RELATIONSHIP BETWEEN CHANGES IN ROAD SURFACE TEXTURE AND SKID RESISTANCE OF CONCRETE PAVEMENTS DUE TO WEAR

Abstract

 It is said that the relationship between the arithmetic mean roughness Ra of micro-textures of concrete pavements and Skid Resistance before and after abrasion is different. In order to clarify the cause of this, we investigated the factors affecting Skid Resistance by macro and micro textures before and after wear using Ra. And the loaded length ratio Rmr in accordance with JIS B 0671-2. The results showed that the microtexture Ra correlated well with smooth and worn surfaces such as tunnel road surfaces with reduced Skid Resistance. However, it was suggested that the index was susceptible to the influence of macro-texture due to the initial status of broom drag formation and the residual status of broom drag subjected to wear action. Therefore, we proposed a model for predicting skid resistance that combines Rmr, which is less sensitive to broom drag, and Ra, which is less sensitive to smooth surfaces.