聚酯和聚丙烯腈纤维沥青稳定性试验研究

Comparing Tests on High and Low Temperature Capacity of Polyester Fiber and Polyacrylonitrile Fibers Reinforced Asphalt Concrete

为了研究纤维沥青混凝土的高低温稳定性,选择无纤维、聚酯纤维、聚丙烯腈纤维及二者混合纤维(比例4∶1)4种配方的沥青混凝土进行车辙试验和低温弯曲试验.结果表明,加入纤维后沥青混合料的抗车辙能力、抗弯拉强度及极限弯拉应变均明显提高.聚丙烯腈纤维的改善效果明显优于聚酯纤维,而二者的混合纤维效果最优.

Four kinds of fiber mixture are put into asphalt concrete, i. e. , non fiber, polyester fiber, polyacry lonitrile fibers and the compound of the last two fibers, then the rutting tests and low temperature mo ment tests are carried out. It is found that with the adding of fiber, the rut-resistant capacity, mo ment-resistant capacity and maximum strain are all raised. In the view of capacity enhancing, the corn pound fiber is the best, the polyacrylonitrile fibers is the second, and the polyester fiber is at last.