1、$XJXVW7UDQVODWLRQE,16SUDFKHQGLHQVW(QJOLVKSULFHJURXS1RSDUWRIWKLVWUDQVODWLRQPDEHUHSURGXFHGZLWKRXWSULRUSHUPLVVLRQRI,1HXWVFKHV,QVWLWXWIU1RUPXQJH9%HUOLQ%HXWK9HUODJ*PE+%HUOLQ*HUPDQKDVWKHHFOXVLYHULJKWRIVDOHIRU*HUPDQ6WDQGDUGV ,11RUPHQ , b) precision data of a Round Robin test have been added; c) specificati
2、ons relating to the preparation of test specimens have been revised; d) specifications relating to folding have been revised; e) specifications relating to the testing of sheets with backing have been added. Previous editions DIN 16726: 1986-12 DIN 16730: 1976-05 DIN 16731: 1976-05 DIN 16732-1: 1976
3、-05 DIN 16732-2: 1976-05 DIN 16734: 1979-12 DIN 16935: 1961-12, 1967-06, 1971-05 DIN 16937: 1968-07, 1971-05 DIN 16938: 1971-05 DIN EN 495-5: 2001-02 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 495-5 May 2013 ICS 91.100.50 Supersedes EN 495-5:2000English Version Flexible sheets for waterpro
4、ofing - Determination of foldability at low temperature - Part 5: Plastic and rubber sheets for roof waterproofing Feuilles souples dtanchit - Dtermination de la pliabilit basse temprature - Partie 5: Feuilles dtanchit de toiture plastiques et lastomres Abdichtungsbahnen - Bestimmung des Verhaltens
5、beim Falzen bei tiefen Temperaturen - Teil 5: Kunststoff- und Elastomerbahnen fr Dachabdichtungen This European Standard was approved by CEN on 28 March 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard th
6、e 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 versions (English, Fren
7、ch, 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, Belgium, Bulgaria,
8、 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, Switzerland, Turkey
9、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. Ref. No. EN 495-
10、5:2013: EEN 495-5:2013 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle 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 DIN EN
11、495-5:2013-08 EN 495-5:2013 (E) 3 Foreword This document (EN 495-5:2013) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for 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
12、 an identical text or by endorsement, at the latest by November 2013, and conflicting national standards shall be withdrawn at the latest by November 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 n
13、ot be held responsible for identifying any or all such patent rights. This document supersedes EN 495-5:2000. This document has been technically and editorially revised in order to: add the possibility of instrumented apparatus; add precision data of a Round Robin test. This document has been prepar
14、ed under a mandate given to CEN by the European Commission and the European Free Trade Association. 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, C
15、yprus, 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 the Uni
16、ted Kingdom. DIN EN 495-5:2013-08 EN 495-5:2013 (E) 4 Introduction This European Standard is intended for characterisation of plastic and rubber sheets as manufactured or supplied before use. This test method relates to products or to their components where appropriate, and not to waterproofing memb
17、rane systems composed of such products and installed in the works. This test is intended to be used in conjunction with European Standards for plastic and rubber sheets for waterproofing. DIN EN 495-5:2013-08 EN 495-5:2013 (E) 5 1 Scope This European Standard specifies a method for the determination
18、 of the behaviour of plastic and rubber sheets for waterproofing to folding after exposure at a low temperature. 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 references, only the
19、edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13416, Flexible sheets for waterproofing Bitumen, plastic and rubber sheets for roof waterproofing Rules for sampling EN 1849-2, Flexible sheets for waterproofing Deter
20、mination 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 terms 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 bot
21、tom 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 excluding any surface profile Note 1 to entry: See EN 1849-2. DIN EN 495-5:2013-08 EN 495-5:2013 (E) 6 4 Principle The principle of the test is to
22、 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 apparatus 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
23、 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 instrumented apparatus with adjustable parallel plates. (See Figure 1 for examples of such apparatuses.) 5.2 Conditioning room Cold chamber with air
24、 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 Samples 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 long
25、itudinal (L) direction and two in the transversal (T) direction of the sheet for each temperature interval. NOTE For testing after artificial ageing, it is possible 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
26、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 Thickness Measure the overall thickness of each test specimen according to EN 1849-2. If the effective thickness is within the declared tol
27、erance, the declared thickness of the product or the measured thickness of the specimen can be used to adjust the plates. DIN EN 495-5:2013-08 EN 495-5:2013 (E) 7 Figure 1 - Example of folding apparatus DIN EN 495-5:2013-08 EN 495-5:2013 (E) 8 8.3 Looping Loop the test specimen lengthways and fix th
28、e 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 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
29、 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 four points as indicated in Figure 1. 8.5 Position of test specimen Place the looped test specimen in the apparatus with the taped
30、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 specified temperature. 8.6 Folding After 1 h exposure, close the folding apparatus within 1 s and maintain this position for minimum
31、 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 apparatus should not change more than 2 C within these 2 s. 8.7 Conditioning Remove the test specimen from the apparatus and allow wa
32、rming 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 Determination of cold folding temperature The folding procedure shall be repeated at 5 C steps. Fresh test specimens shall be used for each
33、 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 with backing are only tested in machine direction. If there is no uncoated area (e.g. testing of sheets after uses within a water
34、proofing 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 applying the step by step procedure described in 8.9, the cold folding temperature of the sheet is the lowest 5 C temperature step wher
35、e 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 types of PVC-p membranes were tested: a PES-reinforced 1,5 mm and a homogeneous bitumen compatible 1,5 mm DIN EN 495-5:2013-08 EN 4
36、95-5:2013 (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 test report shall at least include the following information: a) reference to this European Standard (EN 495-5) and any devi
37、ation 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 in 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). DIN EN 495-5:2013-08
