东南大学学报（自然科学版）2016，Vol.46Issue(5)：1088-1092,5.DOI:10.3969/j.issn.1001-0505.2016.05.032
再生混凝土生命周期CO 2排放评价
Life cycle assessment on CO2 emission for recycled aggregate concrete
摘要
Abstract
In order to assess CO2 emission of recycled aggregate concrete (RAC ),a quantitative model for CO2 emission of RAC was proposed.By applying life cycle assessment (LCA)technolo-gy,the computational methods for CO2 emission at the stages of raw material production,transport, preparation of RAC,construction and demolition to abandon were described.The influence of car-bonation was considered and a model of carbonation-absorption for RAC was also proposed.By col-lecting the basic data at every stage,the CO2 emission of 1 m3 C30 RAC was obtained.Finally,by converting CO2 emission to environmental cost and the requirement of green areas or trees with same amount absorbed,the environmental impact assessment was conducted.The results show that the CO2 emission of 1 m3 C30 RAC decreases with the increase of the replacement ratio of recycled coarse aggregate (RCA).The CO2 emissions are 314.2,310.9,307.6,301.4 kg when the re-placement ratios are 30%,50%,70%,100%,respectively.Transport of RCA and carbonation is the main reason for the reduction of CO2 emission with the increase of the replacement ratio.Compared with natural concrete,RAC is superior to environmental values in the reduction of CO2 emission.关键词
再生混凝土/CO2 排放量/生命周期评价/环境价值Key words
recycled aggregate concrete/CO2 emission/life cycle assessment/environmental value分类
建筑与水利引用本文复制引用
肖建庄,黎骜,丁陶..再生混凝土生命周期CO 2排放评价[J].东南大学学报（自然科学版）,2016,46(5):1088-1092,5.基金项目
国家杰出青年科学基金资助项目（51325802）． （）
