Effect of Polypropylene Fibers on the Long-term Tensile Strength of Concrete  

作　　者：姚武 

机构地区：[1]School of Materials Science and Engineering, Tongji University

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2007年第1期52-55,共4页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the Key Project of Science and Technology Committee of Shanghai Municipality (No. 032112059 ).

摘　　要：The influence of low volume fraction of polypropylene（PP） fibers on the tensile properties of normal and high strength concretes was studied. The experimental results indicate that the addition of PP fibers in concrete leads to a reduction in tensile strength during the age of 28 d. Whereas, after 28 days, there is a notable effect in tensile strength due to PP fibers restraining the formation and growth of microcracks in concrete, which improves the continuity and integrality of concrete structure, Thus, a low volume fraction of PP fibers is beneficial to enhancing the long-term tensile strength of concrete materials and improving the durability of concrete structures.The influence of low volume fraction of polypropylene（PP） fibers on the tensile properties of normal and high strength concretes was studied. The experimental results indicate that the addition of PP fibers in concrete leads to a reduction in tensile strength during the age of 28 d. Whereas, after 28 days, there is a notable effect in tensile strength due to PP fibers restraining the formation and growth of microcracks in concrete, which improves the continuity and integrality of concrete structure, Thus, a low volume fraction of PP fibers is beneficial to enhancing the long-term tensile strength of concrete materials and improving the durability of concrete structures.

关 键 词：polypropylene fiber CONCRETE tensile strength MICROCRACK 

分 类 号：TU528[建筑科学—建筑技术科学]