GENERAL DISCUSSION OF VISCOSITY GRADING OF ASPHALTS

THE GRADING OF ASPHALT PERFORMANCE USING VISCOSITY TESTS IS DISCUSSED. THE VARIATION OF CONSISTENCY VALUES AT DIFFERENT SHEAR RATES AT LOW TEMPERATURES, WHERE ASPHALT CEMENTS ARE SHEAR SUSCEPTIBLE, POINTS TO THE NEED FOR NEW METHODS FOR DETERMINING THE LOW TEMPERATURE PROPERTIES OF ASPHALT CEMENTS. THE AUTHOR LISTS THE IMPORTANT RHEOLOGICAL PROPERTIES AFFECTING THE FINISHED PAVEMENT AS THE VISCOSITY OF THE BINDER AT: (1) THE MIXING TEMPERATURE. (2) THE COMPACTION TEMPERATURE. (3) THE HIGHEST PAVEMENT SERVICE TEMPERATURE AND (4) THE LOWEST PAVEMENT SERVICE TEMPERATURE. A RECOMMENDATION IS MADE FOR AN ASPHALT CEMENT SPECIFICATION SETTING VISCOSITY LIMITS AT 140 F OR SOME OTHER HIGH TEMPERATURE AND TO SET A MAXIMUM LOW TEMPERATURE AT WHICH THE BINDER MUST PERFORM SATISFACTORILY IN A PAVEMENT ACCORDING TO AN UNDEVELOPED LOW TEMPERATURE TEST METHOD.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1971/350/350-006.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309019621
• Supplemental Notes:
  • Sponsored by Committee on Characteristics of Bituminous Materials and presented at the 50th Annual Meeting. 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:
  • Davis, R J
  • Fromm, H J
  • Phang, W A
• Conference:
  • 50th Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1971-1-18 to 1971-1-22
• Publication Date: 1971

Media Info

• Media Type: Digital/other
• Pagination: pp 62-63
• Monograph Title: Symposium on viscosity grading of asphalts
• Serial:
  • Highway Research Record
  • Issue Number: 350
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Asphalt cement; Asphalt pavements; Binders; Classification; Low temperature; Low temperature tests; Rheological properties; Shear tests; Soil penetration test; Specifications; Temperature; Viscosity
• Old TRIS Terms: Viscosity test
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211686
• Record Type: Publication
• ISBN: 0309019621
• Files: TRIS, TRB
• Created Date: Oct 3 1971 12:00AM