| Title | Combination of LCA and circularity index for assessment of environmental impact of recycled aggregate concrete |
|---|---|
| ID_Doc | 23936 |
| Authors | Kadawo, A; Sadagopan, M; During, O; Bolton, K; Nagy, A |
| Title | Combination of LCA and circularity index for assessment of environmental impact of recycled aggregate concrete |
| Year | 2021 |
| Published | |
| 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. |
| https://doi.org/10.1080/21650373.2021.2004562 |
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