SBS掺量对沥青混合料水稳定性能的影响研究

Study on Influence of SBS Content on Water Stability of Asphalt Mixture

排水路面早期主要受水损害较多,一旦发生破坏,对路面的正常使用性能影响较大。为了改善排水沥青混合料的水稳定性,展开研究SBS掺量对沥青混合料水稳定性能的影响。选取SBS掺量为3.0%,4.5%,6.0%,7.5%,9.0%五种改性沥青,通过沥青混合料浸水飞散试验,冻融劈裂试验,浸水马歇尔试验,浸水汉堡车辙试验对混合料的水稳定性进行评价,对比分析不同SBS掺量对混合料水稳定性的影响。试验表明,高掺量的SBS改性沥青有效改善排水沥青混合料的水稳定性能。综合考虑,推荐较佳SBS掺量为6.0%。

In the early stage, the drainage pavement was mainly damaged by water. Once damage occurs, a great impact on the normal performance of the pavement is large. In order to improve the water stability of drainage asphalt mixture, the influence of SBS content on the water stability of asphalt mixture is studied.Five kinds of modified asphalt with SBS contents of 3%, 4.5%, 6%, 7.5% and 9.0% are selected. The water stability of asphalt mixture are evaluated by the immersion scattering test, freeze-thaw split test,immersion Marshall Test and submerged Hamburg wheel tracking test. The influences of the different SBS contents on the water stability of the mixture are compared and analyzed. The test results show that the modified asphalt with high content of SBS can effectively improve the water stability of drainage asphalt mixture. By comprehensive considering, the recommended SBS content is 6.0%.