THE LOGICAL DESIGN OF OPTIMUM SKID-RESISTANT SURFACES

A LOGICAL SEQUENCE IS SUGGESTED FOR THE DESIGN OF OPTIMUM SKID-RESISTANCE PAVEMENTS. THE MEAN WAVELENGTH AND SLOPE OF THE TEXTURE MAY BE DETERMINED FROM DRAINAGE REQUIREMENTS AT THE AVERAGE MAXIMUM SPEED FOR THE SECTION OF PAVEMENT UNDER CONSIDERATION, AND THE VALUES MAY BE CHECKED BY THE DEMANDS OF THE HYSTERESIS CONTRIBUTION TO FRICTION IN THE SKIDDING MODE. FOR SURFACES WHERE THE ASPERITIES ARE ROUNDED BY WEAR AND THE DEMANDS OF TRAFFIC, IT IS NECEASARY TO PROVIDE A MICRO-ROUGHNESS AT ASPERITY PEAKS TO ESTABLISH ADHESION BETWEEN TIRE AND ROAD IN WET ROLLING. THE AMPLITUDE OF THE MICRO-ROUGHNESS MUST BE GREATER THAN THE ELASTOHYDRODYNAMIC WATER-FILM THICKNESS WHICH WOULD OTHERWISE EXIST AT ASPERITY TIPS DUE TO RELATIVE SLIP BETWEEN TREAD AND ROAD IN DRIVING OR BRAKED ROLLING, WHEREAS THE ADEQUACY OF ITS SHARPNESS IS INDICATED QUALITATIVELY BY 'FEEL'. IT IS ESTIMATED THAT FOR PRACTICAL ROAD SURFACES THE WAVELENGTH LIES IN THE RANGE 3 TO 20 MM, AND THE MICRO-ROUGHNESS HAS AN ORDER TO MAGNITUDE OF AT LEAST 10 TO 100 MICRONS. /AUTHOR/

Media Info

  • Features: Figures; References;
  • Pagination: p. 39-45
  • Monograph Title: Control of pavement slipperiness: asphalt pavement cracking
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00205755
  • Record Type: Publication
  • Report/Paper Numbers: HS-005 947, HS-009 490
  • Files: HSL, TRIS, TRB, ATRI
  • Created Date: Jul 28 2001 12:00AM