BS ISO 11617-2014 Buildings and civil engineering works Sealants Determination of changes in cohesion and appearance of elastic weatherproofing sealants after exposure of staticalle.pdf

1、BSI Standards PublicationBS ISO 11617:2014Buildings and civil engineeringworks Sealants Determination of changesin cohesion and appearanceof elastic weatherproofingsealants after exposure ofstatically cured specimensto artificial weathering andmechanical cyclingBS ISO 11617:2014 BRITISH STANDARDNati

2、onal forewordThis British Standard is the UK implementation of ISO 11617:2014.The UK participation in its preparation was entrusted to TechnicalCommittee B/547, Sealants for building and construction.A list of organizations represented on this committee can beobtained on request to its secretary.Thi

3、s publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77424 9ICS 91.100.50Compliance with a British Standard cannot confer imm

4、unity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2014.Amendments issued since publicationDate Text affectedBS ISO 11617:2014 ISO 2014Buildings and civil engineering works Sealants Determination of changes in

5、cohesion and appearance of elastic weatherproofing sealants after exposure of statically cured specimens to artificial weathering and mechanical cyclingBtiments et ouvrages de gnie civil Mastics Dtermination des variations de cohsion et apparence des mastics lastiques rsistants aux intempries aprs e

6、xposition dprouvettes statiquement polymrises un cycle mcanique et de vieillissement artificielINTERNATIONAL STANDARDISO11617First edition2014-07-01Reference numberISO 11617:2014(E)BS ISO 11617:2014ISO 11617:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserv

7、ed. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO

8、at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 11617:2014ISO 11617:2014(E) ISO 2014 All rights reserved iiiCo

9、ntents PageForeword iv1 Scope . 12 Normative reference . 13 Definitions . 14 Principle 25 Apparatus . 25.1 Support 25.2 Spacers . 35.3 Backing material (bond breaker) 35.4 Separators . 35.5 Container 45.6 Ventilated convection-type oven . 45.7 Fully automated test chamber with an artificial light so

10、urce . 45.8 Artificial light source 55.9 Black standard (insulated) and black panel (uninsulated) temperature sensors 56 Preparation of test specimens 67 Conditioning 67.1 General . 67.2 Method A (default) 67.3 Method B (option) 68 Test procedure 78.1 General . 78.2 Accelerated weathering exposure c

11、onditions (default period: six weeks) . 78.3 Mechanical cycling . 89 Examination for defects 910 Photo documentation of test specimens .1311 Continuation of degradation cycles .1312 Test report 14Annex A (informative) .15Bibliography .16BS ISO 11617:2014ISO 11617:2014(E)ForewordISO (the Internationa

12、l 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 interested in a subject for which a technical committee has been es

13、tablished 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 Commission (IEC) on all matters of electrotechnical standardi

14、zation.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance w

15、ith the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any

16、 patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.

17、For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible fo

18、r this document is ISO/TC 59, Buildings and civil engineering works, Subcommittee SC 8, Sealants.iv ISO 2014 All rights reservedBS ISO 11617:2014INTERNATIONAL STANDARD ISO 11617:2014(E)Buildings and civil engineering works Sealants Determination of changes in cohesion and appearance of elastic weath

19、erproofing sealants after exposure of statically cured specimens to artificial weathering and mechanical cycling1 ScopeThis International Standard specifies laboratory exposure procedures for determining the effects of cyclic movement and artificial weathering on cured, elastic weatherproofing joint

20、 sealants (one- or multi-component).2 Normative referenceThe following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the refere

21、nced document (including any amendments) applies.ISO 4628-4:2003, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 4: Assessment of degree of crackingISO 4892-1:1999, Plastics Methods of exp

22、osure to laboratory light sources Part 1: General guidanceISO 4892-2:2013, Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc lampsISO 4892-3:2013, Plastics Methods of exposure to laboratory light sources Part 3: Fluorescent UV lampsISO 4892-4:2013, Plastics Methods of exposu

23、re to laboratory light sources Part 4: Open-flame carbon-arc lampsISO 6927:2012, Buildings and civil engineering works Sealants VocabularyISO 8339:2005, Building construction Sealants Determination of tensile properties (Extension to break)ISO 11431:2002, Building construction Jointing products Dete

24、rmination of adhesion/cohesion properties of sealants after exposure to heat, water and artificial light through glassISO 11600:2002, Building construction Jointing products Classification and requirements for sealantsISO 13640:1999, Building construction Jointing products Specifications for test su

25、bstratesCIE Publication No. 20-1972, Recommendations for the integrated spectral irradiance and the spectral distribution of simulated solar radiation for testing purposesCIE Publication No. 85-1989, Technical report Solar spectral irradiance, ISBN 3 900 734 22 43 DefinitionsFor the purposes of this

26、 document, the definitions given in ISO 6927 apply. ISO 2014 All rights reserved 1BS ISO 11617:2014ISO 11617:2014(E)Any notation in this standard shown as target set value x operational fluctuation y shall be interpreted as follows: set the experimental parameter at the target value x and maintain t

27、he experimental parameter during the test procedure at y from the specified setting x. If the operational fluctuations exceed the maximum allowable value after the equipment has stabilized, discontinue the test and correct the cause of the problem before continuing.4 PrincipleTest specimens are prep

28、ared in which the sealant to be tested adheres to two parallel support surfaces (substrates). The specimens are conditioned statically (no movement) in a controlled climate. The conditioned specimens are then exposed to repetitive degradation cycles of artificial weathering (light, heat, and moistur

29、e) and cyclic movement under controlled environmental conditions. Within each cycle, weathering is carried out for six weeks in an artificial weathering machine. Simultaneously, with the weathering, mechanical cycling is carried out by changing the position of the extension/compression once a week.

30、After completion of each degradation cycle (each lasting six weeks), the specimens (in their extended/compressed state) are visually examined for changes in appearance, cohesion, and adhesion of the sealant beads. The rating for quantity, width, and depth of cohesive cracks for a specific extension/

31、compression value achieved along the length of the specimen as well as the depth, length, and range of any very significant loss of cohesion or adhesion (defined as 3 mm crack depth) is determined and the general condition of the sealant is reported. The weathering and mechanical cycling exposure an

32、d the examination for failures constitute a degradation cycle and the degradation cycle is repeated as often as desired to achieve a certain exposure.5 Apparatus5.1 SupportAnodized aluminium support (as shown in Figure 1) for the preparation of test specimens, consisting of two pivoting, L-shaped an

33、odized aluminium support elements of dimensions 120 mm 18 mm 18 mm (length width height) and 2 mm thickness riveted onto an anodized aluminium base-plate of 2 mm thickness such that a cavity of dimensions 120 mm 20 mm 18 mm (length width height) is formed. Riveting of the support elements on the bas

34、e-plate shall be such that they can be turned freely with minimal friction on the pivot (fulcrum). The base plate holds five equally spaced holes of 5 mm diameter (for improved ventilation of the back face of the sealant such as to ensure better cure or drying of the sealant) and two 3 mm holes for

35、fixation of the specimen (see Figure 1 and Annex A). For the specification of the anodized aluminium, refer to ISO 13640. All surfaces of the anodized aluminium support to be later in contact with the sealant shall be cleaned according to the sealant manufacturers recommendation.NOTE Achieving optim

36、um adhesion on the support substrate is important in order to obtain reproducible ratings for surface and bulk degradation (cracking, crazing, cohesive failure, etc.) that is induced or influenced by mechanical cycling. Even a partial loss of adhesion will cause a section of the test specimen to be

37、exposed to no or a lower degree of mechanical cycling than intended for a given movement amplitude of the sealant and invalidate the results obtained for this movement exposure (as assessed along the extended leg of the test specimen). Currently, no cleaning procedure and cleaning agent(s) have been

38、 identified that provide optimum adhesion on the support substrate for all sealant products. Therefore, no cleaning procedure is specified in this International Standard. If the manufacturer does not provide a recommendation for the cleaning procedure, the following method is suggested for considera

39、tion by the experimenter: Clean all surfaces of the anodized aluminium support to be later in contact with the sealant with high purity acetone (purity, by gas chromatography: 99,8 %) as follows: a) saturate a clean, lint-free paper tissue or cloth with the solvent; b) clean the substrate with the s

40、olvent-saturated cloth or tissue by wiping a minimum of three times so that visible contamination cannot be observed; c) wipe the substrate with solvent-saturated cloth or tissue and immediately afterwards dry wipe the substrate surface thoroughly using a dry, clean, lint-free paper tissue or cloth

41、before the solvent completely evaporates. Repeat step c) at least once. In each wipe of the substrate surface during step c), a new, uncontaminated cloth or tissue should be used. For severely contaminated substrates, additional pre-cleaning steps can be required.If other support materials are to be

42、 used, they shall be characterized and shall be described in the test report. If other support dimensions are used, they shall be described in the test report.2 ISO 2014 All rights reservedBS ISO 11617:2014ISO 11617:2014(E)Figure 1 Schematic drawing of test specimen Sealant in anodized aluminium sup

43、port used for cyclic mechanical movement of sealant (all units in mm)5.2 SpacersSpacers for the preparation of the specimens, of dimensions 20 mm 18 mm 10 mm, with anti-adherent surface (see Figure 1) shall be used. If the spacers are made of material to which the sealant adheres, their surface shal

44、l be made anti-adherent, e.g. by a thin wax coating.5.3 Backing material (bond breaker)Open-cell foam backing material polyethylene (PE) or polyurethane (PU) foam of 3 mm thickness for the preparation of test specimens shall be used. The foam backing material shall not restrict the movement of the L

45、-shaped pivoted support elements.5.4 SeparatorsSeparators of appropriate dimensions shall be used to hold the test specimens in extension up to the maximum specified movement amplitude of the sealant. ISO 2014 All rights reserved 3BS ISO 11617:2014ISO 11617:2014(E)5.5 ContainerContainer filled with

46、demineralised or distilled water shall be used for conditioning according to method B.5.6 Ventilated convection-type ovenVentilated convection-type oven, capable of being maintained at (70 2) C, shall be used for conditioning according to method B.5.7 Fully automated test chamber with an artificial

47、light sourceFully automated test chamber with an artificial light source (5.8), shall be used, capable of exposing the test specimens to radiation under controlled conditions of temperature, relative humidity, and water, complying with the requirements of ISO 4892, Parts 1, 2, 3, and 4. The radiatio

48、n is always directed towards the same surface of the sealant specimen. Standard practices for operating such accelerated weathering chambers are described in ISO 4892-1.The level of irradiance and water exposure at the specimen surface as described in 5.8 and 8.2 cannot be altered.In fully automated

49、 test equipment, exposure to water for this test method is accomplished by water spraying the specimen surface or immersing the test specimens in water.1),2)Contamination of the water is to be avoided. The purity of the water to be used is described in ISO 4892-1. The water temperatures are typically (21 5) C for the spray water and typically (40 5) C for the re-circulated immersion water.3)Suitable equipment and test procedures for cyclic exposures to