BITUMINOUS PAVEMENT POLISHING

Eleven test strips containing replicate sections of bituminous pavements used in Pennsylvania were placed at the behest of a Joint Industry-PennDOT Task Force to investigate field performance of the aggregates. Fifty-two aggregate samples and 223 pavement cores of the test sections were polished in the laboratory by various methods. Laboratory-field data correlations indicate that the general level of skid resistance characteristics of surface aggregates may be determined in the laboratory and that aggregates are ranked similarly by both approaches. However, the correlations failed to produce regression equations that could, with confidence, define mathematical relationships for predicting specific field skid numbers.