Presently there are no overlay design procedures or criteria for determining the structural value of existing pavement and its remaining life and for evaluating how the layers will function in an overlaid pavement. Furthermore, none considers fatigue, a primary failure mode or mechanism. Recently, Austin Research Engineers, Inc., under a Federal Highway Administration contract, developed a design procedure using elastic layered theory in an analytical model for overlays of rigid pavements which takes these factors into account. The procedure includes a computer program, RPOD1, which performs various aspects of the analysis required for the design. Depending on the type of existing surface conditions, void, bond, and materials used in the overlays, 22 combinations of pavements and overlays are possible. RPOD1 involves nearly 17 independent variables and the final response is the overlay thickness suitable for the projected traffic. This report describes a sensitivity analysis to establish the relative importance of the independent variables to the response, i.e., the required thickness. For the analysis, the standard deviation is selected as a basis of sensitivity to facilitate interpretation of the final results. Based on the study of the sensitivity, it is recommended that the method be adapted for use in the Texas State Department of Highways and Public Transportation.

  • Supplemental Notes:
    • Prepared in cooperation with Texas State Dept. of Highways and Public Transportation, Austin. Transportation Planning Div.
  • Corporate Authors:

    University of Texas, Austin

    Center for Highway Research, 200 West 21st Street
    Austin, TX  United States  78712

    Texas State Department of Highways & Public Transportation

    Transportation Planning Division, P.O. Box 5051
    Austin, TX  United States  78763

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Nayak, B C
    • Hudson, W R
    • McCullough, B F
  • Publication Date: 1977-6

Media Info

  • Pagination: 148 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00181429
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-TX-RR-177-11, CFHR-3-8-75-177-11, Interim Report
  • Created Date: Oct 12 2002 12:00AM