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Title:

REJUVENATOR DIFFUSION IN BINDER FILM FOR HOT-MIX RECYCLED ASPHALT PAVEMENT

Accession Number:

00467871

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309044603

Abstract:

In hot-mix recycling of bituminous mixes a rejuvenator is commonly used to restore the aged asphalt cement to a condition that resembles that of virgin asphalt cement. The type and amount of rejuvenator to be used are generally determined from a characterization of the recovered weathered binder. However, the extent to which the salvaged bitumen will be softened by the recycling agent during the hot-mix operation, and hence the characteristics of the rejuvenated binder and the resulting performance of the recycled pavement, has not been widely reported. An investigation was undertaken to determine the extent to which certain types of rejuvenators diffuse into the hardened asphalt film coating the aggregate and affect its properties during a specified period of time. A partial extraction technique that had the effect of dividing the asphalt film into microlayers was used. The binder recovered from each microlayer was characterized by means of consistency tests. This technique was used to evaluate the consistency distribution of the binder film around the aggregate in (a) the extracted mix containing recycled asphalt pavement (RAP) only; (b) the extracted mix containing RAP and a rejuvenator; and (c) the extracted mix containing RAP, virgin aggregate, and a rejuvenator.

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 #:

01492601

Authors:

Noureldin, Ahmed S
Wood, Leonard E

Pagination:

pp 51-61

Publication Date:

1987

Serial:

Transportation Research Record

Issue Number: 1115
Publisher: Transportation Research Board
ISSN: 0361-1981

Conference:

66th Annual Meeting of the Transportation Board

Location: Washington District of Columbia, United States
Date: 1987-1-12 to 1987-1-15

ISBN:

0309044603

Media Type:

Print

Features:

Figures (9) ; References (11) ; Tables (7)

Old TRIS Terms:

Subject Areas:

Highways; Materials; I31: Bituminous Binders and Materials

Files:

TRIS, TRB, ATRI

Created Date:

Mar 31 1988 12:00AM

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