Research on the Polishing Process of Aggregates on Pavement Surface on Basis of Mineral Characteristics

This paper investigates the behaviors of typical mineral components of the aggregates due to tire-polishing. Four kinds of granitic aggregates were polished and tested. The friction and surface texture in polishing process were monitored. The wearing behaviors of typical mineral components were analyzed by spectrum approach. It was found that a fine mineral structure for granite brings an overall high friction level. The alkali feldspars group contributes to almost constant skid resistance and these crystals experiences a unique increase on all wave lengths in the polish process. The work here may be helpful for an active design of a high friction level all through the service years for pavement surfaces.