ASTM_C_501_-_84_2015.pdf

Designation:C50184(Reapproved 2015)Standard Test Method forRelative Resistance to Wear of Unglazed Ceramic Tile bythe Taber Abraser1This standard is issued under the fixed designation C501;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method2overs the establishment of an abrasivewear index by determination of the loss of weight resultingfrom abrasion of unglazed ceramic tile.It is applicable to tiledescribed in Definitions C242.c1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3C242 Terminology of Ceramic Whitewares and RelatedProducts2.2 Federal Specification:SS-T308b Tile,Floor,Wall,and Trim Units,Ceramic43.Terminology3.1 Definitions:3.1.1 For definitions of terms used in this test method,seeTerminology C242.4.Summary of Test Method4.1 This test method consists of mounting the tile specimensin suitable holders,attaching the mounted holders to thespindle of the Taber Abraser,and subjecting the specimens toa prescribed number of revolutions under abrasive wheels ofspecified coarseness and under a definite applied load.Fromthe loss of weight due to abrasion,the abrasive wear index iscalculated by a given formula.5.Apparatus5.1 Taber Abrading Machine,5equipped with replaceablehard abrasive H-22 Calibrade wheels,which can be loaded byweights.5.2 Vacuum Pick-Up,to remove the abraded material whilethe machine is in operation.5.3 Revolution Counter.5.4 Wheel Refacer.55.5 Balance,having a sensitivity of 0.05 g.6.Sampling6.1 Four tile specimens 4 in.(102 mm)square or larger,orif ceramic mosaic tile,sufficient tile for four specimen assem-blies 4 in.square shall constitute a sample and shall be chosen1This test method is under the jurisdiction ofASTM Committee C21 on CeramicWhitewares and Related Products and is the direct responsibility of SubcommitteeC21.06 on Ceramic Tile.Current edition approved Dec.15,2015.Published December 2015.OriginallypublishedasC501 62.Lastpreviouseditionapprovedin2009asC501 84(2009).DOI:10.1520/C0501-84R15.2This test method is basically the same as the abrasion test given in FederalSpecification SS-T-308b,except two minor changes have been made:(1)The number of specimens required by the test is changed from three to four,so that the condition of the abrasive wheels used can be specified as new and oncedressed.The diameters of wheels redressed more than once vary greatly andnonuniformly,introducing an unnecessary variation in test results.(2)The bulk specific gravity of the tile tested has been eliminated fromcalculation of the wear index.The probable resulting maximum error of 212%in thewear-index value,when an average is assumed,does not justify the cumbersomedeterminations of bulk specific gravity of the specimen.Measurements of bulkspecific gravities of twenty different unglazed tile from eight differentmanufacturers,including quarry tile,porcelain tile,natural clay tile and conductivetile showed a range of bulk specific gravity from 2.34 to 2.47,except for that ofconductive tile which was as high as 2.98.The average of 2.40 was selected as aconstant to be substituted for G in the SS-T-308b formula to obtain the formula inthis test method.Therefore,to obtain the value 88,the constant of 36.75 in theSS-T-308b test has been multipled by 2.40 to keep the wear indexes of both tests onthe same numerical scale.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from Standardization Documents Order Desk,DODSSP,Bldg.4,SectionD,700RobbinsAve.,Philadelphia,PA19111-5098,http:/www.dodssp.daps.mil.5The sole source of supply of the Tabor Abraser and the Model 200 wheelrefacer known to the committee at this time is Teledyne Taber Instrument Corp.,17Goundry St.,North Tonawanda,NY 14150.If you are aware of alternativesuppliers,please provide this information to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of the responsibletechnical committee,1which you may attend.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 from the lot to be tested.Only tile that show no vi