A TENTATIVE FLEXIBLE PAVEMENT DESIGN FORMULA AND ITS RESEARCH BACKGROUND

TRIAXIAL CLASS OF MATERIALS, /5/ TRAFFIC, AND /6/ PERFORMANCE DATA WHICH LED TO THE DEVELOPMENT OF A PAVEMENT DESIGN FORMULA AND A TENTATIVE DESIGN METHOD FOR USE IN TEXAS IS DESCRIBED. THE FOLLOWING DATA FROM 188 OF THE 376 SELECTED TEST SECTIONS INCLUDED IN THE RESEARCH PROJECT WERE UTILIZED IN THE ANALYSIS' /1/ LOCATION, /2/ SERVICEABILITY INDEX, /3/ LAYER THICKNESSES, /4/ TEXAS TRIAXIAL CLASS OF MATERIALS, /5/ TRAFFIC, AND /6/ DEFLECTION. THE ANALYSIS CONSISTS ESSENTIALLY OF THE FOLLOWING STEPS' /1/ A DEFINITION OF PAVEMENT PERFORMANCE IN TERMS OF AXLE LOAD APPLICATIONS AND LOSS IN SERVICEABILITY WAS DEVELOPED, /2/ SINCE THE INITIAL PAVEMENT SERVICEABILITY WAS NOT KNOWN, AN ALTERNATE EQUATION FOR PERFORMANCE IN TERMS OF DEFLECTION WAS DEVELOPED FROM SELECTED AASHO ROAD TEST DATA, /3/ AN EQUATION FOR THE DESIRED RELATIONSHIP BETWEEN PAVEMENT PERFORMANCE, PAVEMENT DESIGN /LAYER THICKNESSES AND STRENGTHS/ AND REGIONAL EFFECTS WAS FORMULATED, /4/ AN INDEX TO REPRESENT DESIGN IN TERMS OF LAYER THICKNESS AND STRENGTH WAS CREATED, /5/ A RELATIONSHIP BETWEEN THE TEXAS TRIAXIAL CLASS OF PAVEMENT SYSTEM MATERIALS AND LAYER STRENGTH WAS INTRODUCED, AND /6/ VALUES OF REGIONAL EFFECTS WERE COMPUTED BY THE EQUATION OF STEP 3 FOR EACH TEST SECTION. BASED ON THE RESULTS, THE STATE WAS ARBITRARILY DIVIDED INTO 3 REGIONS OF SIMILAR PAVEMENT PERFORMANCE. A FLEXIBLE PAVEMENT DESIGN METHOD BASED ON THE ANALYSIS IS ILLUSTRATED. IT IS CONCLUDED THAT, /1/ THE METHOD IS SUFFICIENTLY RELIABLE TO WARRANT ITS USE ON A TRIAL BASIS IN TEXAS, /2/ ADDITIONAL STUDY IS NEEDED TO FIND THE CAUSES OF REGIONAL EFFECTS INDICATED BY THE DATA, AND /3/ THE REPORT IS PRELIMINARY AND THE SUGGESTED DESIGN METHOD IS TENTATIVE.

  • Supplemental Notes:
    • Hpr-1/5/, STATE 2-8-62-32, BPR-21
  • Corporate Authors:

    Texas Transportation Institute

    Texas A&M University System, 1600 E Lamar Boulevard
    Arlington, TX  United States  76011
  • Authors:
    • Scrivner, F H
    • Moore, W M
  • Publication Date: 1966-2

Subject/Index Terms

Filing Info

  • Accession Number: 00205341
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, ATRI
  • Created Date: Aug 1 1994 12:00AM