1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 826:2013Thermal insulating products for building applications Determination of compression behaviourBS EN 826:2013 BRITISH STANDARDNational forewordThis British Standard is
2、 the UK implementation of EN 826:2013. It supersedes BS EN 826:1996, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e B / 5 4 0 , E n e r g y p e r f o r m a n c e o f m a t e r i a l s components and buildings.A list of organizations re
3、presented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2013. Published by BSI Standards Limited 2013.ISBN 978
4、 0 580 78039 4 ICS 91.100.60 Compliance with a British Standard cannot confer immunityfrom legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 March 2013.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 82
5、6:2013EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 826 March 2013 ICS 91.100.60 Supersedes EN 826:1996English Version Thermal insulating products for building applications - Determination of compression behaviour Produits isolants thermiques destins aux applications du btiment - Dtermination
6、 du comportement en compressionWrmedmmstoffe fr das Bauwesen - Bestimmung des Verhaltens bei Druckbeanspruchung This European Standard was approved by CEN on 15 December 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Eur
7、opean Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versio
8、ns (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, B
9、elgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Swi
10、tzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
11、 Ref. No. EN 826:2013: EBS EN 826:2013EN 826:2013 (E) 2 Contents Page Foreword . 3 1 Scope 5 2 Normative references . 5 3 Terms and definitions 5 4 Principle 6 5 Apparatus . 6 6 Test specimens 6 7 Procedure . 7 8 Calculation and expression of results 9 9 Accuracy of measurement . 10 10 Test report 1
12、1 Annex A (normative) Modifications to the general test method for cellular glass products . 12 BS EN 826:2013EN 826:2013 (E) 3 Foreword This document (EN 826:2013) has been prepared by Technical Committee CEN/TC 88 “Thermal insulating materials and products”, the secretariat of which is held by DIN
13、. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2013, and conflicting national standards shall be withdrawn at the latest by September 2013. Attention is drawn to the possibility that
14、some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN 826:1996. The revision of this standard contains no major changes, only minor corrections and clarifi
15、cations of an editorial nature. This European standard has been prepared for building applications, but it may also be used in other areas where it is relevant. This European test standard is one of the following group of related standards on test methods for determining dimensions and properties of
16、 thermal insulation materials and products, all of which fall within the scope of CEN/TC 88: EN 822, Thermal insulating products for building applications Determination of length and width EN 823, Thermal insulating products for building applications Determination of thickness EN 824, Thermal insula
17、ting products for building applications Determination of squareness EN 825, Thermal insulating products for building applications Determination of flatness EN 826, Thermal insulating products for building applications Determination of compression behaviour EN 1602, Thermal insulating products for bu
18、ilding applications Determination of the apparent density EN 1603, Thermal insulating products for building applications Determination of dimensional stability under constant normal laboratory conditions (23 C/50 % relative humidity) EN 1604, Thermal insulating products for building applications Det
19、ermination of dimensional stability under specified temperature and humidity conditions EN 1605, Thermal insulating products for building applications Determination of deformation under specified compressive load and temperature conditions EN 1606, Thermal insulating products for building applicatio
20、ns Determination of compressive creep EN 1607, Thermal insulating products for building applications Determination of tensile strength perpendicular to faces EN 1608, Thermal insulating products for building applications Determination of tensile strength parallel to faces BS EN 826:2013EN 826:2013 (
21、E) 4 EN 1609, Thermal insulating products for building applications Determination of short-term water absorption by partial immersion EN 12085, Thermal insulating products for building applications Determination of linear dimensions of test specimens EN 12086, Thermal insulating products for buildin
22、g applications Determination of water vapour transmission properties EN 12087, Thermal insulating products for building applications Determination of long-term water absorption by immersion EN 12088, Thermal insulating products for building applications Determination of long-term water absorption by
23、 diffusion EN 12089, Thermal insulating products for building applications Determination of bending behaviour EN 12090, Thermal insulating products for building applications Determination of shear behaviour EN 12091, Thermal insulating products for building applications Determination of freeze-thaw
24、resistance EN 12429, Thermal insulating products for building applications Conditioning to moisture equilibrium under specified temperature and humidity conditions EN 12430, Thermal insulating products for building applications Determination of behaviour under point load EN 12431, Thermal insulating
25、 products for building applications Determination of thickness for floating floor insulating products EN 13793, Thermal insulating products for building applications Determination of behaviour under cyclic loading EN 13820, Thermal insulating materials for building applications Determination of orga
26、nic content According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
27、 France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 826:2013EN 826:2013 (E) 5 1 Scope This European Standard specifies th
28、e equipment and procedures to be used when determining the compression behaviour of test specimens. It is applicable to thermal insulating products and can be used to determine the compressive stress in compressive creep tests and for applications in which insulation products are only exposed to sho
29、rt-term loads. The method can be used for quality control purposes. It may also be employed to obtain reference values from which design values can be calculated using safety factors. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and
30、 are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12085, Thermal insulating products for building applications Determination of linear dimensions o
31、f test specimens 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 method for the determination of repeatability and reproducibilit
32、y of a standard measurement method 3 Terms and definitions For the purposes of this standard, the following terms and definitions apply. 3.1 relative deformation ratio of the reduction in thickness of the test specimen to its initial thickness, d0, measured in the direction of loading 3.2 compressiv
33、e strength mratio of the maximum compressive force, Fm, reached when the strain, , at yield (see Figure 1b) or rupture (see Figure 1a) is less than 10 %, to the initial cross-sectional area of the test specimen 3.3 compressive stress at 10 % strain 10ratio of the compressive force, F10, at 10 % stra
34、in, 10, to the initial cross section of the test specimen (see Figures 1c) and 1d) for products presenting 10 % strain before possible yield or rupture 3.4 compression modulus of elasticity E compressive stress divided by the corresponding strain below the proportional limit, when the relationship i
35、s linear Note 1 to entry: See Figure 1. BS EN 826:2013EN 826:2013 (E) 6 4 Principle A compressive force is applied at a given rate of displacement perpendicular to the major faces of a squarely cut test specimen and the maximum stress supported by the specimen calculated. In case of tapered products
36、, the test specimens should be cut to obtain two parallel faces. When the value of the maximum stress corresponds to a strain of less than 10 %, it is designated as compressive strength and the corresponding strain is reported. If no failure is observed before the 10 % strain has been reached, the c
37、ompressive stress at 10 % strain is calculated and its value reported as compressive stress at 10 % strain. 5 Apparatus 5.1 Compression testing machine Compression testing machine, designed to suit the range of force and displacement involved and having two very rigid, polished, square or circular p
38、lane parallel platens with a minimum side length (or diameter) equal to the side length (or diagonal) of the test specimen. One of the plates shall be fixed and the other movable, if appropriate, with a centrally positioned ball joint to ensure that only axial force is applied to the test specimen.
39、The movable plate shall be capable of moving at a constant rate of displacement in accordance with Clause 7. 5.2 Measurement of displacement Displacement measuring device, fitted to the compression testing machine, which allows continuous measurement of the displacement of the movable plate to an ac
40、curacy of 5 % or 0,1 mm, whichever is smaller (see 5.3). 5.3 Measurement of force Sensor fitted to one of the machine plates to measure the force produced by the reaction of the specimen upon the plates. This sensor shall be such that its own deformation during the measuring operation is negligible
41、compared with that being measured or, if not, it shall be taken into account by calculation. In addition, it shall allow the continuous measurement of the force to an accuracy of 1 %. 5.4 Recording device Device for the simultaneous recording of the force, F, and the displacement, X, which provides
42、a curve of F as a function of X (see 7.2). NOTE The curve gives additional information on the behaviour of the product and possibly enables the determination of the compression modulus of elasticity. 6 Test specimens 6.1 Dimensions of test specimens The test specimens shall have the original product
43、 thickness. The width of the test specimens shall be not less than their thickness. Products with integrally moulded skins which are retained in use shall be tested with these skins intact. Test specimens shall not be layered to produce a greater thickness for testing. Test specimens shall be square
44、ly cut and have the following dimensions: 50 mm 50 mm or 100 mm 100 mm or BS EN 826:2013EN 826:2013 (E) 7 150 mm 150 mm or 200 mm 200 mm or 300 mm 300 mm. The choice of dimensions to be used shall be specified in the relevant product standard. In the absence of a product standard, the test specimen
45、dimensions may be agreed between parties. The linear dimensions shall be determined in accordance with EN 12085, to an accuracy of 0,5 %. The tolerance on parallelism and flatness between the two faces of the specimen shall be not greater than 0,5 % of the test specimen side length or 0,5 mm, whiche
46、ver is smaller. If the specimens are not flat, they shall be ground flat or an adequate coating shall be applied to prepare the surface for the test. No significant deformation shall occur in the coating during the test. The accuracy of the test result is reduced if the test specimens have a thickne
47、ss of less than 20 mm. 6.2 Preparation of test specimens Test specimens shall be cut so that their base is normal to the direction of compression of the product in its intended use. The test specimens shall be cut by methods that do not change the structure with regard to that of the original produc
48、t. The method of selecting the test specimens shall be as specified in the relevant product standard. In the case of tapered products, the parallelism of the two faces of the test specimen shall be in accordance with 6.1. In the absence of a product standard, the method of selecting the test specime
49、ns may be agreed between parties. Special methods of preparation, when needed, are given in the relevant product standard. In cases where a more complete characterisation is desired or where the principal direction of anisotropy is unknown, it may be necessary to prepare additional sets of test specimens. 6.3 Number of test specimens The number of test specimens shall be as specified in the relevant product standard. In the absence of such a sp
