材料期刊网

为研究聚酯纤维掺量和冻融循环次数对沥青混合料水稳定性能的影响,制作聚酯纤维掺量为0、0.1%、0.2%、0.3%的沥青混合料试件.对试件进行冻融循环次数分别为0、2、4、6、8次的冻融劈裂试验.结果表明:随着聚酯纤维掺量的增加,沥青混合料的冻融劈裂抗拉强度呈先上升后下降的趋势,聚酯纤维的最佳掺量为0.2%.冻融循环为0次时,聚酯纤维掺量为0.1%、0.2%、0.3%较不掺聚酯纤维的沥青混合料的冻融劈裂抗拉强度分别提高19.8%、30.2%、13.4%,聚酯纤维的掺入会提高沥青混合料的水稳定性.聚酯纤维掺量为0.2%时,冻融循环2、4、6、8次时,对应沥青混合料的冻融劈裂抗拉强度比分别为86.0%、80.2%、70.1%、61.5%.随着冻融循环次数的增加,沥青混合料的水稳定性逐渐降低.

In order to study the influence of polyester fiber contents and freeze-thaw cycles, asphalt mixture specimens were mixed with polyester fiber whose contents were 0,0.1%,0.2%,0.3%.Asphalt mixture specimens were used to do freeze-thaw split tests.The results indicate that freeze-thaw split tensile strength of asphalt mixture ascended then descended with the increase of polyester fiber.Optimal content of polyester fiber is 0.2%.At the same time, when freeze-thaw cycles is 0 times and the content of polyester fiber are 0.1%,0.2%,0.3%, the freeze-thaw spilt tensile strength of asphalt mixture is increased by 19.8%,30.2%,13.4% compared with the strength of asphalt mixture without polyester fiber, and water stability is improved because of polyester fiber.When the content of polyester fiber is 0.2% and freeze-thaw cycles are 2,4,6,8 times, freeze-thaw split tensile strength ratios of asphalt mixture are 86.0%, 80.2%, 70.1%, 61.5%.Water stability of asphalt mixture is decreased with the increase of freeze-thaw cycles.