according to the fib Model Code 2010. in Construction and Building Materials
Elsevier Ltd., 195, 590-599.
https://doi.org/10.1016/j.conbuildmat.2018.11.048

Tošić N, de la Fuente A, Marinković S. Creep of recycled aggregate concrete: Experimental database and creep prediction model according to the fib Model Code 2010. in Construction and Building Materials. 2019;195:590-599.
doi:10.1016/j.conbuildmat.2018.11.048 .

Tošić, Nikola, de la Fuente, Albert, Marinković, Snežana, "Creep of recycled aggregate concrete: Experimental database and creep prediction model according to the fib Model Code 2010" in Construction and Building Materials, 195 (2019):590-599,
https://doi.org/10.1016/j.conbuildmat.2018.11.048 . .

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  - Tošić, Nikola
PY  - 2018
UR  - http://eteze.bg.ac.rs/application/showtheses?thesesId=5982
UR  - https://fedorabg.bg.ac.rs/fedora/get/o:18190/bdef:Content/download
UR  - http://vbs.rs/scripts/cobiss?command=DISPLAY&base=70036&RID=513791890
UR  - http://nardus.mpn.gov.rs/123456789/9855
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1704
AB  - Concrete is the second most-used material in the world after water and its productionplaces a large strain on natural resources and the environment. This has prompted thesearch for sustainable alternatives to traditional Portland cement concrete. Among these’green concretes’, most promising, in the case of Serbia, are recycled aggregate concrete(RAC) and high-volume fly ash concrete (HVFAC)...
AB  - Beton je drugi najkoriš´ceniji materijal na svetu nakon vode i njegova proizvodnja jeodgovorna za veliku potrošnju prirodnih sirovina i uticaj na životnu sredinu zbog ˇcega suistraživaˇci poˇceli potragu za održivim alternativama konvencionalnim betonima od Portlandcementa. Med¯u ovim ’zelenim betonima’, u Srbiji najviše potencijala imaju betonisa recikliranim agregatom (RAC) i betoni sa velikim sadržajem lete´ceg pepela (HVFAC)...
PB  - Универзитет у Београду, Грађевински факултет
T2  - Универзитет у Београду
T1  - Behaviour of Reinforced Concrete Beams Made with Recycled and Waste Materials Under Long-Term Loading
UR  - https://hdl.handle.net/21.15107/rcub_nardus_9855
ER  - 

@phdthesis{
author = "Tošić, Nikola",
year = "2018",
abstract = "Concrete is the second most-used material in the world after water and its productionplaces a large strain on natural resources and the environment. This has prompted thesearch for sustainable alternatives to traditional Portland cement concrete. Among these’green concretes’, most promising, in the case of Serbia, are recycled aggregate concrete(RAC) and high-volume fly ash concrete (HVFAC)..., Beton je drugi najkoriš´ceniji materijal na svetu nakon vode i njegova proizvodnja jeodgovorna za veliku potrošnju prirodnih sirovina i uticaj na životnu sredinu zbog ˇcega suistraživaˇci poˇceli potragu za održivim alternativama konvencionalnim betonima od Portlandcementa. Med¯u ovim ’zelenim betonima’, u Srbiji najviše potencijala imaju betonisa recikliranim agregatom (RAC) i betoni sa velikim sadržajem lete´ceg pepela (HVFAC)...",
publisher = "Универзитет у Београду, Грађевински факултет",
journal = "Универзитет у Београду",
title = "Behaviour of Reinforced Concrete Beams Made with Recycled and Waste Materials Under Long-Term Loading",
url = "https://hdl.handle.net/21.15107/rcub_nardus_9855"
}

Tošić, N.. (2018). Behaviour of Reinforced Concrete Beams Made with Recycled and Waste Materials Under Long-Term Loading. in Универзитет у Београду
Универзитет у Београду, Грађевински факултет..
https://hdl.handle.net/21.15107/rcub_nardus_9855

Tošić N. Behaviour of Reinforced Concrete Beams Made with Recycled and Waste Materials Under Long-Term Loading. in Универзитет у Београду. 2018;.
https://hdl.handle.net/21.15107/rcub_nardus_9855 .

Tošić, Nikola, "Behaviour of Reinforced Concrete Beams Made with Recycled and Waste Materials Under Long-Term Loading" in Универзитет у Београду (2018),
https://hdl.handle.net/21.15107/rcub_nardus_9855 .

TY  - CONF
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - De Brito, Jorge
AU  - Pecić, Nenad
AU  - Ignjatović, Ivan
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1631
AB  - The environmental problems posed by the production of concrete can be solved namely by using green concrete produced with recycled and waste materials. This study intends to present results on the long-term properties of concrete produced with 100% coarse recycled concrete aggregate and concrete produced with 50% of class F fly ash in total cementitious materials and compare them with a companion natural aggregate concrete. The three concrete mixes were tested at the material level where shrinkage and creep were tested for 700 days on concrete prisms, and at the structural level where deflections, strains, and cracks of simply supported reinforc
PB  - Društvo građevinskih konstruktera Srbije, Beograd
C3  - ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor
T1  - Long-term properties of green concrete: testing at the material and structural level
EP  - 227
SP  - 218
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1631
ER  - 

@conference{
author = "Tošić, Nikola and Marinković, Snežana and De Brito, Jorge and Pecić, Nenad and Ignjatović, Ivan",
year = "2018",
abstract = "The environmental problems posed by the production of concrete can be solved namely by using green concrete produced with recycled and waste materials. This study intends to present results on the long-term properties of concrete produced with 100% coarse recycled concrete aggregate and concrete produced with 50% of class F fly ash in total cementitious materials and compare them with a companion natural aggregate concrete. The three concrete mixes were tested at the material level where shrinkage and creep were tested for 700 days on concrete prisms, and at the structural level where deflections, strains, and cracks of simply supported reinforc",
publisher = "Društvo građevinskih konstruktera Srbije, Beograd",
journal = "ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor",
title = "Long-term properties of green concrete: testing at the material and structural level",
pages = "227-218",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1631"
}

Tošić, N., Marinković, S., De Brito, J., Pecić, N.,& Ignjatović, I.. (2018). Long-term properties of green concrete: testing at the material and structural level. in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor
Društvo građevinskih konstruktera Srbije, Beograd., 218-227.
https://hdl.handle.net/21.15107/rcub_grafar_1631

Tošić N, Marinković S, De Brito J, Pecić N, Ignjatović I. Long-term properties of green concrete: testing at the material and structural level. in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor. 2018;:218-227.
https://hdl.handle.net/21.15107/rcub_grafar_1631 .

Tošić, Nikola, Marinković, Snežana, De Brito, Jorge, Pecić, Nenad, Ignjatović, Ivan, "Long-term properties of green concrete: testing at the material and structural level" in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor (2018):218-227,
https://hdl.handle.net/21.15107/rcub_grafar_1631 .

TY  - CONF
AU  - Tošić, Nikola
AU  - Radović, Andrija
AU  - Šakić, Bogdan
AU  - Marinković, Snežana
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1608
AB  - Reliably calculating the deflections is one of the more difficult aspects of the design of reinforced concrete members. All calculation models require a large number of experimental results for their calibration. Such results are lacking for beams made of green concretes with recycled and waste materials. This paper presents the results of applying analytical and numerical calculation models for predicting deflections of reinforced natural aggregate concrete, recycled aggregate concrete and high-volume fly ash concrete beams. Experimental results on six simply supported beams were compared with predictions obtained using the fib Model Code 2010 analytical model and a numerical model formulated using DIANA. Results confirm the applicability of these models in predicting deflections of green concrete beams.
PB  - Društvo građevinskih konstruktera Srbije, Beograd
C3  - ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor
T1  - Long-term deflections of green concrete beams: Analytical and numerical calculations
EP  - 429
SP  - 420
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1608
ER  - 

@conference{
author = "Tošić, Nikola and Radović, Andrija and Šakić, Bogdan and Marinković, Snežana",
year = "2018",
abstract = "Reliably calculating the deflections is one of the more difficult aspects of the design of reinforced concrete members. All calculation models require a large number of experimental results for their calibration. Such results are lacking for beams made of green concretes with recycled and waste materials. This paper presents the results of applying analytical and numerical calculation models for predicting deflections of reinforced natural aggregate concrete, recycled aggregate concrete and high-volume fly ash concrete beams. Experimental results on six simply supported beams were compared with predictions obtained using the fib Model Code 2010 analytical model and a numerical model formulated using DIANA. Results confirm the applicability of these models in predicting deflections of green concrete beams.",
publisher = "Društvo građevinskih konstruktera Srbije, Beograd",
journal = "ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor",
title = "Long-term deflections of green concrete beams: Analytical and numerical calculations",
pages = "429-420",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1608"
}

Tošić, N., Radović, A., Šakić, B.,& Marinković, S.. (2018). Long-term deflections of green concrete beams: Analytical and numerical calculations. in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor
Društvo građevinskih konstruktera Srbije, Beograd., 420-429.
https://hdl.handle.net/21.15107/rcub_grafar_1608

Tošić N, Radović A, Šakić B, Marinković S. Long-term deflections of green concrete beams: Analytical and numerical calculations. in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor. 2018;:420-429.
https://hdl.handle.net/21.15107/rcub_grafar_1608 .

Tošić, Nikola, Radović, Andrija, Šakić, Bogdan, Marinković, Snežana, "Long-term deflections of green concrete beams: Analytical and numerical calculations" in ASES International congress proceedings / Association of Structural Engineers of Serbia, 15th Congress, September 6-8th, 2018, Zlatibor (2018):420-429,
https://hdl.handle.net/21.15107/rcub_grafar_1608 .

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 . .

TY  - CONF
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - Ignjatović, Ivan
AU  - de la Fuente, Albert
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1585
AB  - This paper presents experimental results of long-term behavior of reinforced beams made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC), and high-volume fly ash concrete (HVFAC) under sustained load. Two 3.2 m span simply supported beams were cast from each concrete type and loaded after 7 and 28 days for a period of 450 days. Deflections, cracking, and strains were measured on the beams. Mechanical properties, shrinkage, and creep were measured on accompanying concrete specimens. Results showed similar mechanical properties of NAC and RAC and lower values for HVFAC. Shrinkage and creep were largest for RAC and smallest in the case of HVFAC. All beams had similar increases in deflections relative to their initial deflections. Deflection results are compared with fib Model Code 2010 predictions. Good agreement is found with results for RAC beams, whereas predictions for HVFAC beams show a significant overestimation of experimental results.
PB  - CRC Press, London
C3  - Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision: Proceedings of the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE 2018), 28-31 October 2018, Ghent, Belgium
T1  - Deflections of reinforced concrete beams made with recycled and waste materials under sustained load: Experiment and fib Model Code 2010 predictions
EP  - 1842
SP  - 1835
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1585
ER  - 

@conference{
author = "Tošić, Nikola and Marinković, Snežana and Ignjatović, Ivan and de la Fuente, Albert",
year = "2018",
abstract = "This paper presents experimental results of long-term behavior of reinforced beams made from natural aggregate concrete (NAC), recycled aggregate concrete (RAC), and high-volume fly ash concrete (HVFAC) under sustained load. Two 3.2 m span simply supported beams were cast from each concrete type and loaded after 7 and 28 days for a period of 450 days. Deflections, cracking, and strains were measured on the beams. Mechanical properties, shrinkage, and creep were measured on accompanying concrete specimens. Results showed similar mechanical properties of NAC and RAC and lower values for HVFAC. Shrinkage and creep were largest for RAC and smallest in the case of HVFAC. All beams had similar increases in deflections relative to their initial deflections. Deflection results are compared with fib Model Code 2010 predictions. Good agreement is found with results for RAC beams, whereas predictions for HVFAC beams show a significant overestimation of experimental results.",
publisher = "CRC Press, London",
journal = "Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision: Proceedings of the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE 2018), 28-31 October 2018, Ghent, Belgium",
title = "Deflections of reinforced concrete beams made with recycled and waste materials under sustained load: Experiment and fib Model Code 2010 predictions",
pages = "1842-1835",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1585"
}

Tošić, N., Marinković, S., Ignjatović, I.,& de la Fuente, A.. (2018). Deflections of reinforced concrete beams made with recycled and waste materials under sustained load: Experiment and fib Model Code 2010 predictions. in Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision: Proceedings of the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE 2018), 28-31 October 2018, Ghent, Belgium
CRC Press, London., 1835-1842.
https://hdl.handle.net/21.15107/rcub_grafar_1585

Tošić N, Marinković S, Ignjatović I, de la Fuente A. Deflections of reinforced concrete beams made with recycled and waste materials under sustained load: Experiment and fib Model Code 2010 predictions. in Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision: Proceedings of the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE 2018), 28-31 October 2018, Ghent, Belgium. 2018;:1835-1842.
https://hdl.handle.net/21.15107/rcub_grafar_1585 .

Tošić, Nikola, Marinković, Snežana, Ignjatović, Ivan, de la Fuente, Albert, "Deflections of reinforced concrete beams made with recycled and waste materials under sustained load: Experiment and fib Model Code 2010 predictions" in Life Cycle Analysis and Assessment in Civil Engineering: Towards an Integrated Vision: Proceedings of the Sixth International Symposium on Life-Cycle Civil Engineering (IALCCE 2018), 28-31 October 2018, Ghent, Belgium (2018):1835-1842,
https://hdl.handle.net/21.15107/rcub_grafar_1585 .

TY  - JOUR
AU  - Tošić, Nikola
AU  - de la Fuente, Albert
AU  - Marinković, Snežana
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/946
AB  - This paper describes a meta-analysis of previously published studies on the shrinkage strain of recycled aggregate concrete (RAC). The study aims at providing an analytic expression for the shrinkage strain of RAC to be used in conjunction with the existing fib Model Code 2010 shrinkage prediction model. For this purpose, a database of experimental results on the shrinkage of RAC and companion natural aggregate concrete (NAC), produced with the same water-cement ratio, was compiled using strict selection criteria. Results from 19 studies entered into the database, consisting of 125 shrinkage curves (39 NAC and 86 RAC) with a total of 424 data points. A comparison of RAC and companion NAC revealed that, on average, RAC displays a larger shrinkage strain. This difference increases with increasing recycled concrete aggregate (RCA) content and with decreasing compressive strength. Applying the fib Model Code 2010 shrinkage prediction model revealed that, relative to its performance on NAC, the shrinkage strain of RAC is underestimated. Finally, a correction coefficient for the shrinkage strain of RAC, zeta(cs),(RAC), to be used in conjunction with the fib Model Code 2010 model, was proposed in the form of a bivariate power function with RAC compressive strength and RCA replacement ratio as variables.
PB  - Springer Netherlands
T2  - Materials and Structures
T1  - Shrinkage of recycled aggregate concrete: experimental database and application of fib Model Code 2010
IS  - 5
VL  - 51
DO  - 10.1617/s11527-018-1258-0
ER  - 

@article{
author = "Tošić, Nikola and de la Fuente, Albert and Marinković, Snežana",
year = "2018",
abstract = "This paper describes a meta-analysis of previously published studies on the shrinkage strain of recycled aggregate concrete (RAC). The study aims at providing an analytic expression for the shrinkage strain of RAC to be used in conjunction with the existing fib Model Code 2010 shrinkage prediction model. For this purpose, a database of experimental results on the shrinkage of RAC and companion natural aggregate concrete (NAC), produced with the same water-cement ratio, was compiled using strict selection criteria. Results from 19 studies entered into the database, consisting of 125 shrinkage curves (39 NAC and 86 RAC) with a total of 424 data points. A comparison of RAC and companion NAC revealed that, on average, RAC displays a larger shrinkage strain. This difference increases with increasing recycled concrete aggregate (RCA) content and with decreasing compressive strength. Applying the fib Model Code 2010 shrinkage prediction model revealed that, relative to its performance on NAC, the shrinkage strain of RAC is underestimated. Finally, a correction coefficient for the shrinkage strain of RAC, zeta(cs),(RAC), to be used in conjunction with the fib Model Code 2010 model, was proposed in the form of a bivariate power function with RAC compressive strength and RCA replacement ratio as variables.",
publisher = "Springer Netherlands",
journal = "Materials and Structures",
title = "Shrinkage of recycled aggregate concrete: experimental database and application of fib Model Code 2010",
number = "5",
volume = "51",
doi = "10.1617/s11527-018-1258-0"
}

Tošić, N., de la Fuente, A.,& Marinković, S.. (2018). Shrinkage of recycled aggregate concrete: experimental database and application of fib Model Code 2010. in Materials and Structures
Springer Netherlands., 51(5).
https://doi.org/10.1617/s11527-018-1258-0

Tošić N, de la Fuente A, Marinković S. Shrinkage of recycled aggregate concrete: experimental database and application of fib Model Code 2010. in Materials and Structures. 2018;51(5).
doi:10.1617/s11527-018-1258-0 .

Tošić, Nikola, de la Fuente, Albert, Marinković, Snežana, "Shrinkage of recycled aggregate concrete: experimental database and application of fib Model Code 2010" in Materials and Structures, 51, no. 5 (2018),
https://doi.org/10.1617/s11527-018-1258-0 . .

TY  - CONF
AU  - Šakić, Bogdan
AU  - Tošić, Nikola
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1617
PB  - Društvo građevinskih konstruktera Srbije, Beograd
C3  - Zbornik radova sa nacionalnog kongresa DGKS / Društvо građevinskih konstruktera Srbije, 15. kongres, 6-8. septembar 2018, Zlatibor
T1  - Projektovanje elemenata od mikroarmiranog betona prema fib Model Code 2010
EP  - 388
SP  - 379
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1617
ER  - 

@conference{
author = "Šakić, Bogdan and Tošić, Nikola",
year = "2018",
publisher = "Društvo građevinskih konstruktera Srbije, Beograd",
journal = "Zbornik radova sa nacionalnog kongresa DGKS / Društvо građevinskih konstruktera Srbije, 15. kongres, 6-8. septembar 2018, Zlatibor",
title = "Projektovanje elemenata od mikroarmiranog betona prema fib Model Code 2010",
pages = "388-379",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1617"
}

Šakić, B.,& Tošić, N.. (2018). Projektovanje elemenata od mikroarmiranog betona prema fib Model Code 2010. in Zbornik radova sa nacionalnog kongresa DGKS / Društvо građevinskih konstruktera Srbije, 15. kongres, 6-8. septembar 2018, Zlatibor
Društvo građevinskih konstruktera Srbije, Beograd., 379-388.
https://hdl.handle.net/21.15107/rcub_grafar_1617

Šakić B, Tošić N. Projektovanje elemenata od mikroarmiranog betona prema fib Model Code 2010. in Zbornik radova sa nacionalnog kongresa DGKS / Društvо građevinskih konstruktera Srbije, 15. kongres, 6-8. septembar 2018, Zlatibor. 2018;:379-388.
https://hdl.handle.net/21.15107/rcub_grafar_1617 .

Šakić, Bogdan, Tošić, Nikola, "Projektovanje elemenata od mikroarmiranog betona prema fib Model Code 2010" in Zbornik radova sa nacionalnog kongresa DGKS / Društvо građevinskih konstruktera Srbije, 15. kongres, 6-8. septembar 2018, Zlatibor (2018):379-388,
https://hdl.handle.net/21.15107/rcub_grafar_1617 .

TY  - CONF
AU  - Dragaš, Jelena
AU  - Ignjatović, Ivan
AU  - Marinković, Snežana
AU  - Tošić, Nikola
AU  - Milićević, Ivan
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1557
PB  - MASE - Macedonian Association of Structurel Engineers, Skopje
C3  - Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017
T1  - High-volume fly ash concrete: Part 1: Mechanical properties and k-value concept
EP  - 690
SP  - 679
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1557
ER  - 

@conference{
author = "Dragaš, Jelena and Ignjatović, Ivan and Marinković, Snežana and Tošić, Nikola and Milićević, Ivan",
year = "2017",
publisher = "MASE - Macedonian Association of Structurel Engineers, Skopje",
journal = "Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017",
title = "High-volume fly ash concrete: Part 1: Mechanical properties and k-value concept",
pages = "690-679",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1557"
}

Dragaš, J., Ignjatović, I., Marinković, S., Tošić, N.,& Milićević, I.. (2017). High-volume fly ash concrete: Part 1: Mechanical properties and k-value concept. in Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017
MASE - Macedonian Association of Structurel Engineers, Skopje., 679-690.
https://hdl.handle.net/21.15107/rcub_grafar_1557

Dragaš J, Ignjatović I, Marinković S, Tošić N, Milićević I. High-volume fly ash concrete: Part 1: Mechanical properties and k-value concept. in Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017. 2017;:679-690.
https://hdl.handle.net/21.15107/rcub_grafar_1557 .

Dragaš, Jelena, Ignjatović, Ivan, Marinković, Snežana, Tošić, Nikola, Milićević, Ivan, "High-volume fly ash concrete: Part 1: Mechanical properties and k-value concept" in Proceedings / Macedonian Association of Structural Engineers, 17th International Symposium, Ohrid, Macedonia 4-7 October 2017 = Zbornik na trudovi / Društvo na gradežnite konstruktori na Makedonija, 17-ti Megunaroden simpozium, Ohrid, 4-7 oktomvri 2017 (2017):679-690,
https://hdl.handle.net/21.15107/rcub_grafar_1557 .

TY  - CONF
AU  - Tošić, Nikola
AU  - Marinković, Snežana
AU  - Ignjatović, Ivan
AU  - Bajat, Branislav
AU  - Pejović, Milutin
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/829
AB  - The behavior of reinforced concrete under long-term loading is an important topic when designing concrete structures. Creep and shrinkage of concrete and long-term deflections of concrete structures, mainly reinforced concrete beams, have been studied for many decades but because of the long-term nature of these tests, existing experiments are relatively scarce. More importantly, there are significant challenges when carrying out these tests. These include achieving optimal beam design to ensure a realistic stress distribution with a developed cracked state, measuring deflections from self-weight, adequately measuring elastic deflections and strains, and instantaneously applying the imposed load. The problem is exacerbated with the advent of sustainable structural concretes containing recycled and waste materials-green concretes; they possess specific properties and experimental results for these concretes are even scarcer. In this paper, an experimental setup, designed to test the structural behavior of reinforced concrete beams in a four-point bending test under long-term loading, is described. Six full-scale beams were produced from natural aggregate concrete, recycled aggregate concrete and high-volume fly ash concrete-two beams from each concrete type, one loaded after 7 and the other after 28 days. The load consisted of beam self-weight and imposed permanent load. The beam design procedure is explained, which enabled an adequate stress distribution and crack formation with a minimum imposed load. A method was developed to use geodetic equipment and measurements to determine the deflection from self-weight and a special support and loading structure were designed to enable instant imposed load application and the measurement of elastic deflections and strains. The complete test setup, equipment and procedure are explained and the advantages and deficiencies of this approach are discussed.
PB  - Springer International Publishing
C3  - High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium
T1  - Experimental setup for measuring long-term behavior of green reinforced concrete beams
EP  - 2364
SP  - 2356
DO  - 10.1007/978-3-319-59471-2_268
ER  - 

@conference{
author = "Tošić, Nikola and Marinković, Snežana and Ignjatović, Ivan and Bajat, Branislav and Pejović, Milutin",
year = "2017",
abstract = "The behavior of reinforced concrete under long-term loading is an important topic when designing concrete structures. Creep and shrinkage of concrete and long-term deflections of concrete structures, mainly reinforced concrete beams, have been studied for many decades but because of the long-term nature of these tests, existing experiments are relatively scarce. More importantly, there are significant challenges when carrying out these tests. These include achieving optimal beam design to ensure a realistic stress distribution with a developed cracked state, measuring deflections from self-weight, adequately measuring elastic deflections and strains, and instantaneously applying the imposed load. The problem is exacerbated with the advent of sustainable structural concretes containing recycled and waste materials-green concretes; they possess specific properties and experimental results for these concretes are even scarcer. In this paper, an experimental setup, designed to test the structural behavior of reinforced concrete beams in a four-point bending test under long-term loading, is described. Six full-scale beams were produced from natural aggregate concrete, recycled aggregate concrete and high-volume fly ash concrete-two beams from each concrete type, one loaded after 7 and the other after 28 days. The load consisted of beam self-weight and imposed permanent load. The beam design procedure is explained, which enabled an adequate stress distribution and crack formation with a minimum imposed load. A method was developed to use geodetic equipment and measurements to determine the deflection from self-weight and a special support and loading structure were designed to enable instant imposed load application and the measurement of elastic deflections and strains. The complete test setup, equipment and procedure are explained and the advantages and deficiencies of this approach are discussed.",
publisher = "Springer International Publishing",
journal = "High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium",
title = "Experimental setup for measuring long-term behavior of green reinforced concrete beams",
pages = "2364-2356",
doi = "10.1007/978-3-319-59471-2_268"
}

Tošić, N., Marinković, S., Ignjatović, I., Bajat, B.,& Pejović, M.. (2017). Experimental setup for measuring long-term behavior of green reinforced concrete beams. in High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium
Springer International Publishing., 2356-2364.
https://doi.org/10.1007/978-3-319-59471-2_268

Tošić N, Marinković S, Ignjatović I, Bajat B, Pejović M. Experimental setup for measuring long-term behavior of green reinforced concrete beams. in High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium. 2017;:2356-2364.
doi:10.1007/978-3-319-59471-2_268 .

Tošić, Nikola, Marinković, Snežana, Ignjatović, Ivan, Bajat, Branislav, Pejović, Milutin, "Experimental setup for measuring long-term behavior of green reinforced concrete beams" in High Tech Concrete: Where Technology and Engineering Meet - Proceedings of the 2017 fib Symposium (2017):2356-2364,
https://doi.org/10.1007/978-3-319-59471-2_268 . .