Unknown BRITISH STANDARD BS EN 846 13 2001 Methods of test for ancillary components for masonry — Part 13 Determination of resistance to impact, abrasion and corrosion of organic coatings The European[.]
BRITISH STANDARD Methods of test for ancillary components for masonry — Part 13: Determination of resistance to impact, abrasion and corrosion of organic coatings The European Standard EN 846-13:2001 has the status of a British Standard ICS 91.080.30 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN 846-13:2001 BS EN 846-13:2001 National foreword This British Standard is the official English language version of EN 846-13:2001 EN 846-13 is a supporting standard to the forthcoming “harmonized” European product standard specifications on ancillary components for masonry, EN 845-1 and EN 845-2 These standards are the subject of transitional arrangements agreed under the Commission mandate The Member States have agreed a nominal transition period for the co-existence of these standards and their corresponding national standard(s) It is intended that this period will comprise a nominal nine month period during which any required changes to national regulations are to be made, followed by a further nominal twelve month period for the implementation of CE marking At the end of this co-existence period, the national standard(s) will be withdrawn In the UK there are no corresponding national standards to EN 846-13 The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated tests, to Subcommittee B/519/1, Masonry units, which has the responsibility to: — aid enquirers to understand the text; — present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; — monitor related international and European developments and promulgate them in the UK A list of organizations represented on this subcommittee can be obtained on request to its secretary Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International 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 application Compliance with a British Standard does not of itself confer immunity from legal obligations This British Standard, having been prepared under the direction of the Sector Policy and Strategy Committee for Building and Civil Engineering, was published under the authority of the Standards Policy and Strategy Committee on 13 December 2001 Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages to 14, an inside back cover and a back cover The BSI copyright date displayed in this document indicates when the document was last issued Amendments issued since publication Amd No © BSI 13 December 2001 ISBN 580 38784 Date Comments EN 846-13 EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM August 2001 ICS 91.080.30 English version Methods of test for ancillary components for masonry — Part 13: Determination of resistance to impact, abrasion and corrosion of organic coatings Mộthodes d'essai pour composants accessoires de maỗonnerie Partie 13: Détermination de la résistance l'impact, l'abrasion et la corrosion des protections organiques Prüfverfahren für Ergänzungsbauteile für Mauerwerk — Teil 13: Bestimmung der Schlagfestigkeit, des Abriebwiderstands und der Korrosionsbeständigkeit von organischen Beschichtungen This European Standard was approved by CEN on 23 June 2001 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 concerning such national standards may be obtained on application to the 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 Management Centre has the same status as the official versions CEN members 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 COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 © 2001 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members B-1050 Brussels Ref No EN 846-13:2001 E EN 846-13:2001 (E) Contents Page Foreword Scope Normative references Principle 4 Sampling Apparatus Determination of impact resistance Determination of abrasion resistance 10 Accelerated corrosion test 11 Test report 13 EN 846-13:2001 (E) Foreword This European Standard has been prepared by Technical Committee CEN/TC 125, Masonry, 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 endorsement, at the latest by February 2002, and conflicting national standards shall be withdrawn at the latest by February 2002 According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom EN 846-13:2001 (E) Scope This European Standard specifies a method for determining the level of performance of those organic coatings classified in prEN 845-1 and prEN 845-2 as type applied as a protective system to zinc coated steel plate used in the fabrication of ancillary components for masonry Normative references This European Standard incorporates, by dated or undated reference, provisions from 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 amendment or revision For undated references the latest edition of the publication referred to applies (including amendments) EN 197-1, Cement — Part 1: Composition, specifications and conformity criteria for common cements BS 871:1981 , Specification for abrasive paper and cloths Principle The performance of organic coatings is determined from tests for impact resistance, abrasion resistance and an accelerated corrosion test The impact and abrasion resistance are determined using a heavy rigid pendulum apparatus whereby the spring loaded tip of the pendulum strikes the test specimen at a specified distance from bottom dead centre The accelerated corrosion performance is determined from the electrical resistance of the organic coating during a period of exposure to an alkaline solution Sampling 4.1 Sampling for impact and abrasion tests The minimum number of specimens for each test shall be six, plus two further specimens, if required (see 6.2) Test specimens shall be flat plate not less than 300 mm long x 50 mm wide either: — cut from a sample of the product, where practicable; or — purpose made and protected using a process identical to that used to protect the product Where specimens are to be cut from a product, they shall be spaced not less than 300 mm apart NOTE It is critical to use flat plate since any undulations in the metal will cause local high or low spots Published by the British Standards Institution, 389 Chiswick High Rd., London W4 4AL EN 846-13:2001 (E) 4.2 Sampling for accelerated corrosion test The minimum number of specimens shall be three, see 8.1.1 Test specimens shall be flat plate chosen to suit the test cell dimensions (see Figure 3) but shall preferably be not less than 250 mm long x 100 mm wide either: — cut from a sample of the product, where practicable; or — cut from galvanized steel plate to the specification used to produce the product Where specimens are to be cut from a product, they shall be spaced not less than 300 mm apart Apparatus 5.1 Tolerances The permissible deviation on masses of the apparatus shall be ±10 g and on apparatus dimensions ±1 % 5.2 Impact and abrasion tests apparatus 5.2.1 Steel pendulum 5.2.2 A typical steel pendulum is shown in Figure Its mass acting at centre of action is 8,71 kg The pendulum tip for the impact test is 0,5 mm thick and mm wide and made from hardened carbon steel The form of the tip used is shown in Figure This is attached to the pendulum such as to produce a mm wide impact strip (i.e with the flat dimension perpendicular to the swing direction of the pendulum) 5.2.3 The pendulum tip used for the abrasion test is of hemi-cylindrical profile, radius 12,5 mm and length 12 mm, and made from hardened carbon steel The tip is covered with first quality blue twill emery cloth conforming to the requirements of grade No of BS 871:1981 NOTE At present there is no European Standard or International standard which covers the type and grade of the emery cloth used with the pendulum apparatus Accordingly, it has been agreed to refer to British Standard 871 EN 846-13:2001 (E) Dimensions in millimetres Key a d Ei h L Pn = > ? @ A Centre of action at 475 mm radius Distance of point of impact from centre line of apparatus Tangent angle of impact Drop height = 150 mm for impact tests and 815 mm for abrasion tests Length of pendulum Release catch position Test specimen Base plate Pendulum = 54 mm diameter steel bar Adjustable height pivot point Spring loaded tip (spring rate = 0,5 mm/kg) Figure — Steel pendulum impact/abrasion test apparatus EN 846-13:2001 (E) Dimensions in millimetres Key a b c d e Main disc Contact tip Ground bevel Fixing screw hole Locating pin hole Figure — Tip for use in impact tests EN 846-13:2001 (E) 5.3 Accelerated corrosion test apparatus 5.3.1 Glass test cells as shown in Figure 5.3.2 An a.c resistance bridge capable of measuring resistances in the range 10 to1 000 M9 to an accuracy of 0,1 % at a frequency of 600 Hz ± 20 Hz and a voltage of V ± 0,5 V It is essential to use alternating current for this test 5.3.3 Holiday detector, used for detecting discontinuities in the protective coating Key a b c d e f g h Alkaline electrolyte Glass test cell Platinum electrode Epoxy resin sealing fillet Resistance bridge Coating layer Galvanizing layer Steel substrate Figure — Accelerated corrosion test apparatus EN 846-13:2001 (E) Determination of impact resistance 6.1 Procedure Test each of the specimens as follows a) Place the specimen below the pendulum with its edges parallel to the line of swing of the pendulum b) Set the pendulum with the impact resistance tip to the position shown in Figure and release it from a height of 150 mm c) After impact, remove the specimen and examine its surface After each test, check the pendulum tip for wear and/or damage Regrind or renew as necessary 6.2 Assessment of results Assess and classify the impact resistance category using Table and the diagram in Figure as given below a) The impact resistance category of all six specimens is or less b) The impact resistance category of not less than five specimens is or less, but the impact resistance category of the sixth specimen is greater than but less than or equal to In this case tests on two further specimens have an impact resistance category of or less c) As b) above, but if either of the two further specimens has an impact resistance category greater than d) In all other cases, or if the impact resistance category of any specimen is greater than EN 846-13:2001 (E) c b a d Key a b c d Point of impact Centre of test arc Coated area of specimen Exposed galvanized area Figure — Assessment of impact test results Table — Classification of impact test results Resistance category Description (See also Figure 4) Surface marring at area of initial impact; no galvanized surface exposed; coating marked but not cut through along areas of swing Coating gouged at area of initial impact; galvanized surface exposed but no flaking; coating marked but not cut through along areas of swing Coating gouged at areas of initial and first subsidiary impact and also possibly at additional high spots; galvanized surface exposed but no flaking at edges; coating marked but not cut through along other areas of swing Coating gouged at areas of initial and subsidiary impact; scraping; not more than 25 % of test area having exposed galvanizing; slight flaking at edges; coating marked along areas of swing Determination of abrasion resistance 7.1 Procedure Test each of the specimens as follows a) Place the specimen below the pendulum with its edges parallel to the line of swing of the pendulum b) Set the pendulum with the abrasion resistance tip to the position shown in Figure and release it from a height of 850 mm c) After impact, remove the specimen and examine its surface 10 EN 846-13:2001 (E) After each test, check the pendulum tip for wear and/or damage Regrind or renew as necessary 7.2 Assessment of results Assess and classify the results of the abrasion test as follows a) The protective coating is intact, with no part of the zinc coating exposed b) The protective coating on five specimens is intact, but the coating on the sixth specimen is exposed, and tests on two further test specimens retain their protective coatings intact c) As b) above, but if either of the two further specimens has any part of the zinc coating exposed d) In all other cases Accelerated corrosion test 8.1 Preparation of steel test panels Apply a type of protective coating that has passed the impact and abrasion tests described in 7.1 and 8.1 to the steel test panels, using the same method and pre-treatment as that to be used to coat the product during manufacture Inspect the panels to determine the quality of the surface and any visible defects, such as voids, cracks, runs or sags Check for discontinuities in the protective coating, using the holiday detector If defects are found in any test panel, reject the panel and prepare a new panel 8.2 Preparation of alkaline solution Add 300 g of Portland Cement, conforming to EN 197-1 type CEM I, to one litre of deionized water Stir for not less than 1/2 h Allow to settle Ensure that the pH of the clear liquid is 12,6 ± 0,1, adjusting to this value if necessary Decant off the liquid 8.3 Procedure Test the panels as follows: a) Attach the test cells to not less than three prepared test panels using an epoxy resin adhesive compatible with the paint coating to seal the outer edges of the cell b) Allow the adhesive not less than 24 h to set c) Fill the cells with alkaline solution (see 8.1.2) to a height of 30 mm d) Position a platinum electrode in the solution 25 mm above each test panel e) Connect a lead from one side of the a.c resistance bridge to the substrate steel of each panel and the corresponding lead from the other side of the resistance bridge to the appropriate platinum electrode 11 EN 846-13:2001 (E) f) Measure the resistance of each panel, using the a.c resistance bridge, at appropriate intervals (see Figure 5) for not less than 90 days g) Plot the readings obtained from (f) on a graph showing resistance against time NOTE To keep the graph compact, a log scale should be used for the resistance values A typical graph is shown in Figure 8.4 Assessment of results If the resistance of all the test panels does not fall below 350 k9 at any time during the test, the type of protective coating shall be accepted If the resistance of any panel falls below 350 k9 the type and/or thickness of protective coating shall be rejected 12 EN 846-13:2001 (E) Key Resistance, 9(log scale) Time, days Figure — Typical resistance time curve for a satisfactory coating Test report The test report shall include the following information: a) the number, title and date of issue of this European Standard; b) the place, date and time of taking the samples; c) the name of the laboratory; d) the date of testing the specimens for impact and abrasion; e) the end date of the accelerated corrosion test; f) the results of the impact test (individual results and the overall assessment); 13 EN 846-13:2001 (E) g) the results of the abrasion test (individual results and the overall assessment); h) the results of the accelerated corrosion test (individual values of electrical resistance and the overall assessment); i) remarks, if any 14 blank BS EN 846-13:2001 BSI — British Standards Institution BSI is the independent national body responsible for preparing British Standards It presents the 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