International ISO 4 Standard ISO 16311-1 Second edition Maintenance and repair of concrete 2024-05 structures Part 1: General principles Entretien et reparation des structures en beton- Partie l:Principes généraux Reference number @ ISO 2024 ISO 16311-1:2024(en) IS0 16311-1:2024(en) COPYRIGHT PROTECTED DOCUMENT @ ISO 2024 Al 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 CP401.Ch.de . Blandonnet 8 CH-1214Vernier,Geneva Phone:+41227490111 Email:copyright@iso.org Website:www.iso.org Published in Switzerland ISO 2024-All rights reserved ii ISO 16311-1:2024(en) Contents Page @ Foreword Introduction 1 Scope 2 Normative references Terms 3 and definitions Basis 4 of maintenance and repair General 4.1 4.2 Procedure ofmaintenance and repair 4.3 Competence of personnel 5 Maintenance plan 5.1 General 5.2 Timing of maintenance planning for structure 5.3 Maintenance category 5.4 Formulation ofmaintenance plans 6 Assessment 6.1 General 6.2 Assessment plan 6.2.1 of assessmentplan Preparation 6.2.2 Category of assessment 6.2.3 Level of assessment 6.3 Investigation ... 6.4 Registrationofcondition Evaluation and decision making 6.5 8 Repair 7 7.1 General 9 7.2 Planningand design 9 7.2.1 General 7.2.2 Option of remedial actions 7.2.3 Factors to consider 7.2.4 Choice of appropriate strategies 7.2.5 Choice of appropriate methods 11 Properties 7.2.6 of materials , products and systems 7.2.7 Other remedial actions Execution 7.3 12 7.3.1 General 12 General requirements 7.3.2 12 7.3.3 Structural stability before , under and after execution 7.3.4 of concrete substrate and reinforcement 12 Preparation 7.3.5 Application of materials , products and systems 13 7.3.6 Quality control .13 Maintenance following completion of repair 7.3.7 13 Recording 8 8.1 General .13 8.2 Period of preservation 13 Method of recording 8.3 ..13 8.3.1 Format of recordsandits accessibility 13 8.3.2 Items included inrecords 8.3.3 Records concerning repair................ Annex A (informative ) Extended hierarchy of "standards for maintenance and repair of concrete structures "with national legislationand otherrelated International Standards ...15 Annex B (informative ) Hierarchy of terms .16 @ IS0 2024 All rights reserved ili