The structural deterioration of a flexible pavement is normally associated with cracking of the bituminous surface course and development of ruts in the wheel paths. The design procedure presented by Barker and Brabston treats these two modes of deterioration through limiting values of certain response parameters or through accounting for cumulative damage according to Miner's hypothesis. The required response parameters, the subgrade strain and the tensile strains in the structural layers, are computed by using a layered elastic computer program; thus, the procedure can handle in a rational manner the possible variations in the properties of different pavement materials. The use of the cumulative-damage concept also permits including in a rational manner the variations in the bituminous-concrete properties and the subgrade strengths caused by cyclic climatic conditions. The design system has subsystems of initial thickness, climate, traffic, material properties, performance, pavement response, and thickness modification. Each of the subsystems uses specific input and generates output that is used by the other subsystems. At present, the subsystems are simple, but the entire design system has been developed so that all the necessary information is available for the design of three types of flexible pavement: conventional, bituminous concrete, and chemically stabilized. These represent nearly all flexible pavements being constructed at this time. /Author/

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    • This paper appeared in TRB Special Report 175, Research in Airport Pavements. 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
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    Transportation Research Board

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  • Authors:
    • Barker, Walter A
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  • Publication Date: 1978

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  • Media Type: Print
  • Features: References;
  • Pagination: pp 45-46
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  • Accession Number: 00189927
  • Record Type: Publication
  • Files: TRIS, TRB, ATRI
  • Created Date: May 11 1979 12:00AM