BS EN ISO 7389-2003 Building construction - Jointing products - Determination of elastic recovery of sealants《房屋建筑 连接件 密封件回弹性的测定》.pdf

1、BRITISH STANDARD BS EN ISO 7389:2003 Building construction Jointing products Determination of elastic recovery of sealants The European Standard EN ISO 7389:2003 has the status of a British Standard ICS 91.100.50 BS EN ISO 7389:2003 This British Standard was published under the authority of the Stan

2、dards Policy and Strategy Committee on 10 December 2003 BSI 10 December 2003 ISBN 0 580 43049 9 National foreword This British Standard is the official English language version of EN ISO 7389:2003. It is identical with ISO 7389:2002. It supersedes BS EN 27389:1991 which is withdrawn. The UK particip

3、ation in its preparation was entrusted to Technical Committee B/547, Sealants for building and construction, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement inte

4、rnational or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not pur

5、port to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committ

6、ee 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. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO

7、 foreword page, the ISO title page, pages ii and iii, a blank page, pages 1 to 5, the Annex ZA page, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROP

8、EANSTANDARD NORMEEUROPENNE EUROPISCHENORM ENISO7389 November2003 ICS91.100.50 SupersedesEN27389:1990 Englishversion BuildingconstructionJointingproductsDeterminationof elasticrecoveryofsealants(ISO7389:2002) ConstructionimmobilireProduitspourjoints Dterminationdelarepriselastiquedesmastics(ISO 7389:

9、2002) HochbauFugendichtstoffeBestimmungdes Rckstellvermgens(ISO 7389:2002) ThisEuropeanStandardwasapprovedbyCENon25September2003. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.

10、Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsow

11、nlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerland

12、andUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.ENISO7389:2003EINESO37:9802(30E) 2 Forew

13、ord ThetextofISO7389:2002hasbeenpreparedbyTechnicalCommitteeISO/TC59“Building construction”oftheInternationalOrganizationforStandardization(ISO)andhasbeentaken overasENISO7389:2003byCMC. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationof anidenticaltextorbyendorsement

14、,atthelatestbyMay2004,andconflictingnationalstandards shallbewithdrawnatthelatestbyMay2004. ThisdocumentsupersedesEN27389:1990. AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsof thefollowingcountriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,Czech Republic

15、,Denmark,Finland,France,Germany,Greece,Hungary,Iceland,Ireland,Italy, Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,Switzerlandand theUnitedKingdom. Endorsementnotice ThetextofISO7389:2002hasbeenapprovedbyCENasENISO7389:2003withoutany modifications. NOTENormativereferencestoInte

16、rnationalStandardsarelistedinAnnexZA(normative). ENISO7389:2003INTERNATIONAL STANDARD ISO 7389 Third edition 2002-10-01 Reference number ISO 7389:2002(E) OSI 2002 Building construction Jointing products Determination of elastic recovery of sealants Construction immobilire Produits pour joints Dtermi

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22、2002 r llAithgs reservde iii Foreword ISO (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 technical committees. Each member body interest

23、ed 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 with the International Electrotechnical Co

24、mmission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication a

25、s 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 International Standard may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such pa

26、tent rights. International Standard ISO7389 was prepared by Technical Committee ISO/TC59, Building construction, Subcommittee SC 8, Jointing products. This third edition cancels and replaces the second edition (ISO 7389:1987), subclauses 5.1 and 5.7 and clause 8 of which have been technically revise

27、d. ENISO7389:2003blank ENISO7389:2003ANRETNIITOTS LANDNADRA ISO 8372002:9)E( ISO 2002 r llAithgs reservde 1 Building construction Jointing products Determination of elastic recovery of sealants 1 Scope This International Standard specifies a method for the determination of the elastic recovery of se

28、alants after maintained extension. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do no

29、t apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Member

30、s of ISO and IEC maintain registers of currently valid International Standards. ISO 6927, Building construction Jointing products Sealants Vocabulary ISO 13640, Building construction Jointing products Specifications for test substrates 3 Terms and definitions For the purposes of this International S

31、tandard, the terms and definitions given in ISO 6927 apply. 4 Principle The test sealant is extended, held in extension and released. The elastic recovery is expressed as a percentage of the extension. 5A p p a r a t u s 5.1 Substrate materials used for the preparation of test specimens are defined

32、in ISO 13640. The materials shall be selected from mortar or anodized aluminium or glass. Other substrate materials may be used as agreed by the parties concerned. For each test specimen, two supports of the same material are required with dimensions as shown in Figures 1 and 2. Test substrates of o

33、ther dimensions may be used, but then the dimensions of the sealant bead and the area of adhesion shall be the same as those shown in Figures 1 and 2. 5.2 Spacers, for the preparation of the test specimens, of cross-section , with anti-adherent surface. 5.3 Spacers, with a width of or or , to hold t

34、he test specimens at an elongation of ,or respectively (see Table 1). 5.4 Anti-adherent substrate, for the preparation of test specimens, e.g. polyethylene (PE) film, preferably according to the advice of the sealant manufacturer. 12 mm 12 mm 15 mm 19,2 mm 24 mm 25 % 60 % 100 % ENISO7389:2003ISO :98

35、37(2002)E 2 ISO 2002 Ar llithgr seresvde 5.5 Ventilated convection-type oven, capable of operating at for conditioning according to method B. 5.6 Container for water immersion of the specimen for conditioning according to method B. 5.7 Extension machine, capable of extending at a rate of . 5.8 Verni

36、er inside caliper, accurate to . 6 Preparation of test specimens The sealant and the test substrate shall be brought to . For each substrate three test specimens shall be prepared. For each specimen, two supports (5.1) and two spacers (5.2) shall be assembled (see Figure 1) and set up on the anti-ad

37、herent substrate (5.4). The instructions of the sealant manufacturer concerning, for instance, whether a primer is to be used and the mixing procedure for multi-component sealants shall be followed. The hollow void formed by the substrates shall be filled with the sealant. The following precautions

38、shall be taken: a) the formation of air bubbles shall be avoided; b) the sealant shall be pressed to the contact surfaces of the substrates; c) the sealant surface shall be trimmed so that it is flush with the faces of the substrates and the spacers. The test specimens shall be set on edge of one of

39、 the supports and the anti-adherent shall be removed as soon as possible. The test specimens shall rest in this position to allow curing or optimum drying of the sealant. The spacers shall be maintained in place during conditioning. 7 Conditioning of test specimens 7.1 General The test specimens sha

40、ll be conditioned either according to method A (see 7.2) or method B (see 7.3). 7.2 Conditioning method A The test specimens shall be conditioned for 28 days at and relative humidity. 7.3 Conditioning method B First the test specimens shall be conditioned according to method A and subsequently subje

41、cted three times to the following storage cycle: a) 3 days in the oven (5.5) at ; b) 1 day in distilled water (5.6) at ; c) 2 days in the oven (5.5) at ; d) 1 day in distilled water (5.6) at . This cycle may be carried out alternatively in the sequence: c) d) a) b). After conditioning according to m

42、ethod B, the test specimens shall be stored for a further period of atand relative humidity before testing. (70 2) C (5,5 0,7) mm/min 0,1 mm (23 2) C (23 2) C (50 5) % (70 2) C (23 2) C (70 2) C (23 2) C 24 h (23 2) C (50 5) % ENISO7389:2003ISO 8372002:9)E( ISO 2002 r llAithgs reservde 3 NOTE Condit

43、ioning method B is a normal conditioning procedure using the influence of heat and water. It is not intended to give information on the durability of the sealant. 8 Procedure The test shall be carried out at and relative humidity and all measurements shall be taken with the vernier caliper (5.8). Th

44、e measurements may be made either between the contact surfaces or may include them. The spacers used for the preparation of the test specimens shall be removed and the initial width, , shall be measured at both ends of each test specimen. The test specimens shall be placed in the extension machine (

45、5.7) and extended at a rate of to or or of the initial width, or by any other percentage as agreed by the parties concerned. is the width after elongation. Table 1 gives the correspondence between the percentage elongation and the final elongated width for a test specimen of initial width. The elong

46、ation shall be maintained for using the appropriate spacers. After this time the spacers shall be removed and the test specimens shall be placed, with the long axis vertical, on a smooth low-friction surface such as a talc-dusted glass plate. After , the width after elastic recovery, , shall be meas

47、ured at both ends of each test specimen. For , and , the arithmetic mean of the respective measurements at both ends of the test specimen shall be calculated. 9 Expression of results The elastic recovery of each test specimen shall be calculated, by the equation where is the elastic recovery, in per

48、cent; is the initial width, in millimetres, between the contact surfaces after conditioning; is the width, in millimetres, between the contact surfaces under elongation; is the width, in millimetres, between the contact surfaces after elastic recovery. Values are rounded to the nearest . The arithmetic mean of the three el