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

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

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

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

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

TY  - CONF
AU  - Tanasijević, Gordana
AU  - Provis, John
AU  - Carević, Vedran
AU  - Ignjatović, Ivan
AU  - Komljenović, Miroslav
PY  - 2021
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2270
AB  - In this paper the effect of accelerated carbonation process on the effectiveness of immobilization of cesium (simulated radioactive and toxic waste) in the alkali-activated blast furnace slag (AABFS) matrix was studied. Blast furnace slag (BFS) was contaminated with 2% and 5% Cs (with respect to the dry BFS mass) and alkali-activated with sodium silicate solution, while the AABFS samples were cured sealed in plastic envelopes for 24 h at 95oC. First series of AABFS samples were exposed to accelerated carbonation (open curing), while the second (reference) series of 
 ABFS samples left to aging (also sealed) at room temperature until testing. Thereafter AABFS samples were subjected to a short-term (five-day) leaching tests according to the ANSI/ANS-16.1-2003 standard. The strength of AABFS mortars were tested according to the SRPS EN 196-1 standard, while the carbonation was confirmed by phenolphthalein test and SEM analysis. The diffusion coefficient (D) and non-dimensional leachability index (L) of cesium leached from ABFS were calculated according to the ANSI/ANS-16.1–2003 standard. A correlation between the accelerated carbonation process and the effectiveness of immobilization of cesium in AABFS was established.
PB  - Slovenian National Building and Civil Engineering Institute (ZAG)
C3  - Proceedings of the 2nd International Conference on Construction Materials for a Sustainable Future
T1  - Effect of accelerated carbonation on the efficiency of immobilization of Cs in the alkaliactivated blast furnace slag
EP  - 311
SP  - 303
UR  - https://hdl.handle.net/21.15107/rcub_grafar_2270
ER  - 

@conference{
author = "Tanasijević, Gordana and Provis, John and Carević, Vedran and Ignjatović, Ivan and Komljenović, Miroslav",
year = "2021",
abstract = "In this paper the effect of accelerated carbonation process on the effectiveness of immobilization of cesium (simulated radioactive and toxic waste) in the alkali-activated blast furnace slag (AABFS) matrix was studied. Blast furnace slag (BFS) was contaminated with 2% and 5% Cs (with respect to the dry BFS mass) and alkali-activated with sodium silicate solution, while the AABFS samples were cured sealed in plastic envelopes for 24 h at 95oC. First series of AABFS samples were exposed to accelerated carbonation (open curing), while the second (reference) series of 
 ABFS samples left to aging (also sealed) at room temperature until testing. Thereafter AABFS samples were subjected to a short-term (five-day) leaching tests according to the ANSI/ANS-16.1-2003 standard. The strength of AABFS mortars were tested according to the SRPS EN 196-1 standard, while the carbonation was confirmed by phenolphthalein test and SEM analysis. The diffusion coefficient (D) and non-dimensional leachability index (L) of cesium leached from ABFS were calculated according to the ANSI/ANS-16.1–2003 standard. A correlation between the accelerated carbonation process and the effectiveness of immobilization of cesium in AABFS was established.",
publisher = "Slovenian National Building and Civil Engineering Institute (ZAG)",
journal = "Proceedings of the 2nd International Conference on Construction Materials for a Sustainable Future",
title = "Effect of accelerated carbonation on the efficiency of immobilization of Cs in the alkaliactivated blast furnace slag",
pages = "311-303",
url = "https://hdl.handle.net/21.15107/rcub_grafar_2270"
}

Tanasijević, G., Provis, J., Carević, V., Ignjatović, I.,& Komljenović, M.. (2021). Effect of accelerated carbonation on the efficiency of immobilization of Cs in the alkaliactivated blast furnace slag. in Proceedings of the 2nd International Conference on Construction Materials for a Sustainable Future
Slovenian National Building and Civil Engineering Institute (ZAG)., 303-311.
https://hdl.handle.net/21.15107/rcub_grafar_2270

Tanasijević G, Provis J, Carević V, Ignjatović I, Komljenović M. Effect of accelerated carbonation on the efficiency of immobilization of Cs in the alkaliactivated blast furnace slag. in Proceedings of the 2nd International Conference on Construction Materials for a Sustainable Future. 2021;:303-311.
https://hdl.handle.net/21.15107/rcub_grafar_2270 .

Tanasijević, Gordana, Provis, John, Carević, Vedran, Ignjatović, Ivan, Komljenović, Miroslav, "Effect of accelerated carbonation on the efficiency of immobilization of Cs in the alkaliactivated blast furnace slag" in Proceedings of the 2nd International Conference on Construction Materials for a Sustainable Future (2021):303-311,
https://hdl.handle.net/21.15107/rcub_grafar_2270 .

TY  - JOUR
AU  - Poletanović, Bojan
AU  - Dragaš, Jelena
AU  - Ignjatović, Ivan
AU  - Komljenović, Miroslav
AU  - Merta, Ildiko
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2172
AB  - Two alkali-activated mortars with different solid prime materials were analysed. The first mortar contained fly ash, had lower density, higher water absorption, lower compactness, lower compressive strength, similar flexural strength and was less brittle than the second one with fly ash + slag.
The addition of hemp fibres slightly changed the mortars’ density, water absorption, compressive and flexural strength, however significantly increased its energy absorption capacity.
The initially more brittle matrix exhibited significantly higher relative toughness increase. The smoother and less porous fibre/matrix interface assured through numerous fibre/matrix contact points a more optimal fibre/matrix interfacial bond- and frictional stress transfer.
PB  - Elsevier Ltd.
T2  - Construction and Building Materials
T1  - Physical and mechanical properties of hemp fibre reinforced alkali-activated fly ash and fly ash/slag mortars
SP  - 119677
VL  - 259
DO  - 10.1016/j.conbuildmat.2020.119677
ER  - 

@article{
author = "Poletanović, Bojan and Dragaš, Jelena and Ignjatović, Ivan and Komljenović, Miroslav and Merta, Ildiko",
year = "2020",
abstract = "Two alkali-activated mortars with different solid prime materials were analysed. The first mortar contained fly ash, had lower density, higher water absorption, lower compactness, lower compressive strength, similar flexural strength and was less brittle than the second one with fly ash + slag.
The addition of hemp fibres slightly changed the mortars’ density, water absorption, compressive and flexural strength, however significantly increased its energy absorption capacity.
The initially more brittle matrix exhibited significantly higher relative toughness increase. The smoother and less porous fibre/matrix interface assured through numerous fibre/matrix contact points a more optimal fibre/matrix interfacial bond- and frictional stress transfer.",
publisher = "Elsevier Ltd.",
journal = "Construction and Building Materials",
title = "Physical and mechanical properties of hemp fibre reinforced alkali-activated fly ash and fly ash/slag mortars",
pages = "119677",
volume = "259",
doi = "10.1016/j.conbuildmat.2020.119677"
}

Poletanović, B., Dragaš, J., Ignjatović, I., Komljenović, M.,& Merta, I.. (2020). Physical and mechanical properties of hemp fibre reinforced alkali-activated fly ash and fly ash/slag mortars. in Construction and Building Materials
Elsevier Ltd.., 259, 119677.
https://doi.org/10.1016/j.conbuildmat.2020.119677

Poletanović B, Dragaš J, Ignjatović I, Komljenović M, Merta I. Physical and mechanical properties of hemp fibre reinforced alkali-activated fly ash and fly ash/slag mortars. in Construction and Building Materials. 2020;259:119677.
doi:10.1016/j.conbuildmat.2020.119677 .

Poletanović, Bojan, Dragaš, Jelena, Ignjatović, Ivan, Komljenović, Miroslav, Merta, Ildiko, "Physical and mechanical properties of hemp fibre reinforced alkali-activated fly ash and fly ash/slag mortars" in Construction and Building Materials, 259 (2020):119677,
https://doi.org/10.1016/j.conbuildmat.2020.119677 . .

TY  - CONF
AU  - Simonova, Hana
AU  - Dragaš, Jelena
AU  - Kucharczykova, Barbara
AU  - Kersner, Zbznek
AU  - Ignjatović, Ivan
AU  - Komljenović, Miroslav
AU  - Nikolić, Violeta
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1587
PB  - Fédération internationale du beton, Lausanne
C3  - fib 2018 - Better, Smarter, Stronger
T1  - Fracture Behaviour of Geopolymer Mortars Reinforced with Hemp Fibres
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1587
ER  - 

@conference{
author = "Simonova, Hana and Dragaš, Jelena and Kucharczykova, Barbara and Kersner, Zbznek and Ignjatović, Ivan and Komljenović, Miroslav and Nikolić, Violeta",
year = "2018",
publisher = "Fédération internationale du beton, Lausanne",
journal = "fib 2018 - Better, Smarter, Stronger",
title = "Fracture Behaviour of Geopolymer Mortars Reinforced with Hemp Fibres",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1587"
}

Simonova, H., Dragaš, J., Kucharczykova, B., Kersner, Z., Ignjatović, I., Komljenović, M.,& Nikolić, V.. (2018). Fracture Behaviour of Geopolymer Mortars Reinforced with Hemp Fibres. in fib 2018 - Better, Smarter, Stronger
Fédération internationale du beton, Lausanne..
https://hdl.handle.net/21.15107/rcub_grafar_1587

Simonova H, Dragaš J, Kucharczykova B, Kersner Z, Ignjatović I, Komljenović M, Nikolić V. Fracture Behaviour of Geopolymer Mortars Reinforced with Hemp Fibres. in fib 2018 - Better, Smarter, Stronger. 2018;.
https://hdl.handle.net/21.15107/rcub_grafar_1587 .

Simonova, Hana, Dragaš, Jelena, Kucharczykova, Barbara, Kersner, Zbznek, Ignjatović, Ivan, Komljenović, Miroslav, Nikolić, Violeta, "Fracture Behaviour of Geopolymer Mortars Reinforced with Hemp Fibres" in fib 2018 - Better, Smarter, Stronger (2018),
https://hdl.handle.net/21.15107/rcub_grafar_1587 .

TY  - CONF
AU  - Simonova, Hana
AU  - Kucharczykova, Barbara
AU  - Topolar, Libor
AU  - Kersner, Zbynek
AU  - Merta, Ildiko
AU  - Dragaš, Jelena
AU  - Ignjatović, Ivan
AU  - Komljenović, Miroslav
AU  - Nikolić, Violeta
PY  - 2018
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/970
AB  - The aim of this paper is to quantify particularly fracture properties of selected types of mortars prepared with an alkali activated binder and hemp fibers. The main attention is focused on evaluation of three-point bending fracture tests of prismatic specimens with an initial central edge notch made of alkali activated fly ash mortars. The load versus crack mouth opening displacement (F-CMOD) diagrams were recorded during the fracture tests and subsequently evaluated using the Double-K fracture model. This model allows the quantification of two different levels of crack propagation: initiation, which corresponds to the beginning of stable crack growth, and the level of unstable crack propagation. The course of fracture tests was also monitored by acoustic emission method.
C3  - Ecf22 - Loading and Environmental Effects On Structural Integrity
T1  - Crack initiation of selected geopolymer mortars with hemp fibers
EP  - 583
SP  - 578
VL  - 13
DO  - 10.1016/j.prostr.2018.12.095
ER  - 

@conference{
author = "Simonova, Hana and Kucharczykova, Barbara and Topolar, Libor and Kersner, Zbynek and Merta, Ildiko and Dragaš, Jelena and Ignjatović, Ivan and Komljenović, Miroslav and Nikolić, Violeta",
year = "2018",
abstract = "The aim of this paper is to quantify particularly fracture properties of selected types of mortars prepared with an alkali activated binder and hemp fibers. The main attention is focused on evaluation of three-point bending fracture tests of prismatic specimens with an initial central edge notch made of alkali activated fly ash mortars. The load versus crack mouth opening displacement (F-CMOD) diagrams were recorded during the fracture tests and subsequently evaluated using the Double-K fracture model. This model allows the quantification of two different levels of crack propagation: initiation, which corresponds to the beginning of stable crack growth, and the level of unstable crack propagation. The course of fracture tests was also monitored by acoustic emission method.",
journal = "Ecf22 - Loading and Environmental Effects On Structural Integrity",
title = "Crack initiation of selected geopolymer mortars with hemp fibers",
pages = "583-578",
volume = "13",
doi = "10.1016/j.prostr.2018.12.095"
}

Simonova, H., Kucharczykova, B., Topolar, L., Kersner, Z., Merta, I., Dragaš, J., Ignjatović, I., Komljenović, M.,& Nikolić, V.. (2018). Crack initiation of selected geopolymer mortars with hemp fibers. in Ecf22 - Loading and Environmental Effects On Structural Integrity, 13, 578-583.
https://doi.org/10.1016/j.prostr.2018.12.095

Simonova H, Kucharczykova B, Topolar L, Kersner Z, Merta I, Dragaš J, Ignjatović I, Komljenović M, Nikolić V. Crack initiation of selected geopolymer mortars with hemp fibers. in Ecf22 - Loading and Environmental Effects On Structural Integrity. 2018;13:578-583.
doi:10.1016/j.prostr.2018.12.095 .

Simonova, Hana, Kucharczykova, Barbara, Topolar, Libor, Kersner, Zbynek, Merta, Ildiko, Dragaš, Jelena, Ignjatović, Ivan, Komljenović, Miroslav, Nikolić, Violeta, "Crack initiation of selected geopolymer mortars with hemp fibers" in Ecf22 - Loading and Environmental Effects On Structural Integrity, 13 (2018):578-583,
https://doi.org/10.1016/j.prostr.2018.12.095 . .

TY  - CONF
AU  - Ignjatović, Ivan
AU  - Komljenović, Miroslav
AU  - Dragaš, Jelena
PY  - 2017
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/1548
PB  - Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd
C3  - Zbornik radova / Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija [u okviru XXVII kongresa Društva za ispitivanje i istraživanje materijala i konstrukcija (DIMK) Srbije], Vršac, 1
T1  - Alkalno aktivirani materijali na bazi domaćih nusproizvoda: fizičko-mehanička svojstva i prirodna radioaktivnost
EP  - 462
SP  - 453
UR  - https://hdl.handle.net/21.15107/rcub_grafar_1548
ER  - 

@conference{
author = "Ignjatović, Ivan and Komljenović, Miroslav and Dragaš, Jelena",
year = "2017",
publisher = "Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd",
journal = "Zbornik radova / Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija [u okviru XXVII kongresa Društva za ispitivanje i istraživanje materijala i konstrukcija (DIMK) Srbije], Vršac, 1",
title = "Alkalno aktivirani materijali na bazi domaćih nusproizvoda: fizičko-mehanička svojstva i prirodna radioaktivnost",
pages = "462-453",
url = "https://hdl.handle.net/21.15107/rcub_grafar_1548"
}

Ignjatović, I., Komljenović, M.,& Dragaš, J.. (2017). Alkalno aktivirani materijali na bazi domaćih nusproizvoda: fizičko-mehanička svojstva i prirodna radioaktivnost. in Zbornik radova / Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija [u okviru XXVII kongresa Društva za ispitivanje i istraživanje materijala i konstrukcija (DIMK) Srbije], Vršac, 1
Društvo za ispitivanje i istraživanje materijala i konstrukcija Srbije, Beograd., 453-462.
https://hdl.handle.net/21.15107/rcub_grafar_1548

Ignjatović I, Komljenović M, Dragaš J. Alkalno aktivirani materijali na bazi domaćih nusproizvoda: fizičko-mehanička svojstva i prirodna radioaktivnost. in Zbornik radova / Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija [u okviru XXVII kongresa Društva za ispitivanje i istraživanje materijala i konstrukcija (DIMK) Srbije], Vršac, 1. 2017;:453-462.
https://hdl.handle.net/21.15107/rcub_grafar_1548 .

Ignjatović, Ivan, Komljenović, Miroslav, Dragaš, Jelena, "Alkalno aktivirani materijali na bazi domaćih nusproizvoda: fizičko-mehanička svojstva i prirodna radioaktivnost" in Zbornik radova / Međunarodni simpozijum o istraživanjima i primeni savremenih dostignuća u građevinarstvu u oblasti materijala i konstrukcija [u okviru XXVII kongresa Društva za ispitivanje i istraživanje materijala i konstrukcija (DIMK) Srbije], Vršac, 1 (2017):453-462,
https://hdl.handle.net/21.15107/rcub_grafar_1548 .