SUMMARY DISCUSSION

The papers presented at the symposium on the Structural Design of Asphalt Concrete Pavements are summarized. Advances made in the understanding and prediction of pavement failure are impressive. Modes of failure such as rutting and roughness have also been covered. The many factors (environment, traffic, material properties, construction variables, maintenance variables and economics) and the variables associated with those factors have prompted the Federal Highway Administration to strive toward a probabilistic or stochastic approach to design. Layered systems analysis is discussed. The technical terms and criteria used in fatigue analysis of pavement performance have been defined by one author who also stated that the slope of the fatigue line (fatigue characteristic) appears to depend on the stiffness characteristics of the mix and the nature of the binder. Information has also been provided concerning input variables, how they should or should not be obtained and how they may be used in the design system. A design process has been outlined and the degree of cracking that could be detrimental is pointed out. Methodology in the development of a design procedure for airfield pavements is presented. The coupling mechanisms relating experience to theoretical analyses are discussed. Conclusions formed on the basis of a study on the subject of this symposium are presented. Much of the information presented at this symposium will be used in the development of a modular system. The fatigue concept will be a modular subsystem with a fracture mechanics module as an alternative; elastic and viscoelastic stress analysis and strain computation modules will be included. These alternatives will be tried in actual design and comparison will be made in highway designs, test tracks and other accelerated test facilities.

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  • Supplemental Notes:
    • Appeared in Structural Design of Asphalt Concrete Pavements to Prevent Fatigue Cracking. Proceedings of a Symposium held January 22, 1973. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
  • Corporate Authors:

    Highway Research Board

    2101 Constitution Avenue, NW
    Washington, DC    20418
  • Authors:
    • McMahon, T F
  • Conference:
  • Publication Date: 1973

Media Info

  • Media Type: Print
  • Pagination: pp 197-200
  • Monograph Title: STRUCTURAL DESIGN OF ASPHALT CONCRETE PAVEMENTS TO PREVENT FATIGUE CRACKING
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00272019
  • Record Type: Publication
  • ISBN: 030902160X
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 19 1974 12:00AM