1、 Reference number ISO 29765:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 29765 First edition 2008-11-01 Thermal insulating products for building applications Determination of tensile strength perpendicular to faces Produits isolants thermiques destins aux applications du btiment Dtermination de la rsi
2、stance la traction perpendiculairement aux faces ISO 29765:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed
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5、e inform the Central Secretariat 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, w
6、ithout permission in writing from 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
7、rights reservedISO 29765:2008(E) 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. 1 5 Apparatus 2 6 Test specimens . 3 7 Procedure 4 8 Calculation and expression of results 4 9 Accuracy of measure
8、ment. 4 10 Test report . 5 ISO 29765:2008(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 normally carried out through ISO
9、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 the work. ISO collaborates clo
10、sely 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 prepare International Standards. Dra
11、ft 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 some of the elements of this docu
12、ment may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 29765 was prepared by Technical Committee ISO/TC 163, Thermal performance and energy use in the built environment, Subcommittee SC 1, Test and measurement methods. ISO 29765
13、:2008(E) ISO 2008 All rights reserved v Introduction This International Standard comprises the original EN 1607:1996 and EN 1607:1996/AC:1997 prepared by Technical Committee CEN/TC 88, Thermal insulating materials and products, which have been amended by ISO/TC 163/SC 1 with reference to conditionin
14、g 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. International
15、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 application
16、s 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 building ap
17、plications 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 1603 ISO 29472, Thermal insulating products for building appli
18、cations 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 insulating p
19、roducts 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 Determinati
20、on of short- term water absorption by partial immersion EN 1609 ISO 29765:2008(E) vi ISO 2008 All rights reservedISO 29768, Thermal insulating products for building applications Determination of linear dimensions of test specimens EN 12085 ISO 29769, Thermal insulating products for building applicat
21、ions 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 for building applications Determination of organic content EN
22、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 adhesi
23、ve 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 29765:2008(E) ISO 2008 All rights reserved 1 Thermal insulating pr
24、oducts for building applications Determination of tensile strength perpendicular to faces 1 Scope This International Standard specifies the equipment and procedures for determining the tensile strength of a product perpendicular to its faces. This International Standard is applicable to thermal insu
25、lating products. 2 Normative 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
26、, Thermal insulating products for building applications Determination of linear dimensions of test specimens ISO 5725-1:1994, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions ISO 5725-2:1994, Accuracy (trueness and precision) of measurem
27、ent methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method 3 Terms and definitions For the purposes of this document, the following term and definition apply. 3.1 tensile strength perpendicular to faces mtmaximum recorded
28、tensile force perpendicular to the product faces during the pulling operation, divided by the cross-sectional area of the test specimen 4 Principle A specimen is attached between two rigid plates or blocks, fastened in a tensile testing machine and pulled apart at a given speed. The maximum tensile
29、force is recorded and the tensile strength of the specimen is calculated. ISO 29765:2008(E) 2 ISO 2008 All rights reserved5 Apparatus Any test equipment that provides the same result with at least the same accuracy may be used. 5.1 Tensile testing machine, appropriate for the range of force and disp
30、lacement involved, capable of having a constant crosshead speed adjusted to (10 1) mm/min and capable of measuring the force to an accuracy of 1 %. 5.2 Rigid plates or blocks, with self-aligning attachment to avoid uneven distribution of tensile stress during the test. Examples of suitable arrangeme
31、nts to bond the specimen are shown in Figure 1. a) b) Key 1 bolt 2 connecting shaft 3 metal blocks 4 adhesive 5 test specimen Key 1 rigid plate 2 adhesive 3 test specimen Figure 1 Examples of suitable arrangements to bond the specimen 5.3 Adhesive, used to bond the specimen between the rigid plates
32、or blocks, with a consideration of the following. The adhesive shall not reinforce or damage the surface layers of the product. Hot adhesives shall be avoided if they damage the product. Any solvent used shall be compatible with the product. ISO 29765:2008(E) ISO 2008 All rights reserved 3 6 Test sp
33、ecimens 6.1 Dimensions of test specimens The thickness of specimens shall be equal to the original product thickness including any skins, facings and/or coatings. The specimens shall be prisms of square cross section having sides of the following recommended dimensions: 50 mm 50 mm; or 100 mm 100 mm
34、; or 150 mm 150 mm; or 200 mm 200 mm; or 300 mm 300 mm. Dimensions used shall be as specified in the relevant product standard. In the absence of a product standard or any other international or European technical specification, the dimensions of specimens may be agreed between parties. The linear d
35、imensions shall be determined in accordance with ISO 29768 to an accuracy of 0,5 %. 6.2 Number of test specimens The number of specimens shall be as specified in the relevant product standard. If the number is not specified, then at least five specimens shall be used. In the absence of a product sta
36、ndard or any other international or European technical specification, the number of specimens may be agreed between parties. 6.3 Preparation of test specimens The specimens shall be cut from the product so that the specimen base is normal to the direction of the tensile force applied to the product
37、in use. Specimens shall be prepared by methods that do not change the original structure of the product. Any skins, facings and/or coatings shall be retained. The specimens shall be representative of the product and preferably not taken closer than 15 mm from the edges of the product to avoid the in
38、fluence of any handling damage. For products with non-plane or non-parallel faces, or that have skins, facings and/or coatings, preparation of specimens shall be as specified in the relevant product standard. The tolerance on parallelism and flatness between the two faces of a specimen shall be not
39、more than 0,5 % of the specimen side length, with a maximum of 0,5 mm. Before conditioning, the specimens shall be attached to the two rigid plates or blocks using a suitable adhesive. 6.4 Conditioning of test specimens The specimens (including the two rigid plates or blocks) shall be conditioned fo
40、r at least 6 h at (23 5) C. In case of dispute, they shall be conditioned at (23 2) C and (50 5) % relative humidity for the time specified in the relevant product standard. Other conditions may be used, provided that they give the same results. In tropical countries, different conditioning and test
41、ing 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 29765:2008(E) 4 ISO 2008 All rights reserved7 Procedure 7.1 Test conditions Testing shall be carried out at (23 5) C. In cases of dispute, testing shall be carried out
42、 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 in the test report. 7.2 Test procedure Determine the cross-sectional area of the specimens i
43、n accordance with ISO 29768. Carry out this determination preferably before the specimen is attached to the two rigid plates or blocks. Attach the specimen in the tensile testing machine by means of the plate/block fixings and increase the tensile force at a constant speed of the crosshead (see 5.1)
44、 until failure occurs. Record the maximum force in kilonewtons. Record the way in which the material or the skin, facing and/or coating, fails. Discard any specimen showing total or partial failure in the adhesive layer between the specimen and the rigid plates or blocks. 8 Calculation and expressio
45、n of results Calculate the tensile strength, mt , expressed in kilopascals, perpendicular to faces, using Equation (1): mm mt F F A lb = (1) where F mis the maximum tensile force recorded, expressed in kilonewtons; A is the cross-sectional area of the specimen, expressed in square metres; l, b are l
46、ength and width of the specimen, respectively, expressed in metres. The result shall be expressed as the mean value of the measured values, to two significant figures. NOTE The test results obtained with specimens of different dimensions can be different. 9 Accuracy of measurement Following the expe
47、rience from a “round robin test”, where comparable test equipment and specimen preparation were used, the precision for tensile strength, mt , perpendicular to faces can be estimated as given below: 95 % repeatability limit: approximately 5 %; 95 % reproducibility limit: approximately 15 %. The abov
48、e-mentioned terms are applied in accordance with ISO 5725-1 and ISO 5725-2. ISO 29765:2008(E) ISO 2008 All rights reserved 5 10 Test report The test report shall include the following information: a) reference to this International Standard; b) product identification: 1) product name, factory, manuf
49、acturer, or supplier, 2) production code number, 3) type of product, 4) packaging, 5) form in which the product arrived at the laboratory, 6) other information as appropriate (e.g. nominal thickness, nominal density); c) test procedure: 1) pre-test history and sampling (e.g. person taking the sample, place of sampling), 2) conditioning, 3) any deviation from Clauses 6 and 7, 4) conditioning and testing conditions in tropical
