ASPHALT CEMENT VISCOSITIES AT AMBIENT TEMPERATURES BY A RAPID METHOD
THIS PAPER DESCRIBES A METHOD FOR DETERMINING THE APPARENT VISCOSITY AND SHEAR SUSCEPTIBILITY OF ASPHALT CEMENTS AT 25 DEG. C AND OTHER AMBIENT TEMPERATURES. ALTHOUGH IT IS BASED ON ANOTHER STUDY, THE PRESENT WORK UTILIZES A MODIFIED BARREL AND SAMPLE HOLDER TO PERMIT IMPROVED PRODUCTIVITY IN RUNNING TESTS. A MODIFIED PLUNGER IS USED THAT ELIMINATES CERTAIN INTERFERENCES. APPARENT VISCOSITY IS EVALUATED AT A SELECTED SHEAR RATE, AND SHEAR SUSCEPTIBILITY IS MEASURED BY THE COMPLEX FLOW INDEX THAT IS THE EXPONENT IN THE POWER LAW EQUATION FOR NON-NEWTONIAN FLUIDS. IT IS BELIEVED THAT THE PROPOSED METHOD IS ADAPTABLE FOR A ROUTINE TESTING PROCEDURE BY USING CAREFULLY STANDARDIZED CAPILLARIES AND MORE SENSITIVE LOAD CELLS WITH SOPHISTICATED TEMPERATURE CONTROL. WHEN SUCH A TEST IS DEVELOPED BY COOPERATIVE EFFORT, IT IS BELIEVED IT WOULD REPLACE THE PENETROMETER AND OTHER EMPIRICAL FLOW TESTS TO PROVIDE RHEOLOGICAL INFORMATION OF PRACTICAL VALUE FOR EXPLAINING SERVICE BEHAVIOR. IN FACT, SUCH INFORMATION SHOULD BE USEFUL IN DESIGN FOR APPLICATIONS WHERE RHEOLOGY OF THE ASPHALT COMPONENT IS A CRITICAL FACTOR. /AUTHOR/
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Supplemental Notes:
- Sponsored by Committee on Characteristics of Bituminous Materials. 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.
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Authors:
- Schweyer, Herbert E
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Conference:
- 51st Annual Meeting of the Highway Research Board
- Location: Washington District of Columbia, United States
- Date: 1972-1-17 to 1972-1-21
- Publication Date: 1972
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 86-96
- Monograph Title: Asphalt mixture characterization and asphalt grading
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Serial:
- Highway Research Record
- Issue Number: 404
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Asphalt cement; Capillaries; Load cells; Methodology; Shear rate; Shear strength; Temperature; Viscosity
- Uncontrolled Terms: Flow index
- Old TRIS Terms: Plungers
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00211775
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Apr 2 1973 12:00AM