College of Civil Engineering, Shenzhen University, NO. 3688 Nanhai Ave, Nanshan district, Shenzhen, 518068, Guangdong, China.
Academic Division of Engineering, Qingdao University of Science & Technology, Qingdao, 266061, China.
Environ Sci Pollut Res Int. 2019 Sep;26(25):25513-25525. doi: 10.1007/s11356-019-05841-4. Epub 2019 Jul 1.
As China and other developing countries continue to urbanize over the next decades, construction and demolition waste (CDW) management has been becoming a significant challenge for urban sustainability in terms of the environment, economy, and safety. However, accurate estimations or statistics of CDW generation are absent from the official national report in spite of their importance to devise sensible interventions to tackle CDW-related problems. This paper examines and compares the applications of three prevailing methods for estimating CDW, including the weight-per-construction-area method (WAM), buildings' life span-based method, and weight-per-capita method. Specifically, China has been chosen as the case study. This study implies that the weight-per-construction-area method is more appropriate because of the data availability and accuracy at a city or national level. The results of WAM indicate that a total of 4.1 billion metric tons (Bt) of CDW were generated in China in 2016, mainly from demolition waste (85%). Taking the changes of buildings' life span into account, a projection analysis reveals that the cumulative CDW generation will be 50 Bt between 2017 and 2040 in China (equal to approximately 38 years cumulative generation of global municipal solid waste). Overall, the findings provide some methodological options for scholars, practitioners, and decision-makers to more accurately estimate the amount of the CDW and to develop a more environmentally sound management strategy.
在未来几十年，随着中国和其他发展中国家继续城市化，建筑和拆除废物（CDW）管理在环境、经济和安全方面对城市可持续性构成了重大挑战。然而，尽管准确估计或统计 CDW 的产生对于制定合理的干预措施以解决与 CDW 相关的问题至关重要，但它们却并未出现在官方的国家报告中。本文研究并比较了三种流行的 CDW 估算方法的应用，包括单位建筑面积重量法（WAM）、建筑物使用寿命法和人均重量法。具体来说，中国被选为案例研究。本研究表明，由于在城市或国家层面上的数据可用性和准确性，单位建筑面积重量法更加适用。WAM 的结果表明，2016 年中国共产生了 41 亿吨 CDW，主要来自拆除废物（85%）。考虑到建筑物使用寿命的变化，预测分析表明，到 2040 年，中国的累计 CDW 产生量将达到 50 亿吨（相当于全球城市固体废物约 38 年的累计产生量）。总体而言，研究结果为学者、从业者和决策者提供了一些方法选择，以便更准确地估计 CDW 的数量，并制定更环保的管理策略。
