1、 Reference number ISO 29471:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 29471 First edition 2008-11-01 Thermal insulating products for building applications Determination of dimensional stability under constant normal laboratory conditions (23 C/50 % relative humidity) Produits isolants thermiques de
2、stins aux applications du btiment Dtermination de la stabilit dimensionnelle dans des conditions de laboratoire constantes et normales (23 C/50 % dhumidit relative) ISO 29471:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file ma
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6、eproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without 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
7、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 29471:2008(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
8、. 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 ISO 29471:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national stan
9、dards bodies (ISO member bodies). The work of preparing 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 org
10、anizations, governmental and non-governmental, in liaison 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
11、 in the ISO/IEC Directives, Part 2. The main task of technical 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
12、 % of the member bodies casting a vote. Attention is drawn 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 29471 was prepared by Technical Committee ISO/TC 163, The
13、rmal performance and energy use in the built environment, Subcommittee SC 1, Test and measurement methods. ISO 29471:2008(E) ISO 2008 All rights reserved v Introduction This International Standard comprises the original EN 1603:1996 and EN 1603:1996/AC:1997 prepared by Technical Committee CEN/TC 88,
14、 Thermal insulating materials and products, which have 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 bein
15、g adopted by ISO. This “package” of standards includes 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 bui
16、lding applications Determination of thickness EN 823 ISO 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 buildi
17、ng applications Determination of compression behaviour 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 l
18、aboratory conditions (23C/50 % relative humidity) EN 1603 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
19、 of deformation under specified compressive load and temperature 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 tens
20、ile strength parallel to faces EN 1608 ISO 29767, Thermal insulating products for building applications Determination of short-term water absorption by partial immersion EN 1609 ISO 29471:2008(E) vi ISO 2008 All rights reservedISO 29768, Thermal insulating products for building applications Determin
21、ation of linear dimensions of test specimens EN 12085 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 produc
22、ts EN 12431 ISO 29771, Thermal insulating materials for 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 298
23、04, Thermal insulation products for building applications 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 f
24、ibre meshes EN 13496 INTERNATIONAL STANDARD ISO 29471:2008(E) ISO 2008 All rights reserved 1 Thermal insulating products for building applications Determination of dimensional stability under constant normal laboratory conditions (23 C/50 % relative humidity) 1 Scope This International Standard spec
25、ifies the equipment and procedures to evaluate irreversible dimensional changes of test specimens and full-size products with time under constant normal laboratory conditions. It is applicable to thermal insulating products. 2 Normative references The following referenced documents are indispensable
26、 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 29465, Thermal insulating products for building applications Determination of length and width IS
27、O 29468, Thermal insulating products for building applications Determination of flatness 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 defin
28、itions For the purposes of this document, the following terms and definitions apply. 3.1 length l long linear dimension of the major surface of the specimen parallel to the longer linear dimension of the original product 3.2 width b short linear dimension of the major surface of the specimen, measur
29、ed at right angles to the length 3.3 deviation from flatness S the maximum distance between the product, placed on a flat surface with the convex side uppermost, and the flat surface 3.4 normal laboratory conditions (23 2) C and (50 5) % relative humidity ISO 29471:2008(E) 2 ISO 2008 All rights rese
30、rved4 Principle Measure length, width and deviation from flatness of the specimens at several time intervals under normal laboratory conditions until relative stability has been achieved. Dimensional stability is determined using one or more of the following methods: method A: Determination of linea
31、r dimensions of full size products; method B: Determination of linear dimensions of products using specimens with dimensions smaller than those of the full-size products; method C: Determination of deviation from flatness of full-size products. 5 Apparatus 5.1 (for method A) Measuring equipment, as
32、defined in ISO 29465. 5.2 (for method B) Frame, fixed on a flat reference surface with a dial gauge of 0,01 mm accuracy or any device (optical, electrical etc.) that has an accuracy of 0,1 mm/m (see examples in Figures 1 and 2) plus either the equipment described in 5.3 (for method B1) or the equipm
33、ent described in 5.4 (for method B2). 5.3 (for method B1) Metal plates, at least 20 mm in diameter (see Figure 1). The actual diameter is chosen so that the pressure exerted by the dial gauge is less than 2 kPa. 5.4 (for method B2) Metal wire (see Figure 2). 5.5 (for method C) Measuring equipment, a
34、s defined in ISO 29468. Any test equipment that provides the same result to at least the same accuracy may be used. ISO 29471:2008(E) ISO 2008 All rights reserved 3 Dimensions in millimetres Key 1 flat reference surface 2 metal plate 3 dial gauge 4 metal bead Figure 1 Example of suitable equipment f
35、or method B1 ISO 29471:2008(E) 4 ISO 2008 All rights reservedDimensions in millimetres Key 1 optical or electrical device 2 rule 3 metal wire Figure 2 Example of suitable equipment for method B2 6 Test specimens 6.1 Dimensions of test specimens The thickness of the specimens shall be equal to the or
36、iginal product thickness. For method A, the specimen shall be the full-size product. For method B1, 500 mm 500 mm or, if less than 500 mm 500 mm, as large as possible. In every case, it shall be greater than 250 mm 250 mm. For method B2, 250 mm 250 mm. For method C, the specimen shall be the full-si
37、ze product. 6.2 Number of test specimens When testing full-size products, the number of specimens shall be as specified in the relevant product standard. If measurements are made on specimens taken from a full-size product, at least three specimens shall be tested. In the absence of a product standa
38、rd or any other international or European technical specification, the number of specimens may be agreed between parties. ISO 29471:2008(E) ISO 2008 All rights reserved 5 6.3 Preparation of test specimens The specimens shall be cut by methods that do not change the structure from that of the origina
39、l product. If specimens are not the full-size products, the length and width directions shall be marked on them. The method of selection of the specimens shall be as specified in the relevant product standard. In the absence of a product standard or any other international or European technical spec
40、ification, the method of selection may be agreed between parties. 6.4 Conditioning of test specimens The specimens shall be conditioned for at least 24 h at (23 2) C and (50 5) % relative humidity. In tropical countries, different conditioning and testing conditions can be relevant. In this case, th
41、e 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 2) C and (50 5) % relative humidity. The specimens shall be conditioned, either vertically or horizontally, with their major faces exposed to the test
42、atmosphere (e.g. supported by wire mesh away from the chamber walls). 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 7.2.1 General Measure dimens
43、ional stability using method A, B, or C. The choice 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 method used may be agreed between parties. Measure the length, the width and the deviat
44、ion from flatness at the start of the test (l 0 , b 0 ,S 0 , respectively) and thereafter at time intervals of 28 days (l t , b t ,S t , respectively), with a minimum total test duration of 28 days. If a more accurate deformation curve is required, measurements may additionally be performed at 1 day
45、, 3 days, 7 days, and 14 days. Continue measurements until the change in dimensions between the last two measurements is less then 10 % of the total change permitted. The total change permitted, , is normally specified in the relevant product standard. In the absence of such a specification, , may b
46、e agreed between parties. The accuracy of the measuring equipment shall be equal to at least /10. Method A shall be used if is 1 % or greater. Method B shall be used if is less then 1 % but greater than 0,1 %. Method C requires an accuracy of 0,5 mm. ISO 29471:2008(E) 6 ISO 2008 All rights reserved7
47、.2.2 Method A Measure the length and width of the full-size product in accordance with ISO 29465. 7.2.3 Method B1 Glue the metal plates to the edges of the specimen, as shown in Figure 1. Measure the dimensions and record to the nearest 0,01 mm. 7.2.4 Method B2 Glue the metal wires to the major face
48、s of the specimen, as shown in Figure 2. Measure the dimensions and record to the nearest 0,005 mm. 7.2.5 Method C Measure the deviation from flatness in accordance with ISO 29468. 8 Calculation and expression of results Calculate the dimensional changes, land b , expressed as percentages, and S , e
49、xpressed in millimetres per metre, from the individual measurements, using Equations (1) to (3), respectively: l 0 100 l l = (1) b 0 100 b b = (2) 33 SS 00 10 or 10 SS lb = = (3) where l, b are the measured overall changes in length and width, expressed in millimetres; S is the measured overall change in flatness, expressed in millimetres; l 0 ,b 0are the measured initial length a
