PAVEMENT FRICTION AND TEMPERATURE EFFECTS

THE MAGNITUDE OF FRICTION PRODUCED BY TWO BODIES IN RUBBING CONTACT, IS AMONG OTHER FACTORS, DETERMINED BY THEIR MATERIAL PROPERTIES, WHENEVER THESE PROPERTIES CHANGE, FRICTION WILL CHANGE ALSO. SINCE RUBBER IS A VISCOELASTIC MATERIAL, WHOSE ELASTIC AND DAMPING PROPERTIES ARE STRONGLY AFFECTED BY TEMPERATURE, THE FRICTION OF RUBBER SLIDERS OR SKIDDING TIRES IS LIKEWISE AFFECTED BY TEMPERATURE. TO BETTER UNDERSTAND THE EFFECT THAT TEMPERATURE HAS ON PAVEMENT FRICTION, THE ADHESION AND HYSTERESIS COMPONENTS ARE SEPARATED AND THEIR TEMPERATURE DEPENDENCE IS STUDIED INDEPENDENTLY. WHEREAS THE ADHESION COMPONENT MAY INCREASE OR DECREASE WITH TEMPERATURE, DEPENDING UPON SLIDING SPEED, THE HYSTERESIS COMPONENT IS USUALLY REDUCED BY TEMPERATURE. BY SUPERPOSITION OF THE ADHESION AND HYSTERESIS CURVES, THE TEMPERATURE DEPENDENCE OF FRICTION CAN BE QUALITATIVELY PREDICTED. FIELD AND LABORATORY TESTS MADE WITH SKID TRAILERS AND PORTABLE TESTERS CONFIRM THIS TEMPERATURE DEPENDENCE. THE EXPERIMENTAL RESULTS ARE OFTEN DIFFICULT TO INTERPRET OR SOMETIMES AMBIGUOUS, HOWEVER, BECAUSE THE DATA ARE INFLUENCED BY FACTORS OTHER THAN TEMPERATURE AND REFLECT THE SUM OF ADHESION AND HYSTERESIS, BOTH OF WHICH ARE TEMPERATURE DEPENDENT IN A DIFFERENT WAY. FOR THESE REASONS CORRECTION FACTORS ARE DIFFICULT TO OBTAIN AND AT PRESENT NONE IS AVAILABLE WHICH WOULD PERMIT NORMALIZATION OF FRICTION MEASUREMENTS TO A SPECIFIED TEMPERATURE WITHIN KNOWN CONFIDENCE LIMITS. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: p. 47-55
  • Monograph Title: Control of pavement slipperiness: asphalt pavement cracking
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00207024
  • Record Type: Publication
  • Report/Paper Numbers: HS-005 948
  • Files: HSL, TRIS
  • Created Date: Jul 28 1994 12:00AM