AASHO CORRELATION STUDY

THE APPLICATION OF THE DESIGN CONCEPTS DEVELOPED AT THE AASHO ROAD TEST TO LOUISIANA IN-SERVICE PAVEMENTS ARE PRESENTED. IN ORDER TO CORRELATE THE LEVEL OF PERFORMANCE DETERMINED AT THE ROAD TEST WITH THAT OF LOUISIANA PAVEMENTS, PRESENT SERVICEABILITY INDEX (PSI) DETERMINATIONS WERE MADE ON 137 FLEXIBLE SECTIONS AND 51 RIGID SECTIONS. SIXTY-ONE OF THE 137 FLEXIBLE SECTIONS HAD HOT MIX ASPHALTIC CONCRETE (HMAC) SURFACING AND THE REMAINING HAD 3-APPLICATION SURFACE TREATMENT. THESE SECTIONS WERE BROADLY CATEGORIZED ACCORDING TO REGIONAL, TRAFFIC, STRUCTURAL AND DESIGN FACTORS. DATA ACQUISTION CONSISTED OF MAKING FOUR SEPARATE PSI DETERMINATIONS ON EACH TEST SECTION. OTHER MEASUREMENTS CONSISTED OF THREE DYNAFLECT DEFLECTIONS AND VARIOUS STRUCTURAL AND DESIGN DETERMINATIONS. THE COLLECTED DATA WERE ANALYZED, WHENEVER POSSIBLE, USING APPROPRIATE STATISTICAL PROCEDURES. TWO SETS OF EQUATIONS HAVE BEEN DEVELOPED AS A RESULT OF THE REGRESSION ANALYSIS. ONE SET ATTEMPTS TO DESCRIBE THE RELATIONSHIP BETWEEN THE PERFORMANCE INDEX OF THE PAVEMENT AND THE SEASONAL DYNAFLECT DEFLECTIONS. THE OTHER SET DEFINES THE EFFECT OF THE STRUCTURAL AND DESIGN VARIABLES ON THE DEFLECTION OF THE PAVEMENT. THESE EQUATIONS, WITH ADDITIONAL EVALUATION FOR VERIFICATION, MAY BE USED FOR DESIGN OF HIGH TYPE FLEXIBLE PAVEMENTS. /AUTHOR/

Subject/Index Terms

Filing Info

  • Accession Number: 00205386
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: No 63-4sc
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Jan 31 1972 12:00AM