1、Designation:C40112(Reapproved 2018)Standard Classification ofAlumina and Alumina-Silicate Castable Refractories1This standard is issued under the fixed designation C401;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、 revision.A number in parentheses indicates the year of last reapproval.Asuperscript 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.1.Scope1.1 This classification covers alumina and alu
3、mina-silicatecastable refractories that,when tempered with water,willdevelop structural strength by chemical action.1.2 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 sa
4、fety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of
5、International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C113 Test Method for Reheat Change of Refractory BrickC133 Test Methods for Cold Crushing Strength and Modu-lus of Rupture of
6、RefractoriesC134 Test Methods for Size,Dimensional Measurements,and Bulk Density of Refractory Brick and InsulatingFirebrickC862 Practice for Preparing Refractory Concrete Specimensby CastingC865 Practice for Firing Refractory Concrete Specimens3.Significance and Use3.1 Alumina and alumina-silicate
7、castable refractories areproduced to yield property characteristics commensurate withdifferent end-use properties.Volume stability,modulus ofrupture,bulk density,and lime content have become usefulmeasures to distinguish various alumina and alumina-silicatecastable formulations for initial fitness f
8、or service.This clas-sification is considered useful for purchase specifications andfor quality control.4.Basis of Classification4.1 Alumina and alumina silicate castable refractories thatcontain a hydraulic setting cement and have a density of greaterthan 105 lb/ft3(1.68 g/cm3)may be classified by
9、the lime(CaO)content as contributed by the cement.The classificationsare shown in Table 1.While this standard only uses the limecontent as contributed by cement,other sources of lime may bepresent in the mix and may affect the performance of amaterial.4.2 Refractory castables classified as conventio
10、nal castablerefractories having a modulus of rupture after drying of at least300 psi(2.07 MPa)are normal strength,and those having atleast 600 psi(4.14 MPa)modulus of rupture are high-strengthtypes.They are further classified on the basis of volumestability of cast test brick when fired at the tempe
11、raturesprescribed in Table 2.4.3 Insulating Refractory CastablesThis class includesinsulating castable refractories which are classified on the basisof bulk density of dried cast test brick and volume stability ofsuch test brick when fired at the temperatures prescribed inTable 3.5.Test Methods5.1 T
12、he properties enumerated in this classification shall bedetermined in accordance with the following ASTM methods:5.1.1 Modulus of RuptureTest Methods C133 on test brickwith Practice C862,and after oven drying in accordance withthe Curing of Test Specimens section of Practice C862.Specimens should be
13、 fired as given in heating schedule ofPractice C865.5.1.2 Permanent Linear ChangeTest Method C113 onspecimens prepared in accordance with Practice C862 and firedas given in heating schedule of Practice C865.5.1.3 Bulk DensityTest Methods C134 on test brick pre-pared and oven dried in accordance with
14、 Practice C862 andfired as given in heating schedule of Practice C865.1This classification is under the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.92 The Joseph E.Kopanda Subcommittee for Editorial,Terminology,and Classification.Current edi
15、tion approved Oct.1,2018.Published October 2018.Originallyapproved in 1957.Last previous edition approved in 2012 as C401 12.DOI:10.1520/C0401-12R18.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards
16、volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Commi