水泥稳定三渣基层回收料的收缩性能  

Shrinkage Performance of Cement Stability Recycled Lime Fly Ash Stabilized Aggregate

作　　者：常康[1] 李立寒[1] 汪于凯 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海201804 [2]青岛市市政工程设计研究院有限责任公司,山东青岛266000

出　　处：《华东交通大学学报》2015年第6期67-73,共7页Journal of East China Jiaotong University

摘　　要：采用上海地区早期用二灰碎石(简称三渣)基层回收料部分或全部替代天然集料用于水泥稳定碎石基层建设中。为了研究水泥稳定三渣基层回收料收缩性能,基于干缩应变、失水率、干缩系数等指标,考虑三渣回收料掺量、水泥剂量等因素的影响,对其收缩特性进行了室内试验研究,并对比分析了水泥稳定三渣基层回收料与普通水泥稳定碎石收缩性能的差异。试验结果表明:暴露时间、失水率、三渣回收料掺量及水泥用量等因素,均对水泥稳定三渣基层回收料的收缩变形特性产生明显影响;普通水泥稳定碎石混合料的收缩性能优于水泥稳定三渣基层回收料。This paper used early recycled lime fly ash stabilized aggregate of Shanghai to replace natural aggregate for cement stabilized aggregate base. Shrinkage performance of cement stabilized recycled lime fly ash stabilized aggregate was analyzed, considering the influence of different recycled aggregate contents and different cement contents by laboratory test, and based on the parameters of dry shrinkage strain, water loss rate and dry shrinkage coefficient. The performance of cement stabilized lime fly ash stabilized aggregate was compared with cement stabilized aggregate. Test results have indicated that the factors including exposure time, water loss rate,recycled aggregate contents and cement contents have significant impact on the shrinkage performance of cement stabilized recycled lime fly ash stabilized aggregate. The shrinkage performance of cement stabilized aggregate is better than that of cement stabilized recycled lime fly ash stabilized aggregate.

关 键 词：三渣基层回收料 水泥稳定碎石 收缩性能 

分 类 号：U416.26[交通运输工程—道路与铁道工程]