TESTING METHODOLOGY FOR RESILIENT MODULUS OF BASE MATERIALS

The main objective of this report is to describe a proposed resilient modulus testing procedure which has been developed for the Texas Department of Transportation. This procedure contains the main characteristics of the AASHTO T294-92 procedure with several exceptions. The loading sequence is modified to avoid subjecting the specimens to high deviatoric stresses at low confining pressures. The conditioning cycles are eliminated and replaced by grouting the specimen to the platens to minimize disturbance to the specimen during stage testing. The effects of end restraint on the measured deformations are minimized by using a gage length equal to the middle one-third of the specimen. To avoid well-known problems with mounting LVDTs on the specimen, non-contact probes are utilized to measure the deformations. To maximize the amount of information gained from testing, the lateral deformations are measured with non-contact probes to determine the Poisson's ratio. Based on tests on synthetic and base materials from different parts of Texas, the methodology proposed here seems to yield more accurate and repeatable results. In addition, compared to the AASHTO protocol, the preparation and setup of the specimen are more convenient and less time consuming.

  • Supplemental Notes:
    • Research study title: Application of Resilient Modulus Tests to Texas Base Materials.
  • Corporate Authors:

    University of Texas, El Paso

    Center for Geotechnical and Highway Materials Research
    El Paso, TX  United States  79968-0516

    Texas Department of Transportation

    Research and Technology Transfer Office, P.O. Box 5051
    Austin, TX  United States  78763-5051

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Nazarian, S
    • Pezo, R
    • Picornell, M
  • Publication Date: 1996-7

Language

  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 180 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00728432
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/TX-94/1336-1, Res Rept 1336-1, Res Proj 0-1336
  • Contract Numbers: Study 0-1336
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Nov 15 1996 12:00AM