1、 Reference number ISO 29769:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 29769 First edition 2008-11-01 Thermal insulating products for building applications Determination of behaviour under point load Produits isolants thermiques destins aux applications du btiment Dtermination du comportement sous c
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5、 at the address 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 fro
6、m either ISO 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 29769:2008(E)
7、 ISO 2008 All 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 6 9 Accuracy of measurement. 6 10 Test report . 7 Annex
8、 A (normative) Modifications to the general test method for cellular glass products . 8 ISO 29769:2008(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
9、 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-governmental, in liais
10、on with ISO, also take part in 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 te
11、chnical committees is to prepare 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 dr
12、awn 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. ISO 29769 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the built environmen
13、t, Subcommittee SC 1, Test and measurement methods. ISO 29769:2008(E) ISO 2008 All rights reserved v Introduction This International Standard comprises the original EN 12430:1998 and its Amendment 1:2006 prepared by Technical Committee CEN/TC 88, Thermal insulating materials and products, which has
14、been amended by ISO/TC 163/SC 1 with reference to conditioning 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
15、the following group of interrelated documents. International 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 IS
16、O 29467, Thermal insulating products for building applications 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
17、EN 826 ISO 29470, Thermal insulating products for building 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 (23 C/50 % relative humidity) EN 1
18、603 ISO 29472, Thermal insulating products for building applications 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 t
19、emperature conditions EN 1605 ISO 29765, Thermal insulating 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, Ther
20、mal insulating products for building applications Determination of short- term water absorption by partial immersion EN 1609 ISO 29769:2008(E) vi ISO 2008 All rights reservedISO 29768, Thermal insulating products for building applications Determination of linear dimensions of test specimens EN 12085
21、 ISO 29769, Thermal insulating products for building applications Determination of behaviour under point load EN 12430 ISO 29770, Thermal insulating products for building applications Determination of thickness for floating-floor insulating products EN 12431 ISO 29771, Thermal insulating materials f
22、or building applications Determination of organic content 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 applicat
23、ions Determination of the tensile bond strength of the adhesive 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 29769
24、:2008(E) ISO 2008 All rights reserved 1 Thermal insulating products for building applications Determination of behaviour under point load 1 Scope This International Standard specifies equipment and procedures for determining the behaviour of products under a force applied to a small area of a test s
25、pecimen at a given speed. This International Standard is applicable to thermal insulating products. This International Standard can be used to determine whether the products have sufficient strength to withstand the forces applied directly to them either during installation or during application, ma
26、inly caused by pedestrian traffic. NOTE The test methods given in the main body of this International Standard and in Annex A are reported and interpreted in different ways. The similarities that exist between the methods are not sufficient to permit reasonable comparisons to be made. 2 Normative re
27、ferences 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 products f
28、or 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 For
29、the purposes of this document, the following terms and definitions apply. 3.1 point load compressive force applied to a test specimen by a circular indenter with a circular cross section of 50 cm 2 , equivalent to a diameter of 79,8 mm 3.2 critical point point on the force-deformation curve where a
30、straight line, forming a tangent to the curve, separates from the curve see Figure 4 a) ISO 29769:2008(E) 2 ISO 2008 All rights reserved4 Principle A point load is applied with an indenter at a given speed in an axial direction perpendicular to the major faces of a squarely cut square test specimen
31、and the compressive force at the critical point and/or the force for a given deformation is calculated. 5 Apparatus 5.1 Compression-testing machine, appropriate to the range of force and displacement involved and having one rigid, polished, fixed or vertically movable square or circular plane plate,
32、 the length of one side (or the diameter) of which is at least as large as the length (or the diagonal length) of the test specimen (see Figure 1). Key 1 connection to the testing machine 2 indenter 3 test specimen 4 supporting plate Figure 1 Test set-up 5.2 Cylindrical indenter, steel, with a diame
33、ter of (79,8 0,1) mm, connected to a vertically movable or fixed support. If appropriate, the indenter shall be connected to the compression machine through a centrally positioned ball joint to ensure that only an axial force is applied to the relevant area of the test specimen. The indenter or the
34、supporting plate shall be capable of moving at a constant speed in accordance with 7.2 (see Figures 2 and 3). ISO 29769:2008(E) ISO 2008 All rights reserved 3 Dimensions in millimetres Key 1 cylindrical indenter 2 test specimen Figure 2 Test specimen Dimensions in millimetres Figure 3 Cylindrical in
35、denter ISO 29769:2008(E) 4 ISO 2008 All rights reserved5.3 Displacement-measuring device, capable of a continuous measurement of the displacement of the indenter or the movable plate, permitting a reading to 5 % or 0,1 mm, whichever is the smaller (see 5.1.1). 5.4 Force-measuring sensor, fitted to t
36、he machine plate or the indenter, to measure the force produced by the reaction of the test specimen upon the plate and the indenter. This sensor shall be such that either its own deformation during the course of the measuring operation is negligible compared with that being measured or its deformat
37、ion shall be taken into account by calculation. In addition, it shall allow the continuous measurement of the force, permitting a reading to 1 %. 5.5 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). 6
38、 Test specimens 6.1 Dimensions of test specimens Test specimens shall maintain the original product thickness. Any skins, facings, and/or coatings shall be retained. The test specimens shall be squarely cut and square with sides having dimensions of 300 mm 300 mm. Other dimensions may be specified i
39、n the relevant product standard or any other international or European technical specification or may be agreed between parties. The linear dimensions shall be determined in accordance with ISO 29768, to the nearest millimetre. The tolerance on parallelism and flatness between the two major faces of
40、 the test specimens shall not be greater than 0,5 % of the test specimen side with a maximum of 0,5 mm. 6.2 Number of test specimens The number of test specimens shall be as specified in the relevant product standard. If the number is not specified, then at least three test specimens shall be used.
41、In the absence of a product standard or any other international or European technical specification, the number of test specimens may be agreed between parties. 6.3 Preparation of test specimens Test specimens shall be cut so that the specimen base is normal to the direction of compression of the pr
42、oduct in its application. The test specimens shall be cut and prepared by methods that do not change the original structure of the product. Moulded skins that do not remain with the product in use shall be removed. Rectangular test specimens with parallel major faces shall be cut from the product so
43、 that the test specimen base is normal to the direction of the force that is experienced in its application. 6.4 Conditioning of test specimens The test 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
44、 time specified in the relevant product standard. 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 in the test report. ISO 29769:2008(E) ISO 2008 All rights reserved 5 7 Procedure 7.1 Te
45、st conditions The test 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 c
46、learly in the test report. 7.2 Test procedure Measure the linear dimensions to the nearest millimetre in accordance with ISO 29768. Place the test specimen in the compression testing machine on the fixed plate so that the indenter is centrally located above the test specimen (see Figure 1). Preload
47、with a force of (2,5 0,25) N corresponding to a pressure of (500 50) Pa. Compress the area of the test specimen under the indenter with the indenter set to move at a constant speed of (50 5) mm/min and record the force-deformation curve. The test shall be stopped when the critical point can be deter
48、mined see Figure 4 a) and/or when the deformation reaches 20 % see Figure 4 b). a) b) Key X deformation Y compressive force F pcompressive force at the critical point F 0force corresponding to the preload Fpdeformation at F pFigure 4 Examples of force-deformation curves ISO 29769:2008(E) 6 ISO 2008
49、All rights reserved8 Calculation and expression of results 8.1 General The result is the mean value of the measurements that shall be expressed to two significant figures. Results should not be extrapolated to other thicknesses. The results for any given thickness shall be expressed as described in 8.2 to 8.4. 8.2 Compressive force/deformation at the critical point F pis the compressive force at the critical point for the test specimen, expr
