THE ASSESSMENT OF MAINTENANCE NEEDS FOR ROAD PAVEMENTS

THE APPARATUS AND METHODS DEVELOPED FOR EVALUATION OF THE STRENGTH OF ROAD PAVEMENTS AND THE RIDING QUALITY AND RESISTANCE TO SKIDDING OF ROAD SURFACINGS ARE DESCRIBED. THEY ARE INTENDED FOR USE IN OPERATING A RATING SYSTEM IN WHICH THE CONDITION OF ROADS IS MEASURED QUANTITATIVELY, SO THAT MAINTENANCE PROGRAMS CAN BE DEFINED OBJECTIVELY. PAVEMENT STRENGTH AND THE NEED FOR FURTHER STRENGTHENING ARE ASSESSED BY DEFLECTION MEASUREMENTS UNDER LOAD, EITHER MANUALLY USING THE DEFLECTION BEAM, OR THE DEFLECTOGRAPH DEVELOPED IN FRANCE. RECOMMENDATIONS ARE GIVEN FOR THE DESIGN OF OVERLAYS FOR FLEXIBLE PAVEMENTS BASED ON DEFLECTION MEASUREMENTS. MEASUREMENTS OF RIDING QUALITY USING THE BUMP INTEGRATOR ARE SUITABLE AS A BASIS FOR STARTING ROUTINE ASSESSMENT IN QUANTITATIVE TERMS, BUT THE METHOD HAS LIMITATIONS AND THE NEED FOR FURTHER DEVELOPMENT IN APPARATUS AND STANDARDS IS DISCUSSED. SKIDDING RESISTANCE IS EVALUATED IN TERMS OF SIDEWAY FORCE COEFFICIENT AND A ROUTINE TESTING MACHINE (SCRIM) DEVELOPED BY THE ROAD RESEARCH LABORATORY IS DESCRIBED. CRITERIA FOR SKIDDING ARE DISCUSSED INCLUDING THOSE PROPOSED BY THE MARSHALL COMMITTEE. AT SITES WHERE THE RISK OF SKIDDING ACCIDENTS IS HIGH THE CRITERIA CAN BE MET BY USING SPECIAL SURFACINGS INCORPORATING SYNTHETIC AGGREGATE. /AUTHOR/

• Supplemental Notes:
  • Vol 48, PapER 7377, PP 223-244
• Authors:
  • MILLARD, R S
  • Lister, N W
• Conference:
  • Inst Civil Engineers Proc, London /UK/
• Publication Date: 1971-2

Subject/Index Terms

• TRT Terms: Deflection; Maintenance; Measurement; Pavements; Ratings; Riding qualities; Skid resistance; Strength of materials; Surfacing
• Subject Areas: Highways; Maintenance and Preservation; Pavements;

Filing Info

• Accession Number: 00218794
• Record Type: Publication
• Files: TRIS
• Created Date: Aug 15 1971 12:00AM