Committees responsible for this British Standard

The preparation of this British standard was entrusted by Technical eommittee, B/517, eoncrete, to subcommittee B/517/3, Admixtures, upon which the following bodies were represented:

Brick Development Association British eement Association

British Cement Association

British Precast eoncrete Federation Ltd. eement Admixtures Association CERAM Research Ltd.

Cement Admixtures Association

CERAM Research Ltd.

Concrete Society

Quarry Products Association

Institute of Concrete Technology

Institution of Civil Engineers

Society of Chemical Industry

ODPM — Represented by BRE

Co-opted members

This British standard was published under the authority of the standards Policy and strategy Committee on 20 January 2006

The following Bsr references relate to the work on this British standard:

Committee reference B/517/3

Draft for comment 05/30099595 Dc

Foreword

This British standard has been prepared by subcommittee B/517/3.

It is intended to establish the suitability of seven categories of special purpose concrete admixtures that are in widespread use in the United Kingdom and that are not covered by Bs EN 934‑2, Admixtures for concrete, mortar and grout – Part 2: Concrete admixtures – Definitions, requirements, conformity, marking and labelling.

The requirements follow the format established by Bs EN 934‑2. However, for some of the admixtures, there is no internationally agreed laboratory test available to measure their effectiveness in relation to the primary function. rn these cases, the effectiveness is required to be agreed between the manufacturer and purchaser.

This British standard calls for the use of substances and/or procedures that may be injurious to health if adequate precautions are not taken. rt refers only to technical suitability and does not absolve the user from legal obligations relating to health and safety at any stage.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard does not of itself confer immunity from legal obligations.

Summary of pages

This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 13 and a back cover.

The BSI copyright notice displayed in this document indicates when the document was last issued.

1 Scope

This British standard specifies terms, definitions and requirements for special purpose admixtures in order to establish suitability for use in concrete conforming to Bs EN 206‑1.

The admixtures covered are listed as follows; they are intended for use in plain, reinforced, foamed, prestressed and semi-dry concrete as appropriate. The concrete can be site mixed, ready mixed or pre-cast:

underwater concrete admixtures;
shrinkage reducing admixtures;
corrosion inhibiting admixtures;
pumping aids;
segregation reducing admixtures;
foaming admixtures;
semi-dry concrete admixtures.

Provisions governing the practical application of admixtures in the production of concrete, i.e. requirements concerning composition, mixing, placing, curing, etc. of concrete containing admixtures are not within the scope of this standard.

2 Normative references

3 Terms, definitions, symbols and abbreviations

3.1 Terms and definitions

3.2 Symbols and abbreviations

4 Requirements

4.1 General requirements

4.2 Information to be provided by the manufacturer

4.3 Requirements for specific types of admixture

5 Sampling

6 Conformity control

6.1 Initial type testing

6.2 Factory production control

7 Evaluation of conformity

8 Marking and labelling

8.1 General

8.2 Designation and traceability

8.3 Additional information

BS 8443:2005

Specification for establishing the suitability of special purpose concrete admixtures

Current, Under Review

Published:

20 Jan 2006