1、 Reference number ISO 29469:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 29469 First edition 2008-11-01 Thermal insulating products for building applications Determination of compression behaviour Produits isolants thermiques destins aux applications du btiment Dtermination du comportement en compress
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5、ss given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO
6、at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedISO 29469:2008(E) ISO 2008 All
7、 rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle. 2 5 Apparatus 2 6 Test specimens . 4 7 Procedure 5 8 Calculation and expression of results 5 9 Accuracy 7 10 Test report . 8 Annex A (normative) Modifications
8、to the general test method for cellular glass products . 9 ISO 29469:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is n
9、ormally 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 i
10、n the work. ISO collaborates closely with the International Electrotechnical Commission (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 prep
11、are International Standards. Draft International Standards adopted by the technical 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 s
12、ome 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. ISO 29469 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 1, Test an
13、d measurement methods. ISO 29469:2008(E) ISO 2008 All rights reserved v Introduction This International Standard comprises the original EN 826:1996 prepared by Technical Committee CEN/TC 88, Thermal insulating materials and products, which has been amended by ISO/TC 163/SC 1 with reference to condit
14、ioning and testing conditions in tropical countries. This International Standard is one of a series of documents specifying test methods, based on existing European Standards, that are being adopted by ISO. This “package” of standards includes the following group of interrelated documents. Internati
15、onal Standard Respective EN standard ISO 29465, Thermal insulating products for building applications Determination of length and width EN 822 ISO 29466, Thermal insulating products for building applications Determination of thickness EN 823 ISO 29467, Thermal insulating products for building applic
16、ations Determination of squareness EN 824 ISO 29468, Thermal insulating products for building applications Determination of flatness EN 825 ISO 29469, Thermal insulating products for building applications Determination of compression behaviour EN 826 ISO 29470, Thermal insulating products for buildi
17、ng applications Determination of the apparent density EN 1602 ISO 29471, Thermal insulating products for building applications Determination of dimensional stability under constant normal laboratory conditions (23C/50 % relative humidity) EN 1603 ISO 29472, Thermal insulating products for building a
18、pplications Determination of dimensional stability under specified temperature and humidity conditions EN 1604 ISO 29764, Thermal insulating products for building applications Determination of deformation under specified compressive load and temperature conditions EN 1605 ISO 29765, Thermal insulati
19、ng products for building applications Determination of tensile strength perpendicular to faces EN 1607 ISO 29766, Thermal insulating products for building applications Determination of tensile strength parallel to faces EN 1608 ISO 29767, Thermal insulating products for building applications Determi
20、nation of short- term water absorption by partial immersion EN 1609 ISO 29768, Thermal insulating products for building applications Determination of linear dimensions of test specimens EN 12085 ISO 29769, Thermal insulating products for building applications Determination of behaviour under point l
21、oad EN 12430 ISO 29469:2008(E) vi ISO 2008 All rights reservedISO 29770, Thermal insulating products for building applications Determination of thickness for floating-floor insulating products EN 12431 ISO 29771, Thermal insulating materials for building applications Determination of organic content
22、 EN 13820 ISO 29803, Thermal insulation products for building applications Determination of the resistance to impact of external thermal insulation composite systems (ETICS) EN 13497 ISO 29804, Thermal insulation products for building applications Determination of the tensile bond strength of the ad
23、hesive and of the base coat to the thermal insulation material EN 13494 ISO 29805, Thermal insulation products for building applications Determination of the mechanical properties of glass fibre meshes EN 13496 INTERNATIONAL STANDARD ISO 29469:2008(E) ISO 2008 All rights reserved 1 Thermal insulatin
24、g products for building applications Determination of compression behaviour 1 Scope This International Standard specifies the equipment and procedures for determining the compression behaviour of specimens. It is applicable to thermal insulating products and can be used to determine the compressive
25、stress in compressive creep tests and for applications in which insulation products are exposed only to short-term loads. The method can be used for quality control purposes and can also be employed to obtain reference values from which design values can be calculated using safety factors. 2 Normati
26、ve 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 (including any amendments) applies. ISO 29768, Thermal insulating produ
27、cts for building applications Determination of linear dimensions of test specimens ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method 3 Terms and definitions
28、 For the purposes of this document, the following terms and definitions apply. 3.1 relative deformation ratio of the reduction in thickness of the test specimen to its initial thickness, d 0 , measured in the direction of loading and expressed as a percentage 3.2 compressive strength mratio of the m
29、aximum compressive force, F m , reached when the strain, , at yield see Figure 1 b) or rupture see Figure 1 a) is less than 10 %, to the initial cross-sectional area of the test specimen 3.3 compressive stress at 10 % strain 10ratio of the compressive force, F 10 ,at 10 % strain, 10 ,to the initial
30、cross-section of the test specimen see Figure 1, c) and d) for products presenting 10 % strain before possible yield or rupture ISO 29469:2008(E) 2 ISO 2008 All rights reserved3.4 compression modulus of elasticity E compressive stress divided by the corresponding strain below the proportional limit,
31、 when the relationship is linear (see Figure 1) 4 Principle A compressive force is applied at a given rate of displacement perpendicular to the major faces of a squarely cut test specimen and the maximum stress supported by the specimen calculated. When the value of the maximum stress corresponds to
32、 a strain of less than 10 %, it is designated as compressive strength and the corresponding strain is reported. If no failure is observed before the 10 % strain has been reached, the compressive stress at 10 % strain is calculated and its value reported as compressive stress at 10 % strain. 5 Appara
33、tus 5.1 Compression testing machine, designed to suit the range of force and displacement involved and having two very rigid, polished, square or circular plane parallel platens with a minimum side length (or diameter) equal to the side length (or diagonal) of the test specimen. One of the platens s
34、hall be fixed and the other shall be movable, with a centrally positioned ball joint to ensure that only axial force is applied to the specimen, if appropriate. The movable platen shall be capable of moving at a constant rate of displacement in accordance with Clause 7. 5.2 Displacement measuring de
35、vice, fitted to the compression testing machine, which allows continuous measurement of the displacement of the movable platen to an accuracy of 5 % or 0,1 mm, whichever is smaller (see 5.3). 5.3 Force measuring device, comprised of a sensor fitted to one of the machine platens to measure the force
36、produced by the reaction of the specimen on the platens. This sensor shall be such that either its own deformation during the measuring operation is negligible compared with that of the object being measured or its own deformation shall be taken into account by calculation. In addition, it shall all
37、ow the continuous measurement of the force to an accuracy of 1 %. 5.4 Recording device, for the simultaneous recording of the force, F, and the displacement, X, which provides a curve of F as a function of X (see 7.2). NOTE The curve gives additional information on the behaviour of the product and p
38、ossibly enables the determination of the compression modulus of elasticity. ISO 29469:2008(E) ISO 2008 All rights reserved 3a) b) c) d) Key X displacement Y force F pforce corresponding to the preload F mmaximum force X mdisplacement at maximum force F 10force at 10 % strain X 10displacement at 10 %
39、 strain F eforce corresponding to X e(conventional proportional limit) X edisplacement in the conventional elastic zone aX mis smaller than 10 %. Figure 1 Examples of force displacement curves ISO 29469:2008(E) 4 ISO 2008 All rights reserved6 Test specimens 6.1 Dimensions of specimens The test speci
40、mens shall have the original product thickness. The width of the specimens shall be not less than their thickness. Products with integrally moulded skins that are retained in use shall be tested with these skins intact. Specimens shall not be layered to produce a greater thickness for testing. Speci
41、mens shall be squarely cut and have the following dimensions: 50 mm 50 mm; or 100 mm 100 mm; or 150 mm 150 mm; or 200 mm 200 mm; or 300 mm 300 mm. The range of dimensions used shall be specified in the relevant product standard. In the absence of a product standard, the specimen dimensions may be ag
42、reed between the parties involved. The linear dimensions shall be determined in accordance with ISO 29768, to an accuracy of 0,5 %. The tolerance on parallelism and flatness between the two faces of the specimen shall be not greater than 0,5 % of the specimen side length or 0,5 mm, whichever is smal
43、ler. If a specimen is not flat, it shall be ground flat or an adequate coating shall be applied to prepare the surface for the test. No significant deformation shall occur in the coating during the test. NOTE The accuracy of the test result is reduced if the specimens have a thickness of less than 2
44、0 mm. 6.2 Specimen preparation Specimens shall be cut so that their base is normal to the direction of compression of the product in its intended use. The specimen shall be cut by methods that do not change the structure relative to that of the original product. The method of selecting the specimens
45、 shall be as specified in the relevant product standard. In the case of tapered products, the parallelism of the two faces of the specimen shall be in accordance with 6.1. In the absence of a product standard, the method of selecting the specimens may be agreed between the parties involved. NOTE Spe
46、cial methods of preparation, when needed, are given in the relevant product standard. In cases where a more complete characterization of anisotropic materials is desired or where the principal direction of anisotropy is unknown, it can be necessary to prepare additional sets of specimens. 6.3 Number
47、 of specimens The number of specimens shall be as specified in the relevant product standard. In the absence of such a specification, either at least five specimens shall be used or the number of specimens may be agreed between the parties involved. ISO 29469:2008(E) ISO 2008 All rights reserved 5 6
48、.4 Conditioning of specimens The specimens shall be stored for at least 6 h at (23 5) C. In case of dispute, they shall be stored at (23 2) C and (50 5) % relative humidity for the time specified in the relevant product standard. In tropical countries, different conditioning and testing conditions c
49、an be relevant. In this case, the conditions shall be 27 C and 65 % RH and be stated clearly in the test report. 7 Procedure 7.1 Test conditions Testing shall be carried out at (23 5) C. In case of dispute, it shall be carried out at (23 2) C and (50 5) % relative humidity. In tropical countries, different conditioning and testing conditions can be relevant. In this case, the conditions shall be 27 C and 65 % RH and be stated clearly
