MEASUREMENTS OF DEFLECTION AND CURVATURE OF FLEXIBLE PAVEMENTS - 1964-1965

THIS INTERIM REPORT ON ONE PHASE OF THE RESEARCH STUDY ENTITLED PAVEMENT DESIGN AND PERFORMANCE DESCRIBES THE RESULTS OF BENKELMAN BEAM AND SOUTH AFRICA CURVATURE METER TESTS ON 53 SELECTED SECTIONS OF IN-SERVICE FLEXIBLE PAVEMENT. ELEVEN OF THESE SECTIONS ARE INCLUDED IN THREE SPECIALLY PLANNED AND CONSTRUCTED EXPERIMENTAL PAVEMENTS IN THE HIGHWAY SYSTEM. THE REPORT PRESENTS SUMMARY TABULATIONS OF DEFLECTION, CURVATURE, STRUCTURAL DESIGN AND PERFORMANCE DATA FOR EACH PAVEMENT PROJECT, BY PHYSIOGRAPHIC PROVINCES. THE ANALYSES REPORTED INCLUDE CORRELATIONS BETWEEN /1/ STRUCTURAL DESIGN AND DEFLECTION, /2/ STRUCTURAL DESIGN AND CURVATURE, AND /3/ DEFLECTION AND CURVATURE. THE FOLLOWING CONCLUSIONS ARE MADE FROM THE ANALYSES' /1/ DEFLECTION AND CURVATURE MAY BE CORRELATED WITH THE STRUCTURAL NUMBER /STRENGTH/ OF THE PAVEMENT ONLY WHEN THE PAVEMENTS BEING COMPARED ARE OF ESSENTIALLY THE SAME TYPE. /2/ A FAIR CORRELATION WAS FOUND BETWEEN PAVEMENT DEFLECTION AND CURVATURE, /3/ DEFLECTION AND CURVATURE MEASUREMENTS, TOGETHER, FURNISH THE BEST AVAILABLE SOURCE OF DATA FOR ESTIMATING THE SERVICE LIFE OF A LARGE MILEAGE OF FLEXIBLE PAVEMENTS, /4/ PAVEMENTS HAVING CEMENT OR ASPHALT STABILIZED BASES CANNOT WITHSTAND EVEN A CONSIDERABLY LESSER DEFLECTION OR CURVATURE THAN THE MORE FLEXIBLE PAVEMENT TYPES, AND /5/ A COURSE OF UNTREATED NON-FROST SUSCEPTIBLE MATERIAL IS NEEDED BETWEEN A SOIL-CEMENT COURSE AND THE ASPHALT CONCRETE SURFACE COURSE TO PREVENT OR MINIMIZE REFLECTION CRACKING. /BPR/

  • Supplemental Notes:
    • Hpr-1/2/, 0256/STATE/, BPR 5
  • Corporate Authors:

    Virginia Highway Research Council

    Charlottesville, VA  United States 
  • Authors:
    • Nichols, F P
    • Gunn, R W
  • Publication Date: 1966-6

Subject/Index Terms

Filing Info

  • Accession Number: 00206280
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS
  • Created Date: Oct 1 1994 12:00AM