再生骨料与天然骨料物化环境影响的比较  

Comparison of embodied environmental impact of recycled aggregates and natural aggregates

作　　者：龚志起[1] 丁锐[1] 陈柏昆[1] 崔云华[1] 

机构地区：[1]青海大学土木工程学院,青海西宁810016

出　　处：《青海大学学报（自然科学版）》2011年第6期9-12,共4页Journal of Qinghai University(Natural Science)

基　　金：青海大学中青年自然科学基金(2009-QG-11);教育部"春晖计划"项目(S2010013)

摘　　要：为改进废弃混凝土的资源利用状况,采用生命周期影响评价方法,量化比较了再生骨料与天然骨料的物化环境影响;其环境影响分值,采用基于社会支付意愿原理确定的权重因子,加权后用货币价值表示。评价结果表明:再生骨料本身的物化环境影响低于天然骨料;废弃混凝土用于生产再生骨料,不仅可以减少废弃混凝土的填埋处置量,同时可以带来显著的环境效益;在混凝土生产中,再生骨料带来的环境效益会随着替代率的提高而增大。In order to improve the level of concrete waste recycling,the embodied environmental impact of recycled aggregates and natural aggregates were calculated and compared using life cycle assessment method.The environmental impact score expresses in monetary value by means of the weighting factors based on the principle of social willingness to pay.The assessment results indicate that the environmental impact of recycled aggregates is lower than that of natural aggregates.The use of recycled aggregates derived from concrete waste can not only decrease the amount of waste tipped at landfill,but also bring about noticeable environmental benefits.The environmental benefits will increase with the increase of substitution rate of recycled aggregates to natural aggregates.

关 键 词：环境影响 废弃混凝土 生命周期评价 再生骨料 天然骨料 

分 类 号：X820.3[环境科学与工程—环境工程] TU528.09[建筑科学—建筑技术科学]