摘要
文中围绕不同纤维类型、纤维长度及纤维掺量对水工混凝土力学强度的影响进行了研究.结果表明,聚乙烯醇纤维与聚丙烯纤维混凝土的抗压、抗拉及抗折强度相差不大,而钢纤维混凝土的抗压、抗拉及抗折性能分别比聚丙烯纤维混凝土高 16.9%、8.7%及4.5%,比聚乙烯醇纤维混凝土高21.8%、13.1%、22.1%.钢纤维混凝土力学强度与纤维长度、掺量均呈现先正相关后负相关的关系.本研究测试条件下,最佳钢纤维长度为20 mm,最佳钢纤维掺量为0.4%.
Abstract
In this paper,the effects of different fiber types,fiber lengths and fiber content on mechanical strength of hydraulic concrete were studied.The results show that the compressive,tensile and flexural strengths of PVA fiber and PP fiber concrete are not much different,while the compressive,tensile and flexural properties of steel fiber concrete are 16.9%,8.7%and 4.5%higher than those of PP fiber concrete,and 21.8%,13.1%and 22.1%higher than PVA fiber concrete,respectively.The tensile strength,compressive strength and flexural strength of steel fiber reinforced concrete are first positively correlated and then negatively correlated with fiber length and fiber content.Under the test conditions,the best steel fiber length is 20mm;The optimal steel fiber content is 0.4%.
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