RESILIENT PROPERTIES OF SUBGRADE SOILS

Equipment and laboratory testing procedures for evaluating the resilient properties of fine-grained soils were developed. Those soil properties that control and resilient properties of fine-grained soils were identified and quantified. Resilient properties of 50 typical Illinois soils were evaluated. Soil resilient properties can be related to soil characteristics (texture, plasticity, organic carbon content, AASHTO group index). Current classification procedures do not group fine-grained soils into groups with distincitive resilient properties. Moisture-density conditions and degree of saturation significantly influence the resilient properties of fine-grained soils. Average resilient properties for various soil classification groups were determined. Regression equations were developed for estimating resilient properties based on soil characteristics, degree of saturation, and volumetric water content. The utilization of resilient properties in pavement design were considered. The stress-dependent resilient properties of subgrade soils should be incorporated into the Illinois flexible pavement design procedure. CBR does not adequately evaluate the repeated load behavior of fine-grained soils.

  • Record URL:
  • Supplemental Notes:
    • This study was sponsored by Illinois DOT and was conducted in cooperation with DOT, Federal Highway Administration.
  • Corporate Authors:

    University of Illinois, Urbana-Champaign

    Department of Civil and Environmental Engineering
    205 North Mathews Avenue
    Urbana, IL  USA  61801-2352
  • Authors:
    • Thompson, M R
    • Robnett, Q L
  • Publication Date: 1976-6

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 59 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00149343
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-IL-UI-160 Final Rpt., FCP 45C2-152
  • Files: TRIS
  • Created Date: May 31 1977 12:00AM