合成纤维混凝土弯曲韧性研究  

Study on Flexural Toughness of Synthetic Fiber Concrete

作　　者：王金辉 葛晨 谈永泉 俞君宝[2] WANG Jin-hui;GE Chen;TAN Yong-quan;YU Jun-bao(Yangzhou Water Supply and Drainage Management Office,Yangzhou 225127,China;Yangzhou Industrial Vocational and Technical College,Yangzhou 225127,China;Suzhou Concrete and Cement Products Research Institute Testing Center Co.,Ltd.,Suzhou 215004,China)

机构地区：[1]扬州市给排水管理处,江苏扬州225127 [2]扬州工业职业技术学院,江苏扬州225127 [3]苏州混凝土水泥制品研究院检测中心有限公司,江苏苏州215004

出　　处：《混凝土与水泥制品》2020年第11期61-65,共5页China Concrete and Cement Products

基　　金：国家重点研发计划项目(2018YFD1101002、2016YFB0303104);扬州市科技计划项目(YZ2019047);江苏省建设系统科技项目(2018ZD117)。

摘　　要：通过聚丙烯腈(PAN)纤维混凝土和聚乙烯醇(PVA)纤维混凝土的三点弯曲切口梁试验,研究了合成纤维掺量和弹性模量对混凝土弯曲韧性的影响,探究了纤维混凝土跨中挠度(δ)和裂缝张开口位移(CMOD)与纤维掺量的关系。结果表明:针对混凝土弯曲韧性而言,PAN纤维与PVA纤维的合适掺量范围分别为1.5~1.8 kg/m^3和1.3~1.5 kg/m^3;δ与CMOD之间存在线性关系,可以用纤维掺量与CMOD预测δ。The influence of the content and elastic modulus of synthetic fiber on the flexural toughness of polyacrylonitrile(PAN)fiber concrete and polyvinyl alcohol(PVA)fiber concrete was studied by the three-point bending notch beam test.The relationship between midspan deflection(δ)and crack tensioning displacement(CMOD)and fiber content of fiber concrete was investigated.The results show that the optimal content range of PAN fiber and PVA fiber are 1.5~1.8 kg/m^3 and 1.3~1.5 kg/m^3,respectively.There is a linear relationship betweenδand CMOD,the fiber content and CMOD can be used to predictδ.

关 键 词：合成纤维 纤维掺量 弹性模量 弯曲韧性 

分 类 号：TU528.572[建筑科学—建筑技术科学]