Research on the performance of polyethylene wax warm mix rejuvenated asphalt.

Waste plastic polyethylene wax has been widely studied by researchers for its ability to improve the performance of asphalt pavement and its good economic benefits. This article selected new polyethylene wax (NPEW) and recycled polyethylene wax (RPEW) as warm mix agents (PEW) in an equal ratio, and added PEW and rejuvenator (LBS) to the virgin and aged blending asphalt to prepare polyethylene wax warm mix rejuvenated asphalt. The virgin and aged blended asphalt contained 20%, 30%, and 40% aged SBS-modified asphalt (AAM), respectively, to simulate the proportion of old asphalt in the actual road surface rejuvenation process. The temperature sensing performance, high and low temperature performance, and viscosity reduction effect of warm mix recycled asphalt with different PEW and AAM dosages were analyzed through the conventional test and Brookfield viscosity. The results show that the addition of AAM and PEW reduced the temperature sensitivity of warm mix rejuvenated asphalt. When the AAM content in warm mix rejuvenated asphalt was constant, with the increase of PEW content, the high-temperature deformation resistance and low-temperature crack resistance performance were significantly improved. When the content of AAM in warm mix rejuvenated asphalt was low, the addition of PEW effectively reduced viscosity. When the AAM content was 30% and the PEW content was 2%, warm mix rejuvenated asphalt had the best performance and economic benefits. [ABSTRACT FROM AUTHOR]