POLISHING CHARACTERISTICS OF COMMON ROCK TYPES USED AS AGGREGATE IN BITUMINOUS PAVEMENT SURFACES

Bituminous pavement surfaces constructed with aggregates of different rock types, or of the same rock type but from different sources, often exhibit different friction characteristics under comparable traffic conditions. Rock type, abrasive size, number of wheel passes, and contact pressure between surface and tire have been generally recognized as primary factors that control the polishing process. To investigate the relation of these factors to rock properties, but without bias caused by shape and size of the aggregate or by mix design, flat surfaces of six rock types varying in texture and mineral composition were polished in a laboratory procedure. The results indicate that the susceptibility to polishing increases with the softness and homogeneity of the rocks, the fineness of the abrasive, the number of polishing cycles, and increased contact pressure.

  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Dahir, S H
    • Meyer, W E
  • Publication Date: 1978-1

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00176761
  • Record Type: Publication
  • Source Agency: Engineering Index
  • Files: TRIS
  • Created Date: Jun 28 1978 12:00AM