混杂纤维增强高性能混凝土强度的试验  

Experimental Study on Strength of Hybrid Fiber Reinforced High-Performance Concrete

作　　者：夏冬桃[1] 徐礼华[1] 池寅[1] 宋志斌[1] 

机构地区：[1]武汉大学土木工程与建筑学院

出　　处：《沈阳建筑大学学报（自然科学版）》2007年第1期77-81,共5页Journal of Shenyang Jianzhu University：Natural Science

基　　金：湖北省教育厅青年科学基金项目(B200514003)

摘　　要：目的揭示钢纤维和聚丙烯纤维混杂后对高性能混凝土强度和抗裂性能的影响.方法参照国家标准和试验方法，按不同的纤维掺量设计了16组纤维增强高性能混凝土试件，进行了大量抗压强度试验和劈裂抗拉性能试验研究.结果低体积掺量的聚丙烯纤维增强高性能混凝土劈裂抗拉试验破坏为爆裂式破坏；在高性能混凝土中掺加适量的钢纤维和聚丙烯纤维可使抗拉强度提高10%-40%，使拉压比增大到1/18-1/16；劈裂抗拉试验破坏为带有一定延性的破坏；钢纤维体积掺量为0.8%、聚丙烯纤维体积掺量为0.11%时混杂纤维增强高性能混凝土的复合增强效果最好，高性能混凝土拉压比为1/16.结论适量掺加钢纤维和聚丙烯纤维可使高性能混凝土的拉压比增大，提高高性能混凝土的抗裂性能.The paper presents an experimental study on the splitting strength and compressive strength of hybrid fiber reinforced high - performance concrete. In the light of the state standards and test methods, splitting tensile strength and ：ompressive strength of 16 different groups of hybrid fiber （containing steel fiber and polypropylene fiber） reinforced concrete specimens are tested. The result shows that low - volume polypropylene fiber reinforced high - performance concrete is brittle - - explosive sabotage damage takes place; adding a reasonable volume of hybrid fibers to high- performance concrete, the splitting tensile strength increases by 10% -40% while the ratio between splitting tensile strength and compressive strength for hybrid fiber reinforced high- performance concrete increases to 1/18- 1/16. When adding 0. 8 % steel fiber and 0.11% Polypropylene fiber, the optimal result of hybrid fiber reinforced high - performance concrete occurs, with the ratio between splitting tensile strength and compressive strength increasing to more than 1/16. Thus, adding reasonable steel fiber and polypropylene fiber into high - performance concrete is helpful to increase splitting tensile strength, as well as the ratio between splitting tensile strength and compressive strength.

关 键 词：混杂纤维 高性能混凝土 强度 拉压比 

分 类 号：TU375[建筑科学—结构工程]