EFFECT OF AGING ON FLOW PROPERTIES OF ASPHALTS
THE EFFECT OF AGING ON FLOW PROPERTIES OF THREE ASPHALTS OF DIFFERENT ORIGINS WAS STUDIED AT DIFFERENT TEMPERATURES. THE VARIABLES CONSIDERED INCLUDED: THE TYPE OF ASPHALT, THE DEGREE OF AGING, THE TEMPERATURE, AND THE SHEAR RATE. THE FLOW OF ASPHALTS WAS MEASURED BY THREE DIFFERENT VISCOMETERS AND THE AGING WAS DONE WITH A MODIFIED THIN FILM OVEN PROCEDURE. IN ORDER TO DETERMINE THE EXTENT OF CHANGE IN CHEMICAL COMPOSITIONS OF THE THREE ASPHALTS WITH THE CHANGE OF AGING, A LIMITED STUDY WAS PERFORMED TO DETERMINE THE CHANGE IN AVERAGE MOLECULAR WEIGHTS OF ASPHALTS, AND THEIR ASPHALTENE AND MALTENE COMPONENTS. THE RESULTS OF THIS STUDY SHOWED THAT: THE DEGREE OF AGING INFLUENCES THE NON- NEWTONIAN RESPONSE OF THE ASPHALTS, THE AGING OF THE ASPHALTS TO ANY DEGREE DOES NOT SEEM TO CHANGE THEIR AVERAGE MOLECULAR WEIGHTS SUBSTANTIALLY, AND A SIGNIFICANT CHANGE TAKES PLACE IN THE FLOW BEHAVIOUR AROUND THE SOFTENING POINT OF THE ASPHALTS. /AUTHOR/
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Supplemental Notes:
- Paper sponsored by Committee on Characteristics of Bituminous Materials and presented at the 46th 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.
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Authors:
- Moavenzadeh, F
- Stander Jr, R R
- Publication Date: 1967
Media Info
- Media Type: Digital/other
- Features: Appendices; Figures; References; Tables;
- Pagination: pp 1-29
- Monograph Title: Bituminous materials, mixes and construction
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Serial:
- Highway Research Record
- Issue Number: 178
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Asphalt; Asphaltene; Chemical analysis; Flow; Molecular weight; Oven tests; Shear rate; Softening point; Temperature; Thin films; Viscometers
- Uncontrolled Terms: Thin film oven test
- Old TRIS Terms: Aging; Maltene; Types
- Subject Areas: Highways; Materials;
Filing Info
- Accession Number: 00210613
- Record Type: Publication
- Files: TRIS, TRB
- Created Date: Sep 5 1994 12:00AM