Abstract
In this research, influencing factors on the macrotexture of bauxite clinker aggregate gradation were analyzed and the role of aggregate in the anti-skid performance of asphalt pavement was determined. AMES road texture laser scanner was used to conduct macrotexture tests. It was found that the macrotextures of single grain size aggregates were enlarged as grain size was increased, the macrotextures of mixed grain size aggregates were enlarged as the proportion of small grain size particles was decreased and both fine aggregates and mineral powder extended aggregate structure. Meanwhile, the effect of aggregate size on the macro-structure of the pavement was greater than that of percent voids in coarse mineral aggregate in the dry rodded condition (VCA). In addition, mean texture depth (MTD) was first decreased and then increased with the increase of compaction work. Under the action of traffic load, macro-structure was fluctuated. The results of this paper provide some references for road designers to consider macrotexture in gradation design.
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