橡胶粉对PVA-ECC力学性能影响研究  

Study on the effect of rubber powder on mechanical properties of PVA-ECC

作　　者：夏叶飞 郑业勇 张为民[2] 潘勇[3] 杨才千 孟春麟[3] XIA Ye-fei;ZHENG Ye-yong;ZHANG Wei-min;PAN Yong;YANG Cai-qian;MENG Chun-lin(Jiangsu Huatong Engineering Co.Ltd,Nanjing 210000,Jiangsu,China;College of Civil Engineering and Mechanics,Xiangtan University,Xiangtan 411105,Hunan,China;Jiangsu Fenguan Highway Management Co.Ltd.,Lianyungang 222000,Jiangsu,China;4.College of Civil Engineering,Southeast University,Nanjing 210018,Jiangsu,China)

机构地区：[1]江苏华通工程检测有限公司,江苏南京210000 [2]湘潭大学土木工程与力学学院,湖南湘潭411105 [3]江苏汾灌高速公路管理有限公司,江苏连云港222000 [4]东南大学土木工程学院,江苏南京210018

出　　处：《实验力学》2018年第6期987-993,共7页Journal of Experimental Mechanics

基　　金：湖南省重点研发计划(2018WK2111);湖南省创投项目(2018GK5028);国家自然科学基金青年项目(51708476);湖南省自然科学基金项目(2017JJ3302)资助

摘　　要：为研究橡胶粉对聚乙烯醇纤维增强水泥基复合材料(PVA-ECC)力学性能的影响,以掺入了橡胶粉的PVA-ECC为研究对象,对其强度和压缩韧性进行试验研究,并采用扫描电镜对橡胶粉表面微观形貌进行分析。研究参数包括橡胶粉掺量、改性方式及粒径。试验结果表明:相对于基准试件,橡胶粉掺量为5%时,试件抗压强度提高了6%;掺量为10%时,试件抗压强度基本相等,压缩韧性指标有所提高;橡胶粉掺量较低时,试件呈现多裂缝失效模式,延性相对于基准试件有一定提高;橡胶粉粒径及处理方式对试件力学性能影响不大。因此,采用掺量低于10%的水洗橡胶粉制备PVA-ECC能提高其抗压强度、压缩韧性及延性,且更易制备。In order to study the effect of rubber powder on the mechanical properties of polyvinyl alcohol fiber reinforced engineered cementitious composites (PVA-ECC),the strength and compression toughness of PVA-ECC with rubber powder were investigated experimentally.The microscopic surface morphology of rubber powder was analyzed by scanning electron microscope (SEM).The studied parameters include the amount of rubber powder,modification method and particle size.Experimental results show that compared with the reference specimen,the compressive strength of specimen increases by 6%,when the rubber powder is added to the sample with a content of 5%.When the rubber powder content is 10%,the compressive strength of the specimen is basically equal.Compression toughness index has been improved.When the content of rubber powder is low,the specimen presents multi-crack failure mode,and its ductility is improved compared with the reference specimen.The effect of rubber particle size and modification method on composite mechanical properties can be negligible.Therefore,a small amount of the rubber powder mixed with PVA-ECC can improve its mechanical properties.

关 键 词：聚乙烯醇纤维增强工程水泥基复合材料(PVA-ECC) 力学性能 复合材料 橡胶粉 

分 类 号：TU528[建筑科学—建筑技术科学]