Flexural Strength and Behavior of Polypropylene Fiber Reinforced Concrete Beams  

作　　者：姚武 

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2002年第2期54-57,共4页武汉理工大学学报（材料科学英文版）

基　　金：Supported by Natural Science Foundation of China (No. 59908007) and Foundation for University Key Teacher by the Min-istry of Education (GG - 430 - 10247 - 1175).

摘　　要：The strength and deformation characteristics of polypropylene fiber reinforced concrete ( PFRC) beams were investigated by four-point bending procedures in this paper. Two kinds of polypropylene fibers with different fiber contents (0.2% , 0.5% , 1.0% and 1.5% ) by volume were used in, the beam, which measured 100 × 100 mm with a span of 300 mm. It was found that the strength of the reinforced concrete beams was significantly decreased, whereas the flexural toughness was improved, compared to those unreinforced concrete beams. Geometry properties and volume contents of polypropylene fiber were considered to be important factors for improving the flexural toughness. Moreover, the composite mechanism between polypropylene fiber and concrete was analyzed and discussed.The strength and deformation characteristics of polypropylene fiber reinforced concrete ( PFRC) beams were investigated by four-point bending procedures in this paper. Two kinds of polypropylene fibers with different fiber contents (0.2% , 0.5% , 1.0% and 1.5% ) by volume were used in, the beam, which measured 100 × 100 mm with a span of 300 mm. It was found that the strength of the reinforced concrete beams was significantly decreased, whereas the flexural toughness was improved, compared to those unreinforced concrete beams. Geometry properties and volume contents of polypropylene fiber were considered to be important factors for improving the flexural toughness. Moreover, the composite mechanism between polypropylene fiber and concrete was analyzed and discussed.

关 键 词：polypropylene fiber mechanical properties fiber reinforced concrete 

分 类 号：TU377.9[建筑科学—结构工程]