BS EN 13496-2013 Thermal insulation products for building applications Determination of the mechanical properties of glass fibre meshes as reinforcement for External Thermal Insula.pdf

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1、BSI Standards PublicationBS EN 13496:2013Thermal insulation productsfor building applications Determination of themechanical properties of glassfibre meshes as reinforcementfor External Thermal InsulationComposite Systems withrenders (ETICS)BS EN 13496:2013 BRITISH STANDARDNational forewordThis Brit

2、ish Standard is the UK implementation of EN 13496:2013. Itsupersedes BS EN 13496:2002 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/540, Energy performance of materials components andbuildings.A list of organizations represented on this committee ca

3、n beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 77288 7ICS 91.100.60Complian

4、ce with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 October 2013.Amendments issued since publicationDate Text affectedBS EN 13496:2013EUROPEAN STANDARD NORME EUROPENNE EURO

5、PISCHE NORM EN 13496 October 2013 ICS 91.100.60 Supersedes EN 13496:2002English Version Thermal insulation products for building applications - Determination of the mechanical properties of glass fibre meshes as reinforcement for External Thermal Insulation Composite Systems with renders (ETICS) Pro

6、duits isolants thermiques pour le btiment - Dtermination des caractristiques mcaniques des treillis de fibres de verre servant renforcer les systmes composites disolation thermique par lextrieur (ETICS) avec des enduits Wrmedmmstoffe fr das Bauwesen - Bestimmung der mechanischen Eigenschaften von Gl

7、asfasergewebe als Armierung fr auenseitige Wrmedmm-Verbundsysteme mit Putz (WDVS) This European Standard was approved by CEN on 31 August 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a n

8、ational 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 versions (English, French, German). A

9、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, Belgium, Bulgaria, Croatia, Cypru

10、s, 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, Switzerland, Turkey and United King

11、dom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC 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. Ref. No. EN 13496:2

12、013: EBS EN 13496:2013EN 13496:2013 (E) 2 Contents Page Foreword . 3 1 Scope 4 2 Normative references . 4 3 Terms and definitions 4 4 Principle 4 5 Apparatus . 4 6 Test specimens 5 6.1 Number of test specimens . 5 6.2 Dimensions of the test specimens 5 6.3 Preparation of the test specimens 5 6.3.1 S

13、ampling . 5 6.3.2 Determination of the number of threads per 50 mm width of the specimen . 5 6.3.3 Determination of the number of threads per specimen to be tested . 6 6.4 Conditioning of the test specimens 7 6.4.1 Storage under normal conditions 7 6.4.2 Storage in aggressive medium 7 6.4.3 Wash and

14、 drying procedure 7 7 Procedure . 7 7.1 Test conditions . 7 7.2 Attachment of the test specimens in the tensile testing machine . 7 7.3 Test procedure . 8 8 Calculation and expression of results 8 9 Accuracy of measurement . 8 10 Test report 9 BS EN 13496:2013EN 13496:2013 (E) 3 Foreword This docume

15、nt (EN 13496:2013) has been prepared by Technical Committee CEN/TC 88 “Thermal insulating materials and products”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the la

16、test by April 2014, and conflicting national standards shall be withdrawn at the latest by April 2014. Attention is drawn to the possibility that 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 suc

17、h patent rights. This document supersedes EN 13496:2002. The main changes with respect to the previous edition are listed below: addition of sampling in Clause 6; addition of Figure 1; amendment of the test evaluation in Clause 8. According to the CEN-CENELEC Internal Regulations, the national stand

18、ards 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Lu

19、xembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 13496:2013EN 13496:2013 (E) 4 1 Scope This European Standard specifies equipment and procedures for determining the tensile strength and elongation of

20、 glass fibre meshes which are used for the reinforcement of the base coat in External Thermal Insulation Composite Systems (ETICS). 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated re

21、ferences, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 1607, Thermal insulating products for building applications Determination of tensile strength perpendicular to faces EN ISO 9229:2007, Thermal insula

22、tion Vocabulary (ISO 9229:2007) ISO 1887, Textile glass Determination of combustible-matter content 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN ISO 9229:2007 and the following apply. 3.1 tensile strength of glass fibre mesh strength of the test sp

23、ecimen at failure relative to the width of the test specimen 4 Principle The tensile strength of glass fibre meshes is determined at failure using a tensile testing machine. 5 Apparatus 5.1 Tensile testing machine, appropriate for the range of force and displacement involved, capable of having a con

24、stant crosshead speed adjusted to (50 5) mm/min. It shall be capable of measuring the force with an accuracy of 1 % in accordance with EN 1607. 5.2 Clamps of the tensile testing machine, which shall be coated with a material to ensure attachment without slippage of the test specimen, for example, ru

25、bber and shall fasten the test specimen across its whole width. The clamps shall be sufficiently rigid to resist deformation during the test. 5.3 Container, which shall be wide and deep enough so that the test specimens can be immersed completely in an alkaline test solution. This can be a cylindric

26、al container, of volume (2,5 0,5) l of height (48 1) cm, of internal diameter (8 0,5) cm, in which (2 0,1) l of the alkaline test solution is introduced. The material of the container shall be resistant to the alkaline test solution (e.g. plastics or stainless steel). BS EN 13496:2013EN 13496:2013 (

27、E) 5 6 Test specimens 6.1 Number of test specimens Seven test specimens shall be used in warp direction, stored under normal conditions. Seven test specimens shall be used in warp direction, stored in aggressive medium. Seven test specimens shall be used in weft direction, stored under normal condit

28、ions. Seven test specimens shall be used in weft direction, stored in aggressive medium. 6.2 Dimensions of the test specimens The tensile strength of the meshes are tested in both the warp and the weft directions. The test specimen shall contain a minimum number of five threads within the width. The

29、 ratio of the length between the clamps to the width of the test specimen shall be 4 : 1 at minimum. The dimensions of the test specimens shall be a minimum of 300 mm 45 mm. 6.3 Preparation of the test specimens 6.3.1 Sampling The test specimens shall be cut from the original packed product after re

30、moval of the first 5 m of the roll and at a distance of at least 100 mm from the edges. The test specimen shall be cut between the single warp or weft threads. The number of threads in the warp or in the weft direction shall be the same for the seven test specimens. The number of the threads shall b

31、e indicated in the test report. Test specimens shall not be bent or folded and shall be handled carefully during the whole test procedure. 6.3.2 Determination of the number of threads per 50 mm width of the specimen The determination of the number of threads is specified each from middle of the mesh

32、 to middle of the mesh for the following measured distances. Weft direction: total width of the roll, however about 1 m at maximum Warp direction: about 1 m BS EN 13496:2013EN 13496:2013 (E) 6 Key l measuring distance from middle of the mesh to middle of the mesh Figure 1 Determination of the number

33、 of threads Within this measuring distance, l, as shown in Figure 1, the threads are counted, and the calculated number of threads n50per 50 mm width of the specimen is calculated in accordance with Formula (1): 5050=lnn (1) where n50is the calculated number of threads per 50 mm width of the specime

34、n, to the nearest 0,1; n is the number of threads within the measuring distance l, to the nearest 1; l is the measuring distance in millimetres, to the nearest 1 mm. 6.3.3 Determination of the number of threads per specimen to be tested For the specification of the number of threads per specimen to

35、be tested, ntested, the value of n50is determined as a whole number as follows: first place after the decimal point 5: round down; first place after the decimal point 5: round up. Cutting out of the number of threads to be tested, ntested, always takes place in the middle of the mesh. NOTE Because o

36、f the fact that cutting out takes place in the middle of the mesh, the total width of the mesh strips can differ by 5 mm from the nominal measure 50 mm. BS EN 13496:2013EN 13496:2013 (E) 7 6.4 Conditioning of the test specimens 6.4.1 Storage under normal conditions The test specimens shall be stored

37、 at (23 2) C and (50 5) % relative humidity for at least 24 h. 6.4.2 Storage in aggressive medium The test specimens shall be stored in the following alkaline test solution for 24 h at (60 2) C. Add given amounts of substances to one litre of demineralised water: Ca(OH)20,5 g at minimum purity of 96

38、 % by mass; NaOH 1 g at minimum purity of 97 % by mass; KOH 4 g at minimum purity of 85 % by mass. For the preparation of the alkaline test solution, the reagents shall be dissolved in distilled water in the given order above. For the storage of 30 g to 35 g glass fibre mesh, 1 l of the alkaline tes

39、t solution is necessary. If the glass mesh to be tested is only used in a base coat according to EN 15824, then it is also possible to use an aggressive medium consisting of a 20 % suspension of base coat in water at (60 2) C. 6.4.3 Wash and drying procedure After storage in the aggressive medium, t

40、he test specimens shall be gently rinsed in running tap water at (20 5) C until the pH value at the surface of the specimens is less than 9, as measured with pH indicator paper. The test specimens shall be stored for 60 min in 0,5 % (by mass) hydrochloric acid. After this storage, the test specimens

41、 shall be gently rinsed in running tap water at (20 5) C, without significant mechanical movement until a pH value of 6 to 8 is stabilised, measured carefully with pH indicator paper. The test specimens shall be dried for 60 min at (60 2) C and afterwards stored for at least 24 h at (23 2) C and (50

42、 5) % relative humidity before testing. 7 Procedure 7.1 Test conditions The test shall be carried out at (23 2) C. 7.2 Attachment of the test specimens in the tensile testing machine The test specimens shall be attached between the two clamps, which are fastened in the tensile testing machine. A sel

43、f-aligning attachment on the top clamp avoids uneven distribution of tensile stress during the test. The test specimen shall be located perpendicular to the clamps of the tensile testing machine. The distance between the clamps shall be a minimum of 200 mm. BS EN 13496:2013EN 13496:2013 (E) 8 7.3 Te

44、st procedure The test shall be carried out in the warp and the weft directions before and after storage of the test specimens in the aggressive medium. Preload the test specimens at 5 mm/min until the load of 10 N is reached. Measure the resulting length, l0, of the test specimen. Increase the load

45、with a constant crosshead speed of (50 5) mm/min until failure occurs. Record the force, F, in Newton and the corresponding length, l, in millimetres. Discard the result of the test of any test specimen where the specimen is displaced within the clamp, or where the failure occurred at the clamp (maj

46、ority of the threads break directly at the clamps). 8 Calculation and expression of results The tensile strength per 50 mm width of the specimen is calculated in accordance with Formula (2) in each type of conditioning and direction of test. 50testedmax50nnFR = (2) where R50is the tensile strength i

47、n Newton per 50 mm width of the specimen at the maximum load to the nearest 0,1 N per 50 mm for single values and to the nearest 1 N per 50 mm for the mean value; Fmaxis the maximum load, in Newton, to the nearest 0,1 N; ntestedtested number of threads per specimen to the nearest 1; n50is the calcul

48、ated number of threads per 50 mm width of the specimen, to the nearest 0,1. The elongation per 50 mm width of the specimen is calculated in accordance with Formula (3) in each type of conditioning and direction of test. 10000maxF50=lll (3) where 50is the elongation in percent per 50 mm width of the

49、specimen to the nearest 1 % per 50 mm for single values and to the nearest 1 % per 50 mm for the mean value; lFmaxis the length, in millimetres, at the maximum load, to the nearest 1 mm; l0is the length, in millimetres, after preload, to the nearest 1 mm. The test result is the mean value of the elongation, 50, calculated from at least 5 single values. 9 Accuracy of measurement NOTE It has not been possible to include a statement on the accuracy of the measurement in this document. Such a stat