1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 495-5:2013Flexible sheets forwaterproofing Determination of foldability atlow temperaturePart 5: Plastic and rubber sheets for roofwaterproofingBS EN 495-5:2013 BRITISH STA
2、NDARDNational forewordThis British Standard is the UK implementation of EN 495-5:2013. Itsupersedes BS EN 495-5:2001 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/546, Flexible sheets for waterproofing and watervapour control.A list of organizations
3、 represented on this committee can 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
4、 580 80226 3ICS 91.100.50Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 June 2013.Amendments issued since publicationDate Text affectedBS EN 495-5:2013EUROPEAN
5、 STANDARD NORME EUROPENNE EUROPISCHE NORM EN 495-5 May 2013 ICS 91.100.50 Supersedes EN 495-5:2000English Version Flexible sheets for waterproofing - Determination of foldability at low temperature - Part 5: Plastic and rubber sheets for roof waterproofing Feuilles souples dtanchit - Dtermination de
6、 la pliabilit basse temprature - Partie 5 : Feuilles dtanchit de toiture plastiques et lastomres Abdichtungsbahnen - Bestimmung des Verhaltens beim Falzen bei tiefen Temperaturen - Teil 5: Kunststoff- und Elastomerbahnen fr Dachabdichtungen This European Standard was approved by CEN on 28 March 2013
7、. 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
8、 application to the CEN-CENELEC 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 CEN-CENEL
9、EC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy
10、, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17,
11、 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 495-5:2013: EBS EN 495-5:2013EN 495-5:2013 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Princip
12、le 6 5 Apparatus .6 6 Sampling .6 7 Preparation of test specimens .6 8 Procedure .6 9 Expression of results 8 10 Precision of results8 11 Test report 9 BS EN 495-5:2013EN 495-5:2013 (E) 3 Foreword This document (EN 495-5:2013) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for
13、waterproofing”, the secretariat of which is held by NEN. 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 November 2013, and conflicting national standards shall be withdrawn at the latest by Novem
14、ber 2013. 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 such patent rights. This document supersedes EN 495-5:2000. This document has been technically a
15、nd editorially revised in order to: add the possibility of instrumented apparatus; add precision data of a Round Robin test. This document has been prepared under a mandate given to CEN by the European Commission and the European Free Trade Association. According to the CEN-CENELEC Internal Regulati
16、ons, 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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy
17、, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 495-5:2013EN 495-5:2013 (E) 4 Introduction This European Standard is intended for characterisation of plastic and rubber sheets
18、 as manufactured or supplied before use. This test method relates to products or to their components where appropriate, and not to waterproofing membrane systems composed of such products and installed in the works. This test is intended to be used in conjunction with European Standards for plastic
19、and rubber sheets for waterproofing. BS EN 495-5:2013EN 495-5:2013 (E) 5 1 Scope This European Standard specifies a method for the determination of the behaviour of plastic and rubber sheets for waterproofing to folding after exposure at a low temperature. 2 Normative references The following docume
20、nts, in whole or in part, are normatively referenced in this document and 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 13416, Flexible sheets f
21、or waterproofing Bitumen, plastic and rubber sheets for roof waterproofing Rules for sampling EN 1849-2, Flexible sheets for waterproofing Determination of thickness and mass per unit area Part 2: Plastic and rubber sheets 3 Terms and definitions For the purposes of this document, the following term
22、s and definitions apply. 3.1 top surface upper side of the sheet, as used in situ Note 1 to entry: It is usually the inside of the roll. 3.2 bottom surface lower side of the sheet, as used in situ Note 1 to entry: It is usually the outside of the roll. 3.3 overall thickness thickness of the sheet ex
23、cluding any surface profile Note 1 to entry: See EN 1849-2. BS EN 495-5:2013EN 495-5:2013 (E) 6 4 Principle The principle of the test is to place the looped test specimen in an adequate folding apparatus. Expose the looped test specimen to a specified low temperature for 1 h. Close the folding appar
24、atus within 1 s and maintain this position for minimum 1 s. Allow the test specimen to warm to room temperature and examine the folded area under 6 x magnification. 5 Apparatus The testing equipment consists of parts indicated in 5.1 to 5.3. 5.1 Folding apparatus Metal folding apparatus or instrumen
25、ted apparatus with adjustable parallel plates. (See Figure 1 for examples of such apparatuses.) 5.2 Conditioning room Cold chamber with air circulation, adjustable at temperatures down to 45 C with an accuracy of 2 C. 5.3 Inspection tool Magnifying glass with six times magnification. 6 Sampling Samp
26、les shall be taken in accordance with EN 13416. 7 Preparation of test specimens Take four test specimens of 100 mm x 50 mm, two in the longitudinal (L) direction and two in the transversal (T) direction of the sheet for each temperature interval. NOTE For testing after artificial ageing, it is possi
27、ble to reduce the amount of tested material. In this case, take two test specimens of 50 mm x 25 mm in one direction of the sheet for each temperature interval. 8 Procedure 8.1 Temperature All operations of this procedure outside the cold chamber shall be performed at a temperature of (23 5) C. 8.2
28、Thickness Measure the overall thickness of each test specimen according to EN 1849-2. If the effective thickness is within the declared tolerance, the declared thickness of the product or the measured thickness of the specimen can be used to adjust the plates. BS EN 495-5:2013EN 495-5:2013 (E) 7 Fig
29、ure 1 - Example of folding apparatus BS EN 495-5:2013EN 495-5:2013 (E) 8 8.3 Looping Loop the test specimen lengthways and fix the ends together, for example with adhesive tape. Fold one L and one T test specimen so that the top surface of the sheet forms the outside of the loop. Similarly fold the
30、other two L and T test specimens so that the top surface of the sheet forms the inside of the loop. 8.4 Plate distance Adjust the distance between the plates of the folding apparatus at a value of three times the test specimens overall thickness (see 8.2). Check the distance between the plates in fo
31、ur points as indicated in Figure 1. 8.5 Position of test specimen Place the looped test specimen in the apparatus with the taped edges parallel to the hinge of the folding plate as indicated in Figure 1. Place the open folding apparatus with the test specimen in the cold chamber regulated at the spe
32、cified temperature. 8.6 Folding After 1 h exposure, close the folding apparatus within 1 s and maintain this position for minimum 1 s, for example from the vertical position through 90 to horizontal position. This closing procedure takes place in the cold chamber. The temperature of the folding appa
33、ratus should not change more than 2 C within these 2 s. 8.7 Conditioning Remove the test specimen from the apparatus and allow warming to room temperature (23 5) C. 8.8 Inspection Examine the test specimen for cracks or fractures in the folded area with the six times magnifying glass. 8.9 Determinat
34、ion of cold folding temperature The folding procedure shall be repeated at 5 C steps. Fresh test specimens shall be used for each test temperature. 8.10 Testing of sheets with backing The samples for sheets with backing have to be taken from the uncoated area, e.g. the area used for welding. Sheets
35、with backing are only tested in machine direction. If there is no uncoated area (e.g. testing of sheets after uses within a waterproofing system), only the top area should be tested. To adjust the plate, the overall thickness according to EN 1849-2 should be used. 9 Expression of results When applyi
36、ng the step by step procedure described in 8.9, the cold folding temperature of the sheet is the lowest 5 C temperature step where none of the test specimens have cracks or fractures. 10 Precision of results Precision data are based on a Round Robin test involving seven European laboratories. Two ty
37、pes of PVC-p membranes were tested: a PES-reinforced 1,5 mm and a homogeneous bitumen compatible 1,5 mm BS EN 495-5:2013EN 495-5:2013 (E) 9 membrane. All test pieces were prepared and distributed by one laboratory. All laboratories determined the same values within the 5 C steps. 11 Test report The
38、test report shall at least include the following information: a) reference to this European Standard (EN 495-5) and any deviation from it; b) all details necessary to identify the product tested; c) information on sampling in accordance with EN 13416; d) details of preparation of the test specimen i
39、n accordance with Clause 7; e) test results in accordance with Clause 9; f) any peculiarities in the method employed or encountered during the test; g) date of the test(s). This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparin
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