EVALUATION OF RESILIENT MODULUS BY BACK-CALCULATION TECHNIQUE. FINAL REPORT

Resilient modulus is a significant parameter in the design and rehabilitation of pavements. In this study, resilient moduli of highway subgrade soil samples from seven sites in Ohio were determined in the laboratory, utilizing a low-pressure dynamic multi-axial cubical testing system. It was observed that resilient modulus is a function of moisture content, density, deviator stress level and soil type. For a cohesive soil at a given stress level, resilient modulus is very sensitive to fluctuations in moisture content. Also, the resilient modulus rapidly decreases with increasing deviator stress at low stress levels and generally levels off at higher stress levels. Also, three finite element programs, ILLI-PAVE, ILLI-SLAB and OU-PAVE were applied to back-calculate the resilient moduli in conjunction with the field data obtained with the Falling Weight Deflectometer and the Dynaflect. A comparison of the experimental results from non-destructive testing with back-calculation values indicated that the OU-PAVE provided more accurate results. Two special applications of the back-calculation technique were investigated. One application was the determination of moduli of thin, flexible pavements used for airport runways. The second was evaluation of moduli of various layers of materials during the construction of highways. Based on the results of the study, recommendations were made regarding the design/evaluation procedures for the highway pavement system.

  • Corporate Authors:

    Ohio University, Athens

    Department of Civil Engineering
    Athens, OH  United States  45701

    Ohio Department of Transportation

    25 South Front Street
    Columbus, OH  United States  43215

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Sargand, S M
    • Hazen, G A
    • Wilson, B E
    • Russ, A C
  • Publication Date: 1991-10

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 253 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00616460
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/OH-91/005
  • Contract Numbers: State Job 14425(0)
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Oct 31 1992 12:00AM