再生细骨料水泥砂浆的力学性能研究  

Experimental study on mechanical behavior of recycled fine aggregate mortar

作　　者：陈宗平[1,2] 王妮[2] 郑述芳[2] 张士前[2] 

机构地区：[1]福州大学土木工程博士后流动站,福建福州350108 [2]广西大学土木建筑工程学院,广西南宁530004

出　　处：《混凝土》2011年第8期115-117,120,共4页Concrete

基　　金：国家自然科学基金(50908057);广西科学基金项目(桂科青0832004);广西研究生教育创新计划项目(105931003099)

摘　　要：为了研究再生细骨料水泥砂浆的力学性能,设计了11种不同再生细骨料取代率的水泥砂浆标准试块进行轴心受压试验研究(取代率从0～100%,中间级差10%),观察了再生细骨料水泥砂浆的破坏形态,并获取了其极限强度等力学性能指标,同时对天然细骨料和再生细骨料的各物理指标进行试验测定。试验研究结果表明:再生细骨料与天然细骨料相比,其表观密度低、吸水率高、吸水速率快;再生细骨料砂浆流动性良好,但保水性较差;其抗压强度比天然细骨料水泥砂浆降低50%左右,不同细骨料取代率对再生水泥砂浆的抗压强度影响不大。In order to study the mechanical behavior of recycled fine aggregate mortar,11 kinds of different recycled fine aggregate replacement rate （ranged from 0 to 100%,level differential 10%）of cement mortar test specimens are designed.The failure pattern and the mechanical performance indexes of the cement mortar under different recycled fine aggregate replacement rate are gained by test.And the different physical indexes of natural fine aggregate and recycled fine aggregate are measured in detail.The experiment findings indicate that recycled fine aggregate is lower apparent density,higher water absorption rate and quicker water absorption speed than the natural fine aggregate.The fluidity of recycled fine aggregate mortar is fine,but the water retention is bad,the compressive strength is lower than the natural fine aggregate mortar about 50%.But the replacement rate has little effect on the mortar strength.

关 键 词：再生细骨料 水泥砂浆 取代率 物理指标 抗压强度 

分 类 号：TV432[水利工程—水工结构工程]