ISO 29472-2008 Thermal insulating products for building applications - Determination of dimensional stability under specified temperature and humidity condition.pdf

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1、 Reference number ISO 29472:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 29472 First edition 2008-11-01 Thermal insulating products for building applications Determination of dimensional stability under specified temperature and humidity conditions Produits isolants thermiques destins aux applications

2、 du btiment Dtermination de la stabilit dimensionnelle dans des conditions de temprature et dhumidit spcifies ISO 29472:2008(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 t

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7、org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedISO 29472:2008(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 . 2 7 Procedure 2 8

8、Calculation and expression of results 4 9 Accuracy of measurement. 5 10 Test report . 5 ISO 29472:2008(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 29472 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 29472:2008(E) ISO 2008 All rights reserved v Introduction This International Standard comprises the original EN 1604:1996 and EN 1604:1996/AC:1997 prepared by Technical Committee CEN/TC 88, Thermal insulating materials and products, which have

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 (23C/50 % relative humidity) EN 16

18、03 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 te

19、mperature 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, Therm

20、al insulating products for building applications Determination 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 29472:2008(E) vi ISO 2008 All rights reserved

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 fo

22、r 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 applicati

23、ons 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 29472:

24、2008(E) ISO 2008 All rights reserved 1 Thermal insulating products for building applications Determination of dimensional stability under specified temperature and humidity conditions 1 Scope This International Standard specifies the equipment and procedures for evaluating dimensional changes of spe

25、cimens under specified conditions of temperature, relative humidity and duration of exposure. This International Standard proposes a range of conditions from which one or more desirable test conditions can be selected. This International Standard is applicable to thermal insulating products. 2 Norma

26、tive 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 pro

27、ducts 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 definitio

28、ns For the purposes of this document, the following terms and definitions apply. 3.1 length l dimension of the specimen parallel to the longer linear dimension of the major surface of the original product 3.2 width b linear dimension of the major surface of the specimen, measured at right angles to

29、the length 3.3 thickness d linear dimension measured perpendicularly to the length and width plane 4 Principle A determination is made of the changes in linear dimensions that occur when the specimens are conditioned, subjected to specified environments for a given period, and then reconditioned. IS

30、O 29472:2008(E) 2 ISO 2008 All rights reserved5 Apparatus 5.1 Temperature-controlled or temperature- and humidity-controlled chamber, capable of maintaining the specimens within the specified conditions and within the limits specified in 7.2. 5.2 Measuring instruments, capable of measuring linear di

31、mensions of specimens in accordance with ISO 29768, to an accuracy of 0,1 mm. 6 Test specimens 6.1 Dimensions of test specimens The thickness of specimens shall be equal to the original product thickness. The specimens shall be squarely cut and have a side length of (200 1) mm. If larger dimensions

32、are used, the accuracy shall be as given in 5.2. 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 three specimens shall be tested for each set of chosen conditions. In the absence of a product s

33、tandard 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 so that they are representative of the full size product. Any surface skins, facings and/or coatings shall be re

34、tained. Length and width directions shall be marked on the specimens. 6.4 Conditioning of test specimens The specimens shall be conditioned to equilibrium with an atmosphere at (23 2) C and (50 5) % relative humidity. A specimen is considered to be conditioned when changes in length and in width, me

35、asured according to 7.2, between two consecutive measurements at a time interval of two weeks, are less than 0,1 %. Other time intervals may be defined in the relevant product standard or any other international or European technical specification. In tropical countries, different conditioning and t

36、esting 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 Procedure 7.1 Test conditions Condition the specimens in accordance with 6.4. ISO 29472:2008(E) ISO 2008 All rights reserved 3 7.2 Test procedure 7.2.1 In the same at

37、mosphere as used for conditioning, determine the initial length and width of each specimen (l 0and b 0 , respectively) by taking readings at three positions (l 01 , l 02 ,l 03 and b 01 , b 02 ,b 03 , respectively)and the initial thickness (d 0 ) at five positions (d 01 , d 02 ,d 03 ,d 04 ,d 05 ) as

38、shown in Figure 1, using the appropriate methods described in ISO 29768, to an accuracy of 0,1 mm. Dimensions in millimetres aThe subscript indicates the number of the reading, e.g., d 1stands for d 01 and d t1 . Figure 1 Positions for measuring dimensions 7.2.2 Expose a set of specimens to each of

39、the conditions specified in the relevant product standard. 7.2.3 In the absence of such a specification, test conditions may be agreed between parties, chosen from 7.2.3.1 and 7.2.3.2. Other conditions may be used. 7.2.3.1 For a specified temperature without a specified relative humidity: ( 40 3) C;

40、 ( 30 3) C; ( +40 2) C; ( +60 2) C. ISO 29472:2008(E) 4 ISO 2008 All rights reserved7.2.3.2 For a specified temperature with a relative humidity specified in the range 30 % to 90 %, to an accuracy of 5 % relative humidity: ( +20 2) 0 0; ( +23 2) C; ( +60 2) C; ( +70 2) C. 7.2.4 Lay the specimens hor

41、izontally or place them vertically in the test chamber, not less than 25 mm apart, on rigid wire mesh or perforated metal plate such that substantially free air circulation occurs around the specimens. The specimens shall not be exposed to direct radiation from any heating elements. The preferred du

42、ration of exposure is (24 1) h or (48 1) h. Other exposure times may be as specified in the relevant product standard or any other international or European technical specification or may be agreed between parties. 7.2.5 Remove the specimens after exposure to the test atmosphere and expose them for

43、a further (3 1) h at (23 2) C and (50 5) % relative humidity. 7.2.6 Determine the final length, width, and thickness of the specimens (l tand b tand d t , respectively) by taking readings (l t1 ,l t2 , l t3and b t1 ,b t2 , b t3and d t1 ,d t2 , d t3 , d t4 , d t5 , respectively)at the same positions

44、as for the initial measurements (see Figure 1). 7.2.7 Examine the specimens visually. If requested in the relevant product standard or any other international or European technical specification, the specimens may be re-exposed to the test conditions for periods of 7 days and the dimensions re-deter

45、mined at the positions shown in Figure 1, at the end of the requested periods. 8 Calculation and expression of results Calculate the dimensional changes, 1 , band d , expressed as percentages, from the individual measurements, using the Equations (1) to (3): t0 1 0 100 ll l = (1) t0 b 0 100 bb b = (

46、2) t0 d 0 100 dd d = (3) where l 0 , b 0and d 0are the initial dimensions after conditioning, expressed in millimetres; l t , b tand d tare the final dimensions after exposure, expressed in millimetres (mm). ISO 29472:2008(E) ISO 2008 All rights reserved 5 Calculate the mean values of each dimension

47、al change, 1 , band d , from the individual test results. The dimensional changes, 1 , band d , shall be given to the nearest 0,1 %. 9 Accuracy of measurement An interlaboratory test was performed with nine laboratories. Three products were tested. The results, analysed in accordance with ISO 5725-2

48、, are given in Table 1. Table 1 Dimensional stability under specified conditions Relative change in dimensions % Range of measured Estimate of repeatability variance 95 % repeatability limit Estimate of reproducibility variance 95 % reproducibility limit Test conditions I , b , dS rS RSpecified temp

49、erature 1,0 to 2,1 0,1 0,4 0,2 0,7 Specified temperature and relative humidity 0,7 to 2,5 0,2 0,6 0,3 1,0 All values given in Table 1 are expressed in percentage of the test specimen dimension. The above mentioned terms are applied as described in ISO 5725-2. Bias cannot be determined in this test method as there is not any accepted reference material for