1、 STD-BSI BS EN L23LL-L-ENGL 2000 - Lb24bb9 0838207 472 BRITISH STANDARD Flexible sheets for waterproofing - Determination of tensile properties - Part 1: Bitumen sheets for roof waterproofing The European Standard EN 12311-1:1999 has the status of a British Standard ICs 91.100.50 NO COPYING WITHOUT
2、BSI PERMISSION EXCEPT AS PERMITTED BY COPYBIGHT LAW BS EN 12311-1:2000 National foreword This British Standard is the official English language version of EN 12311-1:1999. The UK participation in its preparation was entrusted by Technical Committee B/W, Flexible sheets for waterproofing, to Subcommi
3、ttee B/546/1, Bitumen sheets, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible European committee any enquiries on the - monitor related intedonal and European developments and promulgate interpretation, or proposals for change, and keep the UK in
4、terests informed, them in the UK. A ist of organhalions represented on this subcommittee can be obtained on request to its secretaq? Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue
5、under the section entitled “Intedonal Standards Correspondence Index“, or by using the “Find“ facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct ap
6、plication Compliance with a British Standard does not of itself confer immunity from legai obligations. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright notice displayed in this document indicates when
7、the document Waslastissued. This British Standard, having been DRD of the sector Commitke for Bdding and Civil No* 1 Date Engineeruig, was published under the authority of the Standards Committee and comes into effect on 15 March 2000 Comt-nens 0 BSI 03-2000 ISBN O 580 35739 2 I I STD-BSI BS EN L23L
8、L-L-ENGL 2000 EUROPEAN STANDARD NORME EUROPENNE EUROPAISCHE NORM Lb24bb9 O838209 245 EN 1231 1-1 September 1999 ICs 91.100.50 English version Flexible sheets for waterproofing - Determination of tensile properties - Part 1 : Bitumen sheets for roof waterproofing Feuilles souples dtanchit - Dterminat
9、ion des proprits en traction - Partie 1 : Feuilles dtanchit de toiture bitumineuses Abdichtungsbahnen - Bestimmung des Zug- Dehnungsverhaltens - Teil 1: Bitumenbahnen fr Dachabdichtungen This European Standard was approved by CEN on 21 August 1999. CEN members are bound to comply with the CENICENELE
10、C 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 sich national standards may be obtained on application to the Central Secretariat or to any CEN
11、 member. This European Standard exists in three official versions (English, French, German). A version in any other language made by tmislation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as he official versions. CEN memb
12、ers are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEEN DE NORMALISAT
13、ION EUROPISCHES KOMITEE FUR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels 1999 CEN All rights of exploitation in any fomi and by any means reserved worldwide for CEN national Members. Ref. No. EN 12311-1:1999 E Page 2 EN 1231 1-1 :I999 Contents Foreword Introduction I Scope 2 Norm
14、ative references 3 Definitions 4 Principle 5 Apparatus 6 Sampling 7 Preparation of test specimens 8 Procedu re 9 10 Test report Expression of results, evaluation and precision of test method Page 3 3 3 3 3 4 4 4 4 4 5 5 O BSI 03-2000 STD=BSI BS EN L23LL-L-ENGL 2000 Lb24bb9 08382LL 9T3 M Page 3 EN 12
15、311-1:1999 Foreword This European Standard has been prepared by Technical Committee CENTTC 254, Flexible sheets for waterproofing, the Secretariat of which is held by BSI. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endors
16、ement, at the latest by March 2000, and conflicting national standards shall be withdrawn at the latest by September 2001. According to the CENICENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgiu
17、m, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Introduction This European Standard is intended for the characterization of bitumen sheets as manufactured or supplied
18、before use. The test method relates exclusiveiy 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 on product characteristics on
19、 reinforced and unreinforced bitumen sheets for roof waterproofing. 1 Scope This European Standard specifies a method for the determination of the tensile properties of bitumen sheets for roofing. 2 Normative references This European Standard incorporates by dated or undated reference, provisions fr
20、om 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 amendm
21、ent or revision. For undated references the latest edition of the publication referred to applies. ENl0002-2, Metallic materials - Tensile testing - Part 2: Verification of the force of measuring system of the tensile testing machines. 3 Definitions For the purposes of this standard the definitions
22、indicated in 3.1 to 3.3 and in the corresponding European Standard on product specifications apply. 3.1 maximum tensile force the largest value of tensile force occurring during testing 3.2 elongation at maximum tensile force elongation of the test specimen occurring at the maximum tensile force 3.3
23、 gauge length the initial test length, .e. the distance between the grips or extensometer measuring points O BSI 03-2000 STDOBSI BS EN LZ3LL-L-ENGL 2000 Lb24bb9 0838232 837 M Page 4 EN 12311-1:1999 4 Principle A test specimen is stretched at a constant rate of extension until it ruptures. The tensil
24、e force and the corresponding change in length of the specimen is continuously recorded throughout the test. 5 Apparatus Tensile testing machine equipped with a continuous recording of force and corresponding distance, capable of maintaining a uniform rate of grip separation as specified below. The
25、tensile testing machine shall have a sufficient loading capacity (at least 2 O00 N) and a grip separation speed of (1 O0 f 1 O) mm per min. The width of grips shall not be less than 50 mm. The tensile testing machine shall be provided with a type of grip which maintains or increases the gripping pre
26、ssure as a function of the increase of the force applied to the specimen and capable of holding the test specimen in such a manner that slip relative to the grips is limited to a maximum of 1 mm for products up to 3 mm thick, and 2 mm for thicker products. The method of gripping shall not induce pre
27、mature failure at or in the grips. To prevent the slippage from the grips exceeding the stated limits, it will be permitted to use cooled grips. Alternatively the actual elongation of the test specimen can be measured with an extensometer. The force measuring system shall meet at least class 2 in ac
28、cordance with ENI 0002-2 (.e. 12 %). 6 Sampling Test samples shall be taken in accordance with the corresponding European Standard. 7 Preparation of test specimens For a complete tensile test, two sets of test specimens are to be prepared: a set of five for the longitudinal direction and a set of fi
29、ve for the transverse direction. Test specimens are to be cut at random from a test piece not closer than 100 mm from the edge of the sheet, with the aid of a template, or die cutter, to provide the rectangular test specimens measuring (50 f 0,5) mm wide by a length of at least (200 mm + 2 x grippin
30、g length), the longer direction being the test direction. Any non-permanent surface layer should be removed. The test specimens are to be conditioned for at least 20 h at (23 f 2) OC and relative humidity in the range 30 % to 70 % before testing. 8 Procedure The test specimen is to be tightly clampe
31、d in the tensile test machine grips, taking care that the longitudinal axis of the test specimen and the axis of the testing machine and grips are correctly aligned. The clear distance between grips shall be (200 f 2) mm. Mark the test specimens in such a way that any slippage from the grips can be
32、identified. Where an extensometer is used, this shall be set at a gauge length of (180 i 2) mm before the test. A preload of maximum 5 N before the start of the test is recommended to take out any slack in the test specimen. The test shall be carried out at (23 f 2) OC with a constant speed of grip
33、separation of (100 f 10) mm per minute. The tensile force and the corresponding distance of separation of the grips (or extensometer) shall be recorded. O BSI 03-2000 STD-BSI BS EN 12311-1-ENGL 2000 = 1624bb9 0838213 776 Page 5 EN 12311-1:1999 9 Expression of results, evaluation and precision of tes
34、t method 9.1 Evaluation Determine from the force and distance recorder, or from the data registered, the maximum force and the corresponding elongation calculated from the separation of the tensile testing machine grips (or extensometer) and expressed as a percentage of the original gauge length. Di
35、sregard any test result where the test specimen breaks within 10 mm from the grips or when it slips by more than the permitted limit within the grips of the tensile testing machine, and retest with a replacement test specimen. The maximum tensile force, expressed in NAOmm, and corresponding elongati
36、on in percent are noted, together with direction of the test specimen. List the individual values of tensile force in and elongation in percent for the five test specimens, in each direction. Calculate the mean value. The mean values of tensile force shall be rounded to the nearest 5 N and mean valu
37、es of elongation shall be rounded to the nearest 1 %. In the case of sheets with composite reinforcements which give rise to two or more distinct peaks on the forcelelongation curve, the force and elongation of the two greatest peaks shall be recorded. 9.2 Precision of the test method The precision
38、of the test method is not specified 10 Test report The test report shall include at least the following information: a) all details necessary to identi the product tested; b) a reference to this European Standard (EN 1231 1-1) and any deviation from it; c) infomation of sampling in accordance with c
39、lause 6; d) details of preparation of the test specimens in accordance with clause 7; e) the test results in accordance with 9.1 ; 9 the date of the test. O BSI 03-2000 BS EN 12311-1:2000 BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution BSI is the independent national bod
40、y responsible for preparing British Standards. It presents the UK view on standads in Europe and at the intedonal level. It is incorporated by Royal Charter. Revisions British Standards are updated by amendment or revision Users of British Stan- should make sure that they possess the latest amendmen
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