1、BRITISH STANDARD BS EN ISO 8339:2005 Building construction Sealants Determination of tensile properties (Extension to break) The European Standard EN ISO 8339:2005 has the status of a British Standard ICS 91.100.50 BS EN ISO 8339:2005 This British Standard was published under the authority of the St
2、andards Policy and Strategy Committee on 18 November 2005 BSI 18 November 2005 ISBN 0 580 46764 3 National foreword This British Standard is the official English language version of EN ISO 8339:2005. It is identical with ISO 8339:2005. It supersedes BS EN 28339:1991 which is withdrawn. The UK partic
3、ipation 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. Additional information: For the purpose of this standard
4、the definition of break is taken as the elongation achieved at the point of maximum tensile stress. This figure can either be determined from the stress/strain curve or measured directly by the control software of the tensile testing equipment. Cross-references The British Standards which implement
5、international 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
6、 purport 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 com
7、mittee any enquiries on the interpretation, or proposals for change, and keep 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
8、 foreword page, the ISO title page, pages ii to iv, pages 1 to 6, 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 Comments EUROPEAN STANDARD NORME EUROPENNE EUROP
9、ISCHE NORM EN ISO 8339 June 2005 ICS 91.100.50 Supersedes EN 28339:1990 English version Building construction - Sealants - Determination of tensile properties (Extension to break) (ISO 8339:2005) Construction immobilire - Mastics - Dtermination des proprits de traction (Allongement jusqu rupture) (I
10、SO 8339:2005) Hochbau - Fugendichtstoffe - Bestimmung des Zugverhaltens (Dehnung bis zum Bruch) (ISO 8339:2005) This European Standard was approved by CEN on 25 May 2005. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European
11、 Standard the status of a national standard without any alteration. Up-to-date lists 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, Fr
12、ench, German). A version in any other language made by translation under the responsibility 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, Cyprus, Czech Rep
13、ublic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALI
14、SATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8339:2005: E Foreword This document (EN ISO 8339:2005) has been prepared by Techn
15、ical Committee ISO/TC 59 “Building construction“ in collaboration with CMC. This European Standard shall be given the status of a national standard, either by publication ofan identical text or by endorsement, at the latest by December 2005, and conflicting national standards shall be withdrawn at t
16、he latest by December 2005. This document supersedes EN 28339:1990. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, F
17、rance, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 8339:2005 has been approved by CEN as EN ISO 8339:2005 without
18、any modifications. EN ISO 8339:2005 Reference number ISO 8339:2005(E)INTERNATIONAL STANDARD ISO 8339 Second edition 2005-06-15 Building construction Sealants Determination of tensile properties (Extension to break) Construction immobilire Mastics Dtermination des proprits de traction (Allongement ju
19、squ rupture) EN ISO 8339:2005 ii EN ISO 8339:2005 iii Contents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle. 1 5 Apparatus 1 6 Preparation of test specimens 2 7 Conditioning of test specimens 2 8 Test procedure 3 9 Expression of results . 3 10 Test r
20、eport . 4 EN ISO 8339:2005 iv 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 interes
21、ted 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 C
22、ommission (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 International Standards adopted by the tech
23、nical 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 be the subject of patent rights. ISO
24、shall not be held responsible for identifying any or all such patent rights. ISO 8339 was prepared by Technical Committee ISO/TC 59, Building construction, Subcommittee SC 8, Jointing products. This second edition cancels and replaces the first edition (ISO 8339:1984), which has been technically rev
25、ised. 1 Building construction Sealants Determination of tensile properties (Extension to break) 1 Scope This International Standard specifies a method for the determination of the tensile properties of sealants used in joints in building construction. NOTE A method for the determination of tensile p
26、roperties at maintained extension is specified in ISO 8340. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (i
27、ncluding any amendments) applies. ISO 6927, Building construction Jointing products Sealants Vocabulary ISO 8340, Building construction Sealants Determination of tensile properties at maintained extension ISO 13640, Building construction Jointing products Specifications for test substrates 3 Terms a
28、nd definitions For the purpose of this document, the definitions given in ISO 6927 apply. 4 Principle Test specimens are prepared such that the sealant to be tested adheres to two parallel contact surfaces. The test specimens are extended to break and the tensile properties are recorded on a force/e
29、xtension diagram. The test results are used to calculate the secant modulus and the extension to break 5 Apparatus 5.1 Substrate materials, used for the preparation of test specimens as defined in ISO 13640. The substrate materials shall be selected from mortar and/or anodized aluminium and/or glass
30、. Other substrate materials may be used as agreed by the parties concerned. For each test specimen two substrate pieces of the same material are required with a cross section of dimensions as shown in Figures 1 and 2. Test substrates of other dimensions may be used, but then the dimensions of the se
31、alant bead and the area of adhesion shall be the same as those shown in Figures 1 and 2. 5.2 Spacers, of cross section (12 mm 12 mm) with anti-adherent surface. For the preparation of test specimens see Figures 1 and 2. EN ISO 8339:20052 5.3 Anti-adherent substrate, for the preparation of the test s
32、pecimens, e.g. polyethylene (PE) film, preferably according to the advice of the sealant manufacturer. 5.4 Tensile test machine, with recording device, capable of extending the test specimens at a rate of (5,5 0,7) mm/min. 5.5 Refrigerated enclosure, capable of holding the test specimens whilst exte
33、nded at a temperature of ( 20 2) C. 5.6 Ventilated convection-type oven, capable of being maintained at (70 2) C for conditioning according to method B (see 7.3). 5.7 Container, for immersing test specimens in distilled water for conditioning according to method B (see 7.3). 6 Preparation of test sp
34、ecimens The sealant and test substrates shall be brought to (23 2) C. For each substrate type and each test temperature (see Clause 8) three test specimens shall be prepared. For each specimen, two substrates (5.1) and two spacers (5.2) shall be assembled (see Figure 1) and set on the anti-adherent
35、substrate (5.3). 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 volume formed by the substrates and the spacers shall be filled with the sealant. The following p
36、recautions shall be taken. a) The formation of air bubbles shall be avoided. b) The sealant shall be pressed on the inner surfaces of the substrates. c) The sealant surface shall be trimmed so that it is flush with the faces of the substrates and spacers. The test specimens shall be set on the edge
37、of one of the supports. The anti-adherent substrate shall be removed as soon as possible. The specimens shall be placed 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 te
38、st specimens shall be conditioned either in accordance with method A (see 7.2) or method B (see 7.3), as agreed between the parties concerned. 7.2 Method A The test specimens shall be conditioned for 28 days at (23 2) C and (50 5) % relative humidity. 7.3 Method B The test specimens shall be conditi
39、oned according to method A and shall then be subjected three times to the following storage cycle: a) three days in the oven (5.6) at (70 2) C; EN ISO 8339:20053 b) one day in distilled water (5.7) at (23 2) C; c) two days in the oven (5.6) at (70 2) C; d) one day in distilled water (5.7) at (23 2)
40、C. Alternatively, this cycle may be carried out in the order c), d), a), b). After conditioning according to method B, the test specimens shall be stored for 24 h at (23 2) C and (50 5) % relative humidity before testing. NOTE Method B is a normal conditioning procedure using the influence of heat a
41、nd water. It is not suitable for giving information on the durability of the sealant. 8 Test procedure 8.1 General The test procedure shall be carried out at temperatures of (23 2) C and ( 20 2) C. Three test specimens shall be tested at each temperature. 8.2 Test procedure at (23 2) C The spacers (
42、5.2) for the preparation of the test specimens shall be removed and the test specimen placed in the tensile test machine (5.4) and extended at (23 2) C at a rate of (5,5 0,7) mm/min until rupture occurs. The force/extension diagram shall be recorded. 8.3 Test procedure at ( 20 2) C The test specimen
43、s shall be stored (5.5) at ( 20 2) C for at least 4 h before the start of the test. The spacers (5.2) for the preparation of the test specimens shall be removed and the test specimen placed in the tensile test machine (5.4) and extended at ( 20 2) C at a rate of (5,5 0,7) mm/min until rupture occurs
44、. The force/extension diagram shall be recorded. 9 Expression of results 9.1 Secant modulus For each test specimen, the secant modulus ( ) at the chosen elongation shall be calculated using the equation rounded to 0,01 N/mm 2 : = F/s where is the secant modulus, expressed in newtons per square milli
45、metre; F is the force at chosen elongation, expressed in newtons; s is the initial cross section area of test specimen, expressed in square millimetres. 9.2 Elongation at break For each test specimen the elongation at break shall be calculated using the equation: Elongation % = (final width original
46、 width)/(original width) 100 The results shall be expressed to the nearest 5 %. EN ISO 8339:20054 10 Test report The test report shall contain the following information: a) test laboratorys name and date of test; b) reference to this International Standard; c) name, type (chemical family) and colour
47、 of sealant; d) batch of sealant from which the test specimens were produced; e) substrate used (see 5.1); f) primer used, if applicable; g) method of conditioning used (see Clause 7); h) secant modulus for each test specimen at the chosen elongation (100 % or 60 %, or any other elongation as decide
48、d by the parties concerned); i) arithmetic mean of the three secant moduli; j) elongation at break for each test specimen; k) arithmetic mean of the three elongations at break; l) type of break (adhesion and/or cohesion) observed for each test specimen; m) any deviations from this International Stan
49、dard. EN ISO 8339:20055 Dimensions in millimetres Key 1 mortar substrates 2 sealant 3 spacer (5.2) Figure 1 Test specimen with mortar substrates EN ISO 8339:20056 Dimensions in millimetres Key 1 anodized aluminium or glass substrates 2 sealant 3 spacer (5.2) Figure 2 Test specimen with anodized aluminium or glass substrates EN ISO 8339:2005
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