EVALUATION OF INDIRECT TENSILE TESTS FOR ASSESSING STRIPPING OF ALABAMA ASPHALT CONCRETE MIXTURES

Stripping in asphalt concrete has long been recognized as a cause of premature damage. Yet, after many years of research and application, there are few generally accepted conclusions about the severity of the problem, the nature and causes of the process, or methods for evaluating stripping. The evolution of test procedures for assessing stripping potential appears to be progressing toward procedures that measure strength loss of moisture-conditioned mixtures compacted to 6 to 8 percent voids. Indirect tensile tests were performed on asphalt concrete mixes composed of materials common in Alabama. The purpose of these tests was to study the stripping process and to evaluate the test procedure for assessing stripping potential. Results indicate that published moisture-conditioning procedures produce variable strength loss but that either of the two procedures evaluated is acceptable. Results also indicate that asphalt cement content, as well as type of mix, has a significant influence on test results and that generalities concerning stripping potential of aggregate sources, types, and blends are not valid. Finally, test results did not distinctly delineate reported stripping and nonstripping aggregate combinations. Reasons may be that the reported performance of an aggregate combination is not valid for all mix types, or that the test is not a positive indicator of stripping potential. The former is more likely, but incorrect predictions for specific mixes are a definite possibility. Implications are that specific mix designs must be tested and results conservatively interpreted until field performance studies permit further refinements.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1987/1115/1115-011.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=EVALUATION+OF+INDIRECT+TENSILE+TESTS+FOR+ASSESSING+STRIPPING+OF+ALABAMA+ASPHALT+CONCRETE+MIXTURES&author=F.+Parker&author=F.+GHARAYBEH&publication_year=1987
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• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Characteristics of Bituminous Paving Mixtures to Meet Structural Requirements.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:
  • Parker Jr, Frazier
  • Gharaybeh, Fouad A
• Conference:
  • 66th Annual Meeting of the Transportation Board
  • Location: Washington District of Columbia, United States
  • Date: 1987-1-12 to 1987-1-15
• Publication Date: 1987

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 113-124
• Monograph Title: Asphalt Materials and Mixtures
• Serial:
  • Transportation Research Record
  • Issue Number: 1115
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Air voids; Asphalt cement; Asphalt concrete; Mix design; Strength of materials; Stripping (Pavements); Tension tests; Test procedures
• Uncontrolled Terms: Indirect tensile test
• Old TRIS Terms: Air voids content; Test results
• Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00467876
• Record Type: Publication
• ISBN: 0309044603
• Files: TRIS, TRB, ATRI
• Created Date: Mar 31 1988 12:00AM