纤维掺量对公路沥青混凝土抗疲劳性能的影响研究

Study on Fatigue Resistance of Fiber to Highway Asphalt Concrete

文中就聚酯纤维掺量对沥青混合料抗疲劳性能的影响进行研究,并对比聚酯纤维和矿物纤维沥青混合料的疲劳寿命。结果表明,与普通混合料相比,掺入纤维可提高沥青混合料的抗疲劳性能;沥青混合料的疲劳荷载作用次数与聚酯纤维掺量先成正相关后成负相关关系,最佳聚酯纤维掺量为0.3%;矿物纤维沥青混合料的疲劳寿命高于聚酯纤维沥青混合料的疲劳寿命。

In this paper,the influence of polyester fiber content on the fatigue resistance of asphalt mixture was studied,and the fatigue life of polyester fiber and mineral fiber asphalt mixture was compared.The results show that the fatigue resistance of asphalt mixture can be improved by adding fiber compared with common mixture.The fatigue load times of asphalt mixture were first positively correlated and then negatively correlated with the content of polyester fiber.The optimal content of polyester fiber in this study was 0.3%.The fatigue life of mineral fiber asphalt mixture is higher than that of polyester fiber asphalt mixture.