A semi-empirical method for the design of flexible road pavements is presented. It is based on the research conducted through the Institute of Engineering (experimental test roads, evaluation of existing highways, and circular test-track) from 1962 to 1973. The method assumes that the road structure is properly simulated by a multilayer solid of uniform relative strength, in which the logarithm of the strength (CBR sub z) is proportional to the logarithm of the cumulative number of 8.2 ton single axle loads (Sigma/L). The experimental correlation is highly satisfactory. Failure conditions under equivalent cumulative traffic (Sigma/L) are stated in terms of (sigma sub z); where sigma sub z represents the vertical stress corresponding to the ultimate bearing capacity at depth (z). For design purposes, life to failure (Sigma/L) is defined by the conditons CBR sub z, z). Design curves (Appendix B) include numerous variables, which should be analyzed within a general framework to reach economic solutions. It is considered that the method is reliable and it is not difficult to employ. In the course of the application of the method, and in light of the research in progress, necessary adjustments may be made. /Author/

  • Supplemental Notes:
    • Paper presented at the 15th World Highway Congress, Permanent International Association of Road Congresses, Question II: Flexible Pavements, Mexico, October, 1975.
  • Corporate Authors:

    Autonomous National University of Mexico

    Engineering Institute, Ciudad Universitaria
    Mexico City 20,   Mexico 
  • Authors:
    • Corro, S
  • Publication Date: 1978-10

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 39 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00193530
  • Record Type: Publication
  • Report/Paper Numbers: E-35
  • Files: TRIS
  • Created Date: May 26 1979 12:00AM