The primary objective of this study was to investigate the effects of freeze-thaw conditioning and overloading on the resilient modulus (M sub r) of subgrade soils susceptible to frost penetration. The M sub r values of conditioned samples were compared to unconditioned samples. All M sub r values were determined in accordance with AASHTO T 274 test procedure. The report is organized in six chapters. Chapter I is an Introduction. Chapter II describes the freeze-thaw process and moisture imbibition of soils and the effects of overloading on subgrade materials. Use of spring overload restrictions throughout local states and methods of working with frost-susceptible soils in new construction are also covered. Chapter III describes the basic resilient modulus test and how it is used in the AASHTO pavement design procedure. The M sub r testing setup at the University of Wyoming is also discussed. Chapter IV details the soil collection, sample construction, conditioning and testing procedure used in this study. Chapter V discusses the results of the testing regime. Correlations between freeze-thaw and imbibition-only conditioning are also presented. Overloading effects and a comparison between the AASHTO T 274 and the Asphalt Institute testing sequences are also discussed. Chapter V also discusses the limitations of the AASHTO T 274 test. Chapter VI summarizes the study and suggests recommendations for future research.

  • Record URL:
  • Supplemental Notes:
    • This study was conducted at the Department of Civil and Architectural Engineering of the University of Wyoming, P.O. Box 3295, Laramia, Wyoming 82071-3295, and was funded by the U.S. Department of Transportation's University Transportation Centers Program.
  • Corporate Authors:

    Mountain-Plains Consortium

    North Dakota State University
    Fargo, ND  United States  58108
  • Authors:
    • Skaggs, R B
    • Edgar, T V
  • Publication Date: 1992-5


  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 142 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00639876
  • Record Type: Publication
  • Report/Paper Numbers: MPC Report No. 92-8
  • Files: TRIS
  • Created Date: Nov 30 1993 12:00AM