Existing design procedures for asphalt pavements attempt to preclude excessive rutting but are unable to predict its magnitude. This approach, though reasonably adequate in the past, is being strained more and more by ever increasing traffic loads and volumes on highways and airfields. A predictive design subsystem for rutting is an urgent requirement in the development of a more rational and comprehensive pavement design system. His paper firstly defines rutting and its mechanism on the basis of field evidence and then explores some of the structural and safety implications of rutting. Existing design technology for rutting is outlined and the deficiencies are examined. As well, some of the evolving technology, which is not yet operationally available for design, is considered. It is shown that the existing techniques, and the newer, non-operational methods,have some serious limitations. Suggestions are made for an approach based on developing a statistically derived, predictive model which uses materials characterization under simulated stress-time-temperature-load repetition states of the field. Some experimental results from research into this approach are presented. /AUTHOR/

  • Authors:
    • Morris, J
    • Haas, R C
  • Publication Date: 1972

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Filing Info

  • Accession Number: 00096458
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Aug 13 1975 12:00AM