文献类型：期刊文献

英文题名：Stocks and flows of sand, gravel, and crushed stone in China (1978-2018): Evidence of the peaking and structural transformation of supply and demand

作者：Ren, Zijian[1,2];Jiang, Meng[1,3];Chen, Dingjiang[1,2];Yu, Yadong[4];Li, Fei[5];Xu, Ming[6,7];Bringezu, Stefan[8];Zhu, Bing[1,2,9]

机构：[1]Tsinghua Univ, Dept Chem Engn, Beijing 100084, Peoples R China;[2]Tsinghua Univ, Inst Circular Econ, Beijing 100084, Peoples R China;[3]Norwegian Univ Sci & Technol NTNU, Dept Energy & Proc Engn, N-7495 Trondheim, Norway;[4]East China Univ Sci & Technol, Sch Business, Shanghai 200237, Peoples R China;[5]Beijing Univ Civil Engn & Architecture, Sch Civil & Transportat Engn, Beijing 100044, Peoples R China;[6]Univ Michigan, Sch Environm & Sustainabil, Ann Arbor, MI 48109 USA;[7]Univ Michigan, Dept Civil & Environm Engn, Ann Arbor, MI 48109 USA;[8]Univ Kassel, Ctr Environm Syst Res, D-34109 Kassel, Germany;[9]IIASA, Energy Climate & Environm Program, Schlosspl 1, A-2361 Laxenburg, Austria

年份：2022

卷号：180

外文期刊名：RESOURCES CONSERVATION AND RECYCLING

收录：;EI(收录号：20220411494527);WOS:【SSCI(收录号:WOS:000774320100004)，SCI-EXPANDED(收录号:WOS:000774320100004)】；

基金：Acknowledgments The authors would like to acknowledge the support of the National Natural Science Foundation of China Grant (41661144023) . We thank Prof. Youyi Hu, the President of the China Aggregates Association, for advice in synthesizing the research.

语种：英文

外文关键词：Sand and gravel; Construction aggregates; Material flow analysis; Social metabolism; Driving force; China

摘要：Aggregates are the most extracted material resources by weight worldwide. As an important resource for buildings and infrastructure, aggregates, however, are now facing shortages and are associated with negative environmental and social impacts. More attention is now paid to the sand and gravel issues, however, recent investigations are often found ambiguous in definition or adopting over-simplified accounting methodology. To bridge the knowledge gap, first, we conducted a detailed literature investigation to clarify the associated terms. Then we established a systematic material flow and stock accounting framework to map the social metabolism of aggregate resources for the largest aggregates consumer and producer-China. Our results show during 1978-2018, the inflows of China's aggregates increased by 13 times (1.3 to 17.3 billion tons) and the stocks increased by 15 times (18.3 to 285.5 billion tons). We observed both aggregate inflows and stocks have shown a relative decoupling from economic growth. Around 2014, inflows entered a platform area and the dominated consuming sector shifted from buildings to infrastructure. Due to supply shortages and policy interventions, the source of primary supply sees a sustainable transition: manufactured aggregates (instead of natural aggregates) gradually dominated, accounting for 78% of the total primary supply in 2018. Additionally, regarding accumulated stocks of aggregates, it is expected to see rapid growth of aggregate waste in the near future. It is essential to foster a well-functioned circular system to achieve the sustainable development of the aggregate industry.