MOISTURE SUSCEPTIBILITY BEHAVIOR OF ASPHALT CONCRETE AND EMULSIFIED ASPHALT MIXTURES USING THE FREEZE-THAW PEDESTAL TEST

Moisture-induced damage to asphalt concrete pavements, often attributable to stripping, is a recurrent problem because of the several variables involved. Many different tests are used to determine the moisture susceptibility of an asphalt mixture. Nevertheless, some are subjective and not suitable for evaluating individual aggregate components; whereas others have poor reproducibility, and no reasonable correlations with field performance can be obtained. At present many road test laboratories are using the Texas Boiling Test and Lottman's Tensile Strength Ratio. Plancher et al. have developed the Freeze-Thaw Pedestal Test, which is a simple laboratory test with a high degree of reproducibility. This test maximizes the effects of moisture at extreme temperatures and minimizes the effects of the mechanical properties of the mix (interlocking, density, gradation, etc.). Tests were conducted using different aggregates and types of bitumen: paving grade asphalt cement AC 70/100 and two types of asphalt emulsions--anionic slow-setting and cationic slow-setting. Results from these studies show the potential of this test in determining the susceptibility of cold and hot asphalt mixtures to moisture damage.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1989/1228/1228-002.pdf
• Record URL:
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1228, Asphalt Mixtures and Asphalt Chemistry. 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:
  • Polzan, Pablo E
• Publication Date: 1989

Media Info

• Features: Photos; References; Tables;
• Pagination: p. 9-16
• Monograph Title: Asphalt mixtures and asphalt chemistry
• Serial:
  • Transportation Research Record
  • Issue Number: 1228
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Asphalt concrete; Cold mix paving mixtures; Emulsified asphalt; Freeze thaw tests; Hot mix asphalt; Moisture content; Test procedures
• Uncontrolled Terms: Moisture susceptibility; Reproducibility
• Subject Areas: Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 00495083
• Record Type: Publication
• ISBN: 0309048230
• Files: TRIS, TRB
• Created Date: Jun 30 1990 12:00AM