1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 15812:2011Polymer modifiedbituminous thick coatingsfor waterproofing Determination of crackbridging abilityBS EN 15812:2011 BRITISH STANDARDNational forewordThis British St
2、andard is the UK implementation of EN 15812:2011. The UK participation in its preparation was entrusted to TechnicalCommittee B/546, Flexible sheets for waterproofing and water vapour control.A list of organizations represented on this committee can be obtained on request to its secretary.This publi
3、cation does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. BSI 2011 ISBN 978 0 580 62263 2 ICS 91.100.50 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under t
4、he authority of the Standards Policy and Strategy Committee on 31 August 2011.Amendments issued since publicationDate T e x t a f f e c t e dBS EN 15812:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 15812 March 2011 ICS 91.100.50 English Version Polymer modified bituminous thick coatings
5、for waterproofing - Determination of crack bridging ability Revtements bitumineux pais modifis aux polymres pour impermabilisation - Dtermination de laptitude ponter les fissures Kunststoffmodifizierte Bitumendickbeschichtungen zur Bauwerksabdichtung - Bestimmung des Rissberbrckungsvermgens This Eur
6、opean Standard was approved by CEN on 13 February 2011. 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 standard without any alteration. Up-to-date lists and bibliographical references
7、 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 other language made by translation under the responsibility of a CEN memb
8、er 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 Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland,
9、 Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Mar
10、nix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15812:2011: EBS EN 15812:2011EN 15812:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 45 Apparat
11、us .46 Sampling .57 Test specimens 57.1 General 57.2 Method A .57.2.1 Substrate 57.2.2 Coating 57.2.3 Conditioning of test specimens .57.2.4 Processing bending test (method A) .57.3 Method B .67.3.1 Substrate 67.3.2 Coating 77.3.3 Conditioning of test specimens .77.3.4 Processing tensile test (metho
12、d B)78 Procedure .89 Expression of results and precision 89.1 Expression of results 89.2 Precision .810 Test report 9BS EN 15812:2011EN 15812:2011 (E) 3 Foreword This document (EN 15812:2011) has been prepared by Technical Committee CEN/TC 361 “Project Committee Polymer modified bituminous thick coa
13、tings for waterproofing Definitions/requirements and test methods”, the secretariat of which is held by DIN. 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 September 2011, and conflicting nationa
14、l standards shall be withdrawn at the latest by September 2011. 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. According to the CEN/C
15、ENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithu
16、ania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. BS EN 15812:2011EN 15812:2011 (E) 4 1 Scope This European Standard specifies two methods (method A and method B) for determining the crack bridge properties of
17、polymer modified bituminous thick coatings for waterproofing. The two test methods may be applied equally. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, t
18、he latest edition of the referenced document (including any amendments) applies. EN 1062-7:2004, Paints and varnishes Coating materials and coating systems for exterior masonry and concrete Part 7: Determination of crack bridging properties EN 1766:2000, Products and systems for the protection and r
19、epair of concrete structures Test methods Reference concretes for testing FprEN 15814:2011, Polymer modified bituminous thick coatings for waterproofing Definitions and requirements ISO 554, Standard atmospheres for conditioning and/or testing Specifications 3 Terms and definitions For the purposes
20、of this document, the terms and definitions given in FprEN 15814:2011 and the following apply. 3.1 crack bridge ability ability of a product to bridge a crack under specified conditions and without damage 4 Principle After coating the substrate, a defined crack is made in the substrate at a nominal
21、crack point. The applied bitumen coating is stretched over this crack. The mechanical stress is applied to the bitumen coating. The crack width is continuously enlarged with defined speed. The measurement is finished, when a failure in the bitumen coating occurs or when the required crack width is r
22、eached. The required crack width is kept constant for a period of 24 h. After that period a visual judgement is made. The crack-bridging properties are determined at a specified temperature. Two different test methods can be applied: The bending test (method A) or the tensile test (method B). 5 Appa
23、ratus The test apparatus shall ensure that the movement of the cracks lies between given limits, and that shearing (horizontal and vertical movement) of the crack is avoided during the measurement. It shall be provided with a device for maintaining the temperature at which the determination of the c
24、rack-bridging properties is to be carried out (normally 4 C). The tolerance of the test temperature shall be 1 C. BS EN 15812:2011EN 15812:2011 (E) 5 6 Sampling The specimen preparation is to be made in accordance with the manufacturer instruction. Usually the preparation is accomplished at room tem
25、perature. 7 Test specimens 7.1 General Take at least 2 test specimens. 7.2 Method A 7.2.1 Substrate 7.2.1.1 Dimensions The test piece is a reinforced concrete slab measuring 300 mm 200 mm 40 mm. 7.2.1.2 Fabrication and storage Concrete slabs are fabricated and stored according to EN 1766:2000, 6.3 t
26、o 6.5, Type MC 0,45, with a maximum aggregate size of 8 mm. For details see EN 1062-7:2004, Figures C.5 and C.6. The surface of the concrete slab has to be free of substances that may influence the bonding. After curing process according to EN 1766 the concrete slabs have to be stored at least 7 day
27、s in a normal climate of (23 2) C and a relative humidity of (50 5) % in accordance with ISO 554 before they are coated. 7.2.2 Coating The concrete slabs have to be coated in accordance with the manufacturers instructions, with a width of 150 mm on the whole length of the slab. At the edges on the l
28、ong sides of the surface of the slab a strip of 25 mm width is not coated for detecting cracks during the crack-bridging test. The test pieces are cured and stored in a climate according to the manufacturers instructions (normally (23 2) C and a relative humidity of (50 5) % in accordance with ISO 5
29、54). The thickness of the wet layer has to be applied that after the drying process the required dry layer thickness is achieved with a permitted tolerance of 10 %. The dry layer thickness should be the minimum possible thickness, but at least 3 mm. To provide the designated dry layer thickness the
30、wet coating has to be levelled off with the help of a frame or gauge of accordant height. 7.2.3 Conditioning of test specimens The test specimen are then subjected to conditioning in a normal climate of (23 2) C and a relative humidity of (50 2) % for 28 days. After than the test specimens shall be
31、conditioned under 4 C 1 K for 12 h before testing. 7.2.4 Processing bending test (method A) The tear bridging is tested in a distance or deformation controlled bending tension machine at a temperature of 4C 1 K according to the load arrangement shown in EN 1062-7:2004, Figure C.6. Then the test can
32、be started with the speed of 0,1 mm/min according to the requirement and till the necessary crack wide is reached. BS EN 15812:2011EN 15812:2011 (E) 6 The crack width of 2 mm has to be controlled with applicative devices for measuring or sensors fixed on both sides of the slab. 7.3 Method B 7.3.1 Su
33、bstrate 7.3.1.1 Dimensions The test piece is a concrete slab deviating from EN 1062-7:2004, Figure C.10, with a size of 150 mm 150 mm 40 mm. 7.3.1.2 Fabrication and storage Concrete slabs are fabricated according to EN 1766:2000, 6.3 to 6.5, Type MC 0,45, using a test concrete with the following spe
34、cifications: test pieces according to EN 1062-7:2004, Figure C.10, but with deviated size (see 7.3.1.1); devoid of the notch; instead of two fasteners on each side of the slab one tie-rod may be used in the middle of the both sides according to Figure 1. BS EN 15812:2011EN 15812:2011 (E) 7 Dimension
35、s in millimetres Key 1 tie - rod, round steel with a of 10 mm to 15 mm 2 steel rod, round steel with a of 8 mm to 12 mm 3 steel tube suitable for the round steel 4 plastic spacer Figure 1 Tensile test with one tie-rod on both sides The surface of the concrete slabs has to be free of substances that
36、may influence the bonding. After storage according to EN 1766 the concrete slabs have to be stored at least 7 days in normal climate of (23 2) C and a relative humidity of (50 2) % before they are coated. 7.3.2 Coating The concrete slabs are coated over an area of 120 mm 120 mm. The thickness of the
37、 wet layer has to be applied that after the drying process the required dry layer thickness is achieved with a permitted tolerance of 10 %. The dry layer thickness should be the minimum possible thickness, but at least 3 mm. To provide the designated dry layer thickness the wet coating has to be lev
38、elled off with the help of a frame or gauge of accordant height. 7.3.3 Conditioning of test specimens The test specimen are then subjected to conditioning in a climate (23 2) C and a relative humidity of (50 5) % for 28 days. After than the test specimens shall be conditioned under (4 1) C for 12 h
39、before testing. 7.3.4 Processing tensile test (method B) Both stainless steels are removed for cleaning from concrete and replaced back into the tubes. Outside the slab they are fixed e.g. with a piece of rubber, to keep them in the right position. BS EN 15812:2011EN 15812:2011 (E) 8 Than the test p
40、iece is attached to the test machine by locating the tie rods on both sides of the concrete slab into the brackets of the machine. The tie rods are fixed with nuts. The crack width of 2 mm has to be controlled with applicative devices for measuring or sensors fixed on both sides of the slab. The tes
41、t piece is so positioned that the coated surface can be seen. Now the test can be started with the speed of 0,1 mm/min according to the requirements until the necessary crack width is reached. 8 Procedure After the crack width is reached, the test apparatus is kept in this position for 24 h with the
42、 same temperature used during the test. Afterwards the coating is checked for damages on the surface visually. Changes of any kind (incipient, partial or through thickness cracks) shall be stated in the test report. The test is deemed to have been passed if the crack is bridged in two out of three s
43、ubstrates. 9 Expression of results and precision 9.1 Expression of results The test is passed under the described conditions without any kind of cracks: yes/no. 9.2 Precision Precision data are currently not available. BS EN 15812:2011EN 15812:2011 (E) 9 10 Test report The test report shall include
44、at least the following information: a) a reference to this European Standard (i.e. EN 15812); b) all details necessary to identify the product tested; c) test method A or B; d) test procedure including: wet layer thickness; dry layer thickness; test temperature; deviation of test conditions; test sp
45、eed; e) the test results in accordance with Clause 9; f) the date of the tests. This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards-related publications, information and services. It pre
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