添加Sasobit的沥青与沥青混合料性能分析

Performance analysis of asphalt and asphalt mixture with Sasobit

为了评价Sasobit的降温效果及其对沥青混合料路用性能的影响,对掺加中温沥青改性剂Sasobit后的沥青胶结料进行了针入度及软化点试验,对未掺加Sasobit的正常温度拌和成型的沥青混合料试件与添加Sasobit后降低拌和成型温度制作的沥青混合料试件进行了空隙率试验、车辙试验、小梁弯曲试验及冻融劈裂试验,分析了沥青与沥青混合料的性能。分析结果表明,掺加Sasobit后,沥青胶结料的高温稳定性得到提高,降低拌和成型温度制作的沥青混合料试件的空隙率、低温抗裂性及水稳定性与未掺加Sasobit的正常温度拌和的沥青混合料试件相比基本保持不变,同时沥青混合料高温稳定性提高较大,因此,通过添加Sasobit降低混合料的拌和及成型温度是可行的。

In order to evaluate the temperature-lowered effect of Sasobit and its influence on the road performances of asphalt mixture,penetration test and softening point test for asphalt with Sasobit were done,void ratio test,rutting test,bending-beam test and frost thawing and splitting test were done to asphalt mixture samples without Sasobit mixed in normal temperature and with Sasobit mixed in low temperature,and their performances were analyzed.Test result indicates that the high temperature stability of asphalt with Sasobit increases,the changes of the void ratio,crack resistance stability in low temperature and water stability of mixtures with Sasobit are unobvious,but its high temperature stability enhances,it is feasible that the mixing and molding temperatures of asphalt mixture are lowered by using Sasobit.9 tabs,1 fig,13 refs.