天然岩沥青改性沥青路面抗车辙性能分析

分析了天然岩石沥青改性剂的作用机理,通过车辙试验和动态蠕变试验研究了岩沥青改性沥青混凝土的高温性能,并采用有限元分析计算了岩沥青改性剂对沥青路面结构抗车辙性能的影响。研究结果表明:岩沥青改性剂可提高沥青混凝土的模量,使混合料的动稳定度值和蠕变模量得到大幅提高,明显改善了沥青混合料的高温性能;与普通沥青路面结构相比,岩沥青改性沥青路面结构的抗车辙变形能力可提高20%。

Anti-rutting Performance of Asphalt Pavement Modified by Rock Asphalt

The modification mechanism of natural rock asphalt modifier was analyzed.The hish-temperature performnce of modified asphalt concrete with natural rock asphalt Was studied based on rutting test and dynamic creep test,and the anti-rutting performnce of asphalt pavement structure affected by rock asphalt modifier was calculated with the finite software ANSYS.The results indicate that(1)the module of asphalt concrete,the dynamic stability and the creep module of asphalt mixture can be enhanced greatly and the high temperature performance of asphalt mixture can be strengthened obviously by using rock asphalt modifier;(2)the and-rutting ability of rock asphalt modified asphalt pavement structure can increase 20%compared with that of the common asphalt pavement structure.