再生粗骨料替代率对各龄期再生混凝土强度影响的试验研究  

Experiment Research on Recycled coarse aggregate replacement rate effects on recycled concrete strength

作　　者：郑居焕[1,2] 庄金平[1,2] 

机构地区：[1]福建工程学院土木工程学院 [2]福建省土木工程新技术与信息化重点实验室,福建福州350118

出　　处：《福建建筑》2016年第8期118-120,共3页Fujian Architecture & Construction

基　　金：福建工程学院本科试验教学教改项目(SJ2013015);福建省教育科学"十二五"规划2013年度课题(FJJKCG13-070)

摘　　要：针对再生粗骨料替代率对再生混凝土强度发展趋势的影响进行了试验研究,再生粗骨料替代率分别为30%、60%、100%,再生骨料混凝土的龄期分别为7d、14d、28d、60d和90d。试验结果表明：再生骨料混凝土的强度随着替代率的增大而略有降低,替代率达到100%时,各龄期混凝土强度降低约9%-11%;随着龄期的发展,再生骨料混凝土强度的发展趋势与普通混凝土类似,前14d发展迅速,后期发展较为缓慢。The recycled coarse aggregate replacement rate effect on concrete strength development were studied in the paper. The replace- ment rate of recycled coarse aggregate are 30%, 60% and 30% respectively and the recycled aggregate concrete age are 7 days, 14days, 60days, 28days and 90days. The experimental results show that the strength of the recycled aggregate concrete is slightly decreased with the the replacement rate increase. When replacement rate reaches 100%, the decrease of strength of concrete were about 9% - 11%. Before 14 days , the strength development of recycled aggregate concrete is rapid with the development of the ages ,while development is relatively slow after 14 days.

关 键 词：再生粗骨料 骨料替代率 混凝土强度 龄期 

分 类 号：TU502[建筑科学—建筑技术科学]