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Title: CONSTITUTION AND CHARACTERIZATION OF PAVING ASPHALTS
Accession Number: 00211341
Record Type: Component
Abstract: RESULTS ARE PRESENTED OF ANALYSES WITH ASPHALTS OF VARIOUS COMPOSITION AND DERIVATION. THE OBJECTIVE OF THE STUDY IS TO DEFINE AND CORRELATE CONSTITUTION AND FUNDAMENTAL CHARACTER OF ASPHALTS IN A MANNER SIGNIFICANT TO THEIR USE IN HIGHWAY PAVEMENTS. FURTHER CONFIRMATION OF THE EXISTENCE OF THREE DISCRETE SOLUBILITY FRACTIONS IN ASPHALTS WAS OBTAINED BY EXTRACTION METHODS AND BY PAPER-PARTITION CHROMATOGRAPHY. PARAFFIN BODIES WERE REVEALED BY MICROSCOPIC EXAMINATION OF THIN FILMS. ASPHALTENE FRACTIONS SHOWED THE PRESENCE OF PARTICULATE MATERIAL BY ELECTRON MICROSCOPY AND ALSO REVEALED INDICATIONS OF PEPTIZED ASPHALTENE BODIES. OILS DIALYZED FROM ASPHALT EXHIBITED FLUORESCENCE, WHEN EXPOSED TO ULTRA VIOLET RADIATION, SIMILAR TO COMPONENTS OF THE OIL FRACTIONS OBTAINED BY EXTRACTION. OVEN TESTS REVEALED INCREASES IN ASPHALTENES AND RESIN FRACTIONS AND ATTENDANT HARDENING OF THE ASPHALT. IT IS SUGGESTED THAT PROPER INTERPRETATION OF ASPHALT COMPOSITION IS CONTINGENT UPON ADEQUATE MEANS FOR MEASURING THE FUNDAMENTAL SHEARING CHARACTERISTICS AND OTHER RHEOLOGICAL PROPERTIES OF THE COMPOSITE ASPHALT. /AUTHOR/
Supplemental Notes: 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 Accession #: 01410519
Authors: Havens, James HDaniels, W FPagination: pp 13-26
Publication Date: 1956
Serial: Media Type: Print
Features: Figures; Photos; Tables
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Highways; Materials
Files: TRIS, TRB
Created Date: Dec 9 1994 12:00AM
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