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再生细骨料水泥砂浆的力学性能研究.pdf

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2011 年第 8 期(总第 262 期) 混 凝 土 预 拌 砂 浆 Number 8 in 2011 (Total No.262) Concrete READY MIXED MORTAR doi :10.3969/j.issn.1002-3550.2011.08.038 再生细骨料水泥砂浆的力学性能研究 1,2 2 2 2 陈宗平 ,王 妮 ,郑述芳 ,张士前 (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) 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。 关键词: 再生细骨料;水泥砂浆;取代率;物理指标;抗压强度 中图分类号: TV432 文献标志码: A 文章编号: 1002-3550 (2011)08-0115-03 Experimental study on mechanical behavior of recycled fine aggregate mortar 1,2 2 2 2 CHEN Zong-ping ,WANG Ni ,ZHENG Shu-fang ,ZHANG Shi-qian (1. Civil Engineering Post-doctoral Research Station,Fuzhou University ,Fuzhou 350108 ,China ; 2. College of Civil Engineering and Architecture ,Guangxi University,Nanning 530004 ,China) Abstract: 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
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