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Title:

STRUCTURE-FRACTURE TOUGHNESS RELATIONSHIPS OF ASPHALT CONCRETE MIXTURES

Accession Number:

00625404

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309052173

Abstract:

A methodology to characterize the resistance of asphalt concrete mixtures to fatigue crack propagation has been developed to construct fundamental structure-fracture toughness relationships. Experimental techniques to evaluate parameters controlling the crack propagation process are presented. These parameters include crack driving force and the change in work done on the crack tip damage (active zone). A linear relationship between the width of the active zone and the crack length is assumed in order to quantify the amount of damage at each crack length. A constitutive equation is used to extract the specific energy of damage, a material parameter characteristic of the asphalt concrete mixture's resistance to crack propagation, and a dissipative coefficient. The capability of this approach to discriminate the subtle effect introduced by different chemical structures of asphalt on the specific energy of damage is demonstrated on Elvax-modified AC-5 and AC-20 concrete mixtures. The validity of the current approach to describe the fatigue behavior of asphalt concrete mixtures over the entire range of energy release rate is verified. The practical utilization of this methodology is evident. It forms a basis on which structure- or processing condition-fracture toughness relationships of asphalt concrete mixtures can be constructed. Such relationships can guide the development of asphalt concrete mixtures with superior crack resistance and aid in the design of primary and secondary pavements.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1353, Asphalt Mixture Design. 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 Title:

Asphalt mixture design

Monograph Accession #:

01405031

Language:

English

Authors:

Aglan, H
Shehata, I
Figueroa, L
Othman, A

Pagination:

p. 24-30

Publication Date:

1992

Serial:

Transportation Research Record

Issue Number: 1353
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309052173

Features:

Figures (10) ; References (29)

Uncontrolled Terms:

Fracture resistance; Relationships

Subject Areas:

Highways; Materials; I31: Bituminous Binders and Materials

Files:

TRIS, TRB, ATRI

Created Date:

Nov 25 1993 12:00AM

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