摘要
研究了采用不同工艺制作的 3种几何形态的聚丙烯纤维在不同掺量情况下对水泥基材料力学性能的影响 ,结果表明 :(1 )当掺量 φf≤ 1 .0 %时 ,拉丝PP纤维和膜裂ⅠPP纤维虽然不能提高混凝土的强度 ,但却能大幅度提高混凝土的抗弯韧性 ;(2 )低掺量 (φf=0 .0 5 % )时 ,膜裂ⅡPP纤维对混凝土的力学性能无不良影响 ,并可使砂浆抗冲强度、混凝土抗弯韧性指数明显提高 .另外 。
In present paper, the effects of different geometrical shapes and different additions (by volume) of polypropylene fibers on mechanical properties of cement matrix materials were researched. The results showed that: (1) the addition of PP fiber less than 1.0 % reduced the mechanical properties of concrete. However, it was observed that the toughness of PP fiber reinforced concretes increase obviously than that of unreinforced concrete. (2) low addition ( φ f=0.05 %) of fibrillated film ⅡPP fiber would not affect mechanical properties of concrete, but could increase impacting strength and toughness indexes of concrete. Moreover, the mechanism of effects of polypropylene fibers on the mechanical properties of concrete was also discussed.
出处
《建筑材料学报》
EI
CAS
CSCD
2000年第3期235-239,共5页
Journal of Building Materials
基金
上海市教育委员会重点学科研究项目
关键词
聚丙烯纤维
水泥基材料
混凝土
力学性能
polypropylene fiber
cement matrix material
concrete
mechanical propertie
