Department of Civil Engineering, Xi'an Jiaotong-Liverpool University, 111 Ren'ai Road, Suzhou Industrial Park, Suzhou, 215123, China.
Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, Canada.
Environ Sci Pollut Res Int. 2021 May;28(19):24499-24510. doi: 10.1007/s11356-020-09026-2. Epub 2020 May 1.
Due to the rapid pace of urbanization in China, there has been a significant increase in construction work, which has resulted in the generation of more waste. Reducing the waste at source is the most efficient way to reduce its negative impacts, and prefabrication is a construction method that does exactly that. Since prefabricated construction generates less waste compared to conventional cast-in-situ construction, it is being promoted by the Chinese government. This study investigates the benefits of prefabrication and quantifies the percentage of construction waste reduction through its application in China. It does so by using a 26-storey concrete-brick residential building as a case study, and by conducting uncertainty analysis with Oracle Crystal Ball simulation software to assess the reduction of waste when using prefabricated components in place of cast-in-situ elements. Simulation results demonstrated that the waste generation rate for in-situ timber formwork and masonry work was 10.52 and 4.77 kg/m respectively, and that the use of prefabricated components reduced those figures by 36.04% and 25.53% respectively. This study quantifies the benefits of prefabrication as a method for reducing the generation of construction waste in China. Not only would extensive use of prefabrication decrease the cost related to construction waste management in China, but it could also mitigate the environmental and social impacts of construction waste globally.
由于中国城市化进程的快速发展，建筑工程的数量显著增加，从而产生了更多的废弃物。在源头减少废弃物是降低其负面影响的最有效方法，而预制是一种能够做到这一点的施工方法。由于与传统的现浇施工相比，预制施工产生的废弃物更少，因此受到了中国政府的大力推广。本研究调查了预制的好处，并通过在中国的应用量化了减少建筑废弃物的百分比。研究使用一栋 26 层的混凝土砌块住宅建筑作为案例研究，并使用 Oracle Crystal Ball 模拟软件进行不确定性分析，以评估在使用预制构件替代现浇构件时减少废弃物的情况。模拟结果表明，现浇木模板和砌体工程的废弃物产生率分别为 10.52kg/m 和 4.77kg/m，而使用预制构件可分别减少 36.04%和 25.53%。本研究量化了预制作为减少中国建筑废弃物产生的方法的好处。预制的广泛应用不仅可以降低中国建筑废弃物管理的成本，还可以减轻全球建筑废弃物对环境和社会的影响。
