ISO INTERNATIONAL STANDARD 2509 Second edition 1989-05-15 Sound-absorbing expanded pure agglomerated cork in tiles Agglomeres expansés purs de liege absorbants acoustiques en dalles Reference number ISO 2509 : 1989 (E) Not for Resale itted without license from IHS ISO 2509 : 1989 (E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards bodies (Iso member bodies), The work of preparing International Standards is normaly carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liaison with ISO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (lEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the ISO Council. They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 2509 was prepared by Technical Committee ISO/TC 87, Cork. This second edition cancels and replaces the first edition (IS0 2509 : 1973), of which it constitutes a technical revision. ? ISO 1989 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland d without license from IHS Not for Resale ISO 2509 : 1989 (E) INTERNATIONAL STANDARD Sound-absorbing expanded pure agglomerated cork in tiles Scope Unless otherwise agreed, tiles shall have the following dimen- sions: This International Standard specifies certain characteristics of 300 mm × 300 mm sound-absorbing expanded pure agglomerated cork in tiles. 500 mm × 500 mm Normative references 300 mm × 600 mm 2 1 000 mm × 500 mm The following standards contain provisions which, through reference in this text, constitute provisions of this International minimum thickness : 20 mm Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to The tolerances allowed for the dimensions are agreements based on this International Standard are encour- aged to investigate the possibility of applying the most recent length and width : ± 0,4 %, with a maximum of 3 mm editions of the standards listed below, Members of IEC and ISO thickness: ± 0,4 mm maintain registers of currently valid International Standards. Iso 354 : 1985, Acoustics - Measurement of sound absorp- 5.2 Squareness tion in a reverberation room. The visible edges of sound-absorbing expanded pure Iso 633 : 1986, Cork - Vocabulary. agglomerated cork in tiles shall be at right angles. The deviation from squareness shall not exceed 0,3° (1,5 mm). ISo 2066 : 1986, Expanded pure agglomerated cork -- Deter- mination of moisture content. 5.3 Moisture content ISo 2077 : 1979, Pure expanded corkboard -- Determination of the modulus of rupture by bending. The moisture content of tiles, determined in accordance with the method described in iS0 2066, shall not exceed 4 % . Definitions 3 5.4 Modulus of rupture by bending For the purpose of this International Standard the definitions in Iso 633 and the following definition apply. The modulus of rupture of each specimen tested by bending, in accordance with the method described in IsO 2077, shall not sound-absorbing expanded pure agglomerated cork : Ex- be less than 140 kPa for thicknesses greater than or equal panded agglomerated cork in tiles for use in the correction of to 20 mm. room acoustics by the absorption of incident