One important factor which contributes to the road accident is the friction of road surfaces. Friction needs vary with different types of road surfaces and under different circumstances. Three types of pavements constructed with limestone aggregate namely, portland cement concrete, asphaltic concrete and penetration macadam were selected. The criteria used in the selection were that each type of pavement would differ in age and texture depth but have similar traffic volume, environmental conditions and geometric design. A Mu-meter was used to record friction values in both wet and dry conditions and percentage of non carbonate in samples of limestone aggregate were determined. The effects of speed, texture depth, age and water film thickness on skid values were investigated. In analysis of the data macro and micro principles of approach were applied which revealed that in dry condition all types of pavements under the circumstances investigated exhibited sufficient macro and micro textures which reflected in sufficient coefficient of friction. However, in wet condition, both asphaltic concrete and macadam surfaces with low texture depth and high age exhibited low macro and micro textures resulting in low friction values. Comparisons and relationships between Mu-meter and British Portable Tester were also determined and it was found that their was a good correlation between the two. /Author/

  • Corporate Authors:

    Thailand Department of Highways

    Bangkok 4,   Thailand 
  • Authors:
    • Sukhawan, C
    • Phahusutr, S
    • Bannag, S
    • Israsena, A
  • Publication Date: 1975-2

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 35 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00165500
  • Record Type: Publication
  • Report/Paper Numbers: Report Number 15
  • Files: TRIS
  • Created Date: Jan 13 1978 12:00AM