玄武岩纤维混凝土的抗弯冲击性能  

Flexural Impact Behavior of Basalt Fiber Concrete

作　　者：邓宗才[1] 薛会青[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100022

出　　处：《建筑科学与工程学报》2009年第1期80-83,共4页Journal of Architecture and Civil Engineering

基　　金：北京市自然科学基金项目(8082002)

摘　　要：为了研究玄武岩纤维对混凝土抗弯冲击性能的影响,对玄武岩纤维混凝土及素混凝土梁试件进行了系统的抗弯冲击性能试验。结果表明:玄武岩纤维混凝土B3(纤维掺量为2.8 kg.m-3)的初裂冲击次数比B2(纤维掺量为2.1 kg.m-3)、B1(纤维掺量为1.7 kg.m-3)分别提高了62%和95%;玄武岩纤维混凝土B2的初裂冲击次数比B1提高了21%,玄武岩纤维混凝土B3的破坏冲击次数比B2、B1分别提高了59%和90%,玄武岩纤维混凝土B2的破坏冲击次数比B1提高了19%;纤维掺量由B2提高到B3时,对改善混凝土抗弯冲击性能效果十分显著;玄武岩纤维在合理掺量下可以显著改善混凝土的抗弯冲击性能。In order to research the effect of basalt fiber on the flexural impact behavior of concrete, the flexural impact experiments on basalt fiber concrete and plain concretes were carried out systematically. The results of flexural impact experiment of beams indicate that the initial- crack impact number of basalt fiber concrete B3 （the fiber quality content is 2. 8 kg·m^-3） improves 62o//00 and 95G from B2 （the fiber quality content is 2.1 kg·m^-3） and B1 （the fiber quality content is 1. 7kg·m^-3） respectively, B2 improves 21% from B1; the failure impact number of basalt fiber concrete B3 improves 59% and 90% from B2 and B1 respectively, B2 improves 19 % from B1; when fiber quality content improved from B2 to B3, the flexural impact behavior of fiber reinforced concrete is improved significantly. Basalt fibers can remarkably improve the flexural impact behavior of concrete.

关 键 词：玄武岩纤维混凝土 抗弯冲击性能 配合比 增强机理 冲击延性指标 

分 类 号：TU528[建筑科学—建筑技术科学]