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 compared 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 Britisch 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 RSVs 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 ranged from 32 to 77. Sandstone has highest PSV and rounded gravel has lowest. Limistone group has PSVs less than 45. The correlation between PSV before and after polishing was carried out. The decrease in SRV from 5 year research project has shown that it was constant after 3 year of service life. The relationship 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. /Author/

  • Corporate Authors:

    Thailand Department of Highways

    Materials and Research Division
    Bangkok 4,   Thailand 
  • Authors:
    • Sukhawan, C
    • Chaichotechuang, S
  • Publication Date: 1977

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: 40 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00188173
  • Record Type: Publication
  • Source Agency: Thailand Department of Highways
  • Report/Paper Numbers: Research Rpt MR 25
  • Files: TRIS
  • Created Date: Mar 28 1979 12:00AM