Polished stone values of road surface aggregates in Thailand

The primary objectives of this paper are to study the polished-stone values (psvs) of road surface aggregates in Thailand and compare the laboratory results to the skid resistance values (srvs) measured directly on road surfaces. The apparatus used in the laboratory-determined polished-stone value is the accelerated polishing machine and the British portable tester of the TRRL. The instruments used in measuring skid-resistance values are the mu-meter (side force test trailer) and the British portable tester. The psvs were recorded both before and after polishing. It was found that the average psvs of various types of surface aggregates from different sources in Thailand range from 32 to 77. Sandstone has the highest psv and rounded gravel has the lowest. The limestone group has psvs less that 45. The correlation between psv before and after polishing was carried out. The decrease in srv from a five year research project has shown that it was constant after 3 years of service life. The relationships between the srvs and the average surface texture depths and between side force coefficient, traffic volume and psv were also reported. Good correlation between the srvs and psvs was obtained from this study.

Language

  • English

Media Info

  • Pagination: 21p
  • Serial:
    • Volume: 4

Subject/Index Terms

Filing Info

  • Accession Number: 01439304
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 10:15PM