UHMWPE纤维混凝土基本力学性能研究

研究了一种由超高分子量聚乙烯（UHMWPE）纤维增强的新型纤维混凝土基本力学性能。针对C70等级高强混凝土，设计了四种体积掺量纤维混凝土，通过立方体抗压、劈裂抗拉和四点弯曲抗折试验，分析了纤维掺量对混凝土力学性能的影响。结果表明：UHMWPE纤维对混凝土的抗压强度增强作用不明显，但较大提高了混凝土的抗拉强度和抗折强度，且对混凝土有很好的阻裂、增韧效果。在纤维体积掺量为0.3%~0.5%时，劈裂抗拉强度提高25%以上；掺量0.5%时，弯曲抗折强度提高率超过23%。

Research on the Basic Mechanical Properties ofUHMWPE Fiber Concrete

The basic mechanical properties of a new type of UHMWPE fiber reinforced concrete (FRC) were studied. Based on the C70 high strength concrete, the experiments of the cubic compression, splitting tensile and four-point bending for four kinds of the FRC with different fiber volume fraction (FVF) were conducted to research the effects of the FVF on mechanical properties of the FRC. The results show that the enhancement effect of the UHMWPE fiber to the compressive strength of concrete is not obvious. However, the splitting tensile strength and bending strength of concrete were greatly improved by the added UHMWPE fiber, and it has excellent effects to fracture resistance and toughness of concrete. The splitting tensile strength increases more than 25% when the fiber content is between 0.3% and 0.5%, the bending strength increases more than 23% when the fiber content is 0.5%.