【摘要】 文中通过对超高分子量聚乙烯纤维干法制备工艺调节，制备出直径为0.05mm、0.15mm和0.25mm的超高分子量聚乙烯粗纤维，系统性研究了不同直径纤维对超高性能混凝土的流动性和力学性能影响。结果表明，与工艺未调节的细纤维对比，纤维的直径越大，在同等体积掺量情况下超高性能混凝土的流动性越好，对应的超高性能混凝土抗压强度和抗折强度越高。0.25mm直径纤维体积掺量为1.5%的情况下，抗压强度为137.4MPa，抗折强度为16.4MPa，较基体混凝土分别提高了9.4%和20.3%。更多还原

【Abstract】 In this paper, the UHMWPE coarse fibers with diameters of 0.05mm, 0.15mm and 0.25mm were prepared by adjusting the dry preparation process of UHMWPE fibers. The effects of fibers with different diameters on the fluidity and mechanical properties of UHMWPE concrete were systematically studied. The results show that, compared with the fine fiber without process adjustment, the larger the diameter of the fiber, the better the fluidity of ultra-high performance concrete under the same volume dosage, and the corresponding compressive strength and flexural strength of ultra-high performance concrete are higher. When the volume content of 0.25mm diameter fiber is 1.5%, the compressive strength is 137.4MPa, and the flexural strength is 18.6MPa, 9.4% and 20.3% higher than the base concrete respectively.更多还原