As 2758.1-1998 Aggregates and Rock for Engineering Purposes Concrete Aggregates

7/31/2019 As 2758.1-1998 Aggregates and Rock for Engineering Purposes Concrete Aggregates

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AS 2758.11998

Australian Standard

Aggregates and rock forengineering purposes

Part 1: Concrete aggregates


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This Australian Standard was prepared by Committee CE/12, Aggregates and Rockfor E ngineering Purposes. It was approved on behalf of the Council of S tandardsAustralia on 21 November 1997 and published on 5 February 1998.

The following interests are represented on Committee CE/12:

ARRB Transport Research

Australasian Railway Association

Australasian Slag Association

Australian Asphalt Pavement Association

Australian Geomechanics Society

Australian Premixed Concrete Association

Australian Stone Industry Association

AUSTROADS

Bureau of Steel Manufacturers of Australia

Cement and Concrete Association of Australia

CSIRO Division of Building, Construction and Engineering

Crushed Stone Association of Australia

Crushed Stone Association (Qld)

Institute of Municipal Engineering Australia, New South Wales Division

Monash University

National Association of Testing Authorities, Australia

National Public Works Council

National Ready Mixed Concrete Association of New South Wales

Quarry Masters Association of New South Wales

Review of Australi an Standards. To keep abreast of progress in industry, Australian Standards aresubject to periodic review and are kept up to date by the issue of amendments or new editions asnecessary. It is important therefore that Standards users ensure that they are in possession of the latestedition, and any amendments thereto.Full details of all Australian Standards and related publications w ill be found in the Standards AustraliaCatalogue of Publications; this information i s supplemented each month by the magazine The

Australian Standard, which subscribing members receive, and which gives detail s of new publication s,new editions and amendments, and of withdrawn Standards.Suggestions for improvements to Australian Standards, addressed to the head office of Standards

Australia, are wel comed. Notificatio n of any inaccuracy or ambiguity found in an Australian Standardshould be m ade wit hout delay i n order that the matter may be investigated and appropriate action taken.

This Standard was issued in draft form for comment as DR 96269.


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AS 2758.11998

Australian Standard

Aggregates and rock forengineering purposes


Originated as part of AS A24 1934.Previous edition AS 2758.11985.Second edition 1998.

PUBLISHED BY S TANDARDS AUSTRALIA(STANDARDS A SSOCIATION OF AUSTRALIA)1 THE CRESCENT, HOMEBUSH, NSW 2140

ISBN 0 7337 1730 6


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AS 2758.1 1998 2

PREFACE

This Standard was prepared by the Standards Australia Committee CE/12, Aggregates and

Rock for Engineering Purposes, to supersede AS 2758.11985.This Standard is part of a series which covers specification of aggregates and rock. The

other Parts are as follows:

Part 2: Aggregate for sprayed bituminous surfacing

Part 5: Asphalt aggregates

Part 7: Railway ballast

This Standard is called up by AS 3600, Concrete structures. I n this Standard, extensive

reference is made to AS 1141, Methods for sampling and testing aggregates , which isdesigned to include all aggregate tests, not only those for concrete.

The following clauses cover properties that are required to be known for a mix design and

the works specification should provide choices or limits for them:(a) Clause 7.1, for particle density.

(b) Clause 7.2, for bulk density.

(c) Clause 7.3, for water absorption.

(d) Clause 8.1, for particle size distribution.

(e) Clause 10, for alkali aggregate reactivity.

(f) Clause 14.3, for soluble salts if above the limits given.

The remaining aggregate properties in this Standard are given limits.

Durability of coarse aggregate is related to the use of concrete and its exposure and is nota mix design factor. The works specification should select an exposure classification and a

method of assessment (see Clause 9.3).

NOTE: Exposure classifications for various uses of concrete can be found in Appendix A.

Appendix B gives information on petrological terminology and classification of aggregate

sources i ncluding particle shape and texture.

When works specifications are being drafted by consultants or engineers based on this

Standard, it is intended that only one procedure be nominated for each property beingspecified. A specification is likely to lead to conflict if more than one procedure is

specified for a particular property (see coarse aggregate durability).

It is recognized that satisfactory concrete can sometimes be made with aggregates which

will not comply with this Standard in all respects, but the use of such aggregates shouldbe authorized only after s pecial testing or consideration of previous experience with theparticular aggregates concerned.

It is also recognized that concrete for specialized requirements may necessitate morestringent limits for aggregates than those given in this Standard.

It should be noted that compliance with the grading requirements given in Tables 1 and 3wi ll not nec es sar ily e nsur e the pr oduction of w ork able concr ete i n a ll mi x

proportions. The determination of mix proportions should be related to the actual nature

and grading of the aggregates to be used.

The terms normative and informative have been used in this Standard to define the

application of the appendix to w hich they apply. A normative appendix is an integral

part of a Standard, whereas an informative appendix is only for information andguidance.


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3 AS 2758.1 1998

CONTENTS

Page

1 SCO PE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42 AP PLI CAT IO N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

3 REFERENCED DOCUMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

4 DE FIN I TI ON S . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

5 SA MPL ING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

6 TE STI NG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

7 GE NERA L RE QUI REMEN TS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

8 DIMENSIONAL REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

9 DURABILITY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

10 ALKALI-REACTIVE MATERIALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

11 WEAK PARTICLES IN COARSE AGGREGATE . . . . . . . . . . . . . . . . . . . . . . 13

12 LIGHT PARTICLES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

13 DRYING SHRINKAGE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

14 IMPURITIES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

15 ADDITIONAL REQUIREMENTS FOR SLAG AGGREGATES . . . . . . . . . . . . 14

16 ADDITIONAL REQUIREMENTS FOR LIGHTWEIGHTAGGREGATES . . . . . 15

APPENDICES

A EXPOSURE CLASSIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

B TERMINOLOGY AND CLASSIFICATION (PETROLOGICAL) . . . . . . . . . . 19

Copyright STANDARDS AUSTRALIA

Users of Standards are r eminded that copyright subsists in all Standards Australia publications and software. Except where theCopyright Act allows and except where provided for below no publications or software produced by Standards Australia may bereproduced, stored in a retrieval system in any form or t ransmitted by any means without prior permission in writing fromStandards Australia. Permission may be conditional on an appropriate royalty payment. Requests for permission and i nformationon commercial software royalties should be directed to the head office of Standards Australia.

Standards Australia will permit up to 10 percent of the technical content pages of a Standard to be copied for useexclusively in-house by purchasers of the Standard without payment of a royalty or advice to Standards Australia.

Standards Australia will also permit the inclusion of its copyright material in computer software programs for no r oyaltypayment provided such programs are used exclusively in-house by the creators of the programs.

Care should be taken t o ensure that material used is from the current edition of t he Standard and that it is updated whenever theStandard is amended or revised. The number and date of the Standard should therefore be clearly identified.

The use of material in print form or in computer software programs t o be used commercially, with or without payment, or incommercial contracts is subject to the payment of a royalty. This policy may be varied by Standards Australia at any time.


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AS 2758.1 1998 4

STANDARDS AUSTRALIA

Australian Standard

Aggregates and rock for engineering purposes


1 SC OPE This Standard provides a basis for specifying requirements for aggregates

intended for use in the production of concrete, including precast products. The

requirements and alternatives relate to quality of rock and the properties of aggregatesincluding lightweight aggregates, and refer to the relevant test methods in AS 1141,

AS 1012 and AS 4489.

2 APPLICATION This Standard shall be used in combination with a works

specification for contract purposes. While a number of the requirements nominated arebasic, the specifier shall make a selection fr om the options available in this Standard, orfrom alternative test methods and limits (which may be from Australian Standards or

other appropriate Standards) f or incorporation into the works specification.

The basic requirements for all concrete aggregates are prescribed in Clauses 7 to 14 of

this Standard. Additional basic requirements for slag and lightweight aggregates are

prescribed in Clauses 15 and 16 respectively. Alternatives are presented for theassessment of durability in Clause 9. However, not more than one of these alternatives

shall be specified.

The selection of test procedures and test limits where alternatives are provided, and the

frequency at which individual tests are required, shall be determined by the individual

works specification.The works specification should specify all the tests appropriate to the source rock or the

tender samples, or both, but the whole range of tests is not necessarily applied to controlacceptance of the product during the performance of a contract.

For contractual purposes it is the works specification which is binding. However, the casemay arise where a contract document uses phrases such as material complying with

AS 2758.1 without providing a works specification. In this event the supplier shallattempt to obtain further details f rom the purchaser. In the continued absence of a works

specification, material will be deemed to comply with AS 2758.1 if the supplier operates a

quality system that conforms to AS/NZS ISO 9002 and can provide test data from alaboratory accredited to SAA HB 18.25 showing that the material to be supplied

(a) is of normal weight;

(b) fulfils the requirements for aggregate to be used in concrete in B1, B2 exposure

classifications; and

(c) complies with Clauses 7 to 15 inclusive of this Standard.

3 REFERENCED DOCUMENTS The following documents are referred to in this

Standard:

AS

1012 Methods of testing concrete

1012.13 Method 13: Determination of the drying shrinkage of concrete for samples

prepared in the field or in the laboratory

COPYRIGHT


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