ASTM C401-1991(2005) Standard Classification of Alumina and Alumina-Silicate Castable Refractories《可浇注耐火材料的分类方法》.pdf
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1、Designation: C 401 91 (Reapproved 2005)Standard Classification ofAlumina and Alumina-Silicate Castable Refractories1This standard is issued under the fixed designation C 401; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.1. Scope1.1 This classification covers alumi
3、na and alumina-silicatecastable refractories that, when tempered with water, willdevelop structural strength by chemical action.1.2 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 infor
4、mation onlyand are not considered standard.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 and determine the applicability of regulatorylimitati
5、ons prior to use.2. Referenced Documents2.1 ASTM Standards:2C113 Test Method for Reheat Change of Refractory BrickC 133 Test Methods for Cold Crushing Strength and Modu-lus of Rupture of RefractoriesC 134 Test Methods for Size, Dimensional Measurements,and Bulk Density of Refractory Brick and Insula
6、ting Fire-brickC 862 Practice for Preparing Refractory Concrete Speci-mens by CastingC 865 Practice for Firing Refractory Concrete Specimens3. Significance and Use3.1 Alumina and alumina-silicate castable refractories areproduced to yield property characteristics commensurate withdifferent end use p
7、roperties. Volume stability, modulus ofrupture, bulk density, and lime content have become usefulmeasures to distinguish various alumina and alumina-silicatecastable formulations for initial fitness for service. This clas-sification is considered useful for purchase specifications andfor quality con
8、trol.4. Basis of Classification4.1 Regular Castable RefractoriesThis class includesalumina and alumino-silicate castable refractories which con-tain hydraulic-setting cement and which have a total lime(CaO) content greater than 2.5 % on a calcined basis. Underthis class, castables having a modulus o
9、f rupture after drying ofat least 300 psi (2.07 MPa) are normal-strength, and thosehaving at least 600 psi (4.14 MPa) modulus of rupture arehigh-strength types. They are further classified on the basis ofvolume stability of cast test brick when fired at the tempera-tures prescribed in Table 1.4.2 Lo
10、w-Cement Castable RefractoriesThis class in-cludes alumina and alumino-silicate castable refractories whichcontain hydraulic-setting cement and which have a total lime(CaO) content of greater than 1.0 to 2.5 % on a calcined basis.4.3 Ultra-Low Cement Castable RefractoriesThis classincludes alumina a
11、nd alumino-silicate castable refractorieswhich contain hydraulic-setting cement and which have a totallime (CaO) content of greater than 0.2 to 1.0 % on a calcinedbasis.4.4 No-Cement Castable RefractoriesThis class includesalumina and alumino-silicate castable refractories which do notcontain hydrau
12、lic-setting cement and in which the bondingagent(s) contribute no significant amount of lime (CaO). Theproduct might contain up to 0.2 % total lime (CaO) on acalcined basis as contributed by the aggregate.4.5 Insulating Castable RefractoriesThis class includesinsulating castable refractories which a
13、re classified on the basisof bulk density of dried cast test brick and volume stability ofsuch test brick when fired at the temperatures prescribed inTable 2.1This classification is under the jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.92, T
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