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Environmental Evaluation of Concrete Containing Recycled and By-Product Aggregates Based on Life Cycle Assessment
Applied Sciences ( IF 2.838 ) Pub Date : 2020-10-26 , DOI: 10.3390/app10217503
Seungjun Roh , Rakhyun Kim , Won-Jun Park , Hoki Ban

This study aims to compare the potential environmental impact of the manufacture and production of recycled and by-product aggregates based on a life cycle assessment and to evaluate the environmental impact and cost when they are used as aggregates in concrete. To this end, the six potential environmental impacts (i.e., abiotic depletion potential, global warming potential, ozone-layer depletion potential, acidification potential, photochemical ozone creation potential, and eutrophication potential) of the manufacture and production of natural sand, natural gravel, recycled aggregate, slag aggregate, bottom ash aggregate, and waste glass aggregate were compared using information from life cycle inventory databases. Additionally, the environmental impacts and cost were evaluated when these aggregates were used to replace 30% of the fine and coarse aggregates in concrete with a design strength of 24 MPa. The environmental impact of concrete that incorporated slag aggregate as the fine aggregates or bottom ash aggregate as the coarse aggregates were lower than that of concrete that incorporated natural aggregate. However, concrete that incorporated bottom ash aggregate as the fine aggregates demonstrated relatively high environmental impacts. Based on these environmental impacts, the environmental cost was found to range from 5.88 to 8.79 USD/m3.

中文翻译:

基于生命周期评估的再生骨料和副产品骨料混凝土环境评价

本研究旨在比较基于生命周期评估的再生骨料和副产品骨料的制造和生产的潜在环境影响,并评估将它们用作混凝土骨料时的环境影响和成本。为此,制造和生产天然砂、天然砾石、天然砂石、天然砂石和其他六种潜在的环境影响(即非生物耗竭潜势、全球变暖潜势、臭氧层耗竭潜势、酸化潜势、光化学臭氧产生潜势和富营养化潜势)。使用生命周期清单数据库中的信息对再生骨料、矿渣骨料、底灰骨料和废玻璃骨料进行了比较。此外,当使用这些骨料替代设计强度为 24 MPa 的混凝土中 30% 的细骨料和粗骨料时,对环境影响和成本进行了评估。掺入矿渣骨料作为细骨料或底灰骨料作为粗骨料的混凝土的环境影响低于掺入天然骨料的混凝土。然而,掺入底灰骨料作为细骨料的混凝土表现出相对较高的环境影响。根据这些环境影响,发现环境成本在 5.88 至 8.79 美元/立方米之间。掺入矿渣骨料作为细骨料或底灰骨料作为粗骨料的混凝土的环境影响低于掺入天然骨料的混凝土。然而,掺入底灰骨料作为细骨料的混凝土表现出相对较高的环境影响。根据这些环境影响,发现环境成本在 5.88 至 8.79 美元/立方米之间。掺入矿渣骨料作为细骨料或底灰骨料作为粗骨料的混凝土的环境影响低于掺入天然骨料的混凝土。然而,掺入底灰骨料作为细骨料的混凝土表现出相对较高的环境影响。根据这些环境影响,发现环境成本在 5.88 至 8.79 美元/立方米之间。
更新日期:2020-10-26
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