WHEEL LOAD EQUIVALENCY BASED ON FLEXURAL FATIGUE OF ASPHALTIC CONCRETE

WHEEL LOAD EQUIVALENCIES HAVE BEEN USED IS THE DESIGN OF PAVEMENTS TO ACCOUNT FOR THE VARIETIES OF LOAD MAGNITUDE AND CONFIGURATION. THIS PRESENTATION IS CONCERNED WITH AN APPROACH FOR ESTIMATING WHEEL LOAD EQUIVALENCIES BASED ON A PARTICULAR FLEXURE FATIGUE CHARACTERISTIC OF ASPHALTIC CONCRETE. THE EQUIVALENCIES ARE REFERRED TO AS DESTRUCTIVE RATIOS, DRS, AND ARE RELATED TO THE NUMBER OF REPETITIONS OF A PARTICULAR STRESS THAT AN ASPHALTIC-CONCRETE SURFACE COURSE CAN ENDURE IN A SPECIFIED PAVEMENT STRUCTURE. THE APPROACH FOR DETERMINING THE DESTRUCTIVE RATIOS IS DESCRIBED FOR SINGLE-WHEEL APPLICATIONS OF VARIABLE LOADS AND TIRE PRESSURES ON PAVEMENT STRUCTURES OF DIFFERENT STRENGTHS. COMPARISONS OF THE CALCULATED DESTRUCTIVE RATIOS WERE MADE WITH WHEEL LOAD EQUIVALENCIES ESTABLISHED BY THE AASHO ROAD TEST ENGINEERS. THESE COMPARISONS SHOWED THAT THERE WAS NOT A CONSISTENT RELATIONSHIP BETWEEN THE TWO EQUIVALENCIES FOR THE FOUR PAVEMENTS CHOSEN. HOWEVER, NOTE IS MADE THAT IN ONE CASE RESULTS OF LOADS ARE CONSIDERED, FOR THE SURFACE COURSE ONLY, WHEREAS FOR THE AASHO CONDITION THE TOTAL PAVEMENT STRUCTURE WAS INVOLVED. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 129-135
  • Monograph Title: Control of pavement slipperiness: asphalt pavement cracking
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00205756
  • Record Type: Publication
  • Report/Paper Numbers: HS-005 947, HS-009 490
  • Files: TRIS, TRB, ATRI
  • Created Date: Jul 28 1994 12:00AM