1、BS EN 13696:2008ICS 79.080; 97.150NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDWood flooring Test methods todetermine elasticityand resistance to wearand impact resistanceThis British Standardwas published under theauthority of the StandardsPolicy and Strateg
2、yCommittee on 31 January2009 BSI 2009ISBN 978 0 580 56450 5Amendments/corrigenda issued since publicationDate CommentsBS EN 13696:2008National forewordThis British Standard is the UK implementation of EN 13696:2008. Itsupersedes DD ENV 13696:2001 which is withdrawn.The UK participation in its prepar
3、ation was entrusted to TechnicalCommittee B/543, Round and sawn timber.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its correct applic
4、ation.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 13696:2008EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN 13696December 2008ICS 79.080; 97.150 Supersedes ENV 13696:2000 English VersionWood flooring - Test methods to determine elasticity andresistance to
5、wear and impact resistancePlanchers en bois - Mthodes dessai pour dterminerllasticit et la rsistance labrasion et la rsistance auchocHolzfubden - Prfverfahren zur Bestimmung derVerformbarkeit und der Bestndigkeit gegen Verschleiund gegen StobeanspruchungThis European Standard was approved by CEN on
6、8 November 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be
7、 obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Man
8、agement Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norw
9、ay, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2008 CEN All rights of exploitation in any form and
10、 by any means reservedworldwide for CEN national Members.Ref. No. EN 13696:2008: EBS EN 13696:2008EN 13696:2008 (E) 2 Contents Page Foreword 3 1 Scope 4 2 Normative references 4 3 Terms and definitions .4 4 Common methods .4 4.1 Conditioning .4 4.2 Measurement of the thickness of the lacquer 5 5 Wea
11、r 6 5.1 Principle 6 5.2 Test pieces .6 5.3 Abrading system 6 5.4 Test report . 13 6 Elasticity of the lacquer . 13 6.1 Principle . 13 6.2 Equipment . 14 6.3 Test piece 16 6.4 Procedure 17 6.5 Expression of the results for a test piece 17 6.6 Expression of the result for a batch . 17 6.7 Test report
12、. 18 7 Impact resistance 18 7.1 Principle . 18 7.2 Apparatus 18 7.3 Test specimens . 22 7.4 Conditioning 22 7.5 Procedure 22 7.6 Expression of results . 23 7.7 Test report . 23 Bibliography . 24 BS EN 13696:2008EN 13696:2008 (E) 3 Foreword This document (EN 13696:2008) has been prepared by Technical
13、 Committee CEN/TC 175 “Round and sawn timber”, the secretariat of which is held by AFNOR. 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 June 2009, and conflicting national standards shall be wit
14、hdrawn at the latest by June 2009. 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 standard supersedes ENV 13696:2000. According
15、to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
16、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 13696:2008EN 13696:2008 (E) 4 1 Scope This European Standard specifies a test method to determine the resistance to wear of lacquered wood flooring
17、s, a method to test the elasticity of the lacquer and a method to determine resistance to impact of lacquered wood floorings. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For un
18、dated references, the latest edition of the referenced document (including any amendments) applies. EN 13756:2002, Wood flooring Terminology EN ISO 868, Plastics and ebonite Determination of indentation hardness by means of a durometer (Shore hardness) (ISO 868:2003) EN ISO 291, Plastics Standard at
19、mospheres for conditioning and testing (ISO 291:2008) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13756:2002 and the following apply. 3.1 lacquer film making agent modifying surface layer properties NOTE It has a measurable thickness. 4 Common met
20、hods 4.1 Conditioning 4.1.1 Equipment Enclosures with the following climatic conditions: climate A temperature of (20 2) C and relative humidity of (65 5) %; or climate B temperature of (23 2) C and relative humidity of (50 5) %. 4.1.2 Procedure The manufacturer shall specify either of the condition
21、ing climates above. Unless otherwise specified, all equipment and materials required for the test shall be stabilised and kept in an enclosure in the climate specified. BS EN 13696:2008EN 13696:2008 (E) 5 4.2 Measurement of the thickness of the lacquer 4.2.1 Equipment 4.2.1.1 Optical instrument An i
22、nstrument with a resolution of at least ( 2) m. NOTE For instance, a binocular microscope with a magnification of 100 to 200 and a built-in measuring scale in the field of view. 4.2.1.2 Contrast marking A water-based felt tip pen. 4.2.2 Sampling Choose the location from which the test pieces are tak
23、en, depending on the purpose of the measurement (either in an unworn area or in a worn area). Test pieces with a size at least 10 mm x 10 mm and by the full thickness shall be cut out of one of the wear test pieces or area to be tested in elasticity. The number of test pieces is specified in 5.3.3.4
24、.1 and 6.4.1. 4.2.3 Procedure If needed, contrast mark the lacquered face with the felt-tip pen specified in 4.2.1.2. Clear-cut with a razor blade the edge of the lacquered face to be inspected. Mount the test piece with the clear-cut edge facing the microscope. For each test piece, make at least tw
25、o measurements to the accuracy allowed by the resolution of the optical instrument. Measurements of lacquer above open holes in the wood shall not be taken into account. 4.2.4 Expression of the results When required, average the measurements made on each test piece. If there is more than one test pi
26、ece, calculate to one significant figure the mean value and the coefficient of variation (expressed as a percentage) of the results. BS EN 13696:2008EN 13696:2008 (E) 6 5 Wear 5.1 Principle The resistance to wear is evaluated by abrading the face of representative test pieces or specimens with a spe
27、cified abrasive applied by means of two loaded wheels. The number of rotations, necessary to reach a defined wear, is used to evaluate the resistance to wear. 5.2 Test pieces 5.2.1 Dimensions The test shall be carried out on a test piece. The test piece shall have the shape of: either a square with
28、a side of 120 mm, its corners being trimmed so as to have a diagonal length reduced to about 130 mm, or, a disc with a diameter of about 130 mm. Samples, from which it is intended to obtain a test piece, may be smaller than the above dimensions. In that case, a test piece shall be produced by jointi
29、ng two or more elements according to the manufacturers specifications. Bore a hole (6 0,5) mm diameter and axis normal to the surface at the centre of the test piece. 5.2.2 Sampling Three test pieces shall be cut. The clearance between two test pieces shall be at least 100 mm. For elements which hav
30、e to be jointed, the three test species shall be made out of elements picked out at random. NOTE This sampling gives an estimation of the property of the lot. 5.2.3 Conditioning The test pieces shall be conditioned to constant mass in one of the climates defined in 4.1. Prior to testing, the lacquer
31、 shall be fully cured according to the manufacturers instructions. 5.3 Abrading system 5.3.1 Principle The system described in this Standard is a grit feeder system: a specified loose abrasive is fed continuously on to the face of the test piece, in the track of the loaded wheels. NOTE Other methods
32、 described in other standards could be possible. In this case, the results are expressed without making reference to this Standard. BS EN 13696:2008EN 13696:2008 (E) 7 5.3.2 Test equipment and materials 5.3.2.1 Abrading equipment and materials 5.3.2.1.1 Abrader Supporting disc Supporting disc shall
33、have a minimum diameter of 105 mm, rotating in the horizontal plane with a permitted deviation of 2 mm/m, at (60 2) r.p.m, the test piece being tightly held flat by means of a suitable clamping device. Abrading wheels Two cylindrical wheels free to turn on their axis, balanced by lever and counterwe
34、ight, with nominal diameter and width of respectively 44,4 mm and 12,7 mm. They are fitted with a leather strip having a width of (12,7 0,1) mm and a minimum thickness of 1,5 mm. The overall diameter of the wheels, when fitted with leather strips, shall not be less than 47,4 mm. The distance between
35、 the internal faces of the wheels shall be (53 2) mm, their common axis being set by 20 mm nominally of the axis of the test piece revolving support. The axis of rotation of the test piece shall be equidistant from the two wheels. A device shall apply the abrading wheels on the test piece with a for
36、ce of (10 0,1) N by each wheel. The device shall be able to maintain the 20 mm eccentricity for all possible thicknesses of test pieces. Revolution counter A revolution counter is needed to record the number of revolutions of the supporting disc. BS EN 13696:2008EN 13696:2008 (E) 8 Dimensions in mm
37、Key 1 Abrasive tank 9 Counterweight 2 Suction nozzle 10 Wearing surface 3 Clamping ring 11 Direction of rotation 4 Test piece 12 Screwed pin 5 Supporting disc 13 Nut 6 Testing weight 14 Plate 7 Abrading wheel 8 Lever Figure 1 Example of an abrader with grit feeder BS EN 13696:2008EN 13696:2008 (E) 9
38、 Grit feeder Grit feeder shall have a capacity of about 200 g of grit. It shall be openable at the top and at the bottom. The bottom opening shall be (10 1) mm above the face of the test piece and have a length of (16 1) mm. The length of the bottom opening shall be installed radially to the support
39、ing disc. To make sure of a regular flow, a device shall be provided in the grit feeder to ensure a regular flow. A further device ensuring an immediate stop of the feeding is also required. Vacuum cleaning device A single nozzle (3 2) mm above the track to be worn, shall be installed in the axial v
40、ertical plane between the two wheels before the grit feeder (relative to the rotation direction) and shall provide a differential pressure of (2 0,5) kPa. NOTE Equipment of this type, Taber Abrader and Taber Grit Feeder, is made by TELEDYNE TABER. This information is given for the convenience of use
41、rs of this European Standard and does not constitute an endorsement by CEN of the product named. Equivalent products may be used if they can be show to lead to the same results. 5.3.2.1.2 Additional material or equipment Weighing equipment For calibrating, the force applied by the abrading wheels on
42、 the test piece; and for calibrating the grit flow, a weighing equipment with an accuracy of 1 g is needed. It shall be accurate to 1 g. Leather strip The leather strip is to be fitted on the perimeter of the abrading wheels. Its hardness shall be suitable for the purpose. It is measured according t
43、o the procedure in EN ISO 868 with a Shore-Durometer of Type A with the following deviations: Shore-A hardness is measured at four points in the middle of the tire tread of abrading wheels (instead of the demands in 5.1, 5.2 and 8.1); hardness of the leather is suitable if all the results are contai
44、ned within the range A/1:85 A/1:95. Abrading plate (to calibrate the leather) A plate fitted with a grinding paper with a grain of 240 and a plate fitted with a grinding paper with a grain of 150 according to ISO 6344-1 (about 0,06 mm). Abrading material Pure Carborundum grit (di-aluminium tri-oxide
45、) falling through a 240 meshes per inch sieve and retained on a 280 meshes per inch sieve (grade 240). NOTE These sieves permit grit of 50 m to 63 m to fall through. Stopwatch A stopwatch accurate to 0,1 s. A tank to recover the grit A tank of known mass to recover the grit when calibrating the grit
46、 feeder. BS EN 13696:2008EN 13696:2008 (E) 10 Calibration plates Calibration plates made of cast acrylic. NOTE Equipment of this type, Taber Abrader and Taber Grit Feeder, are made by TELEDYNE TABER. This information is given for the convenience of users of this European Standard and does not consti
47、tute an endorsement by CEN of the product named. Equivalent products may be used if they can be show to lead to the same results. 5.3.2.2 Equipment to evaluate the wear of the abraded areas 5.3.2.2.1 For visual observation transparent template: each quadrant is divided into four sectors of 22,5; con
48、trast making solution: water-based solution of 1 % Methylene or Alkali Blue. 5.3.2.2.2 Equipment to measure the thickness of the lacquer Defined in 4.2. 5.3.3 Procedure 5.3.3.1 Preparation of the abrader 5.3.3.1.1 Installation of the leather strips The leather strips, conditioned in the climate used
49、 in the test and defined in 4.1.2, shall be bonded with their back face to the abrading wheels, by means of a solvent free glue. The gap between the two ends of the strip shall not exceed 0,5 mm and shall make a bevel of about 45 with the edges of the wheel. When the glue is cured, the wheels shall be turned in a lathe to a cylindrical shape and to the dimensions specified in 5.3.2.1.1. Finally, the wheels shall be abraded for at least 400 revolutions firstly on abrading plates fitted with a grain 150 according to
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