集料类型对沥青超薄磨耗层路用性能的影响

Effect of Aggregate Type on Performance of Asphalt Ultra-thin Friction Layer

为探究集料类型对沥青超薄磨耗层路用性能的影响,对比了玄武岩、88#煅烧铝矾土、75#煅烧铝矾土超薄磨耗层的高温性能、水稳定性、低温抗裂性能和抗滑性能。研究发现:88#煅烧铝矾土超薄磨耗层的路用性能最佳;超薄磨耗层的路用性能与集料的微结构与晶相组成有关,表面微结构越复杂且晶相硬度越高,则超薄磨耗层路用性能越优异。

In order to explore the effect of aggregate type on the pavement performance of the ultra-thin asphalt wear layer,the high temperature properties,water stability,low temperature crack resistance and anti-slip properties of ultrathin wear layers of basalt,88#calcined bauxite and 75#calcined bauxite were compared.The research found that:88#calcined bauxite ultra-thin wear layer has the best road performance.The road performance of the ultra-thin wear layer is related to the microstructure and crystal phase composition of the aggregate.The more complex the surface microstructure and the higher the crystal phase hardness,the better the road performance of the ultra-thin wear layer.