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Title:

RELATING ASPHALT ABSORPTION TO PROPERTIES OF ASPHALT CEMENT AND AGGREGATE

Accession Number:

00625144

Record Type:

Component

Availability:

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

Abstract:

Mineral aggregates used in hot mix asphalt (HMA) mixtures have some porosity and tend to absorb some amount of asphalt cement. Several indirect and direct methods for estimating or determining asphalt absorption have been researched. However, there is a need to study the asphalt absorption phenomenon as related to the physical properties of the mineral aggregate and asphalt cement binder. Eight mineral aggregates of different absorptive characteristics, geologic origin, and mineral compositions were selected from the Strategic Highway Research Program Materials Reference Library (SHRP MRL). Four asphalt cements ranging from AC-5 to AC-30 grades were also obtained from SHRP MRL. A total of 96 HMA mixtures were prepared and tested for asphalt absorption. Physical properties of aggregates (including pore characteristics) and asphalt cements were determined. Generally, the asphalt absorption decreased with increase in viscosity (at the mixing temperature) of the asphalt cement. A high percentage of maltene (oil) fraction in asphalt cement is likely to increase the total asphalt absorption, possibly because of selective absorption. There appears to be a threshold pore diameter of 0.05 microm in the aggregate below which no appreciable asphalt absorption takes place. The most important pore size range affecting the asphalt absorption appears to be 0.05 to 0.1 microm.

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:

Kandhal, Prithvi S
Khatri, Maqbool A

Pagination:

p. 76-84

Publication Date:

1992

Serial:

Transportation Research Record

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

ISBN:

030905205X

Features:

Figures (5) ; References (23) ; Tables (8)

Subject Areas:

Highways; Materials; I31: Bituminous Binders and Materials

Files:

TRIS, TRB, ATRI

Created Date:

Oct 20 1993 12:00AM

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