PROCEDURE FOR PREDICTING RUT DEPTHS IN FLEXIBLE PAVEMENTS

This paper presents a procedure for calculating rut depths in flexible pavements, based on models developed from laboratory experiments that simulate field conditions. The stud found that the simulation of field conditions in dynamic triaxial tests is a reliable means for measuring the permanent deformation characteristics of both asphalt-bound and unbound granular base materials under a variety of conditions. A statistically based experimental program that used these testing procedures provided the basis for the development of rut depth prediction models. These models were verified by comparison with actual field measurements. Layer equivalencies can also be used in the models to convert sections to either equivalent full-depth or equivalent granular base. From these results, a simple regression equation was developed that predicts rut depths at the test roads with good agreement. The models have been used to evaluate the effects of a wide range of equivalent full-depth thicknesses and in full-depth layer moduli. The results suggest that, for given levels of traffic, there may be an optimum thickness, but a wide range of the modulus has little effect on the rut depth. The simple regression equation can be incorportated into design procedures to analyze rut depths of possible alternatives.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1976/616/616-008.pdf
• Summary URL:
  https://scholar.google.com/scholar_lookup?title=PROCEDURE+FOR+PREDICTING+RUT+DEPTHS+IN+FLEXIBLE+PAVEMENTS&author=F.+Meyer&author=R.+Haas&author=M.+Dharmawardene&publication_year=1976
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309025958
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Strength and Deformation Characteristics of Pavement Sections. 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
• Authors:
  • Meyer, Frank
  • Haas, Ralph
  • Dharmawardene, MWW
• Publication Date: 1976

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: pp 38-40
• Monograph Title: Soil mechanics: rutting in asphalt pavements, embankments on varved clays and foundations
• Serial:
  • Transportation Research Record
  • Issue Number: 616
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt pavements; Base course (Pavements); Deformation; Depth; Flexible pavements; Forecasting; Full-depth asphalt pavements; Granular materials; Mathematical models; Pavement design; Pavements; Regression analysis; Ruts (Pavements); Thickness; Traffic volume; Triaxial shear tests
• Uncontrolled Terms: Models; Pavement thickness; Rut
• Subject Areas: Data and Information Technology; Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00162995
• Record Type: Publication
• ISBN: 0309025958
• Files: TRIS, TRB
• Created Date: Oct 13 1977 12:00AM