ASTM E660-90 (R2015) PDF Download

The ASTM E660-90 (R2015) standard provides a laboratory procedure to estimate the extent of polishing that aggregates or pavement surfaces are likely to experience under traffic conditions. The standard emphasizes the use of laboratory obtained polishing curves and speed gradients on proposed aggregate combinations and pavement mixtures as helpful tools for predicting their polishing characteristics in field service.

The practice involves placing specimens to be evaluated for polishing resistance in a circular track. These specimens are then subjected to the wearing action of four small-diameter, pneumatic tires without the use of abrasive or water. Terminal polish, which represents the maximum level of polishing, is typically achieved after approximately 8 hours of exposure.