玄武岩纤维与抗车辙剂复合改性沥青混合料路用性能

Pavement Performance of Composite Modified Asphalt Mixture with Basalt Fiber and Anti Rutting Agent

为了探索玄武岩纤维和抗车辙剂复合添加对沥青混合料的增强效果,通过室内试验研究复合改性沥青混合料的路用性能,并与单掺一种改性剂的沥青混合料进行对比。试验表明与单掺玄武岩纤维沥青混合料相比,复合改性沥青混合料动稳定度提高320%,冻融劈裂强度比提高5%,疲劳破坏寿命提高14.6%;与单掺抗车辙剂的沥青混合料相比,复合改性沥青混合料低温抗弯拉应变提高53%,冻融劈裂强强度比提高8%,疲劳破坏寿命提高31.5%。玄武岩纤维与抗车辙剂复合改性能明显提升善沥青混合料路用性能。

In order to explore the effect of basalt fiber and anti rutting agent on asphalt mixture,the pavement performance of composite modified asphalt mixture was studied by laboratory test.And compared with single modifier asphalt mixture,experimental results show that the performance of the two kinds of modifiers is better than that of single basalt fiber.The dynamic stability is increased by 320%,the residual strength ratio is increased by a factor of 5%,and the fatigue life is increased by a factor of 14.6%.Compared with adding two kinds of additives to asphalt mixture,the flexural tensile strain at low temperature is increased by 53%,the residual strength ratio is increased by a factor of 8%,and the fatigue failure life is increased by a factor of about 31.5%,when the single anti rutting agent is added to the asphalt mixture.It shows that basalt fiber and anti rutting agent composite modification significantly can improve the performance of asphalt mixture.