橡胶颗粒低噪音路面水稳定性的改进方法研究

Study on the Improved Method of the Water Stability about Rubber Particles of Low Noise Asphalt Pavement

在沥青混合料中掺加废旧橡胶颗粒,破坏了沥青与矿料间的黏附力,无法形成很好的空隙率、饱和度和骨架结构,使抗水损害性能有所下降。在分析沥青路面水损害产生机理的基础上,通过浸水马歇尔试验和冻融劈裂试验,对掺加废旧橡胶颗粒后的普通AC-20沥青混合料进行了水稳定性分析,研究了水泥作为抗剥落剂及其用量对橡胶颗粒低噪音路面水稳定性的影响。试验分别采用0.5%、1.0%、1.5%、2.0%及不掺加五种不同剂量的水泥等质量代替矿粉,通过对五组试验的浸水残留稳定度和冻融劈裂残留强度比的对比分析,探讨了最优水泥用量。

Adding waste rubber grains to the asphalt mixture will damage the adhesion between asphalt and mineral aggregate,can＇t form a good porosity,saturation and skeleton structure so that it can decrease the water damage resistance.So on the basis of analyzing the generation mechanism of water damage on asphalt pavement,according to immersion Marshall test and freeze-thaw splitting test,the water stability of common AC-20 asphalt mixture mixed with waste rubber particles is analyzed.Using 0.5%,1.0%,1.5%,2.0% and not mixed with five kinds of different dosages of cement quality instead of mineral powder,based on immersion residual stability and freeze thaw splitting residual strength ratio comparative analysis of 5 tests,the optimal dosage of cement is discussed.