EFFECTS OF LABORATORY SPECIMEN PREPARATION ON AGGREGATE-ASPHALT STRUCTURE, AIR-VOID CONTENT MEASUREMENT, AND REPETITIVE SIMPLE SHEAR TEST RESULTS

Effects of laboratory compaction devices (rolling wheel, gyratory, and kneading) on asphalt aggregate structure is investigated using image analysis of plane sections cut from specimens. Also investigated are the effects of specimen surface condition (both as-compacted and cut and cored) on air-void structure, air-void content measurement, and repetitive simple shear test-constant height (RSST-CH) results. Image analysis indicates that gyratory compaction produces less aggregate orientation than rolling wheel compaction, and little or no orientation in aggregates that do not have a flaky shape. Image analysis also reveals that the outer periphery of as-compacted specimens has a different air-void and aggregate structure than that found in the specimen interior. Other results from air-void content measurements of gyratory and rolling wheel specimens at different stages of cutting and coring showed that there is little air-void content gradient in specimens that have been cored and cut from larger compacted masses. In addition, it was learned that RSST-CH results for as-compacted and cut and cored specimens cannot be compared because of problems with air-void content measurement and cut and uncut aggregates' different responses to shear stress at the specimen surface.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1994/1454/1454-014.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=EFFECTS+OF+LABORATORY+SPECIMEN+PREPARATION+ON+AGGREGATE-ASPHALT+STRUCTURE%2C+AIR-VOID+CONTENT+MEASUREMENT%2C+AND+REPETITIVE+SIMPLE+SHEAR+TEST+RESULTS&author=J.+Harvey&author=K.+Eriksen&author=J.+Sousa&author=C.+Monismith&publication_year=1994
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309060621
• 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
• Authors:
  • Harvey, John T
  • 0000-0002-8924-6212
  • Eriksen, Kirsten
  • Sousa, Jorge
  • Monismith, Carl L
• Publication Date: 1994

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 113-122
• Monograph Title: Asphalt concrete mixture design and performance
• Serial:
  • Transportation Research Record
  • Issue Number: 1454
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Accelerated tests; Air voids; Asphalt mixtures; Compaction; Image analysis; Image processing; Shear tests; Specimens
• Uncontrolled Terms: Asphalt-aggregate interface; Laboratory compaction; Preparation
• Old TRIS Terms: Air voids content
• 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: 00676642
• Record Type: Publication
• ISBN: 0309060621
• Files: TRIS, TRB, ATRI
• Created Date: Apr 21 1995 12:00AM