东南大学学报（英文版）2020，Vol.36Issue(3)：322-327,6.DOI:10.3969/j.issn.1003-7985.2020.03.010
外加剂对再生砂浆性能的影响
Effects of admixture on properties of recycled aggregate mortar
摘要
Abstract
Compared with strengthening the recycled fine aggregate (RFA) from construction and demolition waste,which is time-consuming and complex,adding admixture into the mixtures directly is more efficient and effective to expand the application of recycled aggregate mortar (RAM).The admixture (named as SSC),mixed with sodium hexametaphosphate,sodium lighinsulfonate and citric acid,was directly added into the RAM.First,the compositions and physical properties of the RFA and reference aggregate were studied,respectively.The properties of fresh and hardened mortars were then investigated.The results show that there is a clear difference between the RFA and reference aggregate,and the properties of RAM without SSC are not as good as those of normal mortar.However,the consistency value,water retention rate,compressive strength and setting time values of RAM increase by 5％,7％,66％ and 67％,and its consistency loss and density values decrease by 42％ and 4％ after the SSC is added into the RAM.Therefore,improving the properties of RAM through adding admixture is an effective and efficient approach to expanding its application.关键词
建筑垃圾/再生细骨料/再生砂浆/外加剂Key words
construction and demolition waste/recycled fine aggregate/recycled aggregate mortar/admixture分类
建筑与水利引用本文复制引用
糜人杰,潘钢华,李阳..外加剂对再生砂浆性能的影响[J].东南大学学报（英文版）,2020,36(3):322-327,6.基金项目
The Postgraduate Research and Practice Innovation Program of Jiangsu Province (No.KYCX18_0081),the Fundamental Research Funds for the Central Universities,the Scientific Research Foundation of Graduate School of Southeast University (No.YBPY1918),the National Key Research and Development Program of China (No.2017YFC0703100). （No.KYCX18_0081）
