所谓改性沥青是指基质沥青与一种或数种改性剂通过适宜的加工工艺形成的混合物。近年来,在干线公路上行驶的车辆轴载重,行进呈渠道化状况,给沥青路面的使用带来很大影响。许多使用进口沥青或国产优质重交通沥青的高速公路,也很快出现了车辙、坑槽、裂缝等病害,这种情况是与沥青性能有很大关系的。所以要想提高干线公路特别是高速公路的修筑质量、避免早期损坏,需 The so-called modified asphalt refers to the base asphalt and one or several modifiers through a suitable processing process to form a mixture. In recent years, vehicles traveling on trunk highways have a heavy load on the road and are in a state of canalization, which has a great impact on the use of asphalt pavement. Many highways with imported bitumen or domestic high-quality heavy traffic bitumen quickly developed rutting, pits, cracks and other diseases. This situation is closely related to the performance of asphalt. Therefore, in order to improve the quality of the main highway, especially the expressway, to avoid the early damage,