基于生命周期理论的再生混凝土空心砌块环境性能评价  

Environment performance assessment of recycled concrete hollow blocks based on life-cycle theory

作　　者：李承明[1] 孔祥坤 熊宇强 柏睿 涂安 郭樟根[2] LI Chengming;KONG Xiangkun;XIONG Yuqiang;BAI Rui;TU An;GUO Zhanggen(Jiangsu Han Construction Group,Yangzhou 225127,China;College of Civil Engineering,Nanjing Tech University,Nanjing 210000,China)

机构地区：[1]江苏邗建集团有限公司,江苏扬州225127 [2]南京工业大学土木工程学院,江苏南京210000

出　　处：《新型建筑材料》2021年第1期112-115,120,共5页New Building Materials

摘　　要：采用生命周期评价方法(LCA),对南京一实际工程的再生混凝土空心砌块生命周期的环境影响进行了评价和分析。建立了再生混凝土空心砌块生产过程中9种污染物的排放清单;计算了再生混凝土空心砌块的5种环境影响类型参数(温室效应、环境酸化、人体健康损害、富营养化、光化学烟雾);利用归一化模型计算分析了不同环境影响类型所占比重。在此基础上,分析了再生骨料等原材料获取和生产、材料运输、砌块制作等对环境排放的影响。结果表明:再生混凝土空心砌块的5种环境影响参数均比普通混凝土空心砌块小,使用再生骨料制作混凝土空心砌块可以有效降低混凝土空心砌块的环境排放,改善其环境性能。推广应用再生混凝土空心砌块可以有效提升砌体结构的可持续发展能力。Using life-cycle assessment(LCA)method,the environmental impact of concrete blocks prepared with recycled con-crete aggregate(RCA)in an actual case in Nanjing was investigated.The emission inventory of nine pollutants in the production of recycled aggregate concrete(RAC)block was determined.Five different environmental impact categories(GWP,AP,EP,HTP,POCP)of the recycled concrete hollow blocks are calculated,and the normalized model is used to calculate and analyze the proportions of different environmental impact categories.The effect of RCAs on the environmental impact of RAC blocks was studied as well as the transportation processes and the production of blocks in the plant.The results indicate that RAC blocks have less environmental impact compared to normal concrete blocks.The use of RAC blocks will significantly improve the sustainable development of masonry structures,improve its environmental performance.The promotion and application of recycled concrete hollow blocks can effectively improve the sustainable development capacity of masonry structures.

关 键 词：再生混凝土 混凝土空心砌块 生命周期清单 环境性能 生命周期评价 

分 类 号：TU365[建筑科学—结构工程]