温拌剂对提高再生沥青混合料旧料掺量的影响研究

Investigation on the Impacts of WMA Additive on Increasing the RAP Contents of Reclaimed Asphalt Mixture

文中基于高温车辙、四点弯曲疲劳、冻融劈裂、半圆弯曲及浸水汉堡车辙试验,研究向不同旧料掺量的再生沥青混合料中加入温拌剂对提高再生沥青混合料旧料掺量的作用影响,并对不同旧料掺量的再生沥青混合料路用性能进行全面评价。试验表明,温拌剂的加入能够明显提高再生沥青混合料中的旧料可掺量。对比不同路用性能下的最佳旧料掺量,给出了旧料掺量建议值。

In order to explore the influence of Sasobit WMA additive on the RAP contents and road performances based on high temperature rutting resistance test,four-point bending fatigue test,freeze-thaw split test,semicircular bending test and submerged Hamburg wheel tracking device.The results showed that the addition of WMA additive can significantly increase the threshold value of RAP contents in recycled asphalt mixture.Different optimum RAP contents under different road performances were compared and the recommended RAP content based on the experimental results was given.