1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12316-2:2013Flexible sheets forwaterproofing Determination of peelresistance of jointsPart 2: Plastic and rubber sheets for roofwaterproofingBS EN 12316-2:2013 BRITISH STAN
2、DARDNational forewordThis British Standard is the UK implementation of EN 12316-2:2013.It supersedes BS EN 12316-2:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/546, Flexible sheets for waterproofing and watervapour control.A list of organizati
3、ons 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 97
4、8 0 580 80228 7ICS 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 12316-2:2013EUR
5、OPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12316-2 June 2013 ICS 91.100.50 Supersedes EN 12316-2:2000English Version Flexible sheets for waterproofing - Determination of peel resistance of joints - Part 2: Plastic and rubber sheets for roof waterproofing Feuilles souples dtanchit - Dterminati
6、on de la rsistance au pelage des joints - Partie 2 : Feuilles dtanchit de toiture plastiques et lastomres Abdichtungsbahnen - Bestimmung des Schlwiderstandes der Fgenhte - Teil 2: Kunststoff- und Elastomerbahnen fr Dachabdichtungen This European Standard was approved by CEN on 28 March 2013. CEN mem
7、bers 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 applicat
8、ion 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-CENELEC Manage
9、ment 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, Latvia,
10、 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, B-1000 B
11、russels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 12316-2:2013: EBS EN 12316-2:2013EN 12316-2:2013 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle
12、5 5 Apparatus .5 6 Sampling .6 7 Preparation of test pieces and test specimens 7 8 Procedure .7 9 Expression of results 8 10 Test report 9 BS EN 12316-2:2013EN 12316-2:2013 (E) 3 Foreword This document (EN 12316-2:2013) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for waterpr
13、oofing”, 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 December 2013, and conflicting national standards shall be withdrawn at the latest by December 201
14、3. 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 has been prepared under a mandate given to CEN by the European Commis
15、sion and the European Free Trade Association. This document supersedes EN 12316-2:2000. This document has been technically and editorially revised to include the following: introduction of failure modes and how to handle results with different modes; estimation of precision. According to the CEN-CEN
16、ELEC 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 of Macedonia, France, Germany, Greece, Hungary, I
17、celand, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 12316-2:2013EN 12316-2:2013 (E) 4 Introduction This European Standard is intended for characterisation of
18、 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 membrane systems composed of such products and installed in the works. This test is intended to be used in conjunction with Euro
19、pean Standards for plastic and rubber sheets for waterproofing. BS EN 12316-2:2013EN 12316-2:2013 (E) 5 1 Scope This European Standard specifies a method for determining the resistance to peeling of joints between two adjacent sheets of the same plastic or rubber sheets for waterproofing. This test
20、method will be used mainly for testing the joints in mechanically fastened plastic or rubber sheets for waterproofing. The peel strength characterises the optimum joint strength which can be reached for a membrane and a joint technique under laboratory conditions. On roofs the joint strength could b
21、e clearly reduced due to the non-optimal conditions (e.g. pressure, temperature, humidity, pollution, workmanship). The requirement for the joint technique at the site is to ensure a permanently tight joint. 2 Normative references The following documents, in whole or in part, are normatively referen
22、ced 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 ISO 7500-1, Metallic materials Verification of static uniaxial testing ma
23、chines Part 1: Tension/ compression testing machines Verification and calibration of the force-measuring system (ISO 7500-1) EN 13416, Flexible sheets for waterproofing Bitumen, plastic and rubber sheets for roof waterproofing Rules for sampling 3 Terms and definitions For the purpose of this docume
24、nt, the following terms and definitions apply. 3.1 peel resistance tensile force required to completely separate a prepared joint test specimen by peeling 4 Principle The principle of the test is to pull a test specimen to peel a joint at a constant speed until it breaks. The tensile force is contin
25、uously recorded throughout the test. 5 Apparatus Tensile testing machine equipped with a continuous recording of force and corresponding extension and capable of maintaining uniform speed of grip separation as specified below. Tensile testing machine shall have a sufficient loading capacity and a gr
26、ip separation speed of (100 10) mm/min. The width of grips shall not be less than 50 mm. The tensile testing machine shall be equipped with grips of a type which maintain or increase the clamping pressure as a function of the increase of the force applied to the test specimen. The test specimen shal
27、l be held so that it does not slip in the grips more than 2 mm. BS EN 12316-2:2013EN 12316-2:2013 (E) 6 The method of gripping shall not induce premature rupture close to the grips. The force measuring system shall meet at least Class 2 of EN ISO 7500-1 (i.e. 2%). 6 Sampling Samples shall be taken i
28、n accordance with EN 13416. Dimensions in millimetres Key w width of joint Figure 1 - Preparation of specimen from specially made side and end laps Dimensions in millimetres Key 1 grip w width of joint Figure 2 - Peel strength testing of side and end laps BS EN 12316-2:2013EN 12316-2:2013 (E) 7 7 Pr
29、eparation of test pieces and test specimens Test pieces of the sheet are joined by the method(s) to be used for installation as recommended by the manufacturer. After jointing, the test piece shall be conditioned for a minimum of 16 h at (23 2) C before testing unless the manufacturer recommends dif
30、ferently. From each of these joint test pieces, five rectangular test specimens (50 1) mm wide shall be cut, perpendicular to the joint (see Figure 1). They shall have such a length, that the ends of the specimen fill the grips and that the complete overlap can be tested perpendicular to joint (see
31、Figure 2). Rectangular joint test specimens shall be prepared representing all possibilities of jointing according to the way(s) to be used for installation. The number of specimens tested is five per set. 8 Procedure The test specimen shall be firmly held in the grips of the tensile testing machine
32、, taking care that the longitudinal axis of the test specimen, the axis of the tensile testing machine and the grips are correctly aligned. The clear distance between the grips shall be (100 5) mm (see Figure 2). No preload will be applied. The test is carried out on a test specimen at a temperature
33、 of (23 2) C and at a constant separating speed for the grips of (100 10) mm/min. The applied force and extension shall be recorded continuously until the test specimen separates. The mode of failure of the joint shall be recorded. The modes of failure are classified in three classes A, B, C or comb
34、inations of them (see Figure 3). A - Peeling of the joint B - Break outside of the joint BS EN 12316-2:2013EN 12316-2:2013 (E) 8 C - Delamination of sheet. In this case the area of delamination has to be more than 5 % of the joint area. Figure 3 Mode of failure 9 Expression of results 9.1 Jointing i
35、nformation State all relevant information on the formation and the conditioning of the joint. 9.2 Evaluation 9.2.1 General A force extension graph shall be drawn up. Disregard any test result where the test specimen breaks less than 10 mm from the grips or slips by more than the permitted limit with
36、in the grips of the tensile testing machine, and retest with a replacement specimen. The mode of failure of each specimen has to be reported in accordance to Clause 8. An average of all specimens can only be calculated if the failure mode is identical for all specimens. If different failure modes oc
37、cur, only evaluation in accordance to the main failure mode has to be reported. 9.2.2 Maximum peel resistance If a majority of the specimens do not show failure mode A (i.e. a majority of the specimens show either failure mode B or C or combination of both) and the maximum force detected is more tha
38、n 100 N/50 mm, then the maximum peel resistance has to be evaluated. In this case, no value for the resistance should be reported. Only the classification “no failure of the joint” has to be reported. This is the best possible joint. This evaluation applies if, for a majority of the specimens, “no f
39、ailure of the joint” occurs. 9.2.3 Average peel resistance (relevant only if peel fully occurs) If a majority of the specimens show failure mode A, then the average peel resistance has to be evaluated. At least the first and last quarter of the graph shall not be included when calculating the averag
40、e peel resistance of the test specimen. An average value of the force is calculated on the remaining section by determination of ten equidistant values and is expressed as N/50 mm (see Figure 4). BS EN 12316-2:2013EN 12316-2:2013 (E) 9 Key 1 maximum peel force a points to be evaluated Y force axis X
41、 extension axis Figure 4 - Graph for calculating the peel resistance (example) The purpose of the evaluation method specified here is to calculate an average peel resistance value, which corresponds to the mean value of the forces acting on the test specimen at certain specified times during testing
42、. This method also permits an evaluation to be carried out if the graphs do not feature any distinctive peaks. This can occur when testing some bonded materials. It should be noted that the results could vary, depending on the direction in which the test specimens are taken. 9.3 Calculations If a ma
43、jority of the specimens show failure mode A then calculate the results for specimens with failure mode A, the peel resistance as the mean (using the maximum or average peel force as occurs for each specimen) expressed in N/50 mm. State the peel resistance to the nearest Newton with the corresponding
44、 standard deviation. If the maximum peel resistance is evaluated, no calculation is needed. 9.4 Precision of the test method As estimated by accredited laboratories the scattering due to the uncertainty in measurement based on a single value evaluation (force, width) is about 10 %. 10 Test report Th
45、e test report shall include the following information: a) reference to this European Standard (EN 12316-2) and any deviation from it; b) all details necessary to identify the product tested; c) information on sampling in accordance with Clause 6; d) details of preparation of the test specimen in acc
46、ordance with Clause 7; BS EN 12316-2:2013EN 12316-2:2013 (E) 10 e) test results in accordance with Clause 9 including the mode of failure for each specimen and either the average peel resistance or for maximum peel resistance the classification “no failure of the joint” has to be reported; f) any pe
47、culiarities in the method employed or encountered during the test; g) date of the test(s). This page deliberately left blankBSI is the independent national body responsible for preparing British Standards and other standards-related publications, information and services. It presents the UK view on
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