A COMPREHENSIVE CONSTITUTIVE MODEL FOR GRANULAR MATERIALS IN FLEXIBLE PAVEMENT STRUCTURES

This paper summarizes research leading to the development of a comprehensive constitutive modeling approach for granular bases, subbases, and subgrade soils. The model that was developed is based on the flow theory of plasticity. It rationally considers both the resilient and permanent deformation response, and accounts for the effects of repeated loading and saturation and drainage conditions. The model can be used to predict pavement performance, to select pavement layer thicknesses to resist permanent deformations, and to select material properties to assure adequate performance. This paper describes the conceptual model development. It also presents results from a laboratory evaluation of the constitutive model using three materials covering the range of materials typically classified as granular in pavement construction. Finally, the modeling concepts are applied to practical pavement design problems.

• Supplemental Notes:
  • This conference was arranged by the International Society for Asphalt Pavements. The ninth conference will be held in Copenhagen, Denmark in August 2002.
• Corporate Authors:

  University of Washington, Seattle

  Department of Civil and Environmental Engineering, P.O. Box 352700
  Seattle, WA  United States  98195-2700
• Authors:
  • Bonaquist, R F
  • Witczak, M W
• Conference:
  • Eighth International Conference on Asphalt Pavements
  • Location: Seattle, Washington
  • Date: 1997-8-10 to 1997-8-14
• Publication Date: 1997

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 783-802

Subject/Index Terms

• TRT Terms: Base course (Pavements); Deformation; Drainage; Flexible pavements; Granular materials; Mathematical models; Percent saturation; Repeated loads; Subbase (Pavements); Subgrade (Pavements)
• Subject Areas: Geotechnology; Highways; Hydraulics and Hydrology; I42: Soil Mechanics;

Filing Info

• Accession Number: 00764693
• Record Type: Publication
• Report/Paper Numbers: Volume I
• Files: TRIS, ATRI
• Created Date: Jun 11 1999 12:00AM