BS ISO 19862-2015 Buildings and civil engineering works Sealants Durability to extension compression cycling under accelerated weathering《建筑和土木工程 密封剂 加速风化条件下扩展压缩循环的耐久性》.pdf

1、BSI Standards PublicationBS ISO 19862:2015Buildings and civil engineeringworks Sealants Durabilityto extension compressioncycling under acceleratedweatheringBS ISO 19862:2015 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 19862:2015.The UK participation in its

2、 preparation was entrusted to Technical Committee B/547, Sealants for building and construction.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are respons

3、ible for its correct application. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 88089 6 ICS 91.100.50 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standar

4、ds Policy and Strategy Committee on 30 November 2015.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS ISO 19862:2015 ISO 2015Buildings and civil engineering works Sealants Durability to extension compression cycling under accelerated weatheringBtiments et ouvrages de gnie

5、 civil Mastics Durabilit un cycle dextension-compression dans des conditions de vieillissement acclrINTERNATIONAL STANDARDISO19862First edition2015-11-01Reference numberISO 19862:2015(E)BS ISO 19862:2015ISO 19862:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015, Published

6、in SwitzerlandAll rights reserved. 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 ca

7、n be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCh. de Blandonnet 8 CP 401CH-1214 Vernier, Geneva, SwitzerlandTel. +41 22 749 01 11Fax +41 22 749 09 47copyrightiso.orgwww.iso.orgBS ISO 19862:2015ISO 19862:2015(E)Foreword iv1

8、 Scope . 12 Normative reference . 13 Terms and definitions . 14 Principle 15 Apparatus . 26 Preparation of test specimens 47 Conditioning of test specimens . 57.1 General . 57.2 Method A 57.3 Method B 58 Test procedure 58.1 General . 58.2 Test Procedure. 59 Evaluation and expression of results 610 T

9、est report . 6Bibliography 8 ISO 2015 All rights reserved iiiContents PageBS ISO 19862:2015ISO 19862:2015(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is no

10、rmally 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-governmental, in liaison with ISO, also take part in

11、 the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.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 t

12、he different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with 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 docu

13、ment may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any 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.or

14、g/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.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 pr

15、inciples in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 59, Buildings and civil engineering works, Subcommittee SC 8, Sealants.iv ISO 2015 All rights reservedBS ISO 19862:2015INTERNATIONAL STAN

16、DARD ISO 19862:2015(E)Buildings and civil engineering works Sealants Durability to extension compression cycling under accelerated weathering1 ScopeThis International Standard specifies a method for the determination of classification of durability of sealants used in exterior joints in building con

17、struction.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 referenced document (including a

18、ny amendments) applies.ISO 4892-11), Plastics Methods of Exposure to Laboratory Light Sources Part 1: General GuidanceISO 4892-2:2013, Plastics Methods of exposure to laboratory light sources Part 2: Xenon-arc lampsISO 4892-32), Plastics Methods of exposure to laboratory light sources Part 3: Fluore

19、scent UV lampsISO 4892-4, Plastics Methods of exposure to laboratory light sources Part 4: Open-flame carbon-arc lampsISO 6927, Buildings and civil engineering works Sealants VocabularyISO 13640, Building construction Jointing products Specifications for test substrates3 Terms and definitionsFor the

20、 purposes of this document, the terms and definitions given in ISO 6927 apply.4 PrincipleTest specimens are prepared such that the sealant to be tested adheres to two parallel contact surfaces. The cured and conditioned test specimens are compressed to a defined width and this compression is maintai

21、ned under accelerated weathering conditions. The test specimens are then extended to a defined width and this extension is maintained under accelerated weathering conditions. The samples are evaluated to record any loss of adhesion or cohesion is recorded along with recording if light can be visible

22、 through the specimen.1) To be published. (Revision of ISO 4892-1:1999)2) To be published. (Revision of ISO 4892-3:2013) ISO 2015 All rights reserved 1BS ISO 19862:2015ISO 19862:2015(E)5 Apparatus5.1 Substrate materials, for the preparation of test specimens as defined in ISO 13640. The substrate ma

23、terials shall be selected from mortar type 1 or type 2. 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 Figure 1. Test substrates of other dimensions

24、 may be used, but then the dimensions of the sealant bead and the area of adhesion shall be the same as those shown in Figure 1.5.2 Spacers, cross section (12 mm 12 mm) with anti-adherent surface. For the preparation of test specimens see Figure 1.Dimensions in millimetresKey1 mortar substrates2 sea

25、lant3 spacerFigure 1 Test specimen with mortar substrates5.3 Anti-adherent substrate, for the preparation of the test specimens, e.g. polyethylene (PE) film, according to the advice of the sealant manufacturer. (See ISO 8339, 5.3).5.4 Tensile test machine, with recording device, capable of extending

26、 the test specimens at a rate of (5,5 0,7) mm/min.5.5 Ventilated convection-type oven, capable of being maintained at (70 2) C for conditioning according to method B (see 7.3).2 ISO 2015 All rights reservedBS ISO 19862:2015ISO 19862:2015(E)5.6 Container, for immersing test specimens in distilled wat

27、er for conditioning according to method B (see 7.3).5.7 Separators and clamps, with appropriate dimensions to hold the test specimens extended or compressed to 12,5%, 20%, or 25 % of the original width or any other width agreed between the parties concerned.5.8 Measuring device, accuracy to 0,5 mm.5

28、9 Light device, capable of shining light on the back surface of the specimen.5.10 Fully automated artificial weathering test chamber with an artificial light source, fully automated test chamber with an artificial light source (see 5.11), shall be used, capable of exposing the test specimens to rad

29、iation under controlled conditions of temperature, relative humidity, and water, complying with the requirements of ISO 4892-1, ISO 4892-2, ISO 4892-3, and ISO 4892-4. The radiation is always directed towards the same surface of the sealant specimen. Standard practices for operating such accelerated

30、 weathering chambers are described in ISO 4892-1.The level of irradiance and water exposure at the specimen surface may not be altered.In fully automated test equipment, exposure to water for this test method is accomplished by water spraying the specimen surface or immersing the test specimens in w

31、ater (see Note 1 and Note 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 (see Note 3).Suitable equipment and

32、 test procedures for cyclic exposures to water are described in ISO 4892-1, ISO 4892-2, ISO 4892-3, and ISO 4892-4. Water is a key factor contributing to the ageing of sealants, especially in combination with exposure to light. In xenon arc devices that use water spray for wetting, relative humidity

33、 during the light period shall be maintained at (50 10) % RH, (see ISO 4892-2:2013, Table 3, Method A, Cycle Number 1) (see Note 4).In the immersion technique, the test specimens are placed in a chamber that is periodically flooded with re-circulated water. During immersion, the specimens are comple

34、tely covered by water. The water temperature is measured below the water surface with the black standard thermometer. The immersion spray water can be at a higher temperature. The uncontrolled temperature of the re-circulated immersion water during operation of the weathering device is typically (40

35、 5) C. It can be controlled by heating the water to a higher temperature. However, heating is not desirable because the water immersion temperature would then differ to a larger extent from the spray water temperature.NOTE 1 Adequate heat transfer between the test specimen and the environment is ess

36、ential during the lower temperature period in the fluorescent UV/condensation device in order for condensation on the sealant to occur. This places restrictions on the thermal mass and, consequently, on the dimensions of a specimen. No experimental data have been generated on the time-of-wetness of

37、sealant test specimens of the kind specified in this International Standard when placed in fluorescent UV/condensation device operating at conditions specified in this International Standard. However, testing conducted by ASTM C24 on ISO 8339 specimens appears to suggest that the condensation proces

38、s provided in the fluorescent UV/condensation apparatus is generally not applicable to the type of sealant specimens tested. Therefore, wetting in this International Standard is carried out by water spray on the exposed specimen surface (default method). However, the front surface water spray access

39、ory was not designed for this purpose and requires an unreasonable amount of pure water for the wet period specified. Therefore, often the equipment is modified to allow re-circulation of the water during the exposure period. Some fluorescent UV equipment have adaptable spray manifolds, which allow

40、installation of lower flow type nozzles, thus reducing the amount of pure water used.NOTE 2 Data generated with these two methods of water exposure (spray or immersion) in a round robin test on a set of sealants for revision of ISO 11431 showed acceptable correlation, although contributions to the v

41、arious degradation mechanisms acting in the specimens (e.g. hydrolysis, thermal shock, leaching of formulation components, et cetera) can differ between these exposures. The degree of correlation between these two methods thus may vary depending on the specific sealant tested. ISO 2015 All rights re

42、served 3BS ISO 19862:2015ISO 19862:2015(E)NOTE 3 Spray water can be fresh or re-circulated from a holding tank. Immersion water is generally in a holding tank for re-circulation. The temperature of the spray water is uncontrolled and for fresh water is typically (21 5) C. Re-circulated water should

43、maintain a temperature of (40 5) C.NOTE 4 Generally, automated weathering equipment based on xenon-arc light with water immersion exposure and fluorescent UV lamp type equipment do not allow control of humidity during the light period.5.11 Artificial light source, for the simulation of the global ra

44、diation at the surface of the earth are subject to development. The degree of approximation to the spectral power distribution according to CIE publication No. 85,Table 4 depends on the type of lamp. Xenon-arc lamps with suitable filters are preferred and are considered the default for the purpose o

45、f this International Standard.Several factors can change the intensity and the spectral power distribution of the artificial light source during service. Comply with the manufacturers recommendations and the requirements of ISO 4892 (all parts) to maintain constant irradiation conditions.5.11.1 Xeno

46、n-arc light source (default), Xenon-arc light source with daylight filters, shall be used for the simulation of terrestrial daylight as defined in the CIE publication No. 85. The spectral power distribution of the radiation shall comply with the requirements outlined in ISO 4892-2, Method A. Irradia

47、nce at the surface of the test specimens between the wavelengths of 300 nm and 800 nm shall be set at 550 W/m2and maintained at 75 W/m2. The equivalent irradiance setting for (300 to 400) nm shall be 60 W/m2maintained at 2 W/m2and the setting for 340 nm shall be 0,51 W/ (m2. nm) maintained at 0,02 W

48、/ (m2. nm). If, exceptionally, other intensities will be used, these shall be stated in the test report. Irradiance below 300 nm shall not exceed 1 W/m2. The irradiance shall not vary by more than 10% over the whole specimen exposure area.5.11.2 Fluorescent ultraviolet source (option), fluorescent U

49、VA-340 lamp(s), shall be used. The radiation of UVA-340 lamp(s) is mainly in the ultraviolet region between 300 and 360 nm with negligible visible and infrared radiation. The spectral power distribution of the radiation shall comply with the requirements outlined in ISO 4892-3 for a lamp with 343 nm peak emission. Irradiance below 300 nm shall not exceed 1W/m2. The irradiance shall not vary by more than 10% over the whole specimen exposure area.5.11.3 Open-flame carbon arc source (opti