1、Designation:C704/C704M15Standard Test Method forAbrasion Resistance of Refractory Materials at RoomTemperature1This standard is issued under the fixed designation C704/C704M;the number immediately following the designation indicates the yearof original adoption or,in the case of revision,the year of
2、 last revision.A number in parentheses indicates the year of last reapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers the determination of relativeabrasion resistance of refractory brick at room temperature.This tes
3、t method can also be applied to castable refractories(see Metric Dimensions,Practice C861 and Practice C865)andplastic refractories(see Practice C1054).1.2 UnitsWhen values are stated in both SI and inch-pound units,the units are to be regarded separately as standard.The values stated in each system
4、 may not be exact equivalents;therefore,use each system independently of the other.Com-bining values from the two systems may result in non-conformance with the standard.Several values are stated onlyin SI units as a matter of convention and to permit comparisonof results.Included are the abrading m
5、edia weight(grams),specimen weight(grams),specimen weight loss due to abra-sion(grams),and the resultant volume loss(cubic centimeters).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 estab
6、lish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2A681 Specification for Tool Steels AlloyC134 Test Methods for Size,Dimensional Measurements,and Bulk Density of Refractory Brick and Insulat
7、ingFirebrickC179 Test Method for Drying and Firing Linear Change ofRefractory Plastic and Ramming Mix SpecimensC861 Practice for Determining Metric Dimensions of Stan-dard Series Refractory Brick and ShapesC862 Practice for Preparing Refractory Concrete Specimensby CastingC865 Practice for Firing Re
8、fractory Concrete SpecimensC1036 Specification for Flat GlassC1054 Practice for Pressing and Drying Refractory Plasticand Ramming Mix SpecimensD4285 Test Method for Indicating Oil or Water in Com-pressed AirE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE691 Practice for Co
9、nducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 American Society of Mechanical Engineers(ASME)Standard:B40.100 Pressure Gauges and Gauge Attachments2.3 ASTM Adjuncts:Abrasion Tester(1 dwg)33.Summary of Test Method3.1 This test method measures the volume of material in
10、cubic centimeters abraded from a flat surface at a right angle toa nozzle through which 1000 g of size-graded silicon carbidegrain is blasted by air at a prescribed air pressure.4.Significance and Use4.1 This test method measures the relative abrasion resis-tance of various refractory samples under
11、standard conditionsat room temperature.4.2 The abrasion resistance of a refractory material providesan indication of its suitability for service in abrasive environ-ments.4.3 The results obtained by this test method could bedifferent than those obtained in service because of the differentconditions
12、encountered.5.Interferences(Factors known to Affect Results)5.1During development,a ruggedness test was performedusing 114 by 114 by 12.7 mm 412by 412by12in.float glass1This test method is under the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C0
13、8.03 on PhysicalProperties.Current edition approved March 1,2015.Published April 2015.Originallyapproved in 1972.Last previous edition approved in 2014 as C704/C704M 14.DOI:10.1520/C0704_C0704M-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at s
14、erviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Detailed prints for the construction of the test chamber are available at anominal cost from ASTM International Headquarters.Order Adjunct No.ADJC0704.An acceptable tes
15、t chamber can be made from a weatherproof electricalswitch box.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 plates conforming to Specification C1036.Several factors werefound to cause statistically significant effects on measuredresult
16、s(see Section 10).5.1.1 Nozzle Tube Inside DiameterVariation in the insidediameter of the flint glass nozzle tube statistically affected theabrasion values obtained on the glass plate.Ideal glass tubeinside diameter is 4.8 mm.Glass tube lots purchased as 7 mmoutside diameter tube with a nominal 1.1 mm wall thicknesscan have inside diameters ranging from 4.6 mm to 5.0 mm.Forthe ruggedness test,flint glass tube inside diameters of 4.7 mmand 4.9 mm were used.Take the statistically significant effec
