An analytical framework of zero waste construction site: Two case studies of Shenzhen, China

Around the global construction industry, there is an emerging trend to pursue a zero-waste goal at the site level, but little is known about it. This paper aims to shed insights on the waste management concept of zero waste construction site by delineating its meaning, system boundary, assessment period, and operation strategies, which are further formulated in an analytical framework. Owing to the nascent nature of the concept, we adopted a qualitative approach including archival study, a series of semi structured interviews, and two in-depth case studies in Shenzhen, China to sketch the analytical framework. Meanwhile, an analogy between zero waste construction site and net zero building is continuously made to fine-tune and finalize the framework. This research demonstrates that the zero-waste goal is challenging but achievable on individual construction sites. The system boundary to examine the zero-waste goal is contingent on the project scope, be it a new construction, renovation, or demolition project. The assessment period is dependent on the duration of the construction project. However, it would be too costly, if not entirely impossible, to achieve a zero waste construction site by treating it as a closed system. Rather, one needs to consider open, off-site strategies, e.g., engaging third-party recycling services, reusing recycled materials in subsequent projects, or trading it in to a recycled material market. The analytical framework can be utilized to scrutinize existing construction waste management practices. In the long term, the research will contribute positively to a zero waste society. (c) 2020 Elsevier Ltd. All rights reserved.

Automated summary

This paper discusses the concept, boundaries, assessment period, and operation strategies of zero waste construction sites, and establishes an analytical framework through case studies. It points out that achieving the zero-waste goal on individual construction sites is challenging but feasible, requiring consideration of open, off-site strategies.