RUT DEPTH PERCEPTION
This paper describes a method for the prediction of rut depth in asphalt pavements that is based on a combined mechanistic-empirical approach. Three methods, viscoelastic, elastoplastic and linear-elastic, were originally evaluated. The viscoelastic methods are under study by the Federal Highway Administration. The elastoplastic procedures offer the best longrange solution, but cannot yet be implemented for a multilayered structure such as an asphalt pavement. Therefore, this paper concentrates on linear-elastic procedures to relate the various mechanistic responses, stress, strain, and deformation to the rate of rutting observed on 32 sections at the AASHO Road Test. The rate of rutting was influenced by the season of the year and the number of years for which traffic is applied. Correlations with the surface deflection, the vertical compressive stress in the asphalt concrete, the vertical strain in the subgrade, and the traffic previouly applied to the section were obtained. Correlations could be obtained by converting heavy axle loads to equivalent 80-kN (18,000-lbf) single-axle loads using AASHO load equivalency values. The prediction model inlcudes calculations for estimating rut depth in terms of reliabilty. /Author/
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309025958
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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
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Authors:
- Saraf, C L
- Smith, W S
- Finn, F N
- Publication Date: 1976
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 9-14
- Monograph Title: Soil mechanics: rutting in asphalt pavements, embankments on varved clays and foundations
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Serial:
- Transportation Research Record
- Issue Number: 616
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Asphalt pavements; Axle load force; Deflection; Deformation; Depth; Elastic analysis; Forecasting; Mathematical models; Pavements; Ruts (Pavements); Seasons; Strain (Mechanics); Stresses; Subgrade (Pavements)
- Uncontrolled Terms: Models; Rut
- Old TRIS Terms: Elastic analysis (Structural); Pavement deflection; Strains
- Subject Areas: Geotechnology; Highways; Pavements;
Filing Info
- Accession Number: 00162989
- Record Type: Publication
- ISBN: 0309025958
- Files: TRIS, TRB
- Created Date: Oct 13 2000 12:00AM