Strategic Highway Research Program (SHRP) Protocol 46, "Resilient Modulus of Unbound Granular Base/Subbase Materials and Subgrade Soils", was the specified procedure for laboratories performing resilient modulus tests on research samples of unbound granular base course material obtained from Long-Term Pavement Performance (LTPP) field sites. P46 requires a test system that includes a triaxial pressure cell component, a closed loop electro-hydraulic repeated load component, and certain load and specimen response control, measurement, and recording components. Two elements of P46 testing were particularly important: verification that the system was calibrated and yielding reasonable results and a practical means of performing quality checks on a daily or more frequent basis. A set of eight test samples was shipped to each of nine LTPP laboratories with appropriate instructions. All participants were required to complete testing of Type I synthetic reference sample set prior to testing the Round 1 proficiency samples. Worksheets, supporting data, analyses, final comments, and conclusions are presented.

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    • Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Corporate Authors:

    Strategic Highway Research Program

    National Research Council, 2101 Constitution Avenue, NW
    Washington, DC  United States  20418
  • Authors:
    • Steele, G W
    • Anderson, D A
    • Antle, C E
  • Publication Date: 1994-8


  • English

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 36 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00667534
  • Record Type: Publication
  • Report/Paper Numbers: SHRP-P-692
  • Files: TRIS, TRB
  • Created Date: Oct 29 1994 12:00AM