| Title | Carbon footprint accounting across the construction waste lifecycle: A critical review of research |
|---|---|
| ID_Doc | 20346 |
| Authors | Yuan, L; Yang, B; Lu, WS; Peng, ZY |
| Title | Carbon footprint accounting across the construction waste lifecycle: A critical review of research |
| Year | 2024 |
| Published | |
| Abstract | Traditionally, construction waste management researchers have been less interested in carbon emissions, as the construction waste they deal with is largely solid and visible while carbon emissions are opposite. However, this situation has gradually changed, as carbon footprint quantification in construction waste allows for performance benchmarking with other circular economy initiatives. This study presents the first systematic review of construction waste-related carbon emission accounting methods. By analysing 108 journal articles, the review identified seven types of activities (e.g., generation, transportation, sorting, reusing, recycling, landfilling, and incineration) contributing to carbon emissions across the construction waste lifecycle. They encompass four types of emission-producing unit processes: mechanical operation, manual operation, chemical reaction, and material replacement. Each has a distinct emission accounting formula, but follows a generalized principle "Emission per unit x Unit". Also, existing studies exhibit five evolution trends in this research field: shifting from single-stage accounting to lifecycle assessment; from simple calculation to complex conversion; from projectscale to urban-scale emission investigation and management; from accounting exercises to policy implication; and from carbon accounting to mitigation strategies. Moreover, the review sheds light on three future research directions: the need for generalisable lifecycle emission quantification frameworks, comparisons of the carbon reduction potential among various waste disposal technologies, and consideration of cost analysis into carbon emission quantification. This study contributes to the development of sustainable construction waste management strategies aligned with the goals of the circular economy and carbon neutrality. |
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