通过超高分子量聚乙烯纤维混凝土坍落度、离析度、氯离子渗透、抗冲磨试验,分析了纤维掺量和长度对混凝土工作性及耐久性的影响。结果表明,掺入超高分子量聚乙烯纤维后,混凝土流动性降低,但均匀性、抗渗性和抗冲磨性能提高较大,其中短纤维对性能改善最明显。相比无纤维素混凝土,短纤维掺量达到0.15%时,氯离子渗透等级降低一个数量级,而在0.2%时,抗冲磨强度提高约42%。 The effects of fiber content and length on the workability and durability of concrete were analyzed by using slumpness, degree of segregation, chloride ion penetration and abrasion resistance test of UHMWPE fiber concrete. The results show that the flowability of concrete decreases with the incorporation of ultra-high molecular weight polyethylene fibers, but the uniformity, impermeability and abrasion resistance are greatly improved. The short fibers improve the performance obviously. Compared to non-cellulosic concrete, when the short fiber content reaches 0.15%, the chloride ion penetration level is reduced by one order of magnitude, while at 0.2%, the abrasion resistance is increased by about 42%.