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Title:

COMPARISON OF FOUR AGGREGATES USING THE WASHINGTON HYDRAULIC FRACTURE TEST

Accession Number:

00616322

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/isbn/0309051053

Abstract:

The importance of identifying D-cracking susceptible aggregates has led to a considerable number of aggregate identification test procedures. Unfortunately, the more reliable of the procedures may require 8 weeks or longer, expensive equipment, and highly skilled operators. In response to this problem, the Strategic Highway Research Program (SHRP) has issued a research contract to develop a rapid, reliable test method for identifying aggregates susceptible to D-cracking. The new test method being developed is used to examine four aggregates: two that have produced D-cracking in the field, and two with a performance history of no D-cracking. The test method involves covering an oven-dried aggregate sample with water, and then pressurizing the water to 1,150 psi (7,930 kPa). The pressure is quickly released, and then the pressurization and release cycle is repeated. Ten cycles per day are run for a total of 50 cycles. The amount of aggregate fracturing is determined and indicates D-cracking potential. The D-cracking susceptibility of the four aggregates tested was clearly identified even though the samples were different materials from diverse origins and locations.

Supplemental Notes:

This paper appears in Transportation Research Record No. 1301, Factors Affecting Properties and Performance of Pavements and Bridges 1991. 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 #:

01407099

Authors:

Janssen, Donald J
Almond, David K

Pagination:

p. 57-67

Publication Date:

1991

Serial:

Transportation Research Record

Issue Number: 1301
Publisher: Transportation Research Board
ISSN: 0361-1981

ISBN:

0309051053

Features:

Figures (7) ; Photos (1) ; References (30) ; Tables (3)

Uncontrolled Terms:

Susceptibility; Time savings

Subject Areas:

Geotechnology; Highways; I36: Aggregates

Files:

TRIS, TRB, ATRI

Created Date:

Oct 31 1991 12:00AM

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