Road Performance and Application of Grouted Semi-Flexible Pavement Materials
This paper studied the material characteristics,gradation design,and road performance of the semi-flexible asphalt mixture by indoor tests,and analyzed the key construction points of the grouted semi-flexible asphalt pavement based on actual projects.The results showed that the mix ratio of the mixture was optimal when the void ratio of the matrix asphalt mixture was controlled at around 20％,the water-cement ratio of the cement paste was controlled at 0.5,and the sand-cement ratio was controlled at below 0.2.The semi-flexible asphalt mixture's dynamic stability was far over 1 000 and the rutting depth was less than 1 mm;with the increasing temperature,the dynamic stability gradually decreased,while the rutting depth first increased and then tended to be stable;60 ℃ was the key point of the sharp change in the temperature sensitivity of the mixture.The Marshall stability of the semi-flexible asphalt mixture was over 75％,first increasing and then decreasing with the increase in temperature,peaking at 45 ℃.
万方数据
维普
