摘要
对普通混凝土以及钢纤维体积掺量分别为0.6%、0.9%和1.2%的钢纤维混凝土在冻融条件下的立方体抗压强度、轴心抗压强度、抗折强度、荷载挠度曲线等力学性能进行了研究。结果表明:相对于普通混凝土,钢纤维混凝土的立方体抗压强度、轴心抗压强度、抗折强度均有不同程度增加;随冻融循环次数的增加,普通混凝土、钢纤维混凝土的力学性能均有不同程度的退化,但钢纤维混凝土在冻融作用下的力学指标明显优于普通混凝土;相对于普通混凝土,钢纤维掺量为0.6%、0.9%和1.2%的钢纤维混凝土立方体抗压强度提高13.98%~26.55%,轴心抗压强度提高12.59%~31.82%,抗折强度提高19.70%~31.30%。
Through the freeze thaw experiment,the mechanical performance of concrete was studied,whose steel fiber volume fraction varied from 0%to 1.2%.The research work involved the test of mechanical properties such as cubic compressive strength,axial compressive strength,flexural strength,load-defection curves and so on.The results show that along with the volume fraction of steel fiber increasing,the mechanical performance of concrete such as cubic compressive strength,axial compressive strength and flexural strength increases.The mechanical properties of concrete and steel fiber reinforced concrete are degraded in different degrees with the cycle times increased,the mechanical properties of steel fiber reinforced concrete under freeze-thaw are obviously better than those of concrete.When steel fiber volume fraction varied from 0.6%to 1.2%,the fiber reinforced concrete cubic compressive strength increased by 13.98%~26.55%,axial compressive strength increased by 12.59%~31.82%,axial compressive strength increased by 19.70%~31.30%relative to ordinary concrete.
作者
李政伟
黄金林
陆金驰
李青
LI Zhengwei;HUANG Jinlin;LU Jinchi;LI Qing(Guangzhou Communications Investment Group Co.,Ltd.,Guangzhou 510288,China;College of Water Conservancy and Civil Engineering,South China Agricultural University,Guangzhou 510640,China)
出处
《四川建筑科学研究》
2019年第6期74-77,共4页
Sichuan Building Science
基金
广东省水利科技创新项目(2017-28)
广州市科技计划项目(201903010096)
关键词
钢纤维
冻融循环
力学性能
抗压强度
steel fiber
freeze-thaw cycles
mechanical properties
compressive strength
作者简介
李政伟(1975-),男,博士,高级工程师,主要从事新材料在结构中应用的研究;通讯作者:黄金林(1975-),男,博士,副教授,主要从事新材料在结构中应用的研究.E-mail:huangjinlin@scau.edu.cn。
