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Title:

REACTION RATES AND HARDENING SUSCEPTIBILITIES AS DETERMINED FROM PRESSURE OXYGEN VESSEL AGING OF ASPHALTS

Accession Number:

00625141

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/030905205X

Abstract:

Many attempts have been made to simulate road aging with laboratory tests. These have generally not been successful. One reason is that other causes of road failure, such as heavy traffic or construction deficiency, can obscure the effect of the asphalt binder. But other reasons are that an adequate model relating laboratory-measured properties to changes in the road is not available and that the oven test temperatures that have been used may be too high to relate oven aging to road aging. Use of the lower-temperature pressure oxygen vessel offers promise of approximating road conditions. It is shown that no test run at a single elevated temperature can be used to simulate road aging and that at road temperature the rate is still too low for practical testing. It is also shown, however, that the oxidative aging mechanism is constant at temperatures up to 82.2 deg C and that it approximates aging of the asphalt binder in laboratory cores. If this is borne out with road cores, extrapolation of higher temperature data may provide more accurate predictions of road aging.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1342, Asphalt and Asphalt Additives. 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 #:

01404979

Language:

English

Authors:

LAU, C K
Lunsford, K M
Glover, C J
Davison, R R
Bullin, J A

Pagination:

p. 50-57

Publication Date:

1992

Serial:

Transportation Research Record

Issue Number: 1342
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

030905205X

Features:

Figures (13) ; References (30) ; Tables (2)

Old TRIS Terms:

Subject Areas:

Design; Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials

Files:

TRIS, TRB, ATRI

Created Date:

Oct 20 1993 12:00AM

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