Estimating construction and demolition waste in the building sector in China: Towards the end of the century

IF 7.1 2区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Waste management Pub Date : 2024-10-04 DOI:10.1016/j.wasman.2024.09.023

Runying An , Yangyang Guo

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引用次数: 0

Abstract

Amid China’s rapid urbanization and economic growth, increasing construction and demolition waste (CDW) has become a critical environmental and management challenge. In the present study, we introduce a dynamic recursive-based CDW assessment model designed to systematically track and analyze the origins, distribution, and composition of CDW across China. Our results show that China is projected to generate 224.08 billion tonnes (Bt) of CDW from 2000 to 2100, mostly gravel (34.15%), sand (30.08%), and brick/tile (14.37%). Additionally, the primary source of CDW generation will shift from rural to urban public and commercial (P&C) buildings. The proportion of metals such as steel in CDW is rapidly increasing, rising from 2.11% in 2000 to 17.66% in 2100. From 2020 to 2100, reducing material waste during the construction phase can decrease the amount of CDW by 6.88 Bt. Extending the building lifespan during the operation phase can further reduce the amount of CDW by 50.25 Bt. In comparison, implementing recycling strategies during the demolition phase can achieve the most significant reduction in the amount of CDW, with an estimated cumulative decrease of 151.25 Bt. The amounts of gravel, sand, and steel are anticipated to contribute the most to this reduction, accounting for 44.93%, 37.66%, and 8.8% of the total reduction in the amount of CDW, respectively.

查看原文本刊更多论文

估算中国建筑行业的建筑和拆除垃圾：迈向世纪末。

在中国快速的城市化和经济增长中，不断增加的建筑和拆除垃圾（CDW）已成为一项严峻的环境和管理挑战。在本研究中，我们引入了基于动态递归的建筑垃圾处置量评估模型，旨在系统地跟踪和分析中国各地建筑垃圾处置量的来源、分布和构成。结果表明，预计从 2000 年到 2100 年，中国将产生 2240.8 亿吨（Bt）的煤炭废弃物，其中大部分是砾石（34.15%）、砂（30.08%）和砖瓦（14.37%）。此外，产生国内煤炭消费量的主要来源将从农村转移到城市公共和商业建筑。钢材等金属在煤层气中的比例正在迅速增加，从 2000 年的 2.11% 增加到 2100 年的 17.66%。从 2020 年到 2100 年，减少施工阶段的材料浪费可减少 6.88 亿吨的厨余垃圾。在运营阶段延长建筑寿命可进一步减少 50.25 Bt 的 CDW 量。相比之下，在拆除阶段实施回收战略可实现最显著的固体废弃物量减少，预计累计减少 151.25 Bt。预计碎石、沙子和钢材的用量对减少总量的贡献最大，分别占减少总量的44.93%、37.66%和8.8%。

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来源期刊

Waste management 环境科学-工程：环境

CiteScore

15.60

自引率

6.20%

发文量

492

审稿时长

39 days

期刊介绍： Waste Management is devoted to the presentation and discussion of information on solid wastes,it covers the entire lifecycle of solid. wastes. Scope: Addresses solid wastes in both industrialized and economically developing countries Covers various types of solid wastes, including: Municipal (e.g., residential, institutional, commercial, light industrial) Agricultural Special (e.g., C and D, healthcare, household hazardous wastes, sewage sludge)