The paper describes the details of a comparison of moduli measured in the laboratory by resilient modulus testing with moduli measured in the field by falling weight deflectometer (FWD). This includes an analysis of whether good agreement between laboratory and field values should be expected, as well as an assessment of relative quality of the results and relative testing costs. It is pointed out that good agreement between laboratory and field measured moduli should not be expected when following the usual practice of sampling and testing only the top 1 or 2 feet of the subgrade. It was found that the cost of determining moduli by laboratory resilient modulus testing is typically 60-80 time greater than the cost of an equivalent field testing program with the FWD. The study also concluded that the moduli from field FWD testing are typically of higher quality and more appropriate for mechanistic pavement design than laboratory measured moduli.

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  • Accession Number: 00620832
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Mar 31 1992 12:00AM