A SIMPLE METHOD OF MEASURING PAVEMENT REBOUND DEFLECTION BOWL DATA AND CALCULATING MODULI

A simple instrument was developed by modifying the Benkelman beam so that the ordinates of the rebound deflection bowl could be measured at five points at 75-mm intervals from the center of dual wheel load, using four additional sets of auxiliary levers and dial gauges. This instrument was used to measure the ordinates of rebound deflection bowls on selected test stretches of flexible pavements in the southern region of India. As most of these pavements consists of granular layers in the subbase and base course with a thin bituminous surface course, the rebound deflection bowl data collected were utilized for the backcalculation of E values of pavement layers by finite-element method using the computer program FEAP. The paper presents the details of the simple instrument, developed at a low cost to measure the rebound deflection bowl and a methodology for the backcalculation of E values of pavement layers using the rebound deflection bowl data.

• Availability:
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• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Rajagopal, A S
  • Justo, CEG
• Conference:
  • First International Symposium on Nondestructive Testing of Pavements and Backcalculation of Moduli
  • Location: Baltimore, Maryland
  • Date: 1988-6-29 to 1988-6-30
• Publication Date: 1989-11

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 387-397

Subject/Index Terms

• TRT Terms: Backcalculation; Benkelman beam; California bearing ratio; Deflection; Flexible pavements; Layer coefficient (Pavements); Modulus of elasticity; Pavement performance; Rebound; Subgrade (Pavements)
• Subject Areas: Data and Information Technology; Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00795864
• Record Type: Publication
• ISBN: 0803112602
• Report/Paper Numbers: ASTM STP 1026
• Files: TRIS
• Created Date: Jul 6 2000 12:00AM