PRECISION OF METHODS FOR DETERMINING ASPHALT CEMENT CONTENT

Two data bases provided the statistical information necessary to determine the precision of individual methods of extraction testing with various solvents. Results of this investigation showed no statistical difference between either centrifuge, reflux, or vacuum extraction methods, regardless of the type of solvent used for the test. This precision corroborated the statistics reported in ASTM D2172. Data bases for determining the precision of nuclear asphalt content gauges were created through extensive testing by the University of Nevada-Reno and round robin testing by eight state laboratories. Results from this testing developed a precision statement for ASTM D4125 (nuclear asphalt content gauges). A comparison between the statistics from traditional extraction methods and the nuclear gauges showed that when determining the asphalt content of mixtures with absorptive aggregates (absorption capacity greater than 2.5%) the nuclear gauges appear to be significantly more accurate. Further testing with the nuclear gauges indicated three conclusions. First, the sample temperature did not influence test results when included in the software of the gauges. Second, asphalt content could be determined when mixtures contained latex and polyolefin additives. Third, changes in the gauge environment influenced test results.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1989/1228/1228-018.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=PRECISION+OF+METHODS+FOR+DETERMINING+ASPHALT+CEMENT+CONTENT&author=M.+Stroup-Gardiner&author=D.+Newcomb&author=J.+Epps&publication_year=1989
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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:
  • Stroup-Gardiner, Mary
  • Newcomb, David E
  • Epps, Jon A
• Publication Date: 1989

Media Info

• Features: References; Tables;
• Pagination: p. 156-167
• 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: Accuracy; Alternatives analysis; Asphalt content; Centrifuges; Fluxes; Nuclear gages
• Old TRIS Terms: Refluxing; Vacuum extraction
• 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: 00495099
• Record Type: Publication
• ISBN: 0309048230
• Files: TRIS, TRB, ATRI
• Created Date: Jun 30 1990 12:00AM