纤维对沥青玛蹄脂碎石混合料（SMA）路用性能的影响

选用木质素纤维和玄武岩矿物纤维,每种纤维变化3种掺量,在初选的最佳沥青用量下,分别进行了析漏损失、飞散损失、高温稳定性和水稳定性试验,研究了纤维种类、掺量对SMA路用性能的影响.结果表明:在纤维复合沥青的最佳组成下,木质素纤维和玄武岩矿物纤维对SMA路用性能的改善效果均随纤维掺量增加而提高.根据试验结果,分别建立了不同种类纤维SMA浸水残留稳定度、冻融劈裂抗拉强度比与飞散损失以及高温稳定性与析漏损失之间的关系式.

Influence of Fiber on SMA Road Performance

The influences of the type and content of fibers on road performances of SMA at the optimum asphalt content were investigated through selecting two kinds of fibers including cellulose fiber and basalt fiber.For each fiber three contents were selected.Road performance tests such as drainage,cantabro,high temperature stability and water stability were carried out respectively.The test results show that the improvement of road performances of SMA with cellulose fiber and basalt fiber is achieved distinctly with fiber content at the optimum composition of fiber and asphalt.Based on the test results the formulas for the relation between immersed Marshall remnant stability,splitting strength ratio under freeze and thaw and cantabro damage,and also formula for the relation between high temperature stability and drainage damage are put forward.