Combination of LCA and circularity index for assessment of environmental impact of recycled aggregate concreteShow others and affiliations
2022 (English)In: Journal of Sustainable Cement-Based Materials, ISSN 2165-0373, E-ISSN 2165-0381Article in journal (Refereed) Epub ahead of print
Sustainable development
According to the author(s), the content of this publication falls within the area of sustainable development.
Abstract [en]
Multidisciplinary approach is used to evaluate concrete with recycled concrete aggregates (RCA) from technical, environmental impacts and product circularity perspectives. Two RCA replacements investigated, RAC50: fine aggregates; RAC100: both coarse, fine aggregates. Reference, recycled concretes have same cement content, similar workability and compressive strength requirement, proven experimentally. RCA is sourced from pre-fab element discards of a Swedish plant, the logistical alternatives requiring environmental impact analysis. Alternatives are RCA crushing at plant and crushing at a different location including transportation. LCA shows transportation is second largest contributor after cement in all impact categories. RAC alternatives show lower total impact than reference concrete due to RCA replacement. A circularity index for concrete based on economic value of recirculated aggregates; supplements LCA for sustainability reporting. Circularity index results: RAC100 > RAC50 > RC. Combining circularity index with LCA helps optimize recycling process with regard to amount of recycled material and logistics respectively.
Place, publisher, year, edition, pages
2022.
Keywords [en]
Concrete recycling, recycled aggregate, LCA, circular economy, sustainability, LIFE-CYCLE ASSESSMENT, HYDRATED CEMENT
National Category
Construction Management Environmental Engineering
Identifiers
URN: urn:nbn:se:hb:diva-27666DOI: 10.1080/21650373.2021.2004562ISI: 000743439500001Scopus ID: 2-s2.0-85122887571OAI: oai:DiVA.org:hb-27666DiVA, id: diva2:1646043
Note
Times Cited in Web of Science Core Collection: 0 Total Times Cited: 0 Cited Reference Count: 38
2022-03-212022-03-212023-01-19Bibliographically approved