Influence of macro texture and micro texture on the skid resistance of aggregates.

This article intends to study the influence of macro texture and micro texture on the skid resistance of four types of aggregates. For this purpose, fractal dimension (D), root mean square height (Rq) and Polished Stone Value (PSV) were tested. The Pearson correlation coefficients between PSV and D or Rq in the interval of different polishing cycles were 5calculated and analyzed with correlation analysis. The relationships between PSV and Rq were also established. The results showed that the PSV development was approximately divided into 3 stages including accelerated attenuation stage, decelerated attenuation stage and stabilization stage. There is a critical point of the entire polishing cycles. When the number of the polishing cycles exceeds this critical point, micro texture replaces macro texture to play a major role in the skid resistance of aggregates. In the accelerated attenuation stage, macro texture plays a major role in the skid resistance of aggregates. In the decelerated attenuation stage and stabilization stage, micro texture gradually plays a major role in the skid resistance of aggregates. Because of roughest micro texture in stabilization stage, bauxite can provide the highest levels of skid resistance for high friction surface treatment over the long-term period.