ISO 12344-2010 Thermal insulating products for building applications - Determination of bending behaviour《建筑物应用隔热产品 弯曲行为测定》.pdf

1、 Reference number ISO 12344:2010(E) ISO 2010INTERNATIONAL STANDARD ISO 12344 First edition 2010-05-01 Thermal insulating products for building applications Determination of bending behaviour Produits isolants thermiques destins aux applications du btiment Dtermination du comportement en flexion ISO

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5、 below. COPYRIGHT PROTECTED DOCUMENT ISO 2010 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 at the a

6、ddress 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 2010 All rights reservedISO 12344:2010(E) ISO 2010 All rights

7、reserved iiiContents Page Foreword iv Introduction.v 1 Scope1 2 Normative references1 3 Terms and definitions .1 4 Principle2 5 Apparatus.2 6 Test specimens4 6.1 Dimensions of test specimens.4 6.2 Number of test specimens4 6.3 Preparation of test specimens .4 6.4 Conditioning of test specimens.4 7 P

8、rocedure.5 7.1 Test conditions 5 7.2 Test procedure.5 8 Calculation and expression of results 5 8.1 General.5 8.2 Bending strength.5 8.3 Bending stress and deflection .6 9 Accuracy of measurement7 10 Test report7 ISO 12344:2010(E) iv ISO 2010 All rights reservedForeword ISO (the International Organi

9、zation 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 technical committees. Each member body interested in a subject for which a technical committee has been establishe

10、d 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 closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

11、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. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Pub

12、lication 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 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent

13、 rights. ISO 12344 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 12344 is based on EN 12089:1997, prepared by Technical Committee CEN/TC 88, Thermal insulating materials and products.

14、However, 6.4, Conditioning of the test specimens, 7.1, Test conditions, and Clause 10, Test report, have been modified to reflect the conditions for tropical countries. ISO 12344:2010(E) ISO 2010 All rights reserved vIntroduction This International Standard is based on EN 12089:1997, prepared by Tec

15、hnical Committee CEN/TC 88, Thermal insulating materials and products, which has been amended by ISO/TC 163/SC 1 with reference to conditioning and test conditions in tropical countries. This International Standard is one of a series of documents specifying test methods, based on existing European S

16、tandards, that are being adopted by ISO. This “package” of standards includes the following group of interrelated documents. International Standard Title Respective EN standard ISO 12344 Thermal insulating products for building applications Determination of bending behaviour EN 12089 ISO 12968 Therm

17、al insulation products for building applications Determination of the pull-off resistance of external thermal insulation composite systems (ETICS) (foam block test) EN 13495 ISO 29465 Thermal insulating products for building applications Determination of length and width EN 822 ISO 29466 Thermal ins

18、ulating products for building 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 insulatin

19、g products for building 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 unde

20、r constant normal laboratory conditions (23 C/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 applicat

21、ions Determination 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 Deter

22、mination of tensile 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 29768 Thermal insulating products for building applications Determination of linear dimensions of test

23、specimens EN 12085 ISO 29769 Thermal insulating products for building applications Determination of behaviour under point load EN 12430 ISO 12344:2010(E) vi ISO 2010 All rights reservedISO 29770 Thermal insulating products for building applications Determination of thickness for floating-floor insul

24、ating products 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 134

25、97 ISO 29804 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

26、 glass fibre meshes EN 13496 INTERNATIONAL STANDARD ISO 12344:2010(E) ISO 2010 All rights reserved 1Thermal insulating products for building applications Determination of bending behaviour 1 Scope This International Standard specifies the equipment and procedures for determining the bending behaviou

27、r of full-size products (Method A) and test specimens (Method B) under the action of three-point loading. It is applicable to thermal insulating products for building applications. The test is designed to determine the bending strength of products and their deflection at a given load. The method can

28、 be used to determine the resistance of the product to bending stresses during transport and application. 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, th

29、e latest edition of the referenced document (including any amendments) applies. ISO 5725-1, Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions ISO 5725-2, Accuracy (trueness and precision) of measurement methods and results Part 2: Basic m

30、ethod for the determination of repeatability and reproducibility of a standard measurement method ISO 29465, Thermal insulating products for building applications Determination of length and width ISO 29466, Thermal insulating products for building applications Determination of thickness ISO 29768,

31、Thermal insulating products for building applications Determination of linear dimensions of test specimens 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 bending strength bmaximum stress calculated from the maximum force, F m , recorded duri

32、ng the bending procedure 3.2 bending stress Xstress calculated from the force, F X , at the deflection, X ISO 12344:2010(E) 2 ISO 2010 All rights reserved3.3 deflection X vertical displacement of the test specimen at mid-span, at the force F X , measured at the loading edge 4 Principle The test meth

33、od consists of applying, at a given speed, a force, F, by means of a loading edge in an axial direction to the faces of a squarely cut rectangular test specimen, which is placed on two support edges. The force is applied to the test specimen at a position midway between the supporting positions, len

34、gth L/2 (see Figure 1). a) Bending strength b) Deflection, X Figure 1 Principle of test method 5 Apparatus 5.1 Test machine, suitable for the range of force and displacement involved, and with a loading edge and adjustable support edges. The test machine shall be capable of operating at a constant r

35、ate of movement of the movable head. The test machine includes the elements described in 5.1.1 to 5.1.3. 5.1.1 Two adjustable support edges, comprising the test specimen supports of two adjustable cylindrical support edges placed parallel to each other and in the same horizontal plane. The diameter

36、of the supports shall be (80 3) mm or (30 3) mm (see Figure 2). The length of the support edges shall be at least equal to the width of the test specimens. ISO 12344:2010(E) ISO 2010 All rights reserved 3The span, L (see Figure 2), between the support edges shall be adjustable in the range 300 mm to

37、 1 200 mm (Method A) or 200 mm to 500 mm (Method B). 5.1.2 Loading edge, with the same shape and dimensions as the support edges. The loading edge shall be located centrally between and parallel to the supporting edges. 5.1.3 Load distribution plates, made of steel, with a thickness of at least 1 mm

38、 for products which may be subject to crushing by the loading and support edges. The width of the distribution plates shall be (30 1) mm or (80 3) mm and their length shall be at least equal to the width of the test specimen. 5.2 Measuring devices for displacement and force 5.2.1 Measurement of disp

39、lacement The test machine shall be fitted with a system that allows continuous measurement of the displacement of the movable loading edge with an accuracy of 5 % or 0,1 mm, whichever is the smaller. The measured displacement corresponds to the deflection, X, of the test specimen. 5.2.2 Measurement

40、of force A force sensor shall be fixed to the loading edge in order to measure the force, F, produced by the reaction of the test specimen upon the edges during the test. This sensor shall be such that its own deformation during the course of the measuring operation is negligible compared with that

41、being measured or may be taken into account by calculation. In addition, it shall allow the continuous measurement of the force at all times permitting readings to 1 %. A device shall be used for the simultaneous recording of the force, F, and the deflection, X, to provide the force-deflection curve

42、, required in Clause 7. Key 1 loading edge 2 test specimen with thickness d 3 support edges a 50 mm for Method A, 25 mm for Method B L span between the support edges Figure 2 Principles of apparatus for testing of bending behaviour ISO 12344:2010(E) 4 ISO 2010 All rights reserved6 Test specimens 6.1

43、 Dimensions of test specimens 6.1.1 Method A The test specimen is a full-size product. It shall be a squarely cut rectangle having the following dimensions: thickness: original product thickness; length: length of the full-size product, with a maximum of 1 300 mm; width: width of the full-size produ

44、ct. If this is impossible because of limitations caused by the testing machine, the width shall be at least 300 mm. 6.1.2 Method B The test specimen shall be a squarely cut rectangle having the following dimensions: thickness: original product thickness with a maximum of 100 mm; length: 5 times the

45、nominal thickness plus 50 mm (but not greater than 550 mm); width: 150 mm. Other dimensions of the test specimen may be given in the relevant product standard or any other European technical specification, or agreed between the parties involved. 6.2 Number of test specimens The number of test specim

46、ens shall be as specified in the relevant product standard or any other European technical specification. In the absence of such a specification, at least three test specimens shall be used. In the absence of a product standard or any other European technical specification, the number of test specim

47、ens may be agreed between the parties involved. If the direction of the bending force on the product in its application is not known, and/or the product has different surface skins, facings and/or coatings on its two main faces, then additional sets of test specimens shall be used. 6.3 Preparation o

48、f test specimens Cut the test specimens by methods that do not change the original structure of the product. Any skins, facings and/or coatings shall be retained. 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 sto

49、red at (23 2) C and (50 5) % relative humidity for the time stated in the relevant product standard with a minimum of 6 h. In tropical countries, different conditioning and testing conditions can be relevant. In this case, the conditions shall be (27 2) C and (65 5) % relative humidity and shall be stated clearly in the test report. ISO 12344:2010(E) ISO 2010 All rights reserved 57 Procedure 7.1 Test conditions The test shall be carrie