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Title:

CHARACTERIZATION OF AGE-HARDENING POTENTIAL OF ASPHALTS BY USING CORBETT-SWARBRICK ASPHALT FRACTIONATION TEST

Accession Number:

00622188

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309051630

Abstract:

The use of the Corbett-Swarbrick fractionation procedure for characterization of age-hardening potentials of asphalts was studied. The fractionation procedure was used to separate asphalts into four different fractions (asphaltenes, saturates, naphthene-aromatics, and polar-aromatics), to identify trends in the changes of proportions of these asphalt fractions during aging. The technique of infrared spectroscopy was used to examine the changes in the characteristics of these fractions during aging. Analyses were performed to determine the relationship between the properties of these asphalt fractions and the hardening potential of the asphalts. The proportions of fractions in asphalts were found to change during aging: the proportions of the asphaltenes and polar-aromatics increase and the proportions of saturates and naphthene-aromatics decrease. For the asphalts tested, the higher the asphaltene content of an original asphalt, the higher the aging potential as determined by the absolute viscosity ratios after the thin film oven test (TFOT) or the rolling thin film oven test (RTFOT). The proportions of asphalt fractions in the original asphalts were found to correlate fairly well with the absolute viscosity ratios after the TFOT and moderately well after the RTFOT. The results of infrared spectral analyses on the asphalt fractions indicated that the characteristics of the fractions change as an asphalt ages. Anhydrides, carboxylic acids, and ketones develop in asphaltenes; carboxylic acids and ketones develop in polar-aromatics and naphthene-aromatics as a result of aging. No evidence exists that any functional group developed in saturates as a result of aging.

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:

Asphalt mix materials, 1991

Monograph Accession #:

01407199

Authors:

Shiau, Jih-Min
Tia, Mang
Ruth, Byron E
Page, Gale C

Pagination:

p. 53-60

Publication Date:

1991

Serial:

Transportation Research Record

Issue Number: 1323
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309051630

Features:

Figures (12) ; References (9) ; Tables (7)

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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