ISO INTERNATIONAL STANDARD 1920-12 First edition 2015-05-15 Testing of concrete Part 12: Determination of the carbonation resistance of concrete Accelerated carbonation method Essais du béton - Partie 12: Détermination de la résistance du béton a la carbonation Méthodede carbonation accélérée Reference number ISO 1920-12:2015(E) ISO International Organization for Standardization eZhejang Insttute of Standardization 5956617 @IS02015 mitted without license from IHS IS0 1920-12:2015(E) COPYRIGHT PROTECTED DOCUMENT IS0 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Not for Resale, 2015/8/7 03:26:56 No reproduction ,or networking permited without license from IHS IS0 1920-12:2015(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Principle ..2 5 Reagents and apparatus .2 6 Preparation of specimens ..3 6.1 General .3 6.2 Making, curing, and testing of prisms and cubes. .3 7 Carbonation depth measurements. .5 7.1 Exposure period and generation of colour change ..5 Determination of the carbonation depth .5 8 8.1 General. .5 8.2 Measuring the depth of carbonation .5 8.3 Appreciation of dense aggregates 5 8.4 Appreciation of pores and porous aggregates and extreme values. .6 8.5 Expression of the results. 9 Test report. 10 Precision .1 Annex A (informative) Guidance on suitable storage chambers 8 iii icensee=Zhejiang Institute of Standardization 5956617 thout license from IHS