Normas Europeas - Chotcrete

EUROPEAN SPECIFICATION for

SPRAYED CONCRETE

Association House, 99 West Street, Farnham, Surrey, GU9 7EN, UK tel: +44(0)1252 739147 fax: +44(0)1252 739140 www.efnarc.org

EFNARC was founded in March 1989 by five national trade associations representing producers and applicators of specialist building products. Membership has since been widened to include major European companieswho have no national body or institution to represent their interests. EFNARC provides a common voice for the industry to make known its comments and views to the European Commission, CEN Technical Committees and other groups dealing with European Harmonisation of Specifications and Standards in sprayed concrete, flooring and protection and repair of concrete structures. EFNARC has specialistTechnical Committees dealing with sprayed concrete and flooring. The Sprayed Concrete Technical Committee was formed in early 1991 and subsequently produced a Final Draft of this document in 1993. Over 1,000 copies have been circulated and it has been widely used as a reference document by specifiers, contractors and material suppliers in many European countries and beyond such as USA,Australia, the Far East, the Middle East and South Africa. It was also adopted by the European Working Group CEN/TC104/WG10 as one of its main documents to produce European Standard on Sprayed Concrete in 1994; and CEN/TC104/SC3 used Appendix 1 on Admixtures as the basis for the production of the European Standard for Sprayed Concrete Admixtures. This new edition takes account of comments madeby users of the document during this time. Bayhass El-Jazairi President

Acknowledgements EFNARC wishes to gratefully acknowledge all the contributions and comments made by the users to the 1993 Final draft and to the extensive work undertaken by the members of its Technical Committee. EFNARC wishes to acknowledge with thanks the work undertaken by Simon Austin, Loughborough Universityin the preparation of this Edition of the Specification.

Although care has been taken to ensure, to the best of our knowledge that all data and information contained herein is accurate to the extent that it relates to either matters of fact or accepted practice or matters of opinion at the time of publication, EFNARC assumes no responsibility for any errors in or misrepresentation of suchdata and/or information or any loss or damage arising from or related to its use. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, recording or otherwise, without prior permission of EFNARC.

ISBN 0 9522483 1 X

© 1996 EFNARC

CONTENTS
1. 2. 3. 4. SCOPE.............................................................................................................. REFERENCED STANDARDS............................................................................... DEFINITIONS ...................................................................................................... CONSTITUENT MATERIALS................................................................................ 4.1 Cements............................................................................................... 4.2 Aggregates ........................................................................................... 4.3 Mixing water ......................................................................................... 4.4 Steelreinforcement................................................................................ 4.5 Fibres................................................................................................... 4.6 Admixtures ........................................................................................... 4.7 Additions .............................................................................................. 4.8 Curing...