Support Under Portland Cement Concrete Pavements

The project provided improved guidelines for consideration of structural support in the design of portland cement concrete pavements. Concrete pavement performance depends greatly on the support that it receives from the base course and underlying soil layers as well as other support-related factors such as erosion, curling, and warping. There is no general agreement among pavement engineers on how to select values for the modulus of subgrade reaction and the loss of support for use in design of rigid pavements and rigid pavement overlays. A perceived lack of adequate guidance in the American Association of State Highway and Transportation Officials (AASHTO) Guide for Design of Pavement Structures has resulted in inconsistent design practices for concrete pavements. Therefore, guidelines are needed to ensure proper consideration of support in pavement design. The project examined support concepts and causes of loss of support, reviewed related data from numerous field studies, adapted a three-dimensional finite element model to analyze the effects of support on pavement response to traffic and climatic conditions, and proposed guidelines for improving the consideration of support in the AASHTO design procedure for concrete pavements. National Cooperative Highway Research Program (NCHRP) Report 372 documents the work performed under this project.


  • English


  • Status: Completed
  • Contract Numbers:


  • Sponsor Organizations:

    National Cooperative Highway Research Program

    Transportation Research Board
    500 Fifth Street, NW
    Washington, DC  United States  20001

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590

    American Association of State Highway and Transportation Officials (AASHTO)

    444 North Capitol Street, NW
    Washington, DC  United States  20001
  • Performing Organizations:

    University of Illinois, Urbana-Champaign

    1406 W. Green Street
    Urbana, IL  United States  61801
  • Principal Investigators:

    Darter, Michael

  • Start Date: 19930101
  • Expected Completion Date: 0
  • Actual Completion Date: 19940930
  • Source Data: RiP Project 40337

Subject/Index Terms

Filing Info

  • Accession Number: 01575812
  • Record Type: Research project
  • Source Agency: Transportation Research Board
  • Contract Numbers: 01-30
  • Files: TRB, RiP
  • Created Date: Sep 11 2015 1:00AM