ISO INTERNATIONAL STANDARD 15630-3 Third edition 2019-02 Steel for the reinforcement and prestressing of concrete Test methods Part 3: Prestressing steel Aciers pour I'armature et la précontrainte du béton - Methodes d'essai- Partie 3: Aciers de précontrainte Reference number IS0 15630-3:2019(E) ISO @ IS0 2019 IS0 15630-3:2019(E) COPYRIGHTPROTECTEDDOCUMENT @ ISO 2019 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 the internet or an intranet, without prior written permission. Permission can be requested from either IsO at the address below 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: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2019 - All rights reserved IS0 15630-3:2019(E) Contents Page Foreword ..V Introduction. ...vi 1 Scope 2 Normative references 3 Terms, definitions and symbols 4 General provisions concerning test pieces ..3 5 Tensiletest ..4 5.1 Test piece .4 5.2 Test equipment 5.3 Test procedure. .4 5.3.1 General 5.3.2 Determination of the modulus of elasticity ..5 6 Bend test .6 6.1 Testpiece 6.2 Test equipment .6 6.3 Test procedure. 6.4 Interpretation of test results. 1 7 Reverse bend test. .1 7.1 Test piece. 7.2 Test equipment 1 7.3 Test procedure. ..8 8 Wrapping test ..8 8.1 Test piece. ..8 8.2 Test equipment .8 8.3 Test procedure. ..8 9 Isothermal stress relaxation test .9 9.1 Principle of test. .9 9.2 Test piece. .9 9.3 Test equipment .10 9.3.1 Frame. .10 9.3.2 Force-measuring device ..10 9.3.3 Length-measuring device (extensometer) .10 9.3.4 Anchoring device. ..10 9.3.5 Loading device. .10 9.4 Test procedure. .10 9.4.1 Provisions concerning the test piece ..10 9.4.2 Application of force .10 9.4.3 Initial force. .11 9.4.4 Force during the test. ..11 9.4.5 Maintenance of strain ..11 9.4.6 Temperature ..12 9.4.7 Frequency of force recording .12 9.4.8 Frequency of strain recording. .12 9.4.9 Duration of the test. ..12 10 Axial force fatigue test .12 10.1 Principle of test. .12 10.2 Test piece. ..13 10.3 Test equipment .13 10.4 Test procedure. .13 10.4.1 Provisions concerning the test piece .13 IS0 2019 - All rights reserved iii