Deformation behavior of high performance fiber reinforced cementitious composite prepared with asphalt emulsion  

作　　者：何锐 陈拴发 孙文娟 弓锐 

机构地区：[1]Engineering Research Center for Transportation Materials of Ministry of Education (Chang’an University) [2]School of Materials Science and Engineering,Chang’an University [3]Guangxi Transportation Research Institute [4]Department of Civil and Environmental Engineering,Virginia Polytechnic Institute and State University [5]Xi’an Highway Research Institute

出　　处：《Journal of Central South University》2014年第2期811-816,共6页中南大学学报（英文版）

基　　金：Project(2011BAE27B04)supported by the National Key Technology R&D Program of China;Projects(CHD2011TD003,CHD2011ZD017)supported by the Special Fund for Basic Scientific Research of Central Colleges in Chang’an University,China

摘　　要：A novel engineered cementitious composite(ECC) was prepared with the complex binder of Portland cement and asphalt emulsion.By adjusting the amount of asphalt emulsion,different mixture proportions were adopted in experiments,including four-point bending test,compressive test,and scanning electric microscopy(SEM).The SEM observation was conducted to evaluate the contribution of polyvinyl alcohol(PVA) fiber and asphalt emulsion to the composite toughening mechanism.The tests results show that the most remarkable deflection-hardening behavior and saturated multiple cracking are achieved when the content of asphalt emulsion is 10%.However,excessive content of asphalt emulsion causes severe damages on the deformation behavior as well as loss in compressive strength of the mixture.SEM observation indicates that the influence of asphalt emulsion on the fiber/matrix interfacial property changes the dominant fiber failure type from rupture into pull-out mode,and thus causes beneficial effects for strain-hardening behavior.A novel engineered cementitious composite（ECC） was prepared with the complex binder of Portland cement and asphalt emulsion.By adjusting the amount of asphalt emulsion,different mixture proportions were adopted in experiments,including four-point bending test,compressive test,and scanning electric microscopy（SEM）.The SEM observation was conducted to evaluate the contribution of polyvinyl alcohol（PVA） fiber and asphalt emulsion to the composite toughening mechanism.The tests results show that the most remarkable deflection-hardening behavior and saturated multiple cracking are achieved when the content of asphalt emulsion is 10%.However,excessive content of asphalt emulsion causes severe damages on the deformation behavior as well as loss in compressive strength of the mixture.SEM observation indicates that the influence of asphalt emulsion on the fiber/matrix interfacial property changes the dominant fiber failure type from rupture into pull-out mode,and thus causes beneficial effects for strain-hardening behavior.

关 键 词：TOUGHNESS deformation behavior engineered cementitious composite asphalt emulsion 

分 类 号：TU52[建筑科学—建筑技术科学]