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Combination of LCA and circularity index for assessment of environmental impact of recycled aggregate concrete.
- Source :
- Journal of Sustainable Cement-Based Materials; Jan2023, Vol. 12 Issue 1, p1-12, 12p
- Publication Year :
- 2023
-
Abstract
- 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. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 21650373
- Volume :
- 12
- Issue :
- 1
- Database :
- Complementary Index
- Journal :
- Journal of Sustainable Cement-Based Materials
- Publication Type :
- Academic Journal
- Accession number :
- 160849080
- Full Text :
- https://doi.org/10.1080/21650373.2021.2004562