1、Designation:C241/C241M151Standard Test Method forAbrasion Resistance of Stone Subjected to Foot Traffic1This standard is issued under the fixed designation C241/C241M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of last r
2、evision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1NOTENote 3 was removed editorially in August 2015.1.S
3、cope1.1 This test method covers the determination of the abra-sion resistance of all types of stones for floors,steps,andsimilar uses where the wear is caused by the abrasion of foottraffic.1.2 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The valu
4、es stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.1.2.1 ExceptionThe formula for calculation of the resultof this test method relies on the use of SI u
5、nits;all measure-ments of weight in this test method shall be recorded in SIunits.See 9.1 and 10.1.1.3 This standard does not purport to address the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices
6、and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C97 Test Methods for Absorption and Bulk Specific Gravityof Dimension StoneC119 Terminology Relating to Dimension StoneC1353 Test Method for Abrasion Resistance of DimensionStone Subjected
7、 to Foot Traffic Using a Rotary PlatformAbraserC1799 Guide to Dimension Stone Test Specimen Samplingand Preparation3.Terminology3.1 DefinitionsAll definitions are in accordance with Ter-minology C119.4.Significance and Use4.1 This test method is useful in indicating the differences inabrasion resist
8、ance between the various building stones.Thistest method also provides one element in comparing stones ofthe same type.5.Apparatus5.1 The abrasion testing apparatus shown in Fig.1 shall beused.This apparatus consists essentially of a power-drivengrinding lap,A,10 in.250 mm in diameter,which is revol
9、vedat 45 rpm;three specimen holders,B,with superimposedweights;gears,C,for revolving the specimen;and a means offeeding abrasive at a constant rate to the lap.The guide rings,D,are clamped in position slightly above the specimen holders,and the 2000 g weight bearing on the specimen is the combinedwe
10、ight of the specimen holder,vertical shaft above with theattached spur gear,and a weight hopper,E,containing addi-tional adjustment weights.The frame,F,carrying the guiderings is adjustable vertically to accommodate different speci-men thicknesses.Gears,C,are adjusted on the shafts for eachspecimen
11、thickness,so that they are slightly above the plate,G,throughout the test.6.Sampling6.1 The sample may be selected by the purchaser or hisauthorized agent but shall represent the average quality of thetype or grade of stone under consideration.It shall be ofsufficient size to permit the preparation
12、of at least three testspecimens,and one face should have the finish to be exposedto traffic.The sample preferably should be 1 in.25 mm thickand 8 in.200 mm square.NOTE1Refer to Guide C1799 for additional information on selecting,preparing,and conditioning test specimens.7.Test Specimens7.1 At least
13、three specimens 2 in.50 mm square andpreferably 1 in.25 mm in thickness shall be sawed from the1This test method is under the jurisdiction of ASTM Committee C18 onDimension Stone and is the direct responsibility of Subcommittee C18.01 on TestMethods.Current edition approved May 1,2015.Published July
14、 2015.Originally approvedin 1950.Last previous edition approved in 2015 as C24115.DOI:10.1520/C0241_C0241M-15E01.2For 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 stan
15、dards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 FIG.1 Apparatus for Abrasion Resistance Test of StoneC241/C241M 1512 sample.The sharp edges shall be rounded by grinding to aradius of approxim
16、ately132in.1 mm in order to preventcrumbling during the test.8.Conditioning8.1 Dry the specimens for 48 h in a ventilated oven at atemperature of 140 6 4F 60 6 2C.At the 46th,47th,and48th hour,weigh the specimens to ensure that the weight is thesame.If the weight continues to drop,continue to dry thespecimens until there are three successive hourly readings withthe same weight.After removing the specimens from the oven,cool them to room temperature in a desiccator before testingthem.9.Procedure9