ASPHALT RHEOLOGY IN THE NEAR-TRANSITION TEMPERATURE RANGE
THIS PAPER PROVIDES INFORMATION ON SOME 35 ASPHALTS OF VARIOUS TYPES AND SOURCES IN THE SERVICE TEMPERATURE RANGE FROM 5 C (40 F) TO 60 C (140 F). DATA WERE PRESENTED ON THE PENETRATION, DUCTILITY, AND VISCOSITY FOR THIS TEMPERATURE RANGE IN AN EFFORT TO EXPLAIN IN DEPTH CERTAIN PECULIARITIES IN ASPHALT BEHAVIOR AND THE EMPIRICAL TESTS. THIS WAS DONE THROUGH A STUDY OF THE VISCOSITY TEMPERATURE SUSCEPTIBILITY IN WHICH EMPHASIS WAS PLACED ON THE LOWER TEMPERATURE AND ON COMPARISONS OF THE DIFFERENT HARDENING EFFECTS CAUSED BY LOWERING THE TEMPERATURE. THIS COULD BE OF SIGNIFICANCE IN CONNECTION WITH CRACKING OF PAVEMENTS, FOR RECENT INVESTIGATORS HAVE BEEN EMPHASIZING THE VARIATIONS IN PAVEMENT PERFORMANCE AS RELATED TO ASPHALT SOURCES. ANOTHER STUDY OF THIS REPORT RELATES TO THE PROPOSED CARRE AND LAURENT RELATION BETWEEN PENETRATION AND VISCOSITY AT VARIOUS TEMPERATURE LEVELS. IT WAS SHOWN THAT THIS RELATION HAS A LIMITED USEFULNESS WITH RESPECT TO SENSITIVITY OF VISCOSITY MEASUREMENTS BECAUSE THE VARIABILITY MAY BE SHOWN TO EXCEED PLUS OR MINUS 25 PERCENT. THE ANALYSIS INCLUDED COMPARATIVE DATA WITH THE SLIDING-PLATE, FLORIDA CAPAILLARY, AND CONE-PLATE METHODS. FURTHER INFORMATION IN THE PAPER REPORTS ON THE EMPIRICISM OF THE DUCTILITY TESTS AND ITS RELATION TO ABSOLUTE VISCOSITY MEASUREMENTS. COMPARISONS WITH PREVIOUS DATA OF OTHER INVESTIGATORS ARE SHOWN. THE GROWING TREND IN ASPHALT TECHNOLOGY TO RECOGNIZE THE INADEQUACIES OF THE OLD EMPIRICAL TESTS AND TO USE NEW TECHNIQUES IS CONFIRMED IN THIS PAPER.
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Availability:
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Supplemental Notes:
- Publication of this paper sponsored by Committee on Characteristics of Aggregates 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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Discussers:
- Davis, R L
- Publication Date: 1973
Media Info
- Media Type: Print
- Features: Figures; References; Tables;
- Pagination: pp 1-15
- Monograph Title: Asphalt and asphalt mix technology
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Serial:
- Highway Research Record
- Issue Number: 468
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Asphalt; Ductility; Pendulum tests; Rheology; Temperature; Viscosity
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00211884
- Record Type: Publication
- ISBN: 0309022541
- Files: TRIS, TRB
- Created Date: May 7 1974 12:00AM