The role of service life in Life Cycle Assessment of concrete structures
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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.
Кључне речи:
Concrete structure / Service life / LCA / Environmental impact / Integrated assessmentИзвор:
Journal of Cleaner Production, 2020, 290, 125610-Издавач:
- Elsevier Ltd
Финансирање / пројекти:
- Истраживање могућности примене отпадних и рециклираних материјала у бетонским композитима, са оценом утицаја на животну средину, у циљу промоције одрживог грађевинарства у србији (RS-MESTD-Technological Development (TD or TR)-36017)
DOI: 10.1016/j.jclepro.2020.125610
ISSN: 0959-6526
WoS: 000620275100008
Scopus: 2-s2.0-85099503766
Колекције
Институција/група
GraFarTY - 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 . .