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Title:

LABORATORY TESTS FOR PREDICTING COARSE AGGREGATE PERFORMANCE IN ONTARIO

Accession Number:

00616326

Record Type:

Component

Availability:

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

Abstract:

Coarse aggregates used in granular base and asphaltic and portland cement concrete must be sound and capable of withstanding the prevailing environment. In Canada, aggregates must be frost resistant. Durability of coarse aggregate is normally evaluated in the sulfate soundness test and water absorption tests, and by measuring resistance to impact in the Los Angeles abrasion and impact test. These tests suffer from some disadvantages: poor precision and inadequate correlation with field performance. The Ministry of Transportation has been developing and evaluating new test procedures for a number of years. Some of the major findings are summarized. The likely performance of aggregates in granular base is best measured by the micro-Deval test and water absorption. The physical quality of portland cement concrete aggregates is best measured by the micro-Deval test, water absorption, and unconfined freezing and thawing. The quality of asphaltic concrete aggregates is best measured by the micro-Deval test, polished-stone value test, and unconfined freezing and thawing test. Petrographic examination is also an essential tool in the evaluation of aggregate quality.

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:

Senior, S A
Rogers, C A

Pagination:

p. 97-106

Publication Date:

1991

Serial:

Transportation Research Record

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

ISBN:

0309051053

Features:

Figures (18) ; References (12) ; Tables (2)

Uncontrolled Terms:

Micro-Deval test; Quality; Water absorption

Geographic Terms:

Canada

Subject Areas:

Geotechnology; Highways; I36: Aggregates

Files:

TRIS, TRB, ATRI

Created Date:

Oct 31 1991 12:00AM

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