Impact Resistance of Reactive Powder Concrete  

作　　者：焦楚杰 SUN Wei 

机构地区：[1]School of Civil Engineering, Guangzhou University [2]School of Materials Science and Engineering,Southeast University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2015年第4期752-757,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.51478128,51278135 and 50708022);the Scientific and Research Developing Project of Ministry of Housing and Urban-Rural Development of China(2010-K3-27);the Guangzhou Government Higher Vocational Colleges&Schools Yang Cheng Scholar Funded Scheme(10A043G);the Foundation for Fostering the Scientific and Technical Innovation of Guangzhou University

摘　　要：The impact behaviour of three types of reactive powder concretes （RPC） was studied using the split Hopkinson press bar （SHPB） testing method. These RPC were prepared with steel fiber volume fraction of 0%, 3%, and 4%, respectively. The stress-strain relationship, strain rate sensitivity threshold value, dynamic strength increase factor, modulus of elasticity and failure pattern of these RPC specimens subjected to impact load were investigated. From the tests, the strain rate sensitivity threshold value of 50 s-1 was obtained. The experimental results showed that when the strain rate increased from the threshold value to 95 s-1, the maximum stress of RPC increased by about 20% and the modulus of elasticity of RPC increased by about 30%. The failure pattern of RPC specimens with steel fiber reinforcement was very different from that of the RPC matrix specimen when subjected to impact loading. Under similar impact loading rate, cracks developed in the steel fiber reinforced RPC specimens, whilst the RPC matrix specimens were broken into small pieces.The impact behaviour of three types of reactive powder concretes （RPC） was studied using the split Hopkinson press bar （SHPB） testing method. These RPC were prepared with steel fiber volume fraction of 0%, 3%, and 4%, respectively. The stress-strain relationship, strain rate sensitivity threshold value, dynamic strength increase factor, modulus of elasticity and failure pattern of these RPC specimens subjected to impact load were investigated. From the tests, the strain rate sensitivity threshold value of 50 s-1 was obtained. The experimental results showed that when the strain rate increased from the threshold value to 95 s-1, the maximum stress of RPC increased by about 20% and the modulus of elasticity of RPC increased by about 30%. The failure pattern of RPC specimens with steel fiber reinforcement was very different from that of the RPC matrix specimen when subjected to impact loading. Under similar impact loading rate, cracks developed in the steel fiber reinforced RPC specimens, whilst the RPC matrix specimens were broken into small pieces.

关 键 词：split Hopkinson press bar （SHPB） steel fiber reactive powder concrete （RPC） impactcompression 

分 类 号：TU528[建筑科学—建筑技术科学]