Combination of LCA and circularity index for assessment of environmental impact of recycled aggregate concreteVisa övriga samt affilieringar
2023 (Engelska)Ingår i: Journal of Sustainable Cement-Based Materials, ISSN 2165-0373, E-ISSN 2165-0381, Vol. 12, nr 1Artikel i tidskrift (Refereegranskat) Published
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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.
Ort, förlag, år, upplaga, sidor
2023. Vol. 12, nr 1
Nyckelord [en]
Concrete recycling, recycled aggregate, LCA, circular economy, sustainability, LIFE-CYCLE ASSESSMENT, HYDRATED CEMENT
Nationell ämneskategori
Byggproduktion Naturresursteknik
Identifikatorer
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
Anmärkning
Times Cited in Web of Science Core Collection: 0 Total Times Cited: 0 Cited Reference Count: 38
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