高温后再生水泥砂浆抗压强度试验研究  

Experimental Study on Compressive Strength of Recycled Cement Mortar after High Temperature

作　　者：张向冈[1,2] 汪昉[2] 杨健辉[1,2] 陈真[2] 吴帆[2] 

机构地区：[1]河南理工大学生态建筑与环境构建河南省工程实验室,焦作454000 [2]河南理工大学土木工程学院,焦作454000

出　　处：《混凝土与水泥制品》2016年第11期82-86,共5页China Concrete and Cement Products

基　　金：国家自然科学基金项目(41172317);2016年安全生产重大事故防治关键技术科技项目(henan-0006-2016AQ);焦作市2015年科技计划项目;2015年度大学生创新创业训练计划项目(201510460005;201510460011)

摘　　要：以再生细骨料取代率和温度作为影响参数,设计并制作了45个标准立方体试块进行抗压强度试验。观察了试块的破坏过程和破坏形态,实测了试块的极限抗压强度,分析了不同温度下立方体抗压强度与再生细骨料取代率的关系以及不同取代率下立方体抗压强度与温度的关系,讨论了影响参数对于立方体抗压强度的影响规律。结果表明:再生水泥砂浆的破坏过程和形态与天然水泥砂浆相似;当温度达到400℃时,试块无爆裂现象,但试块的颜色变成了暗粉红色;随着再生细骨料的增加,试块质量损失率增大;在恒温3h的条件下,不同的温度对立方体试块抗压强度的影响规律并不明显。Taking the replacement rate of recycled fine aggregate and temperature as the affect parameters, 45 standard cube test blocks were designed and produced to carry out compressive strength test. The failure process and failure mode of test blocks were observed. The limit of the cube compressive strength of test blocks were measured, the relations between cube compressive strength and recycled fine aggregate under different temperatures and the relations between cube compressive strength and temperatures under different replacement rates were also analyzed, the influence law that the parameters made on the cube compressive strength was discussed. The results showed that, the failure process and the failure mode of recycled fine aggregate cement mortar and the failure process and the failure mode of nature is similar; when the temperature reached 400~C, the block has no burst phenomenon, but the color of block turned into a dark pink; with the increase of recycled fine aggregate, the mass lose rate of block increase; the influence law that different temperature making on cube compressive strength of test block is not obvious when temperature keeps same for 3h.

关 键 词：再生水泥砂浆 立方体抗压强度 取代率 再生细骨料 质量损失率 

分 类 号：TU525.9[建筑科学—建筑技术科学]