高PG等级沥青及其混合料在交叉路口中的应用研究

Application of High PG Asphalt and Its Mixture at Road Intersection

交叉口区域内的道路由于车辆频繁制动、启动和转向等受力作用,导致沥青路面面层顶部和内部产生很大的剪应力,使得推移、车辙病害频发。通过室内试验,对高PG等级沥青(PG等级82-22)及其混合料在交叉口病害防治中的路用性能进行研究,发现高PG等级沥青及混合料高温性能远高于普通SBS改性沥青。同时结合工程实际,对其施工应用效果进行评估,评估结果表明可知高PG等级沥青对于路面车振深度的发展有很好的抑制效果,同时其混合料应用于交叉口路面中可以有效提高路面高温抗车辙性能。

Due to the frequent braking,starting and steering of vehicle at road intersection,there was large shear stress on the top and inside of the asphalt pavement,which caused shifts and ruts damage frequently.By laboratory test,road performance of high PG asphalt (PG grade 82-22) and its mixture at road intersection is studied.The result show high temperature performance of high PG asphalt and its mixture is much better than ordinary SBS modified asphalt.Combined with engineering practice,it showed that high PG grade asphalt had a good inhibitory effect on the development of pavement rut depth.At the same time,high PG grade asphalt and its mixture improve the high temperature antirutting performance of road intersection pave-ment effectively.