CSA S448 1-2010 Repair of reinforced concrete in buildings and parking structures (Second Edition).pdf

1、S448.1-10Repair of reinforced concrete in buildings and parking structuresLegal Notice for StandardsCanadian Standards Association (CSA) standards are developed through a consensus standards development process approved by the Standards Council of Canada. This process brings together volunteers repr

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17、of the contents hereof, and if you do make such copies, you are required to destroy them immediately. Use of this document constitutes your acceptance of the terms and conditions of this Legal Notice.CSA Standards Update ServiceS448.1-10July 2010Title: Repair of reinforced concrete in buildings and

18、parking structuresPagination: 52 pages (viii preliminary and 44 text), each dated July 2010To register for e-mail notification about any updates to this publicationgo to www.ShopCSA.caclick on E-mail Services under MY ACCOUNTclick on CSA Standards Update ServiceThe List ID that you will need to regi

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20、r-profit private sector organization5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canada L4W 5N61-800-463-6727 416-747-4044Visit our Online Store at www.ShopCSA.caS448.1-10Repair of reinforced concrete in buildings and parking structuresCSA Standard100%ISBN 978-1-55491-417-3Technical Editor:Mu

21、ktha Tumkur Canadian Standards Association 2010All rights reserved. No part of this publication may be reproduced in any form whatsoever without the prior permission of the publisher.To purchase CSA Standards and related publications, visit CSAs Online Store at www.ShopCSA.ca or call toll-free 1-800

22、-463-6727 or 416-747-4044.The Canadian Standards Association (CSA) prints its publications on Rolland Enviro100, which contains 100%recycled post-consumer fibre, is EcoLogo and Processed Chlorine Free certified, and was manufactured using biogas energy.July 2010 iiiContents Canadian Standards Associ

23、ation Repair of reinforced concrete in buildings and parking structuresTechnical Committee on Repair of Reinforced Concrete in Buildings viPreface viii1Scope 12 Reference publications 23 Definitions 54 General requirements 64.1 Qualifications of personnel 64.2 Intent of repair programs 64.3 Structur

24、al considerations 64.4 Materials and equivalents 64.5 Environmental control 64.6 Waste management 74.7 Environmental management 75Materials 75.1 General 75.2 Concrete materials 75.3 Reinforcement 75.4 Embedded and attached hardware 75.5 Site-applied epoxy coating 75.6 Bonding agents 85.7 Grout 85.8

25、Mortars 85.9 Shotcrete 85.10 Polymer modified concrete 85.11 Injection materials 85.12 Patching compounds 85.13 Equivalent materials 85.14 Protection 86 Evaluation of existing structure 96.1 General requirements 96.1.1 General 96.1.2 Scope 96.1.3 Causal factors 96.2 Evaluation procedures 106.2.1 Gen

26、eral 106.2.2 Visual survey and monitoring 106.2.3 Delamination survey 106.2.4 Coring program 106.2.5 Test pits 116.2.6 Corrosion activity measurements 116.2.7 Covermeter survey 116.2.8 Reinforcement survey 116.2.9 In-place tensile tests; impact hammer, ultrasonic, radiographic, and radar penetration

27、 surveys; and chemical and petrographic analyses 11S448.1-10 Canadian Standards Associationiv July 20106.2.10 Load testing 116.3 Evaluation report 127 Repair design specifications 127.1 Objective 127.2 General requirements 127.2.1 Design 127.2.2 Details 127.3 Technical requirements 137.3.1 Crack and

28、 joint repair 137.3.2 Localized repair of concrete delamination and spall 137.3.3 Concrete surface repair 137.3.4 Partial- and full-depth structural repair and strengthening 147.3.5 Compatibility 147.3.6 Certification 147.3.7 Temporary support 147.3.8 Protection 157.3.9 Hazardous materials and areas

29、 157.3.10 Material substitutions 157.3.11 Appearance 158Repair 158.1 General 158.2 Removal 158.3 Identification 158.4 Shoring and falsework 158.5 Concrete 168.6 Reinforcement 168.7 Removal methods 168.7.1 General 168.7.2 Impact hammers 168.7.3 Hydro-demolition 168.7.4 Sawcutting 169 Preparation 169.

30、1 Concrete surfaces 169.2 Reinforcement 179.2.1 Cleaning 179.2.2 Loss of section 179.3 Embedded hardware 179.4 Crack treatment 1710 Placement, finishing, and curing 1710.1 General 1710.2 Materials 1710.3 Reinforcement 1710.3.1 Materials 1710.3.2 Positioning of reinforcement 1810.3.3 Splices 1810.3.4

31、 Welded splices 1810.3.5 Mechanical splices 1810.4 Bonding agents 1810.4.1 Compatibility 1810.4.2 Timing 18 Canadian Standards Association Repair of reinforced concrete in buildings and parking structuresJuly 2010 v10.5 Concrete 1810.5.1 General 1810.5.2 Mix design 1810.5.3 Appearance 1811 Quality c

32、ontrol 1911.1 General 1911.2 Program and report 1911.3 Shoring and falsework 1911.4 Removal of concrete and reinforcement 1911.5 Preparation 1911.6 Placement of concrete 1911.7 Testing 1911.7.1 Frequency and type 1911.7.2 Personnel and laboratory 2011.7.3 Reporting 2012 Maintenance procedures 2012.1

33、 Objective 2012.2 Maintenance program 2013 Related considerations 20AnnexesA (informative) Commentary on repair of reinforced concrete in buildings 21B (informative) Commentary on evaluation of existing structure 26C (informative) Protection materials and systems 30D (informative) Maintenance guidel

34、ines 35S448.1-10 Canadian Standards Associationvi July 2010Technical Committee on Repair of Reinforced Concrete in BuildingsG. Cody Construction Control Inc.,Woodbridge, OntarioChairR. McGrath Cement Association of Canada (CAC),Ottawa, OntarioVice-ChairT. Alexander Construction Control Inc.,Woodbrid

35、ge, OntarioAssociateL. Cecire Canadian Construction Materials Centre,Ottawa, OntarioS. Chidiac McMaster University,Hamilton, OntarioJ. Deans Ontario Power Generation,Niagara-on-the-Lake, OntarioR. Dozzi Harris Rebar engineers are responsible for selecting appropriate procedures and materials to obta

36、in the desired performance. This Standard covers the repair of regular (i.e., not pre-stressed or post-tensioned) reinforced concrete structural elements in buildings and parking structures. This Standard addresses the need to ensure the structural integrity and safety of a building during the repai

37、r period and the need for the engineer to establish follow-up maintenance and monitoring programs for implementation by the building owner.This Standard reflects the current state of knowledge regarding concrete repair technology. It recognizes that, in the design of a repair project, the engineer w

38、orks closely with the owner to determine the owners requirements for service life following repair and his or her commitment to regular maintenance of the structure.This Standard was prepared by the Technical Committee on Repair of Reinforced Concrete in Buildings, under the jurisdiction of the Stra

39、tegic Steering Committee on Structures (Design), and has been formally approved by the Technical Committee.July 2010Notes: (1) Use of the singular does not exclude the plural (and vice versa) when the sense allows.(2) Although the intended primary application of this Standard is stated in its Scope,

40、 it is important to note that it remains the responsibility of the users of the Standard to judge its suitability for their particular purpose.(3) This publication was developed by consensus, which is defined by CSA Policy governing standardization Code of good practice for standardization as “subst

41、antial agreement. Consensus implies much more than a simple majority, but not necessarily unanimity”. It is consistent with this definition that a member may be included in the Technical Committee list and yet not be in full agreement with all clauses of this publication.(4) CSA Standards are subjec

42、t to periodic review, and suggestions for their improvement will be referred to the appropriate committee.(5) All enquiries regarding this Standard, including requests for interpretation, should be addressed to Canadian Standards Association, 5060 Spectrum Way, Suite 100, Mississauga, Ontario, Canad

43、a L4W 5N6.Requests for interpretation should(a) define the problem, making reference to the specific clause, and, where appropriate, include an illustrative sketch;(b) provide an explanation of circumstances surrounding the actual field condition; and(c) be phrased where possible to permit a specifi

44、c “yes” or “no” answer.Committee interpretations are processed in accordance with the CSA Directives and guidelines governing standardization and are published in CSAs periodical Info Update, which is available on the CSA Web site at www.csa.ca. Canadian Standards Association Repair of reinforced co

45、ncrete in buildings and parking structuresJuly 2010 1S448.1-10Repair of reinforced concrete in buildings and parking structures1Scope1.1This Standard specifies requirements for the repair of reinforced structural concrete components of buildings and parking structures.1.2This Standard does not cover

46、 repairs to (a)pre-stressed, including post-tensioned, components and structures; or(b) non-structural slabs-on-grade.1.3This Standard does not cover repairs to(a)docks and wharves;(b) highway bridges;(c) bins, tanks, and silos; or(d) treatment plants.1.4This Standard is generally limited to materia

47、ls and procedures pertaining to repairs that are accepted asindustry standard and based on sound engineering practice. This Standard does not prohibit the use of innovative procedures and materials provided that(a)such procedures are carried out by persons qualified in the specific methods applied;

48、(b) an acceptable level of safety and performance is provided when one of the following methods is used:(i) analysis based on generally established theory;(ii) evaluation of a full-scale structure or a prototype; or(iii) studies of model analogues; and(c) such methods are acceptable to the owner.1.5

49、This Standard specifies requirements for the preparation of recommendations for installation of appropriate protection materials or systems and for post-repair maintenance schedules in order to provide protection to repaired structures and components.1.6In CSA standards, “shall” is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should” is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible wit