《BS-ISO-11431-1993.pdf》由会员分享,可在线阅读,更多相关《BS-ISO-11431-1993.pdf(12页珍藏版)》请在三一文库上搜索。
1、BRITISH STANDARD BS ISO 11431:1993 Implementation of ISO 11431:1993 Building construction Sealants Determination of adhesion/cohesion properties after exposure to artificial light through glass Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
2、 BS ISO 11431:1993 This British 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 April 1995 BSI 11-1999 The following BSI references relate to the work on th
3、is standard: Committee reference B/547 Draft for comment 91/17123 DC ISBN 0 580 24111 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee B/547, Sealants for building and construction, upon which the following bodies were r
4、epresented: Aluminium Window Association Association of Sealant Applicators British Adhesives and Sealants Association Building Employers Confederation Department of the Environment (Building Research Establishment) Flat Glass Manufacturers Association Glass and Glazing Federation Local Authority Or
5、ganizations Society of Chemical Industry Water Services Association of England and Wales Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 11431:1993 BSI 11-1999i Contents Page Co
6、mmittees responsibleInside front cover National forewordii Forewordiii Text of ISO 114311 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 11431:1993 ii BSI 11-1999 National foreword This British Standard reproduces verbatim ISO 11431:
7、1993 and implements it as the UK national standard. This British Standard is published under the direction of the Sector Board for Building and Civil Engineering whose Technical Committee B/547 has the responsibility to: aid enquirers to understand the text; present to the responsible international
8、committee any enquiries on interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. NOTEInternational and European Standards, as well as overseas standards, are available from Customer Services, BS
9、I, 389 Chiswick High Road, London W4 4AL. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations.
10、 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the ISO title page, pages ii to iv, pages 1 to 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment tab
11、le on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11431:1993(E) ii BSI 11-1999 Contents Page Forewordi
12、ii 1Scope1 2Normative references1 3Definitions1 4Principle1 5Apparatus1 6Preparation of test specimens and reference specimens1 7Conditioning2 8Test procedures2 9Test report3 Figure 1 Assembly for test and reference specimens2 Figure 2 Water immersion of test specimen3 Table 1 Joint widths after ext
13、ension3 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11431:1993(E) BSI 11-1999iii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work o
14、f preparing International Standards is normally carried out through ISO technical 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-governmenta
15、l, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting.
16、Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 11431 was prepared by Technical Committee ISO/TC 59, Building construction, Sub-Committee SC 8, Jointing products. Licensed Copy: sheffieldun sheffieldun, na, M
17、on Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11431:1993(E) BSI 11-19991 1 Scope This International Standard specifies a method for the determination of the adhesio
18、n/cohesion properties of sealants after exposure to artificial light through glass, to water or humidity, and to elevated temperature. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the
19、 time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO m
20、aintain registers of currently valid International Standards. ISO 4665-3:1987, Rubber, vulcanized Resistance to weathering Part 3: Methods of exposure to artificial light. ISO 6927:1981, Building construction jointing products Sealants Vocabulary. 3 Definitions For the purposes of this International
21、 Standard, the definitions given in ISO 6927 apply. 4 Principle Test specimens and reference specimens are prepared in which the sealant to be tested adheres to two parallel contact surfaces. After submission of the test specimens to the simultaneous influence of artificial light, water or humidity
22、and elevated temperature under defined conditions, test specimens and reference specimens are extended to a defined width. After maintenance of the extension for a defined time, any breaks in adhesion or cohesion are recorded. 5 Apparatus 5.1 Clear float glass supports, for the preparation of test s
23、pecimens and reference specimens (two supports are required for each specimen), of dimensions as shown in Figure 1. 5.2 Spacers, for the preparation of the specimens, of dimensions 12 mm 12 mm 12,5 mm with non-adherent surface (see Figure 1). NOTE 1If the spacers are made of a material to which the
24、sealant adheres, their surfaces should be made non-adherent, e.g. by a thin wax coating. 5.3 Non-adherent substrate, for the preparation of test specimens, e.g. polytetrafluoroethylene (PTFE) film or vellum paper, preferably on the advice of the sealant manufacturer. 5.4 Ventilated convection-type o
25、ven, capable of being maintained at 70 C 2 C, and having an air exchange rate of 30 5 times per hour, for conditioning according to method B. 5.5 Container, filled with distilled water, for conditioning according to method B. 5.6 Water container with heating device, for immersing the test specimens,
26、 capable of maintaining a water temperature of 45 C 2 C, for testing according to procedure 1. 5.7 Climatic chamber, for holding the artificial light source and the test specimens, capable of being maintained at a temperature of 45 C 2 C and a minimum relative humidity of 95 %, for testing according
27、 to procedure 2. 5.8 Artificial light source, for xenon arc lamp in accordance with ISO 4665-3:1987, 4.1.2. 5.9 Black panel thermometer, with a blackened absorbing metal plate that approximates the absorption characteristics of a “black body”. The plate shall be at least 1 mm thick and of a size sui
28、table for the test specimen holders. The temperature of the metal plate is measured by a suitable thermometer or thermocouple with good thermal contact. For measuring the test temperature, the metal plate shall be mounted in a test specimen holder with the blackened side of the metal plate facing th
29、e artificial light source. Readings shall only be taken after sufficient time has elapsed for the temperature to become steady. The temperature shall be controlled by adjusting the air exchange rate. NOTE 2Temperature control may be achieved by means of a thermostat, the sensor of which is placed in
30、 the climatic chamber. 5.10 Test machine, with recording device, capable of extending the test specimens at a rate of 5 mm/min to 6 mm/min. 5.11 Spacers, with a width of 19,2 mm or 24 mm, to hold the specimens at an extension of 160 % or 200 %, respectively. 6 Preparation of test specimens and refer
31、ence specimens Six test specimens and three reference specimens shall be prepared. For each test specimen, two supports (5.1) and two spacers (5.2) shall be assembled (see Figure 1) and set up on the non-adherent substrate (5.3), which should be wetted by water containing a detergent to facilitate t
32、heir subsequent removal. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11431:1993(E) 2 BSI 11-1999 The instructions of the sealant manufacturer shall be followed concerning, for instance, whether a primer is to be used. The hollow volu
33、me formed by the supports and spacers shall be filled with the sealant which has been conditioned for 24 h at 23 C 2 C. The following precautions shall be taken: a) avoid the formation of air bubbles; b) press the sealant to the inner surfaces of the supports; c) trim the sealant surface so that it
34、is flush with the faces of the supports and spacers. The specimens shall be set on edge on one of the supports and the non-adherent substrate shall be removed as soon as possible. The specimens shall remain in this position with the spacers in place for another 48 h to allow curing or optimum drying
35、 of the sealant. 7 Conditioning 7.1 General Test specimens and reference specimens shall be conditioned either in accordance with method A or method B, as agreed between the parties concerned. 7.2 Method A The specimens shall be conditioned for 28 days at 23 C 2 C and (50 5) % relative humidity. 7.3
36、 Method B The specimens shall be conditioned according to method A and shall then be subjected three times to the following storage cycle: a) 3 days in the oven (5.4) at 70 C 2 C; b) 1 day in a container (5.5) filled with distilled water at a temperature of 23 C 1 C; c) 2 days in the oven at 70 C 2
37、C; d) 1 day in distilled water at a temperature of 23 C 1 C. Alternatively, this cycle may be performed in the order c) to d) to a) to b). NOTE 3Method B is a commonly used conditioning procedure using the influence of heat and water. It is not suitable for giving information on the durability of th
38、e sealant. 8 Test procedures 8.1 General After conditioning and removal of the spacers, test the six test specimens according to either procedure 1 or procedure 2. Store the three reference specimens for 22 days at 23 C 2 C and at (50 5) % relative humidity. 8.2 Procedure 1 Store the six test specim
39、ens for 21 days in the container (5.6) filled with distilled water at a temperature of 45 C 2 C, in such a way that one glass surface of each test specimen remains above the water level (see Figure 2). During storage, expose three of the test specimens to radiation by the artificial light source (5.
40、8) ensuring that the radiation is perpendicular to the interfaces between the sealant and the supports. The remaining three test specimens are masked initially so that they are not affected by the radiation. Figure 1 Assembly for test and reference specimens Licensed Copy: sheffieldun sheffieldun, n
41、a, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ISO 11431:1993(E) BSI 11-19993 8.3 Procedure 2 Store the six test specimens for 21 days in a climatic chamber (5.7) at a temperature of 45 C 2 C (measured on the black panel) and a relative humidity of more than 95 %. During storage,
42、expose three of the test specimens to radiation by the artificial light source (5.8) ensuring that the radiation is perpendicular to the interfaces between the sealant and the supports. The remaining three test specimens are masked initially so that they are not affected by the radiation. 8.4 Extens
43、ion After testing according to procedure 1 or procedure 2, store the six test specimens for 24 h at 23 C 2 C and (50 5) % relative humidity. Subsequently, place the six test specimens and the three reference specimens on the test machine (5.10) and extend them to 160 % or 200 % of their original wid
44、th at a rate of 5 mm/min to 6 mm/min. Maintain the extension for 24 h using appropriate spacer bars. Table 1 gives the joint widths, l1, in millimetres, after extension of the test specimens having an initial width, l0, of 12 mm. Table 1 Joint widths after extension Examine the joint for any break i
45、n adhesion or cohesion. 9 Test report The test report shall include the following information: a) reference to this International Standard; b) name and type of sealant; c) batch of sealant from which the specimens were produced, if possible; d) the primer used, if applicable; e) the method of condit
46、ioning used (see clause 7); f) the test procedure used; g) the extension used (see clause 8); h) all details of any break in adhesion or cohesion; i) any differences in the appearance of the test specimens in comparison with the reference specimens; j) any deviations from the specified test conditio
47、ns. Figure 2 Water immersion of test specimen Ratio l1/l0 % Final joint width, l1 mm 160 200 19,2 24 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 27 08:36:00 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS ISO 11431:1993 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution
48、 BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision. Users of British Standards should m
49、ake sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individual updating service called PLUS which ens
链接地址:https://www.31doc.com/p-3747365.html