CRITERIA FOR EVALUATION OF RUTTING POTENTIAL BASED ON REPETITIVE UNIAXIAL COMPRESSION TEST
Tests conducted following the mix design stage are unable to assess the rutting potential of asphalt concrete pavements. They range from moving a rubber tire on a slab and monitoring the rut depth to large-scale field tests using accelerated loading facilities. The Strategic Highway Research Program (SHRP) has proposed evaluating induced damage by determining the accumulated permanent shear strains based on a repetitive simple shear (constant height) test. An investigation conducted at the Centre for Surface Transportation Technology of the National Research Council of Canada is aimed at developing a criterion for measuring rutting potential. A repetitive uniaxial compression test was used to determine accumulated permanent axial strain. Tests were conducted on cores recovered from the field and others compacted in the laboratory using a SHRP gyratory compactor. Test results indicate that the accumulated permanent axial strain undergoes three distinct stages: strain-hardening (volume change), shear flow, and, finally, fracture failure. During the secondary stage (shear flow) the rate of accumulation of permanent axial strain is constant and is sensitive to the asphalt mix's resistance to rutting. Performance-related testing of the mix's resistance to potential rutting was carried out at different temperatures. Based on a proposed rutting criterion, one focused on the constant rate of permanent axial strain, the SHRP gyratory compactor simulates field compaction reasonably well. The influence of sample height, applied pressure, and compaction effort on the proposed rutting criterion also was investigated.
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Availability:
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Supplemental Notes:
- This paper appears in Transportation Research Record No. 1454, Asphalt Concrete Mixture Design and Performance. 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:
- Mohamed, El Hussein H
- Yue, Zhongqi
- Publication Date: 1994
Language
- English
Media Info
- Features: Figures; Photos; References; Tables;
- Pagination: p. 74-81
- Monograph Title: Asphalt concrete mixture design and performance
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Serial:
- Transportation Research Record
- Issue Number: 1454
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Asphalt pavements; Core samples; Evaluation; Flow; Fracture mechanics; Rutting; Shear rate; Strain (Mechanics); Strain hardening; Temperature
- Uncontrolled Terms: Axial strain; Criteria; Shear flow
- Old TRIS Terms: Core analysis; Repetitive uniaxial compression test; Rutting potential; Test results
- Subject Areas: Highways; Pavements; I23: Properties of Road Surfaces;
Filing Info
- Accession Number: 00676638
- Record Type: Publication
- ISBN: 0309060621
- Files: TRIS, TRB, ATRI
- Created Date: Apr 21 1995 12:00AM