1、| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | BRITISH STANDARD BS EN 524-6 : 1997 The Eu
2、ropean Standard EN 524-6 : 1997 has the status of a British Standard ICS 77.140.75; 91.080.40 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW Steel strip sheaths for prestressing tendons Test methods Part 6. Determination of leaktightness (determination of water loss)This Brit
3、ish Standard, having been prepared under the direction of the Sector Board for Building and Civil Engineering, was published under the authority of the Standards Board and comes into effect on 15 November 1997 BSI 1997 ISBN 0 580 28667 3 BS EN 524-6 : 1997 Amendments issued since publication Amd. No
4、. Date Text affected National foreword This British Standard is the English language version of EN 524-6 : 1997. The UK participation in its preparation was entrusted by Technical Committee B/525, Building and civil engineering structures, to Subcommittee B/525/2, Structural use of concrete, which h
5、as the responsibility to: aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A lis
6、t of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled Internationa
7、l Standards Correspondence Index, or by using the Find facility of the BSI Standards Electronic Catalogue. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, an EN title page, pa
8、ges 2 to 4, an inside back cover and a back cover.CEN European Committee for Standardization Comite Europe en de Normalisation Europa isches Komitee fu r Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 Copyright reserved to CEN members. Ref. No. EN 524-6 : 1997 E EUROPEAN STAND
9、ARD EN 524-6 NORME EUROPE ENNE EUROPA ISCHE NORM March 1997 ICS 77.140.75; 91.080.40 Descriptors: Prestressed concretes, tubes, sheathing, prestressing steels, classifications, specification, verification, marking English version Steel strip sheaths for prestressing tendons Test methods Part 6: Dete
10、rmination of leaktightness (determination of water loss) Gaines en feuillard dacier pour ca bles de pre contrainte Me thodes dessai Partie 6: De termination de le tanche ite (determinatinon des pertes en eau) Hu llrohre aus Bandstahl fu r Spannglieder Pru fverfahren Teil 6: Bestimmung der Dichtheit
11、(Bestimmung des Wasserverlustes) This European Standard was approved by CEN on 1997-01-27. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date l
12、ists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the res
13、ponsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norw
14、ay, Portugal, Spain, Sweden, Switzerland and United Kingdom.Page 2 EN 524-6 : 1997 BSI 1997 Foreword This European Standard has been prepared by Technical Committee CEN/TC 104, Concrete (performance, production, placing and compliance criteria), the Secretariat of which is held by DIN. This standard
15、 is a part of the series EN 524 Sheaths for prestressing tendons Test methods which additionally comprises the following Parts Part 1 Determination of shape and dimensions Part 2 Determination of flexural behaviour Part 3 To-and-fro bending test Part 4 Determination of lateral load resistance Part 5
16、 Determination of tensile load resistance These European Standards apply to EN 523 Steel strip sheaths for prestressing tendons Terminology, requirements, quality control. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endors
17、ement, at the latest by September 1997, and conflicting national standards shall be withdrawn at the latest by September 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Be
18、lgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1 Scope 3 2 Normative references 3 3 Test procedure when quality control of finished sheaths is carried ou
19、t 3 4 Test procedure for use in production control 3Page 3 EN 524-6 : 1997 BSI 1997 1 Scope This European Standard specifies the procedure for determining the leaktightness of sheaths for prestressing tendons which comply with EN 523. 2 Normative references This European Standard incorporates by dat
20、ed or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard
21、only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 523 : 1997 Steel strip sheaths for prestressing tendons Terminology, requirements, quality control EN 524-3 Steel strip sheaths for prestressing tendons Test me
22、thods Part 3: To-and-fro bending test 3 Test procedure when quality control of finished sheaths is carried out The test shall be conducted on a 1100 mm long specimen which has previously been subjected to the tests required by 5.1.6 to 5.1.8 of EN 523. The specimen shall be filled with water after w
23、hich it shall be subjected to a constant internal pressure of 0,5 bar (50 kPa) by adequate equipment (e.g. by sealing the top of the specimen and inducing air pressure). The water loss which occurs within a period of 5 min shall be measured with an accuracy of 3 % and recorded to the nearest 0,1 %.
24、NOTE. A method for determining the percentage water loss consists e.g. of measuring the height of water from the top of the specimen before applying and after releasing the pressure and relating this change in distance to the initial filling height. The distance measurement should have an accuracy o
25、f at least 0,5 mm. 4 Test procedure for use in production control For the routine checks of the running production the 1100 mm long specimen has to be subjected only to the to-and-fro bending procedure given in EN 524-3 before carrying out the leaktightness test described in the foregoing clause 3.B
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