聚合物改性砂浆抗裂性能的试验研究.pdfVIP

学兔兔 2015年 第3期(总 第 305期 ) 混 凝 土 预 拌 砂 浆 Number 3 in 2015(Total No．305) Concrete READY MIXED MORTAR doi：10．3969／j．issn．1002·3550．2015．03．034 聚合物改性砂浆抗裂性能的试验研究 焦楚杰 。赖学全 。胡志勇 ，王 龙 (1．广州大学土木工程学院，广东广州510006；2．中建三局第一建设工程有限公司西部公司，贵州贵阳550023； 3．广州市建筑集团有限公司，广东广州510030) 摘 要：通过试验研究了聚丙烯纤维、乳胶粉、纤维素醚对聚合物砂浆黏结强度、压折比、收缩率和开裂指数的影响。结果表明， 与素砂浆相比，聚合物改性砂浆的拉伸黏结强度最多提高了102％，压折比最多降低了71％，收缩率最多减小了41％，开裂指数最 多减小了93％，抗裂性能得到明显提高。对试验研究结果进行综合分析，优选出三组抗裂性能良好的聚合物改性砂浆。 关键词：聚合物；改性；砂浆；抗裂性能 中图分类号：TU528．01 文献标志码：A 文章编号：1002—3550(2015)03—0126—03 Experimental study on anti—-cracking performance of polymer—-modified mortar JIAO Ch@e ，L Xuequan ，HUZhiyong ，WANG Long (1．School of Civil Engineering，Guangzhou University，Guangzhou 510006，China； 2．West China Branch of First Construction Engineering Limited Company of China Construction Third Engineering Bureau， Guiyang 550023，China；3．Guangzhou Municipal Construction Group Co．Ltd．，Guangzhou 510030，China) Abstract：The polymer—modified mortar were test in order to study the influence of polypropylene fiber，emulsion powder，cellulose ether on the bond strength，ratio of compressive strength to flexural strength，shrinkage ratio and cracking index of mortar．The experi— ment results show that compared with plain cement mortar，the crack resistance of polymer—modified mortar increase obviously，such as the tensile bond strength of polymer—modified mortar increased by up to 102％，and the ratio of compressive strength to flexural strength decreased by up to 71％，and shrinkage ratio reduced by up to 41％，and cracking index reduced by