1、August 2013 Translation by DIN-Sprachendienst.English price group 7No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS
2、91.100.50!%nX“2047553www.din.deDDIN EN 1844Flexible sheets for waterproofing Determination of resistance to ozone Plastic and rubber sheets for roof waterproofing;English version EN 1844:2013,English translation of DIN EN 1844:2013-08Abdichtungsbahnen Verhalten bei Ozonbeanspruchung Kunststoff- und
3、Elastomerbahnen fr Dachabdichtungen;Englische Fassung EN 1844:2013,Englische bersetzung von DIN EN 1844:2013-08Feuilles souples dtanchit Dtermination de la rsistance lozone Feuilles dtanchit de toiture plastiques et lastomres;Version anglaise EN 1844:2013,Traduction anglaise de DIN EN 1844:2013-08Su
4、persedesDIN EN 1844:2001-12www.beuth.deDocument comprises 11 pagesIn case of doubt, the German-language original shall be considered authoritative.07.13DIN EN 1844:2013-08 2 National foreword This document (EN 1844:2013) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for waterp
5、roofing” (Secretariat: NEN, Netherlands). The responsible German body involved in its preparation was the Normenausschuss Kunststoffe (Plastics Standards Committee), Working Committee NA 054-04-03 AA Baubahnen. The DIN Standards corresponding to the International Standards referred to in this docume
6、nt are as follows: ISO 1431-1 DIN ISO 1431-1 Amendments This standard differs from DIN EN 1844:2001-12 as follows: a) Clause 7 “Conditioning” has been revised; b) Subclause 8.5 “Elongation” has been revised; c) the standard has been editorially revised. Previous editions DIN EN 1844: 2001-12 Nationa
7、l Annex NA (informative) Bibliography DIN ISO 1431-1, Rubber, vulcanized or thermoplastic Resistance to ozone cracking Part 1: Static and dynamic strain testing A comma is used as the decimal marker. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1844 May 2013 ICS 91.100.50 Supersedes EN 1844:
8、2001English Version Flexible sheets for waterproofing - Determination of resistance to ozone - Plastic and rubber sheets for roof waterproofing Feuilles souples dtanchit - Dtermination de la rsistance lozone - Feuilles dtanchit de toiture plastiques et lastomres Abdichtungsbahnen - Verhalten bei Ozo
9、nbeanspruchung - 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 the status of a national standa
10、rd 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 version in any
11、 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, Cyprus, Czech Repub
12、lic, 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 Kingdom. EUROPEAN
13、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 1844:2013: EEN 1844:2013 (E) 2 Co
14、ntents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Principle 5 4 Apparatus .5 5 Sampling .5 6 Test specimens 5 7 Conditioning .6 8 Test conditions 6 9 Procedure .7 10 Expression of results 7 11 Precision of test method .7 12 Test report 8 Bibliography 9 DIN EN 1844:2013-08 E
15、N 1844:2013 (E) 3 Foreword This document (EN 1844:2013) 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 an identical tex
16、t 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 not be held respon
17、sible for identifying any or all such patent rights. This document supersedes EN 1844:2001. This document has been technically and editorially revised in order to correct the ozone concentration. This document has been prepared under a mandate given to CEN by the European Commission and the European
18、 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic
19、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 United Kingdom. DIN EN 1844:2013-08 EN 1844:2013 (E) 4 Introduction This Europ
20、ean Standard is intended for characterisation of plastic and rubber sheets as manufactured or supplied before use. This test method relates exclusively to products or to their components where appropriate, and not to waterproofing membrane systems composed of such products and installed in the works
21、. This test is intended to be used in conjunction with European Standards for plastic and rubber sheets for waterproofing. DIN EN 1844:2013-08 EN 1844:2013 (E) 5 1 Scope This European Standard specifies a method for the determination of the resistance of plastic and rubber sheets for waterproofing t
22、o cracking when exposed, under static tensile strain, to air containing a definite concentration of ozone and at a definite temperature without the effects of direct light. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indisp
23、ensable 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 for waterproofing Bitumen, plastic and rubber sheets for roof waterproofing Rules for
24、 sampling ISO 1431-1, Rubber, vulcanized or thermoplastic Resistance to ozone cracking Part 1: Static and dynamic strain testing 3 Principle Test specimens are exposed under elongation in a closed chamber, at a defined relative humidity and temperature, to an atmosphere containing ozone. After expos
25、ure, the presence or absence of cracks is determined. 4 Apparatus The apparatus used shall be in accordance with ISO 1431-1. The test chamber shall also be controlled for relative humidity. 5 Sampling Samples shall be taken in accordance with EN 13416. 6 Test specimens Test specimens shall have an u
26、ndamaged test surface. Ozone resistance shall not be assessed on surfaces that have been cut or buffed. Comparisons of different materials are only valid if the cracking is assessed on surfaces of similar finish produced by the same method. Test specimens shall consist of strips of not less than 10
27、mm width and length not less than 40 mm between the grips before stretching; the thickness is equal to the thickness of the sheets. The ends of the test specimen held in the grips may be protected with an ozone resistant lacquer. Care shall be taken in selecting a lacquer to ensure that the solvent
28、used does not appreciably swell the membrane. Silicone grease shall be used. Alternatively, the test specimen may be provided with modified ends, for example by the use of lugs, to enable it to be extended without causing excessive stress concentration and breakage at the grips during ozone exposure
29、. At least three test specimens shall be used. DIN EN 1844:2013-08 EN 1844:2013 (E) 6 7 Conditioning 7.1 Conditioning in the unstrained state For all test purposes, the minimum time between manufacturing of the finished product and straining the test specimens shall be 16 hours. For non-product test
30、, the maximum time between manufacturing of the finished product and straining the test specimens shall be 4 weeks. For product tests, wherever possible, the time between manufacturing of the finished product and straining the test specimens shall not be more than 3 months. In other cases, tests sha
31、ll be made within 2 months of the date of the receipt of the product by the customer. Test specimens and samples shall not, between the time of manufacturing of finished product and insertion in the cabinet, be allowed to come into contact with membranes of a different composition. This is necessary
32、 to prevent additives, which may affect the development of ozone cracks from migrating by diffusion from one membrane to adjacent membranes. It is recommended that aluminium foil is placed between test specimens and sheets of different compositions, but any other method, which prevents migration of
33、additives, can be used. Samples and test specimens shall be stored in the dark, in an essentially ozone-free atmosphere during the period between manufacturing of the finished product and stretching. The normal storage temperature in accordance to ISO 23529 should be the standard temperature of (23
34、2) C. These storage conditions should be used, as far as possible, for products. For evaluations intended to be comparable, the storage time and conditions shall be identical. For thermoplastic rubbers, the storage period shall begin immediately after shaping. 7.2 Conditioning in the strained state
35、After stretching, the test specimens shall be conditioned for a period between 48 h and 96 h in an essentially ozone-free atmosphere in the dark. The temperature for this conditioning shall be the standard temperature of (23 2) C. The test specimens shall not be touched or otherwise disturbed in any
36、 way during the conditioning period. For tests to be comparable, the conditioning time shall be the same. 8 Test conditions 8.1 Ozone concentration The test shall be carried out at an ozone concentration of (200 20) pphm by volume. NOTE It has been found that differences in atmospheric pressure can
37、influence ozone cracking when test pieces are exposed to constant ozone concentrations expressed in parts per million. This effect can be taken into account by expressing the ozone content in the ozonised air in terms of the partial pressure of ozone, i.e. in millipascals, and making comparisons at
38、constant ozone partial pressures. At standard conditions of atmospheric pressure and temperature (101 kPa, 273 K), a concentration of 1 pphm is equivalent to a partial pressure of about 1 mPa. Further guidance is given in ISO 1431-1. 8.2 Temperature The test shall be carried out at a temperature of
39、(40 2) C. DIN EN 1844:2013-08 EN 1844:2013 (E) 7 8.3 Relative humidity The test shall be carried out at a relative humidity of (65 5) %. 8.4 Exposure time Place the strained test pieces, suitably conditioned, in the ozone chamber for (168 2) h. 8.5 Elongation The test shall be carried out with test
40、specimens stretched to an elongation of (20 2) %. In the case of reinforced finished product, there may be difficulty in achieving the required/specified elongation due to deformation in the test specimen or restriction in reinforcement movement. In the case of reinforced sheeting, the test specimen
41、s can be skived or cut, but not buffed, to remove the reinforcement, or moulded without the reinforcement. One of the following methods is recommended to produce a suitable test specimen: a) When using a test specimen from the reinforced finished product, stretch the test specimen in an appropriate
42、direction, maybe diagonally, in order to achieve the required/specified elongation. b) Carefully remove the reinforcement without damaging the elastomeric surface. 9 Procedure Strain the test specimens at 20 % elongation and condition them in accordance with 7.2. Adjust the rate of flow and temperat
43、ure of the ionised gas and its ozone concentration to that required and place the strained test specimen in the test chamber. Maintain the test conditions at the required levels. The lens may either be mounted in a window in the chamber wall, or the test specimens may be removed from the chamber for
44、 a short period, in their clamps. The test specimens shall not be handled or bumped when carrying out the examination. Finally examine the test specimen after a (168 2) h exposure period. NOTE Cracks propagating from edges that originate from the preparation by the punching die are to be ignored. 10
45、 Expression of results Report the results as no cracking or cracking. 11 Precision of test method No information is available at this time. DIN EN 1844:2013-08 EN 1844:2013 (E) 8 12 Test report The test report shall contain at least the following information: a) reference to this European Standard (
46、EN 1844); b) all details necessary to identify the product tested; c) number of test specimens tested; d) method of preparation of test pieces; e) whether a rotating carrier was used; f) air flow rate; g) whether cracking occurred; if required, the nature of the cracking may also be given; h) any no
47、n-standard procedures or any peculiarities encountered during testing; i) date(s) of testing. DIN EN 1844:2013-08 EN 1844:2013 (E) 9 Bibliography 1 ISO 1431-3, Rubber, vulcanized or thermoplastic Resistance to ozone cracking Part 3: Reference and alternative methods for determining the ozone concentration in laboratory test chambers 2 ISO 23529, Rubber General procedures for preparing and conditioning test pieces for physical test methods DIN EN 1844:2013-08
