TY  - JOUR
AU  - Dragaš, Jelena
AU  - Ignjatović, Ivan
AU  - Tošić, Nikola
AU  - Marinković, Snežana
PY  - 2016
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/799
AB  - A two-phase experimental study on the effect of simultaneous partial replacement of cement and fine aggregate with fly ash on the mechanical and time-dependent properties of high-volume fly ash concrete (HVFAC) is presented. The results of the first phase of the study show that it is possible to make structural grade HVFAC with 50% of cement and an additional 30% of fine aggregate replacement that has a similar compressive strength to that of the control cement concrete and with adequate workability. In the second phase of the study the mechanical and time-dependent properties of HVFAC with a mass of fly ash of 50-70% of the total mass of cementitious materials were tested. The results show that with the increase in fly ash content the compressive strength of HVFAC increased by 22% on average at all ages tested. With the exception of the early-age compressive strength, it was found that the European standard EN 1992-1-1:2004 provisions for ordinary cement concrete underestimate the mechanical properties and significantly overestimate the shrinkage and creep of HVFAC. Better correlation with experimental results was obtained using different coefficients developed for HVFAC.
PB  - ICE Publishing
T2  - Magazine of Concrete Research
T1  - Mechanical and time-dependent properties of high-volume fly ash concrete for structural use
EP  - 645
IS  - 12
SP  - 632
VL  - 68
DO  - 10.1680/jmacr.15.00384
ER  - 

@article{
author = "Dragaš, Jelena and Ignjatović, Ivan and Tošić, Nikola and Marinković, Snežana",
year = "2016",
abstract = "A two-phase experimental study on the effect of simultaneous partial replacement of cement and fine aggregate with fly ash on the mechanical and time-dependent properties of high-volume fly ash concrete (HVFAC) is presented. The results of the first phase of the study show that it is possible to make structural grade HVFAC with 50% of cement and an additional 30% of fine aggregate replacement that has a similar compressive strength to that of the control cement concrete and with adequate workability. In the second phase of the study the mechanical and time-dependent properties of HVFAC with a mass of fly ash of 50-70% of the total mass of cementitious materials were tested. The results show that with the increase in fly ash content the compressive strength of HVFAC increased by 22% on average at all ages tested. With the exception of the early-age compressive strength, it was found that the European standard EN 1992-1-1:2004 provisions for ordinary cement concrete underestimate the mechanical properties and significantly overestimate the shrinkage and creep of HVFAC. Better correlation with experimental results was obtained using different coefficients developed for HVFAC.",
publisher = "ICE Publishing",
journal = "Magazine of Concrete Research",
title = "Mechanical and time-dependent properties of high-volume fly ash concrete for structural use",
pages = "645-632",
number = "12",
volume = "68",
doi = "10.1680/jmacr.15.00384"
}

Dragaš, J., Ignjatović, I., Tošić, N.,& Marinković, S.. (2016). Mechanical and time-dependent properties of high-volume fly ash concrete for structural use. in Magazine of Concrete Research
ICE Publishing., 68(12), 632-645.
https://doi.org/10.1680/jmacr.15.00384

Dragaš J, Ignjatović I, Tošić N, Marinković S. Mechanical and time-dependent properties of high-volume fly ash concrete for structural use. in Magazine of Concrete Research. 2016;68(12):632-645.
doi:10.1680/jmacr.15.00384 .

Dragaš, Jelena, Ignjatović, Ivan, Tošić, Nikola, Marinković, Snežana, "Mechanical and time-dependent properties of high-volume fly ash concrete for structural use" in Magazine of Concrete Research, 68, no. 12 (2016):632-645,
https://doi.org/10.1680/jmacr.15.00384 . .

TY  - CONF
AU  - Marinković, Snežana
AU  - Habert, G.
AU  - Ignjatović, Ivan
AU  - Dragaš, Jelena
AU  - Tošić, Nikola
AU  - Brumaud, C.
PY  - 2016
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/740
AB  - This paper presents a part of the results obtained within the frame of the SCOPES joint research project - a scientific collaboration between ETH Zurich and Faculty of Civil Engineering, University of Belgrade. One of the goals of the project was to produce recycled aggregate concrete with fly ash as partial cement replacement, which would have mechanical and durability-related properties adequate for structural concrete. At the same time the aim was to replace as much as possible natural resources with waste materials to achieve environmental and cost efficiency. Three mixtures of recycled aggregate concrete were designed with percentages of cement replacement with fly ash equal to 0%, 19% and 38%. Equal compressive strength was set as the design goal and environmental impact assessment was based on that fact. The results of these tests showed that it was possible to reach the same 28-day compressive strength for all three concretes with established mix design procedures. The environmental impacts of the tested concretes types were assessed using the standardized methodology of Life cycle assessment (LCA). The assessment was based mostly on local LCI data and on typical conditions in Serbia. Regarding the impact of fly ash, three different allocation procedures were tested: 'no-allocation', 'mass allocation' and 'economic allocation'. Comparative environmental assessment showed that environmental benefits from replacing a part of the cement with fly ash could be gained in the 'no-allocation' and the ' economic allocation' case. In the case of 'mass allocation', all calculated environmental impacts were higher for recycled aggregate concrete with fly ash.
C3  - Expanding Boundaries: Systems Thinking in the Built Environment
T1  - Life cycle analysis of recycled aggregate concrete with fly ash as partial cement replacement
EP  - 396
SP  - 390
UR  - https://hdl.handle.net/21.15107/rcub_grafar_740
ER  - 

@conference{
author = "Marinković, Snežana and Habert, G. and Ignjatović, Ivan and Dragaš, Jelena and Tošić, Nikola and Brumaud, C.",
year = "2016",
abstract = "This paper presents a part of the results obtained within the frame of the SCOPES joint research project - a scientific collaboration between ETH Zurich and Faculty of Civil Engineering, University of Belgrade. One of the goals of the project was to produce recycled aggregate concrete with fly ash as partial cement replacement, which would have mechanical and durability-related properties adequate for structural concrete. At the same time the aim was to replace as much as possible natural resources with waste materials to achieve environmental and cost efficiency. Three mixtures of recycled aggregate concrete were designed with percentages of cement replacement with fly ash equal to 0%, 19% and 38%. Equal compressive strength was set as the design goal and environmental impact assessment was based on that fact. The results of these tests showed that it was possible to reach the same 28-day compressive strength for all three concretes with established mix design procedures. The environmental impacts of the tested concretes types were assessed using the standardized methodology of Life cycle assessment (LCA). The assessment was based mostly on local LCI data and on typical conditions in Serbia. Regarding the impact of fly ash, three different allocation procedures were tested: 'no-allocation', 'mass allocation' and 'economic allocation'. Comparative environmental assessment showed that environmental benefits from replacing a part of the cement with fly ash could be gained in the 'no-allocation' and the ' economic allocation' case. In the case of 'mass allocation', all calculated environmental impacts were higher for recycled aggregate concrete with fly ash.",
journal = "Expanding Boundaries: Systems Thinking in the Built Environment",
title = "Life cycle analysis of recycled aggregate concrete with fly ash as partial cement replacement",
pages = "396-390",
url = "https://hdl.handle.net/21.15107/rcub_grafar_740"
}

Marinković, S., Habert, G., Ignjatović, I., Dragaš, J., Tošić, N.,& Brumaud, C.. (2016). Life cycle analysis of recycled aggregate concrete with fly ash as partial cement replacement. in Expanding Boundaries: Systems Thinking in the Built Environment, 390-396.
https://hdl.handle.net/21.15107/rcub_grafar_740

Marinković S, Habert G, Ignjatović I, Dragaš J, Tošić N, Brumaud C. Life cycle analysis of recycled aggregate concrete with fly ash as partial cement replacement. in Expanding Boundaries: Systems Thinking in the Built Environment. 2016;:390-396.
https://hdl.handle.net/21.15107/rcub_grafar_740 .

Marinković, Snežana, Habert, G., Ignjatović, Ivan, Dragaš, Jelena, Tošić, Nikola, Brumaud, C., "Life cycle analysis of recycled aggregate concrete with fly ash as partial cement replacement" in Expanding Boundaries: Systems Thinking in the Built Environment (2016):390-396,
https://hdl.handle.net/21.15107/rcub_grafar_740 .