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Title:

PREDICTABILITY TECHNIQUES FOR ASPHALT DURABILITY

Accession Number:

00148651

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309025648

Abstract:

A procedure is needed for predicting the durability requirements of asphalts. Development of this procedure should result in specifications for improvement of asphalt quality. First, testing techniques must be identified that will be sensitive to changes in asphalt quality. Second, these changes must be related to in-service changes in pavements. Third, the quality specifications must be imposed to curb the inevitable time-dependent changes to the degree desired. This study identified testing techniques that are sensitive to changes in asphalt quality by comparing the results of tests of (a) chemical composition, (b) vanadium content, (c) weatherometer exposure, and (d) rolling thin film oven aging to the durability of environmentally aged specimens. Durability is considered to be measured by the combination of viscosity and asphaltene increases with time. Rankings of each of these testing techniques are compared to actual environmental rankings to illustrate the techniques that best identify the durability changes. The major finding of the study is the high degree of correlation between the vanadium content and environmental rankings. If compositional considerations are such that any asphalt imbalance or high volatility is a minimal factor, then the vanadium content is the best single parameter for predicting asphalt durability.

Supplemental Notes:

Publication of this paper sponsored by Committee on Characteristics 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.

Monograph Accession #:

01411128

Authors:

Green, E L
Tolonen, W J
Peters, R J

Pagination:

pp 1-8

Publication Date:

1976

Serial:

Transportation Research Record

Issue Number: 595
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309025648

Media Type:

Print

Features:

Figures (5) ; Photos; References (12) ; Tables (5)

Old TRIS Terms:

Subject Areas:

Highways; Materials

Files:

TRIS, TRB

Created Date:

Mar 30 1977 12:00AM

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