IRRECOVERABLE AND RECOVERABLE NONLINEAR VISCOELASTIC PROPERTIES OF ASPHALT CONCRETE
THE RESULTS ARE REPORTED OF A SERIES OF UNIAXIAL COMPRESSION CREEP TESTS OF AN ASPHALT MIXTURE UNDER CONSTANT LOADINGS, MULTIPLE-STEP LOADINGS, AND REPEATED LOADINGS OF AS MANY AS 100 CYCLES. IT HAS BEEN SHOWN THAT THE NONLINEAR VISCOELASTIC BEHAVIOR OF THE ASPHALT CONCRETE CAN BE REPRESENTED BY A NONLINEAR GENERALIZED KELVIN MODEL THAT CONSISTS OF A NONLINEAR DASH-POT CONNECTED IN SERIES WITH A NONLINEAR KELVIN CHAIN. THUS, THE NONLINEAR CREEP STRAINS ARE SEPARATED INTO IRRECOVERABLE AND RECOVERABLE STRAINS. IT HAS BEEN SHOWN THAT THE CONSITUTIVE EQUATION CAN BE DETERMINED BY THE USE OF BOTH THE CREEP AND THE RECOVERY PARTS OF THE CONSTANT LOADING CREEP TEST RESULTS. THE ACCURACY IN PREDICTING THE CREEP BEHAVIOR OF THE ASPHALT CONCRETE UNDER THE MULTIPLE-STEP LOADINGS AND THE REPEATED LOADINGS HAS BEEN SHOWN TO BE VERY SATISFACTORY. THE IMPORTANCE OF THE IRRECOVERABLE STRAINS TO THE PRACTICAL IMPLEMENTATION OF ASPHALT PAVEMENTS SUBJECTED TO TRAFFIC LOADING IS DISCUSSED. A POSSIBLE WAY OF RELATING THE IRRECOVERABLE STRAINS TO THE FATIGUE LIFE OF THE MATERIAL IS ALSO DISCUSSED.
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Supplemental Notes:
- Publication of this paper sponsored by Committee on Mechanical Properties of Bituminous Paving Mixtures. 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:
- Lai, James S
- Anderson, Douglas
- Publication Date: 1973
Media Info
- Media Type: Print
- Features: Figures; References;
- Pagination: pp 73-88
- Monograph Title: Asphalt and asphalt mix technology
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Serial:
- Highway Research Record
- Issue Number: 468
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Asphalt concrete; Compression; Creep properties; Fatigue (Mechanics); Forecasting; Load tests; Mathematical models; Viscoelasticity
- Uncontrolled Terms: Uniaxial compression
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00211883
- Record Type: Publication
- ISBN: 0309022541
- Files: TRIS, TRB
- Created Date: May 7 1974 12:00AM