ISO INTERNATIONAL STANDARD 22480-1 First edition 2022-01 Railway applications Concrete sleepers and bearers for track - Part 1: General requirements Applications ferroviaires-Traverses etsupports en béton pour la voie Partie1:Exigencesgénérales Referencenumber ISO 22480-1:2022(E) Tso IS0 2022 IS0 22480-1:2022(E) COPYRIGHTPROTECTEDDOCUMENT IS02022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on or IsO's member body in the country of the requester IsO copyright office CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier,Geneva Phone: +41 22 749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii IS02022-Allrightsreserved IS0 22480-1:2022(E) Contents Page Foreword .V Introduction. vi 1 Scope. 2 Normative references .1 3 Terms and definitions. .1 4 Symbols and abbreviated terms. .3 5 Determination oftest loads. 4 5.1 General. 4 5.2 Loadsforsleepersandbearersintrack 4 5.2.1 Loads 4 5.2.2 Load distribution 5 5.2.3 Characteristicbendingmoments 5 5.3 Testloads 5 5.3.1 General 5 5.3.2 Method A:verification of bending capacities 5 5.3.3 MethodB:verification ofminimumperformancerequirements .6 6 Data to be supplied 6 6.1 General .6 6.2 Data to be supplied by the purchaser. 6 6.3 Datato beprovided bythe supplier 7 6.3.1 Before the design approval tests 7 6.3.2 Afterthedesign approval tests 7 6.3.3 Prior to start-up of production 7 7 Materials 8 7.1 General requirements 8 7.2 Cement. 8 7.3 Aggregates. 8 7.4 Mixing water. 9 7.5 Admixtures 9 7.6 Concrete. .9 7.6.1 Material requirements 9 .10 7.6.2 Information to beprovidedbythe supplier 7.6.3 Changes for the material and processes. 10 7.7 Steel 10 7.7.1 Prestressing tendons 10 7.7.2 Reinforcing steel 10 7.7.3 Steelconnectingbarfortwin-blocksleepers .10 7.8 Embedded components 11 8 General requirements .11 8.1 Design. 11 8.1.1 Geometrical design 11 8.1.2 Concretecover. 13 8.1.3 Prestressing system design 13 8.1.4 Reinforcing steel design 14 8.2 Manufacturing process 14 8.2.1 General requirements 14 8.2.2 Manufacturing rules. 14 8.2.3 Curing 15 8.2.4 Concreteandambienttemperature 15 .17 8.3 Surface finish 8.4 Marking. 17 iii @IS0 2022 -All rights reserved