1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 12326-2:2011Slate and stone fordiscontinuous roofing andexternal claddingPart 2: Methods of test for slate andcarbonate slateBS EN 12326-2:2011 BRITISH STANDARDNational for
2、ewordThis British Standard is the UK implementation of EN 12326-2:2011.It supersedes BS EN 12326-2:2000 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/542/7, Slate and stone products.A list of organizations represented on this committee can beobtaine
3、d on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2011ISBN 978 0 580 71442 9ICS 91.100.15Compliance with a British Standard cannot confer immunity fromlegal obligations.This Brit
4、ish Standard was published under the authority of theStandards Policy and Strategy Committee on 31 July 2011.Amendments issued since publicationDate Text affectedBS EN 12326-2:2011EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 12326-2 June 2011 ICS 91.100.15 Supersedes EN 12326-2:2000English V
5、ersion Slate and stone for discontinuous roofing and external cladding -Part 2: Methods of test for slate and carbonate slate Ardoises et pierres pour toiture et bardage extrieur pour pose en discontinu - Partie 2: Mthodes dessais pour ardoises et ardoises carbonates Schiefer und Naturstein fr berla
6、ppende Dachdeckungen und Auenwandbekleidungen - Teil 2: Prfverfahren fr Schiefer und carbonathaltige Schiefer This European Standard was approved by CEN on 19 May 2011. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European S
7、tandard 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 versions (Eng
8、lish, 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 Austria, Belgium,
9、 Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTE
10、E FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 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 12326-2:2011: EBS EN 12326-2:2011EN 12326
11、-2:2011 (E) 2 Contents Page Foreword 51 Scope 62 Normative references 63 Terms, definitions and symbols .63.1 Terms and definitions .63.2 Symbols 64 Surveillance sampling procedure 95 Determination of the length and width and the deviation from the specified length and width . 105.1 Principle . 105.
12、2 Apparatus 115.3 Preparation of test pieces 115.4 Procedure 115.5 Expression of the results . 115.6 Test report . 116 Determination of the amount by which the edges deviate from a straight edge . 116.1 Principle . 116.2 Apparatus 116.3 Preparation of test pieces 126.4 Procedure 126.5 Expression of
13、the results . 126.6 Test report . 127 Determination of the rectangularity of slates 137.1 Principle . 137.2 Apparatus 137.3 Preparation of test pieces 137.4 Procedure 137.5 Expression of the results . 137.6 Test report . 148 Determination of the thickness of individual slates 148.1 Principle . 148.2
14、 Apparatus 148.3 Preparation of test pieces 148.4 Procedure 148.5 Expression of results . 158.6 Test report . 169 Determination of the deviation from flatness 169.1 Principle . 169.2 Apparatus 169.3 Preparation of test pieces 179.4 Procedure 179.5 Expression of results . 179.6 Test report . 1810 Det
15、ermination of the modulus of rupture, and characteristic modulus of rupture . 1810.1 Principle . 1810.2 Apparatus 1810.3 Preparation of test pieces 18BS EN 12326-2:2011EN 12326-2:2011 (E) 3 10.4 Procedure . 1910.5 Expression of the results 2010.6 Test report 2011 Water absorption test 2111.1 Princip
16、le 2111.2 Reagents. 2111.3 Apparatus . 2111.3.1 Oven, ventilated and capable of maintaining a temperature of (110 5) C. 2111.3.2 Water cooled diamond saw. . 2111.3.3 Balance, capable of weighing to 0,002 g. 2111.3.4 Water bath, containing water as specified in 11.2.1 and capable of being maintained
17、at (23 5) C. 2111.3.5 Absorbent cloth. 2111.4 Preparation of test pieces. 2111.5 Procedure . 2111.6 Expression of the results 2211.7 Test report 2212 Freeze-thaw test 2312.1 Principle 2312.2 Reagent. 2312.3 Apparatus . 2312.4 Preparation of test pieces. 2312.5 Procedure . 2312.6 Expression of result
18、s and test report 2413 Determination of the apparent calcium carbonate and non carbonate carbon content by catalytic thermal decomposition . 2413.1 Principle 2413.2 Reagents. 2513.2.1 Tungsten/tin accelerator. 2513.2.2 Iron chips 2513.2.3 Platinum catalyst. 2513.3 Apparatus . 2513.4 Preparation of p
19、owdered test pieces 2513.5 Procedure . 2513.5.1 Determination of the total carbon content CT. 2513.5.2 Determination of the non carbonate carbon content Cnc . 2513.6 Expression of results 2613.7 Test report 2614 Sulfur dioxide exposure tests 2714.1 Sulfur dioxide exposure test for slates with a carb
20、onate content less than or equal to 20 % (mass percentage) 2714.1.1 Principle 2714.1.2 Reagents. 2714.1.3 Apparatus . 2714.1.4 Preparation of test pieces. 2714.1.5 Procedure . 2714.1.6 Test report 2814.2 Sulfur dioxide exposure test for slates with a calcium carbonate content more than 20 % (mass pe
21、rcentage) . 2814.2.1 Principle 2814.2.2 Reagents. 2814.2.3 Apparatus . 2814.2.4 Preparation of test pieces. 2914.2.5 Procedure . 2914.2.6 Expression of results 3514.2.7 Test report 3615 Thermal cycle test . 36BS EN 12326-2:2011EN 12326-2:2011 (E) 4 15.1 Principle . 3615.2 Reagents 3615.3 Apparatus 3
22、615.4 Preparation of test pieces 3615.5 Procedure 3615.6 Test report . 3716 Petrographic examination 3716.1 Introduction . 3716.2 Principle . 3716.3 Apparatus 3716.4 Reagents 3816.4.1 Alumina polishing paste: . 3816.5 Preparation of test pieces 3816.5.1 Thin sections . 3816.5.2 Polished sections . 3
23、816.5.3 X-ray diffraction specimens . 3916.6 Procedure 3916.6.1 Macroscopic examination 3916.6.2 Microscopical examination 4016.7 Expression of results . 4116.8 Test report . 41Annex A (informative) Petrographic interpretation . 42A.1 Connection between the micas (Figure A.1 (a) and (b) . 42A.2 Bedd
24、ing and cleavage, angle of intersection (Figures A.1 (c) to (q) 42Annex B (informative) Petrographic examination of origin and identification of slate . 44B.1 Identification of slate 44B.2 Origin . 44B.3 Report 45Bibliography . 46BS EN 12326-2:2011EN 12326-2:2011 (E) 5 Foreword This document (EN 123
25、26-2:2011) has been prepared by Technical Committee CEN/TC 128 “Roof covering products for discontinuous laying and products for wall cladding”, the secretariat of which is held by NBN. This European Standard shall be given the status of a national standard, either by publication of an identical tex
26、t or by endorsement, at the latest by December 2011, and conflicting national standards shall be withdrawn at the latest by December 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 respon
27、sible for identifying any or all such patent rights. This document supersedes EN 12326-2:2000. The most important changes in this version of the standard concern: - Clause 10 “Determination of the modulus of rupture, and characteristic modulus of rupture“; - Clause 12 “Freeze-thaw test“; - Clause 13
28、 “Determination of the apparent calcium carbonate and non carbonate carbon content by catalytis thermal decomposition“; - a new informative Annex B has been added “Petrographic examination of origin and identification of slate“. EN 12326 consists of the following parts: Part 1: Product specification
29、; Part 2: Methods of test for slate and carbonate slate. 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, Denmark, Estonia, Fi
30、nland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 12326-2:2011EN 12326-2:2011 (E) 6 1 Scope This European Standard specif
31、ies test methods for slate and carbonate slate for roofing and wall cladding. It is applicable to natural roofing products as defined in EN 12326-1:2004 used for assembly into discontinuous roofs and external wall cladding. NOTE Where the term “slate“ is used in this document it means slate and carb
32、onate slate unless otherwise indicated. 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, the latest edition of the referenced document (including any amendme
33、nts) applies. EN 12326-1:2004, Slate and stone products for discontinuous roofing and cladding Part 1: Product specification 3 Terms, definitions and symbols 3.1 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1.1 test piece (of slate) piece sawn
34、 from a slate and prepared for testing as defined by the relevant test procedure 3.1.2 powdered test piece (of slate) piece or pieces of a slate or slates prepared for testing by grinding to a powder of a defined particle size 3.1.3 sampling process of selecting a slate or a set of slates for testin
35、g 3.1.4 constant mass mass achieved when two successive weightings taken 24 h apart do not differ by more than 0,001 g (or 0,01 % of the weight of the test piece) 3.1.5 modulus of rupture maximum stress sustained by a slate test piece when a bending moment is applied NOTE In this European Standard t
36、he geometry of the test is three point bending. 3.2 Symbols Symbol Physical quantity Unit Awwater absorption % a rate of application of stress in the bend strength test (N/mm2)/s BS EN 12326-2:2011EN 12326-2:2011 (E) 7 b width of a slate or a test piece mm Caapparent mass percentage calcium carbonat
37、e in slate % Cccarbonate carbon content of slate % cC mean carbonate carbon content of a slate % Cdcarbon dioxide content of a test piece or standard preparation % CTtotal carbon in a slate % Cncnon-carbonate carbon in a slate % e thickness of a slate mm emmean of three thickness measurements used t
38、o determine the rate of application of load in the bend strength test mm emaxmaximum of four thickness measurements carried out on one slate test piece mm e mean thickness of a slate test piece or series of test pieces mm eimean of 8 thickness measurements in the modulus of rupture test mm Edmaximum
39、 deviation of the thickness of a slate from the mean thickness % esthickness of the softened layer in the SO2exposure test mm e1Ato e4Aindividual thickness measurements in the SO2exposure test mm E1conductivity reading for total carbon S/m E2conductivity reading for non-carbonate carbon S/m f gas vo
40、lume reduction factor of the pump in the determination of non-carbonate carbon content by coulometry - f gas volume reduction factor of the pump in the blank determination of non-carbonate content by coulometry - f1f2means of three dial gauge readings in the flatness test mm fddeviation from flatnes
41、s of a slate mm Fddeviation from flatness of a slate as a percentage of its length % I number of pulses recorded in the determination of non-carbonate carbon content by coulometry - I number of pulses recorded in the blank determination of non-carbonate carbon content by coulometry - k proportionali
42、ty factor specific to the apparatus in the determination of non-carbonate carbon content by coulometry - BS EN 12326-2:2011EN 12326-2:2011 (E) 8 K wavelength of the radiation used in the x-ray diffraction analysis nm lslength of a slate mm ltdistance between the bending supports to base mm modry mas
43、s of a test piece in the water absorption test g mpmass of a powdered test piece of slate mg mcmass of a powdered test piece used for total carbon in the determination of apparent calcium carbonate content by the conductivity of sodium hydroxide mg mncmass of a powdered test piece for non-carbonate
44、carbon in the determination of apparent calcium carbonate content by the conductivity of sodium hydroxide mg msmass of calcium carbonate used in the determination of apparent calcium carbonate content by conductivity of sodium hydroxide mg mwwet mass of a test piece in the water absorption test g m1
45、total carbon content in the determination of apparent calcium carbonate content by catalytic thermal decomposition % m2content of non-carbonate carbon in the determination of apparent calcium carbonate content by catalytic thermal decomposition % m3content of carbonate carbon in the determination of
46、 apparent calcium carbonate content by catalytic thermal decomposition % n number of slates subject to a test - Pifailure load of individual slates in the bending strength test N rdindividual measurements of the deviation of a slate from a rectangle mm rdmaxmaximum deviation of a slate from a rectan
47、gle mm Rddeviation of a test slate from a rectangle as a percentage of its length % R Rimodulus of rupture of test slates N/mm2R sample mean modulus of rupture of test slates N/mm2Rlsample mean modulus of rupture of test slates measured in the longitudinal orientation N/mm2Rtsample mean modulus of r
48、upture of test slates measured in the transverse orientation N/mm2Rccharacteristic modulus of rupture of test slates N/mm2R1sample mean modulus of rupture of the control test pieces in the freeze-thaw test N/mm2BS EN 12326-2:2011EN 12326-2:2011 (E) 9 R2sample mean modulus of rupture of the frost exposed test pieces in the freeze-thaw test N/mm2s sample
