1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 1109:2013Flexible sheets forwaterproofing Bitumensheets for roof waterproofing Determination of flexibilityat low temperatureBS EN 1109:2013 BRITISH STANDARDNational forewo
2、rdThis British Standard is the UK implementation of EN 1109:2013. Itsupersedes BS EN 1109:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/546, Flexible sheets for waterproofing and watervapour control.A list of organizations represented on this c
3、ommittee 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 0 580 79935 8ICS 91.100
4、.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 31 May 2013.Amendments issued since publicationDate Text affectedBS EN 1109:2013EUROPEAN STANDARD NORME EUROPENN
5、E EUROPISCHE NORM EN 1109 April 2013 ICS 91.100.50 Supersedes EN 1109:1999English Version Flexible sheets for waterproofing - Bitumen sheets for roof waterproofing - Determination of flexibility at low temperature Feuilles souples dtanchit - Feuilles dtanchit de toiture bitumineuses - Dtermination d
6、e la souplesse basse temprature Abdichtungsbahnen - Bitumenbahnen fr Dachabdichtungen - Bestimmung des KaltbiegeverhaltensThis European Standard was approved by CEN on 14 March 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving t
7、his 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 application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official
8、 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Aus
9、tria, Belgium, Bulgaria, 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, Swed
10、en, Switzerland, Turkey 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 M
11、embers. Ref. No. EN 1109:2013: EBS EN 1109:2013EN 1109:2013 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Principle 5 5 Apparatus .6 6 Sampling .7 7 Preparation of test specimens .7 8 Procedure .7 8.1 Preparation of apparatus 7 8.2 Con
12、ditioning of test specimens .8 8.3 Flexibility at a specified temperature.8 8.4 Determination of cold bending temperature .8 9 Recording of results, evaluation and precision of test method .8 9.1 Result of flexibility at a specified temperature .8 9.2 Results when determining cold bending temperatur
13、e.8 9.3 Precision of the measuring method.9 9.3.1 General 9 9.3.2 Repeatability EN 1109:1999 9 9.3.3 Reproducibility EN 1109:1999 9 10 Test report 9 Bibliography . 10 BS EN 1109:2013EN 1109:2013 (E) 3 Foreword This document (EN 1109:2013) has been prepared by Technical Committee CEN/TC 254 “Flexible
14、 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 text or by endorsement, at the latest by October 2013, and conflicting national standards shall be withdrawn at the late
15、st by October 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 1109:1999. The significant change made
16、 since this previous version is: the change of the coolant to be used. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmar
17、k, 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 United Kingdom. BS EN 1109:2013E
18、N 1109:2013 (E) 4 Introduction This European Standard is intended for the characterisation and/or classification of bitumen sheets as manufactured or supplied before use. The test method relates exclusively to products, or to their components where appropriate, and not to waterproofing systems of su
19、ch products and installed in the works. This test is intended to be used in conjunctions within the relevant European products specifications for bitumen flexible sheets for waterproofing. The test for flexibility at a low temperature is intended to determine the susceptibility to cracking of the bi
20、tuminous coating on a sheet when bent under specified conditions. The test result is dependent on the type of coating, on the thickness of the sheet, type and position of the reinforcement and the behaviour of the surface material. The use of the test results directly to compare the performance of c
21、oatings in sheets of different composition is strictly limited because of the influence of parameters which have not been quantified. Only the results from sheets with the same composition can be used to compare the performance directly. The test primarily serves to characterise bitumen sheets. It c
22、an be used to evaluate the change in the cold bending behaviour during artificial ageing. It is not safe to relate the test results to the actual performance to be expected at low temperatures in service. Compared to EN 1109:1999, in this new version of EN 1109 one type of coolant is described, whic
23、h will give more reliable results. BS EN 1109:2013EN 1109:2013 (E) 5 1 Scope This European Standard specifies the determination of flexibility of bitumen sheets at low temperatures. The test can be carried out on the upper or lower face of the sheet either at a predetermined temperature or successiv
24、ely at different temperature steps to determine the cold bending temperature which represents a limiting temperature. Therefore, the test can be used to confirm a minimum cold bending temperature for a product or to determine the specific cold bending temperature for the product e.g. to determine th
25、e change of these properties as a result of artificial ageing. In the case of sheets with the same bituminous compound on both sides and where the reinforcement is placed in the cross section visually closer to the upper surface, the test is performed on the bottom face only. If the upper surface is
26、 covered with a non-woven (e.g. tissue, fleece etc.) or metal facing, the test is performed on the bottom side only. If the sheet on the upper surface is covered with permanent light surface protection and where the reinforcement is placed in the cross section visually closer to the upper surface, t
27、he test is performed on the bottom side only. 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 edition cited applies. For undated references, the latest edition o
28、f the referenced document (including any amendments) applies. EN 13416, Flexible sheets for waterproofing Bitumen, plastic and rubber sheets for roof waterproofing Rules for sampling 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 flexibility
29、 ability of bitumen sheet test specimens to be bent under specified conditions without cracking 3.2 cold bending temperature lowest temperature at which bitumen sheet test specimens can be bent around specified mandrel without cracking 3.3 crack fissure in the coating of the bitumen sheet extending
30、to the reinforcement or completely through unreinforced sheets 4 Principle The test specimens taken from the test sample are bent through an angle of 180 in a mechanical bending apparatus immersed in a coolant. After bending, the test specimens are examined for the presence of cracks in the coating.
31、 BS EN 1109:2013EN 1109:2013 (E) 6 5 Apparatus The construction and method of operation of the apparatus are shown in Figure 1. The apparatus consists of two non-rotating cylinders (20 0,1) mm in diameter and a cylindrical or semi-cylindrical bending mandrel (30 0,1) mm in diameter, capable of movin
32、g upwards and placed between them. The distance a between the cylinders is adjustable so that the distance between the cylinders and the bending mandrel can be adjusted to the thickness of the sheet. The bending part of the apparatus is immersed in a thermostatic bath, the temperature of which can b
33、e controlled between +20 C and 40 C to the nearest 0,5 C. The coolant used shall be down to -25C: a mixture of ethylene glycol (CH2OHCH2OH)/water (volume ratio 1:1); below 25 C: a mixture of ethanol/water (volume ratio 2:1). For elastomeric modified bitumen sheets, the mixture of ethanol/water (volu
34、me ratio 2:1) can be used at any temperature. To check the test temperature, an additional thermometer capable of measuring to 0,5 C is required; its thermo sensor shall be placed in the test medium at the same level as the test specimen. To position the test specimens in the test liquid so that the
35、y are flat and completely immersed for conditioning, suitable removable holding devices shall be used. The holding devices should be capable of taking at least five test specimens of a series. For the test, the bending mandrel is raised from below against the test specimen at a speed 360 mm/min so t
36、hat the test specimen is bent through an angle of 180. The electronic control system shall ensure that the travel speed is maintained at (360 40) mm/min at each phase of the bending process and at each temperature. Cracks are detected by visual inspection without any optical aids by the person carry
37、ing out the test. To permit an accurate assessment, the travel path is defined in such a way that the test specimen projects out of the coolant at the end of the procedure. The travel section shall be limited by suitably set limit switches. a) Beginning of bending BS EN 1109:2013EN 1109:2013 (E) 7 b
38、) End of bending Key 1 coolant 2 bending mandrel 3 fixed cylinder 4 thermosensor Figure 1 Principle of test apparatus and bending process 6 Sampling Test samples shall be taken in accordance with EN 13416. Rectangular test specimens with dimensions of (140 1) mm (50 1) mm as required by the tests de
39、scribed in 8.3 or 8.4 are taken from the test sample uniformly over the width of the sheet and with the larger dimension in the longitudinal direction of the sheet. The test specimens shall not be taken within approximately 150 mm of the edges of the sheet. The test specimens shall be numbered conse
40、cutively, beginning from one edge of the sheet, and the lower face of the sheet shall be marked. 7 Preparation of test specimens Any protective film/foil shall be removed, preferably by applying a self adhesive tape to it at ambient temperature, cooling the test specimen to approximately the presume
41、d cold bending temperature and then pulling the adhesive tape from the test specimen. Alternatively or additionally, the film can be removed by means of a compressed air jet (maximum pressure approximately 5 bar, nozzle diameter approximately 0,5 mm). It is not permitted to remove the film/foil usin
42、g heat (e.g. a gas flame). The test specimens shall then be conditioned prior to the test for at least 4 h at (23 2) C on a flat support so that they do not touch each other. There can be no adhesive connection with the support. Where necessary, a sheet of siliconised paper can be used. Loose surfac
43、e granules shall be removed before by hand by gentle tapping. 8 Procedure 8.1 Preparation of apparatus Prior to beginning the series of tests, the distance a (see Figure 1) between the cylinders shall be adjusted to the thickness of the test specimen so that it is approximately 32 mm plus twice the
44、thickness of the test specimen. The apparatus is then placed in the refrigerant bath so that the top of the cylinders is approximately 10 mm beneath the surface of the coolant. The bending mandrel is then in the bottom position. BS EN 1109:2013EN 1109:2013 (E) 8 8.2 Conditioning of test specimens Af
45、ter the specified test temperature in the coolant has been reached to the nearest 0,5 C, the test specimens are inserted into the holding device at the height of the cylinders so that coolant freely circulates around them. The test specimens are conditioned for 1 h 5 min in the coolant from the time
46、 when the temperature of the coolant is restored. The thermo sensor positioned approximately level with the test specimens is used for checking the temperature of the coolant. Then the test specimens are tested as described in 8.3 or 8.4. 8.3 Flexibility at a specified temperature Two series of five
47、 test specimens are conditioned as described in 8.2 at the specified test temperature, which is intended to be a whole number. One series will be used for testing the upper face, if applicable, and the other for the lower face. They are tested as follows. The test specimens are placed successively b
48、etween the bending mandrel and cylinders with the face to be tested uppermost. The bending mandrel is then set in motion pushing upwards against the test specimens at a speed of (360 40) mm/min so that the test specimens are bent uniformly around it. The travel shall stop (30 1) mm above the cylinde
49、rs (see Figure 1). The surface of the test specimens shall be projecting clearly out of the coolant, otherwise the fluid level shall be lowered accordingly. Within 10 s after the completion of the bending procedure, the test specimen, which is still kept between the bending mandrel, is examined under a suitable light source for any cracks using the naked eye without additional optical aids. A crack exists if one or more fissures in the coating extend to the reinforcement or completely through unreinforced sheets. All f
