Department of Structural Eng., College of Civil Eng., Tongji University, Shanghai 200092, PR China.
Department of Structural Eng., College of Civil Eng., Tongji University, Shanghai 200092, PR China; Key Laboratory of Advanced Civil Eng. Materials, Ministry of Education, Shanghai 201804, PR China.
Waste Manag. 2016 Oct;56:367-75. doi: 10.1016/j.wasman.2016.05.031. Epub 2016 Jun 11.
This paper studies the potential environmental impact of recycled coarse aggregate (RCA) for concrete production in China. According to the cradle-to-cradle theory, a closed-loop life cycle assessment (LCA) on recycled aggregate concrete (RAC) utilization in China with entire local life cycle inventory (LCI) is performed, regarding the environmental influence of cement content, aggregate production, transportation and waste landfilling. Special attention is paid on the primary resource and energy conservation, as well as climate protection induced by RAC applications. Environmental impact between natural aggregate concrete (NAC) and RAC are also compared. It is shown that cement proportion and transportation are the top two contributors for carbon dioxide (CO2) emissions and energy consumption for both NAC and RAC. Sensitivity analysis also proves that long delivery distances for natural coarse aggregate (NCA) leave a possible opportunity for lowering environmental impact of RAC in China.
本文研究了再生粗骨料（RCA）在中国混凝土生产中的潜在环境影响。根据从摇篮到摇篮理论，对中国再生骨料混凝土（RAC）的利用进行了全生命周期清单（LCI）的闭环生命周期评估（LCA），考虑了水泥含量、骨料生产、运输和废物填埋的环境影响。特别关注了 RAC 应用所带来的初级资源和能源节约以及气候保护。还比较了天然骨料混凝土（NAC）和 RAC 的环境影响。结果表明，水泥比例和运输是 NAC 和 RAC 二氧化碳（CO2）排放和能源消耗的前两大贡献者。敏感性分析还证明，天然粗骨料（NCA）的长距离运输为降低中国 RAC 的环境影响提供了可能。
