大掺量厂拌热再生沥青混合料技术研究及应用

Application and Research on Hot-in Plant Recycled Asphalt Mixture with Large Content of RAP

为进一步提高沥青路面回收材料掺量,减少再生混合料成本,文章借鉴法国高模量沥青混合料的设计理念,通过改进级配,新掺入50#低标号沥青,从而实现大掺量厂拌热再生沥青混合料。室内性能评价和现场工程试验路验证表明,该技术可改善高掺量RAP厂拌热再生沥青混合料的性能并节省生产成本。

In order to increase the recycled material content in asphalt pavement, and reduce the recycled mixture costs, hot-in plant recycled asphalt mixture with high content of RAP is prepared by improving the gradation, mixing with fresh asphalt grade 50# asphalt and increasing asphalt content appropriately based on the French high modulus asphalt mixture design concept. The performance evaluation in laboratory and the verification in practice prove that the hot-in plant recycled asphalt mixture has excellent pavement performance and lower costs.