BS ISO 14824-2-2012 Grout for prestressing tendons Grouting procedures《预应力钢筋束用水泥浆 灌浆规程》.pdf

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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 14824-2:2012Grout for prestressing tendonsPart 2: Grouting proceduresBS ISO 14824-2:2012 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of

2、 ISO 14824-2:2012. The UK participation in its preparation was entrusted to T e c h n i c a l Committee B/525/2, Structural use of concrete.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary

3、 provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012.ISBN 978 0 580 72058 1 ICS 91.100.30 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard wa

4、s published under the authority of the Standards Policy and Strategy Committee on 30 November 2012.Amendments issued since publicationDate T e x t a f f e c t e dBS ISO 14824-2:2012 ISO 2012Grout for prestressing tendons Part 2: Grouting proceduresCoulis pour cbles de prcontrainte Partie 2: Modes op

5、ratoires de gobetageINTERNATIONAL STANDARDISO14824-2First edition2012-10-01Reference numberISO 14824-2:2012(E)BS ISO 14824-2:2012ISO 14824-2:2012(E)ii ISO 2012 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2012All rights reserved. Unless otherwise specified, no part of this publication may be

6、reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22

7、 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 14824-2:2012ISO 14824-2:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Documentation . 14.1 Execution spe

8、cification 14.2 Quality plan 24.3 Execution documentation 25 Materials . 26 Grout assessment . 36.1 Suitability testing 36.2 Project specific grouting tests 37 Equipment . 47.1 General . 47.2 Mixer 47.3 Pump 47.4 Hoses . 47.5 Inlet connections . 47.6 Stand-by and emergency equipment . 48 Grouting pr

9、ocedures 58.1 Inlets, outlets and tendon anchorages 58.2 Precautions before grouting 58.3 Temperature at grouting 58.4 Grouting operations 68.5 Precautions after grouting 69 Quality management 69.1 General . 69.2 Personnel . 79.3 Inspection 79.4 Conformity criteria . 109.5 Action in the event of a n

10、on-conformity 10Bibliography .12BS ISO 14824-2:2012ISO 14824-2:2012(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technic

11、al committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely wi

12、th the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft Intern

13、ational Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may b

14、e the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 14824-2 was prepared by Technical Committee ISO/TC 71, Concrete, reinforced concrete and pre-stressed concrete, Subcommittee SC 3, Concrete production and execution of concrete structu

15、res.ISO 14824 consists of the following parts, under the general title Grout for prestressing tendons: Part 1: Basic requirements Part 2: Grouting procedures Part 3: Test methodsiv ISO 2012 All rights reservedBS ISO 14824-2:2012ISO 14824-2:2012(E)IntroductionIn post-tensioned prestressed concrete co

16、nstruction, the grouting of tendons is an important operation. The intention of this part of ISO 14824 is to provide a specification for grouting, compliance with which will satisfy the requirements in ISO 22966.The main function of grouting is to: protect the prestressing steel against corrosion; p

17、rovide a bond between the prestressing steel and the ducts where required for the design of the structure; allow the transfer of compressive stresses in the structure in a direction transverse to the internal tendons; fill all voids where water may accumulate and cause frost damage.The testing regim

18、es anticipated by this part of ISO 14824 include three levels:(1) initial type and audit testing in accordance with ISO 14824-1;(2) suitability testing for confirmation of the selected grout for a specific project in accordance with this part of ISO 14824;(3) inspection during the production of grou

19、t on a specific project in accordance with this part of ISO 14824.The test methods for each of the regimes are given in ISO 14824-3.In some countries requirements exist for independent third-party certification of grout and grouting procedures which should be set out in national requirements to supp

20、lement ISO 22966.Where the suitability of high viscosity grouts has been proven by full scale trials, any amendments or alternatives to the procedures in this part of ISO 14824 need to be incorporated in the execution specification (see 4.1). This also applies to certain special structures or tendon

21、 configurations which require grouts with enhanced performance. ISO 2012 All rights reserved vBS ISO 14824-2:2012BS ISO 14824-2:2012Grout for prestressing tendons Part 2: Grouting procedures1 ScopeThis part of ISO 14824 gives the procedures to be used for grouting of tendons in post-tensioned prestr

22、essed concrete. It is applicable to all types of structures, including bridges and buildings.This part of ISO 14824 also covers suitability testing and inspection testing for grouts and their component materials used on a project.2 Normative referencesThe following referenced documents are indispens

23、able for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 14824-1, Grout for prestressing tendons Part 1: Basic requirementsISO 14824-3, Grout for prest

24、ressing tendons Part 3: Test methodsISO 22966, Execution of concrete structures3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1grouthomogeneous mixture of cement and water, which may contain admixtures and additions3.2groutinginjection of grout

25、into ducts in a continuous operation3.3tendonassembly of prestressing steel and sheath with anchorages and all necessary auxiliary components to permit grouting, either placed internally or externally to the concrete structure3.4specialist contractorcontractor or construction enterprise which carrie

26、s out grouting of tendons4 Documentation4.1 Execution specificationBefore starting any part of the grouting works, the execution specification relevant to that part of the works shall be complete and available.INTERNATIONAL STANDARD ISO 14824-2:2012(E) ISO 2012 All rights reserved 1BS ISO 14824-2:20

27、12ISO 14824-2:2012(E)The following items shall be included in the execution specification: reference to this part of ISO 14824; reference to other relevant International or national standards; reference to international or national approvals for the post-tensioning kit; reference to other relevant n

28、ational regulations and standards; information and requirements for the particular project prepared to supplement and qualify the requirements of the above listed documents; drawings and other technical documents needed for the execution.In addition, where relevant, procedures shall be established f

29、or: making alterations to previously agreed requirements; distribution, the filing and recording of technical documents used for the works.4.2 Quality planIf a quality control procedure for grouting works is required by the execution specification, it shall be available at the site.4.3 Execution doc

30、umentationThe specialist contractor shall keep available on site written method statements covering materials, equipment, grouting procedures and inspection all adapted to the extent and complexity of the project. Provisions for the case of unusually low or high temperatures or delayed grouting, if

31、likely to occur during the project duration, shall be specified.The specialist contractor shall have shop drawings showing the position and details of the inlets and outlets, and the details of the sealing of the tendon anchorages.The specialist contractor shall keep available on site documented rec

32、ords of: materials and grout used; initial type testing according to ISO 14824-1; suitability testing according to this part of ISO 14824; results of the project specific grouting tests, if specified.The specialist contractor shall keep documented records of the conformity of the materials, equipmen

33、t, grout, grouting operations, and inspection with this standard and the execution specification according to Table 2, Table 3 and Table 4. These records shall be kept for the duration required by national provisions.Any eventual corrective actions taken shall also be recorded.If special documentati

34、on beyond the requirements of this part of ISO 14824 is required for grouting works, the type and extent of the documentation shall be stated in the execution specification.5 MaterialsThe individual materials and the grout to be used shall comply with ISO 14824-1.2 ISO 2012 All rights reservedBS ISO

35、 14824-2:2012ISO 14824-2:2012(E)6 Grout assessment6.1 Suitability testingThe suitability of the grout shall be assessed for each project sufficiently in advance of grouting operations, to enable any necessary adjustments to be made in the use of the materials, equipment or personnel. The extent of s

36、uitability testing and number of tests shall be in accordance with Table 1.Table 1 Extent of suitability testingaTest in accordance with ISO 14824-3 bSuitability testing Number of testsSieve Yes 1 testFluidityYes1 test immediately after mixing 2 tests 30 min after mixingInclined tube Only required i

37、f not already subject to initial type testing with the same type of mixer intended to be used on the project1 test if requiredWick-induced bleed cYes 3 testsVolume change cYes 3 testsCompressive strength dYes 3 testsDensity Yes 1 testaSuitability testing may be waived for structures in Inspection Cl

38、ass 2 subject to there being satisfactory evidence from previous similar projects of full compliance of the grout with the requirements of ISO 14824-1 and documented testing during production in accordance with ISO 14824-1.bOther test methods may be used if the correlation or safe relationship betwe

39、en the results of these test methods and the reference methods in ISO 14824-3 have been established.cTests for bleeding and volume change are performed on the same sample.dThe number of compressive tests may be reduced to one where there is documented evidence from previous projects of full complian

40、ce of the grout with the requirements of ISO 14824-1.The grout assessment shall consist of the preparation of the grout using the materials, equipment and personnel proposed for the project, and testing in accordance with ISO 14824-3. The preparation of the grout shall be carried out under the condi

41、tions expected on site for the project. The assessed grout properties shall comply with ISO 14824-1. The range of acceptable temperatures specified for the particular grout shall be compatible with the expected conditions of the project.6.2 Project specific grouting testsIf required by the execution

42、 specification, project specific grouting tests on tendons in representative forms of the project shall be performed. Such tests should be planned and carried out well in advance of the site operations.NOTE Such project specific grouting tests can be advisable, e.g. when tendon geometry and details

43、are specified on the project for which no prior experience for successful grouting is available. Experience has shown that full-scale tests of grout and grouting procedures can be valuable to prove adequacy. ISO 2012 All rights reserved 3BS ISO 14824-2:2012ISO 14824-2:2012(E)7 Equipment7.1 GeneralGr

44、outing equipment shall consist of a mixer and a pump with all the necessary connection hoses, valves, measuring devices for water, cement, admixtures and additions, and testing equipment as required to perform the grouting of the project.The grouting equipment shall be such that the ducts can be fil

45、led without interruption and at the anticipated speed.Grouting equipment shall include a storage reservoir if required for continuous filling of the tendons on the project. Such storage reservoirs shall have an agitator to keep the grout moving continually before it is pumped into the ducts.The grou

46、ting equipment shall be compatible with the post-tensioning kit provided for the project.7.2 MixerThe mixing equipment shall be capable of producing grout, which possesses an even distribution of cement, and an even dispersal of admixtures, additions, if any, and water. The mixed grout shall contain

47、 no cement lumps as confirmed with the sieve test of ISO 14824-3. The mixed grout shall comply with the requirements of ISO 14824-1.7.3 PumpThe pump shall be capable of providing a continuous flow of grout and maintaining the anticipated pressure for grouting. It shall be equipped with a pressure ga

48、uge and means to prevent unsafe pressure during grouting.The pump shall be constructed in such a way as to prevent introduction of air, oil or other foreign substances into the grout.NOTE 1 Limiting the grout pressure serves to: (a) prevent blow-outs of hoses, inlets and outlets; (b) prevent damage

49、to the concrete structure; (c) protect the equipment and valves from damage; (d) protect the operators.NOTE 2 The use of a pump with a variable output gives the advantage that it can be adapted to the requirements of ducts of different diameters.7.4 HosesThe diameter and rated pressure capacity of the grout hoses shall be compatible with the pump output, the assumed maximum pressure and the length needed.7.5 Inlet connectionsThe connections of the grout hoses to the inlets of the ducts shall be leak tight. Narrow openings in hose c