The coupling mechanisms relating experience to theoretical analysis are briefly discussed. An annotated design procedure is presented as a guide for pavement designers. Design nomographs account for a wide range of input parameters and permit the designer a wide choice of alternative thickness designs. Details are given of the development of the design procedure. The controlling empirical model involved 3 parameters and 3 layers. The necessary input assumptions are listed. These assumptions relate to the modulus of elasticity of layer 1 and layer 2, Poisson's ratio of layer 1 and of layer 2, the modulus of elasticity and Poisson's ratio of layer 3, and tire pressure. The derivation of the fatigue criterion is summarized and details are given of the design procedure. For the determination of pavement thicknesses from the nomographs similar to those presented here, one must know EAL'S and CBR of the subgrade soil, and the modulus of elasticity of the asphaltic concrete. Such a set of nomographs permits selection of pavement structures employing alternative proportions of bituminous concrete and crushed stone base. Total thickness varies according to the proportion chosen. It is implicitly intended that the final selection also be based on additional engineering considerations such as estimates of comparative construction costs, compatibility of cross-sectional template and shoulder designs, uniformity of design practices, highway system classifications, engineering precedence, and utilization of indigenous resources. The nomographs represent theoretical extensions of conventional designs and, from a theoretical standpoint, provide equally competent structures.

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    • 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:
    • Havens, James H
    • Deen, Robert C
    • Southgate, Herbert F
  • Conference:
  • Publication Date: 1973

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 130-142
  • Serial:

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Filing Info

  • Accession Number: 00272012
  • Record Type: Publication
  • ISBN: 030902160X
  • Files: TRIS, TRB, ATRI
  • Created Date: Sep 19 1974 12:00AM