废旧水泥构造物再生水泥混凝土工作性能影响因素分析  

Analysis of Influencing Factors on Workability of Recycled Cement Concrete from Waste Cement Structure

作　　者：宋长振 刘晨 刘晨东 SONG Changzhen;LIU Chen;LIU Chendong

机构地区：[1]内蒙古公路交通投资发展有限公司,内蒙古呼和浩特010000 [2]内蒙古北疆交通信息工程技术有限公司,内蒙古呼和浩特010000 [3]苏交科集团股份有限公司,江苏南京211112

出　　处：《上海公路》2021年第4期97-101,109,M0007,共7页Shanghai Highways

基　　金：内蒙古自治区交通运输厅建设科技项目NJ-2019-17《废旧水泥构造物再生骨料应用技术研究》。

摘　　要：采用因素分析和正交分析的方法,确定废旧水泥构造物再生水泥混凝土工作性能的影响因素。试验结果表明:再生粗集料取代率在0%~50%时,粗集料替代率与坍落度之间基本呈现线性关系,坍落度随粗集料替代率的升高而降低,整体坍落度损失不大。采取集料强化后,水泥混凝土坍落度增加,提升效果的顺序为化学强化>物理强化>不强化。影响再生集料水泥混凝土坍落度因素的主次顺序则是水灰比>水泥掺量>是否进行强化>再生粗集料替代率。In this paper,the influencing factors on the workability of recycled cement concrete from waste cement structures were determined by means of factor analysis and orthogonal analysis.The results showed that there was a linear relationship between the replacement rate of recycled coarse aggregate and the slump when the replacement rate was 0%~50%.The slump decreased with the increase of the coarse aggregate substitution rate,and the total slump loss was small.After adopting aggregate strengthening,the slump of cement concrete increased,chemical strengthening> physical strengthening>,non-strengthening.The order of the factors that affected the slump of recycled aggregate cement concrete was:water cement ratio> cement content> strengthening> the replacement rate of recycled coarse aggregate.

关 键 词：坍落度 正交分析 集料强化 再生水泥混凝土 

分 类 号：U414[交通运输工程—道路与铁道工程]