1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 14617-4:2012Agglomerated stone TestmethodsPart 4: Determination of the abrasionresistanceBS EN 14617-4:2012 BRITISH STANDARDNational forewordThis British Standard is the UK
2、 implementation of EN 14617-4:2012.It supersedes BS EN 14617-4:2005 which is withdrawn.The UK participation in its preparation was entrusted to TechnicalCommittee B/545, Natural stone.A list of organizations represented on this committee can beobtained on request to its secretary.This publication do
3、es not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2012. Published by BSI StandardsLimited 2012ISBN 978 0 580 75918 5ICS 91.100.15Compliance with a British Standard cannot confer immunity fromlegal
4、obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 31 May 2012.Amendments issued since publicationDate Text affectedBS EN 14617-4:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14617-4 April 2012 ICS 91.100.15 Supersedes EN
5、14617-4:2005English Version Agglomerated stone - Test methods - Part 4: Determination of the abrasion resistance Pierre agglomre - Mthodes dessai - Partie 4: Dtermination de la rsistance lusure Knstlich hergestellter Stein - Prfverfahren - Teil 4: Bestimmung der Abriebbestndigkeit This European Stan
6、dard was approved by CEN on 9 March 2012. 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 su
7、ch 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 member into its ow
8、n 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, Ireland, Ital
9、y, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17
10、, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 14617-4:2012: EBS EN 14617-4:2012EN 14617-4:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Principle of the test method .44 Abrasive mate
11、rial .45 Apparatus .46 Calibration 77 Test specimen preparation .77.1 Sampling .77.2 Specimens preparation .78 Procedure .88.1 Test method 88.2 Groove measurement 89 Test results .810 Test report 9Bibliography . 10BS EN 14617-4:2012EN 14617-4:2012 (E) 3 Foreword This document (EN 14617-4:2012) has b
12、een prepared by Technical Committee CEN/TC 246 “Natural stones”, the secretariat of which is held by UNI. 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 2012, and conflicting national sta
13、ndards shall be withdrawn at the latest by October 2012. 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 1
14、4617-4:2005. Clause 6 has been modified since the last edition of this European Standard. This European Standard is one of a series of standards for test methods for agglomerated stones which includes the following: EN 14617-1, Agglomerated stone Test methods Part 1: Determination of apparent densit
15、y and water absorption EN 14617-2, Agglomerated stone Test methods Part 2: Determination of flexural strength (bending) EN 14617-4, Agglomerated stone Test methods Part 4: Determination of the abrasion resistance EN 14617-5, Agglomerated stone Test methods Part 5: Determination of freeze and thaw re
16、sistance EN 14617-6, Agglomerated stone Test methods Part 6: Determination of thermal shock resistance EN 14617-8, Agglomerated stone Test methods Part 8: Determination of resistance to fixing (dowel hole) EN 14617-9, Agglomerated stone Test methods Part 9: Determination of impact resistance EN 1461
17、7-10, Agglomerated stone Test methods Part 10: Determination of chemical resistance EN 14617-11, Agglomerated stone Test methods Part 11: Determination of linear thermal expansion coefficient EN 14617-12, Agglomerated stone Test methods Part 12: Determination of dimensional stability EN 14617-13, Ag
18、glomerated stone Test methods Part 13: Determination of electrical resistivity EN 14617-15, Agglomerated stone Test methods Part 15: Determination of compressive strength EN 14617-16, Agglomerated stone Test methods Part 16: Determination of dimensions, geometric characteristics and surface quality
19、of modular tiles 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, Finland, France, Germany, Greece, Hungary,
20、 Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom BS EN 14617-4:2012EN 14617-4:2012 (E) 4 1 Scope This European Standard specifies a method for determining the
21、abrasion resistance of agglomerated stone products. 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 edi
22、tion of the referenced document (including any amendments) applies. EN 13373, Natural stone test methods Determination of geometric characteristics on units ISO 8486-1, Bonded abrasives Determination and designation of grain size distribution Part 1: Macrogrits F4 to F220 3 Principle of the test met
23、hod The test method is based on scraping off the upper face of the agglomerated stone specimen using an abrasive material under standard conditions. 4 Abrasive material The abrasive required for this test is corundum (white fused aluminium oxide, i.e. alumina) with grit size of F80 according to stan
24、dard ISO 8486-1. It shall not be used more than three times. 5 Apparatus The wearing machine is of the type of Figure 1, which consists of a rotating abrasion wheel, a storage hopper with one or two control valves to regulate the feed of the abrasive material into a flow guidance hopper, a clamping
25、trolley, a counterweight and a device measuring the number of revolutions. Whenever two valves are used, one, which can be permanently set, shall be used to control the flow rate of corundum, while the other one is used to turn the flow on and off. The hardness of the steel shall be 203 HB to 245 HB
26、. Its diameter shall be (200 1) mm and its edge thickness (10 1) mm. It shall be driven to a rotation speed of 75 rotations in (60 3) s. A mobile clamping trolley is mounted on bearings and forced to press the test specimen against the wheel by a counterweight of constant mass. The storage hopper co
27、ntaining the abrasive material feeds a flow guidance hopper. The flow guidance hopper (cylindrical or rectangular) shall have a slotted outlet: the length of the slot shall be (9 1) mm and the width shall be adjustable. The body of the flow guidance hopper shall be at least 10 mm bigger than the slo
28、t in all directions (though this is not required in the case of a rectangular hopper with at least one of the sides inclined down to the length (see Figure 2, Example B). BS EN 14617-4:2012EN 14617-4:2012 (E) 5 Key 1 clamping trolley 2 fixing screw 3 specimen 4 control valve 5 storage hopper 6 flow
29、guidance hopper 7 abrasion wheel 8 counterweight 9 flow guidance slot 10 groove 11 abrasive material flow 12 abrasive collector 13 wedge Figure 1 Principle of wearing machine The distance of the fall between the slot and the axle of the abrasion wheel shall be (100 5) mm, and the flow of abrasive ma
30、terial shall be 1 mm to 5 mm behind the leading edge of the wheel (see Figure 3). The minimum flow rate of the abrasive material through the flow guidance slot shall be 100 g/100 revolutions onto the abrasion wheel. The flow rate of abrasive material shall be constant, and the minimum level of the a
31、brasive in the flow guidance hopper shall be 25 mm (see Figure 3). In addition, the following apparatuses are needed: a magnifying glass (preferably equipped with a light), a steel ruler and a digital calliper. BS EN 14617-4:2012EN 14617-4:2012 (E) 6 Dimensions in millimetres Key A inclined side B v
32、ertical side (for key see Figure 1) Figure 2 Slot position in the flow guidance hopper (for key see Figure 1) Dimensions in millimetres Figure 3 Position slot relative to abrasion wheel (for key see Figure 1) BS EN 14617-4:2012EN 14617-4:2012 (E) 7 6 Calibration The apparatus shall be calibrated eit
33、her after grinding 400 grooves or after every two months, whichever is the lesser and every time there is a new operator, a new abrasive batch or a new abrasion wheel. The abrasive flow rate shall be verified by pouring the abrasive material from a height of approximately 100 mm into a pre-weighed r
34、igid container with a smooth rim, a height of (90 10) mm and a known volume (approximately 1 litre). As the container fills, the pourer shall be raised so as to approximately maintain the 100 mm fall. When the container is filled, the top shall be struck off level and weighed to determine the mass o
35、f abrasive for a known volume, i.e. the density. The abrasive shall then be run through the wearing machine and collected below the abrasion wheel in a pre-weighed container, the regularity of the corundum flow during the test checked approximately every 100 g/100 revolutions. The apparatus shall be
36、 calibrated against a reference sample of “glass float” using the procedure in 8.1 with the counterweight adjusted so that after 150 revolutions of the wheel at a rotation rate of 75 rotations in (60 3) s the length of the groove produced is 31,5 mm 0,5 mm. The counterweight should be increased or d
37、ecreased to increase or decrease the groove length respectively. The clamping trolley/counterweight assembly should be checked for undue friction. The groove shall be measured using the procedure in 8.2 to the nearest 0,1 mm, and the three results averaged to give the calibration value. An alternati
38、ve material, such as fused quartz, may be used for the reference sample if a good correlation is established with a reference sample of “glass float”. At every calibration of the apparatus, the squareness of the sample supports shall be checked. The groove on the reference sample shall be rectangula
39、r with a difference between the measured length of the groove at either side not exceeding 0,5 mm. If necessary, check that: the sample has been held perpendicular to the wheel; the clamping trolley and the flow guidance slot are parallel to the wheel axle; the flow of abrasive is even across the sl
40、ot; the friction in the trolley/counterweight assembly is not excessive. 7 Test specimen preparation 7.1 Sampling Sampling is not the responsibility of the test laboratory, unless otherwise agreed. It shall be appropriately assigned to the agglomerated stone consignment. Whenever possible, the rando
41、m sampling method shall be used. Test specimens shall be, however, representative of the agglomerated stone sample: they shall be taken from manufactured slabs incorporating the upper face of the sample and cut to the proper size for the measuring apparatus (minimum size 100 mm 70 mm). At least six
42、specimens shall be selected from a homogeneous batch consisting of the same material and geometric shape. 7.2 Specimens preparation The test specimen shall be clean and dry. The upper face, which shall be tested, shall be flat within a tolerance of 1 mm and measured according to EN 13373 in two perp
43、endicular directions over 100 mm. BS EN 14617-4:2012EN 14617-4:2012 (E) 8 If the upper face has a rough texture or overcomes the allowed tolerance, it shall be lightly ground to provide a smooth, flat surface that will fulfil the allowed tolerance. Immediately before testing, the surface to be teste
44、d shall be cleaned with a stiff brush to remove any dust or grit and then covered with a surface dye to facilitate measuring the groove (e.g. painting with a permanent marker pen). 8 Procedure 8.1 Test method Fill the storage hopper with dry corundum (maximum moisture content 1,0 wt. %). Remove the
45、clamping trolley from the abrasion wheel. Position the specimen on it so that it lies tangent to the rotating disk and so that the groove produced shall be at least 15 mm from any edge of the specimen. Fix the specimen on a wedge to let the abrasive flow pass under it. Place the corundum collector b
46、eneath the abrasion wheel. Bring the specimen into contact with the abrasion wheel. Open the control valve and simultaneously start the motor so that the abrasion wheel attains a rotation rate of 75 rotations in (60 3) s. Visually check the regularity of the corundum flow during the test (approximat
47、ely 100 g/100 revolutions). After 150 revolutions of the wheel, the abrasive flow and the wheel are to be stopped. Whenever possible, two tests shall be performed on each specimen. 8.2 Groove measurement The results of the test are obtained by measuring the groove as follows (see Figure 4): a) put t
48、he specimen under a magnifying glass (at least 2 x magnification and preferably equipped with a light) to facilitate the measuring of the groove; b) using a ruler and pencil, draw the external longitudinal limits (l1and l2) of the groove; c) position a digital caliper with square tips on the longitu
49、dinal limits (l1and l2) of the groove. Measure and record the dimension of the cord (l ) to the nearest 0,1 mm. If two grooves are made in a specimen, the result will be the one with a higher value obtained. The result of the test will be obtained by calculating the mean value and the standard deviation of the higher individual values of groove obtained from each specimen and then rounding it to the nearest 0,5 mm. Figure 4 A groove on a t
