钢-聚丙烯混杂纤维混凝土受拉性能试验研究

Research on Tensile Property Experiment of Steel-polypropylene Hybrid Fiber Concrete

摘要: 为了探讨钢-聚丙烯混杂纤维对混凝土试件轴向拉伸力学性能的影响，以钢纤维体积掺量为1%、1.5%、2%，聚丙烯纤维体积掺量为0.1%、0.15%、0.2%，设计了9组钢纤维和聚丙烯纤维混杂试件，开展配筋钢-聚丙烯混杂纤维混凝土受拉性能试验。结果表明：钢-聚丙烯混杂纤维有利于提高混凝土抗拉强度，混杂纤维体积掺量是影响抗拉强度和峰值应变的重要因素，钢纤维体积掺量1.5%和聚丙烯纤维体积掺量0.15%混杂对混凝土受拉性能改善效果较好。

Abstract: In order to investigate the influence of steel-polypropylene hybrid fiber on the axial tensile mechanical property of concrete specimens, 9 groups of steel fiber and polypropylene fiber hybrid specimens were designed with the steel fiber volume of 1%, 1.5%, 2%, and polypropylene fiber volume of 0.1%, 0.15%, 0.2%. The tensile property of reinforced steel-polypropylene hybrid fiber concrete were tested. The results show that steel-polypropylene hybrid fiber is beneficial to improve the tensile strength of concrete, and the volume content of hybrid fiber is an important factor affecting the tensile strength and peak strain. The mixture of steel fiber with volume content of 1.5% and polypropylene fiber with volume content of 0.15%can improve the tensile property of concrete better.