BS-EN-13496-2002.pdf

BRITISH STANDARD BS EN 13496:2002 Thermal insulation products for building applications Determination of the mechanical properties of glass fibre meshes The European Standard EN 13496:2002 has the status of a British Standard ICS 91.100.60 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:34:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 13496:2002 This British Standard, having been prepared under the direction of the Building and Civil Sector Policy and Strategy Committee, was published under the authority of the Standards Policy and Strategy Committee on 4 November 2002 © BSI 4 November 2002 ISBN 0 580 40682 2 National foreword This British Standard is the official English language version of EN 13496:2002. The UK participation in its preparation was entrusted by Technical Committee B/540, Energy performance of materials, components and buildings, to Subcommittee B/540/1, European standards for thermal insulation, which has the responsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:34:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 13496 October 2002 ICS 91.100.60 English version Thermal insulation products for building applications - Determination of the mechanical properties of glass fibre meshes Produits isolants thermiques destinés aux applications du bâtiment - Détermination des caractéristiques mécaniques des treillis de fibres de verre Wärmedämmstoffe für das Bauwesen - Bestimmung der mechanischen Eigenschaften von Glasfasergewebe This European Standard was approved by CEN on 19 August 2002. 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 national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Management Centre or to any CEN member. This European Standard exists in three official versions (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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2002 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13496:2002 E Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:34:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13496:2002 (E) 2 Contents page Foreword3 1Scope 4 2Normative references 4 3Terms and definitions, symbols and units,.4 3.1Terms and definitions4 3.2Symbols and units.4 4Principle5 5Apparatus .5 5.1Tensile testing machine5 5.2Clamps5 5.3Container 5 6Test specimens5 6.1Number of test specimens5 6.2Dimensions of the test specimens.5 6.3Preparation of the test specimens.5 6.4Conditioning of the test specimens.6 6.4.1Storage under ambient conditions.6 6.4.2Storage in aggressive medium.6 6.4.3Wash and drying procedure .6 7Procedure .6 7.1Test conditions 6 7.2Attachment of the test specimens in the tensile testing machine6 7.3Test procedure.6 8Calculation and expression of results.7 9Accuracy of measurement7 10Test report 7 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:34:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13496:2002 (E) 3 Foreword This document (EN 13496:2002) 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 latest by April 2003, and conflicting national standards shall be withdrawn at the latest by April 2003. This European Standard is one of a series of standards which specify test methods for determining dimensions and properties of thermal insulating materials and products. It supports a series of product standards for thermal insulating materials and products which derive from the Council Directive of 21 December 1988 on the approximation of laws, regulations and administrative provisions of the Member States relating to construction products (Directive 89/106/EEC) through the consideration of the essential requirements. This European Standard has been drafted for applications in buildings but may also be used in other areas where it is relevant. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:34:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13496:2002 (E) 4 1 Scope This European Standard specifies equipment and procedures for determining the tensile strength and elongation of glass fibre meshes which are used for the reinforcement of the base coat in External Thermal Insulation Composite Systems (ETICS). 2 Normative references This European Standard incorporates, by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references subsequent amendments to, or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies (including amendments). EN 1607, Thermal insulating products for building applications Determination of tensile strength perpendicular to faces. prEN 13499:1999, Thermal insulation products for buildings External Thermal Insulation Composite Systems (ETICS) based on expanded polystyrene Specification. prEN ISO 9229:1997, Thermal insulation Definitions of terms (ISO 9229:1997). ISO 1887, Textile glass Determination of combustible-matter content. 3 Terms and definitions, symbols and units, 3.1 Terms and definitions For the purposes of this European Standard the terms and definitions given in prEN ISO 9229:1997 and prEN 13499:1999 apply together with the following. 3.1.1 elongation of glass fibre mesh the elongation of glass fibre mesh, F, is the quotient of the change in length, lF l0, and the length of the test specimen between the clamps at the failure, lF 3.1.2 tensile strength of glass fibre mesh the tensile strength of glass fibre mesh is the strength of the test specimen at failure relative to the width of the test specimen 3.2 Symbols and units Symbols used in this standard: FFis the force at failure, in N; l0is the distance between the clamps, in mm; lFis the distance between the clamps at failure, in mm; wis the width of the test specimen, in mm; Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:34:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13496:2002 (E) 5 Fis the tensile strength of the test specimen in relation to the width of the test specimen, in N/mm; Fis the elongation at failure, in mm/mm. 4 Principle The tensile strength and the elongation of glass fibre meshes are determined at failure using a tensile testing machine. 5 Apparatus 5.1 Tensile testing machine Tensile testing machine, appropriate for the range of force and displacement involved, capable of having a constant crosshead speed adjusted to (50 + 5) mm/min. It shall be capable of measuring the force and elongation to an error limit of at least 1 % (in accordance with EN 1607). 5.2 Clamps The clamps of the tensile testing machine shall be coated with a material to ensure attachment without slippage of the test specimen, for example, rubber 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 The container shall be wide and deep enough so that the test specimens can be immersed completely in an alkaline test solution. This can be a cylindrical 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). 6 Test specimens 6.1 Number of test specimens Seven test specimens shall be used in warp direction, stored under ambient 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 ambient conditions. 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 ratio of the length between the clamps to the width of the test specimen shall be 4 : 1. The dimensions of the test specimens shall be a minimum of 300 mm × 50 mm. 6.3 Preparation of the test specimens The test specimens shall be cut from the original packed product after removal 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 threats shall be indicated in the test report. Test specimens shall not be bent or folded and shall be handled carefully during the whole test procedure. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:34:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13496:2002 (E) 6 6.4 Conditioning of the test specimens 6.4.1 Storage under ambient conditions The test specimens shall be stored 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. Concentrations in g/l distilled water: Ca(OH)20,5 gat 96 % NaOH1 gat 97 % KOH4 gat 85 % For the preparation of the alkaline test solution the reagents must 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 test solution is necessary. NOTE 1Users who do not have reagents in the indicated concentration shall correct for the difference in mass. NOTE 2If the glass mesh to be tested is only used in a specified base coat, 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 the 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 1 h in 0,5 % hydrochloric acid. After this storage, the test specimens shall be gently rinsed in running tap water at (20 ± 5) °C, without significant mechanical movement until a pH value of 7, is 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 ± 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 self-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. 7.3 Test 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 tensile force with a constant crosshead speed of (50 ± 5) mm/min until failure occurs. Record the force, FF, in newtons and the length, lF, in millimetres. Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 09:34:22 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 13496:2002 (E) 7 Discard any test specimen where the specimen is displaced within the clamp, or where the failure occurred at the clamp. NOTE If the change of length at increasing tensile force is recorded, further information on the mechanical properties of glass fibre meshes are acquired. 8 Calculation and expression of results Calculate and express the following values for each type of conditioning and direction of testing, using the equations (1) and (2): All individual values of the tensile strength, F , in newtons per millimetre wF / FF =(1) where FFis the force at failure, in newtons; wis the width of the test specimen, in millimetres. All individual