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The role of service life in Life Cycle Assessment of concrete structures

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2020
Manuscript.pdf (809.1Kb)
Authors
Marinković, Snežana
Carević, Vedran
Dragaš, Jelena
Article (Accepted Version)
,
Elsevier Ltd.
Metadata
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Abstract
In comparative Life Cycle Assessment (LCA) of concrete structures it is of crucial importance to provide the functional equivalence of compared alternatives. Most commonly, the comparison is performed between the structures made of conventional and green concrete mixtures. Since they have different mechanical and durability properties, corresponding structures have different strength and service life. While resolving this problem, two approaches are generally possible: either correction of the functional unit volume or correction of the calculated environmental impacts with compressive strength and duration of service life, if functional unit has the same volume. In this work, in order to assess the effect of service life modeling in LCA, both approaches were tested. As a demonstration, comparison of both slabs and beams made of conventional and high volume fly ash concrete exposed to carbonation was carried out. LCA was performed for 94 different mixtures from reported experimental re...search and calculated environmental impacts (climate change, acidification, eutrophication, photochemical-oxidant creation, and abiotic depletion of fossil fuels) for both approaches were compared. Results showed that different modeling of service life in LCA can result in totally different, even opposite conclusions. With slightly larger volume of functional unit (7%–20%), all normalized environmental impacts of high volume fly ash concrete structural members were lower for an order of magnitude (6–7 times) compared to those obtained on the basis of the same volume approach. Therefore, drawing conclusions only on the basis of service life modeling with the same volume approach may be misleading. The proper choice of the best alternative should be based on the integrated assessment which includes structural, environmental and cost assessment of the structure as a whole.

Keywords:
Concrete structure / Service life / LCA / Environmental impact / Integrated assessment
Source:
Journal of Cleaner Production, 2020, 290, 125610-
Publisher:
  • Elsevier Ltd
Funding / projects:
  • Utilization of by-products and recycled waste materials in concrete composites in the scope of sustainable construction development in Serbia: investigation and environmental assessment of possible applications (RS-36017)

DOI: 10.1016/j.jclepro.2020.125610

WoS: 000620275100008

Scopus: 2-s2.0-85099503766
[ Google Scholar ]
19
2
URI
https://grafar.grf.bg.ac.rs/handle/123456789/2232
Collections
  • Катедра за материјале и конструкције
Institution/Community
GraFar
TY  - JOUR
AU  - Marinković, Snežana
AU  - Carević, Vedran
AU  - Dragaš, Jelena
PY  - 2020
UR  - https://grafar.grf.bg.ac.rs/handle/123456789/2232
AB  - In comparative Life Cycle Assessment (LCA) of concrete structures it is of crucial importance to provide the functional equivalence of compared alternatives. Most commonly, the comparison is performed between the structures made of conventional and green concrete mixtures. Since they have different mechanical and durability properties, corresponding structures have different strength and service life. While resolving this problem, two approaches are generally possible: either correction of the functional unit volume or correction of the calculated environmental impacts with compressive strength and duration of service life, if functional unit has the same volume. In this work, in order to assess the effect of service life modeling in LCA, both approaches were tested. As a demonstration, comparison of both slabs and beams made of conventional and high volume fly ash concrete exposed to carbonation was carried out. LCA was performed for 94 different mixtures from reported experimental research and calculated environmental impacts (climate change, acidification, eutrophication, photochemical-oxidant creation, and abiotic depletion of fossil fuels) for both approaches were compared. Results showed that different modeling of service life in LCA can result in totally different, even opposite conclusions. With slightly larger volume of functional unit (7%–20%), all normalized environmental impacts of high volume fly ash concrete structural members were lower for an order of magnitude (6–7 times) compared to those obtained on the basis of the same volume approach. Therefore, drawing conclusions only on the basis of service life modeling with the same volume approach may be misleading. The proper choice of the best alternative should be based on the integrated assessment which includes structural, environmental and cost assessment of the structure as a whole.
PB  - Elsevier Ltd
T2  - Journal of Cleaner Production
T1  - The role of service life in Life Cycle Assessment of concrete structures
SP  - 125610
VL  - 290
DO  - 10.1016/j.jclepro.2020.125610
ER  - 
@article{
author = "Marinković, Snežana and Carević, Vedran and Dragaš, Jelena",
year = "2020",
abstract = "In comparative Life Cycle Assessment (LCA) of concrete structures it is of crucial importance to provide the functional equivalence of compared alternatives. Most commonly, the comparison is performed between the structures made of conventional and green concrete mixtures. Since they have different mechanical and durability properties, corresponding structures have different strength and service life. While resolving this problem, two approaches are generally possible: either correction of the functional unit volume or correction of the calculated environmental impacts with compressive strength and duration of service life, if functional unit has the same volume. In this work, in order to assess the effect of service life modeling in LCA, both approaches were tested. As a demonstration, comparison of both slabs and beams made of conventional and high volume fly ash concrete exposed to carbonation was carried out. LCA was performed for 94 different mixtures from reported experimental research and calculated environmental impacts (climate change, acidification, eutrophication, photochemical-oxidant creation, and abiotic depletion of fossil fuels) for both approaches were compared. Results showed that different modeling of service life in LCA can result in totally different, even opposite conclusions. With slightly larger volume of functional unit (7%–20%), all normalized environmental impacts of high volume fly ash concrete structural members were lower for an order of magnitude (6–7 times) compared to those obtained on the basis of the same volume approach. Therefore, drawing conclusions only on the basis of service life modeling with the same volume approach may be misleading. The proper choice of the best alternative should be based on the integrated assessment which includes structural, environmental and cost assessment of the structure as a whole.",
publisher = "Elsevier Ltd",
journal = "Journal of Cleaner Production",
title = "The role of service life in Life Cycle Assessment of concrete structures",
pages = "125610",
volume = "290",
doi = "10.1016/j.jclepro.2020.125610"
}
Marinković, S., Carević, V.,& Dragaš, J.. (2020). The role of service life in Life Cycle Assessment of concrete structures. in Journal of Cleaner Production
Elsevier Ltd., 290, 125610.
https://doi.org/10.1016/j.jclepro.2020.125610
Marinković S, Carević V, Dragaš J. The role of service life in Life Cycle Assessment of concrete structures. in Journal of Cleaner Production. 2020;290:125610.
doi:10.1016/j.jclepro.2020.125610 .
Marinković, Snežana, Carević, Vedran, Dragaš, Jelena, "The role of service life in Life Cycle Assessment of concrete structures" in Journal of Cleaner Production, 290 (2020):125610,
https://doi.org/10.1016/j.jclepro.2020.125610 . .

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