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Title: THICKNESS DESIGN FOR FLEXIBLE PAVEMENT: A PROBABILISTIC APPROACH
Accession Number: 00472238
Record Type: Component
Availability: Find a library where document is available Abstract: The thickness design procedure presented in this paper makes use of the concepts of limiting subgrade strain to control permanent deformation and limiting tensile strain in the asphalt layer (or limiting tensile stress in the cement-treated layer, if applicable) to control fatigue cracking. The input variables such as traffic load, ambient temperature, and subgrade resilient modulus are considered stochastic. The design nomographs incorporate reliability in design (50, 65, 80, and 95 percent), which is a unique feature of the method adopted here. Design nomographs are prepared for structural sections that consist of an asphalt concrete surface and a base of the designer's choice (asphalt treated, dense-graded aggregate, or cement treated) placed directly on the subgrade. A rational method for selecting asphalt grade is an integral part of the design procedure. The asphalt selection criteria dictate the use of relatively low-stiffness bituminous mixtures in cold climates and high-stiffness mixtures in hot climates. The region-to-region modulus variation, however, is accounted for by the judicious use of a multiplying factor that would transform the nomograph thickness to the "true" design value. To assess the reasonableness of the proposed procedure, the design thickness has been compared with that of the revised AASHO guide and with the Thickness Design Manual (MS-1) of the Asphalt Institute.
Supplemental Notes: Publication of this paper sponsored by Committee on Flexible 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
Monograph Title: Monograph Accession #: 01418823
Authors: George, K PHusain, SPagination: pp 26-36
Publication Date: 1986
Serial: ISBN: 0309041155
Media Type: Print
Features: Figures
(9)
; Maps
(1)
; References
(19)
; Tables
(4)
TRT Terms: Old TRIS Terms: Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces
Files: TRIS, TRB
Created Date: Aug 31 1987 12:00AM
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