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Title:

EVALUATION OF PHYSICAL PROPERTIES OF FINE CRUMB RUBBER-MODIFIED ASPHALT BINDERS

Accession Number:

00714794

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/issn/03611981

Abstract:

The results of a laboratory experiment aimed at evaluating the physical properties of apshalt binder containing fine crumb rubber modifier are outlined. Binder characterization procedures developed as part of the Strategic Highway Research Program (SHRP) were used in the analysis. The collective products of SHRP asphalt research are now called Superpave. The crumb rubber modifier used was produced from a wet ambient grind process. The maximum rubber particle size was 180 micrometers, with an average particle size of 74 micrometers. Testing showed that when compared with the base asphalts, the fine crumb rubber-modified binders were stiffer at high pavement temperatures, were less stiff at low pavement temperatures, and had approximately the same or slightly less stiffness at intermediate temperatures. The behavior of the asphalt rubber binders during rolling thin film oven (RTFO) aging was unlike that of the base asphalts. The fine rubber-modified binders tended to veil across the RTFO bottle during aging, or in other cases it congregated in a thick film around the perimeter of the RTFO bottle during the aging process. Viscosity tests showed that the asphalt rubber binders are subject to viscosity building when they are stored at high temperatures. No other difficulties were encountered in using the Superpave binder analysis procedures to characterize fine crumb rubber-modified binders.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1488, Unmodified and Modified Asphalt Binders. 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 #:

01399832

Language:

English

Authors:

McGennis, Robert B

Pagination:

p. 62-71

Publication Date:

1995

Serial:

Transportation Research Record

Issue Number: 1488
Publisher: Transportation Research Board
ISSN: 0361-1981

Features:

Figures (8) ; References (10) ; Tables (9)

Subject Areas:

Highways; Materials; I31: Bituminous Binders and Materials

Files:

TRIS, TRB, ATRI

Created Date:

Nov 29 1995 12:00AM

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