MOISTURE SENSITIVITY EVALUATION OF BINDER-AGGREGATE MIXTURES

This study assessed the moisture sensitivity of several binder-aggregate mixtures. This assessment included an evaluation of the effect of hydrated lime on the moisture sensitivity of asphalt-concrete mixtures, the effect of variations from the optimum binder content on the moisture sensitivity of asphalt-concrete mixtures, the moisture sensitivity of asphalt-rubber mixtures, and the potential use of controlled-strain fatigue beam testing to evaluate the moisture sensitivity of asphalt-concrete mixtures. Four aggregates, three asphalt contents, and two hydrated lime contents were used for the asphalt-concrete mixtures. The asphalt-rubber mixtures included asphalt-rubber gap-graded and dense-graded hot mix. Tests performed included AASHTO T283 and the controlled-strain fatigue beam test (Strategic Highway Research Program A-003A). It was found that hydrated lime in a slurry form could be effective in reducing moisture sensitivity of asphalt-concrete mixtures. The degree of its effectiveness was found to depend on asphalt content, lime contnet, and aggregate source. Also, it was found that a reduction in the binder content by 0.5% from the optimum could adversely affect the resistance to moisture damage. AASHTO T283 results showed that the asphalt-rubber mixtures may be more sensitive to moisture than conventional dense-graded asphalt-concrete mixtures. The fatigue beam test results indicated that the test had a potential use in moisture-sensitivity evaluation. The potential parameters were the flexural stiffness ratio and the fatigue life ratio.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1995/1492/1492-009.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=MOISTURE+SENSITIVITY+EVALUATION+OF+BINDER-AGGREGATE+MIXTURES&author=S.+Shatnawi&author=M.+Nagarajaiah&author=J.+Harvey&publication_year=1995
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1492, Hot-Mix Asphalt Design, Testing, Evaluation, 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
• Authors:
  • Shatnawi, Shakir
  • Nagarajaiah, Mahesh
  • Harvey, John T
  • 0000-0002-8924-6212
• Publication Date: 1995

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 71-84
• Monograph Title: Hot-mix asphalt design, testing, evaluation, and performance
• Serial:
  • Transportation Research Record
  • Issue Number: 1492
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt concrete; Asphalt content; Asphalt rubber; Binder content; Calcium hydroxide; Fatigue tests; Hot mix asphalt; Moisture content
• Identifier Terms: American Association of State Highway Officials; Strategic Highway Research Program
• Uncontrolled Terms: Moisture sensitivity
• Old TRIS Terms: Aashto t283; Shrp a-003a; Test results
• Subject Areas: Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00714835
• Record Type: Publication
• ISBN: 309061563
• Files: TRIS, TRB
• Created Date: Dec 4 1995 12:00AM