改性沥青混合料在长大纵坡路段的应用

摘要

To improve the rutting phenomenon in the long steep road,the asphalt mixture with modi-fied agent method is provided.Based on an engineering project,the researches on mechanism analysis, asphalt mixture design,experimental study on indoor rut and field effect analysis and so on are made. The results show that when the rutting resistance of asphalt mixture is optimal,the mixing amount of rut agent is 0.35%.At the same time,the average depth of rut is only within 2mm,and the remarka-ble effects of the method are verified.%为解决高速公路长大坡路段车辙病害严重的问题，结合工程实例，分别从机理分析、沥青混合料设计、室内车辙试验研究，以及现场效果分析等方面对掺加改性剂 RA 的沥青混合料抗车辙能力进行研究。结果表明，该工程改性剂掺量为0．35％时沥青混合料的抗车辙能力最优；现场试验后车辙平均深度均在2 mm 以内，改善作用明显。