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Title: ASPHALT HARDENING IN EXTRACTION SOLVENTS
Accession Number: 00622190
Record Type: Component
Availability: Find a library where document is available Abstract: Hardening occurs in asphalts during extraction and recovery, posing a serious problem for research into the properties of hot-mix and road-aged asphalts. Hardening appears to occur in all solvents and, to varying degrees, in all asphalts. The effects of light, oxygen, and temperature on this phenomenon were investigated. All are significant, and the data indicate that reflux methods of extraction should be avoided when the properties of the extracted material are to be investigated. The mechanism of the hardening is still unclear. Infrared spectra show definite chemical changes, but these are quite asphalt-dependent and do not relate clearly to changes in viscosity.
Supplemental Notes: This paper appears in Transportation Research Record No. 1323, Asphalt Mix Materials 1991. 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
Monograph Title: Monograph Accession #: 01407199
Authors: Burr, B LDavison, R RJemison, H BGlover, C JBullin, J APagination: p. 70-76
Publication Date: 1991
Serial: ISBN: 0309051630
Features: Figures
(13)
; References
(12)
; Tables
(1)
TRT Terms: Old TRIS Terms: Subject Areas: Highways; Materials; I31: Bituminous Binders and Materials
Files: TRIS, TRB, ATRI
Created Date: May 31 1992 12:00AM
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