1、Designation:C122309(Reapproved 2014)Standard Test Method forTesting of Glass Exudation from AZS Fusion-CastRefractories1This standard is issued under the fixed designation C1223;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the yea
2、r 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 method covers a procedure for causing theexudation of a glassy phase to the surface of fusion-castspecimens
3、by subjecting them to temperatures correspondingto glass furnace operating temperatures.1.2 This test method covers a procedure for measuring theexudate as the percent of volume increase of the specimen aftercooling.1.3 UnitsThe values stated in inch-pound units are to beregarded as standard.The val
4、ues given in parentheses aremathematical conversions to SI units that are provided forinformation only and are not considered standard.1.3.1 ExceptionThe balance required for this test methoduses only SI units(Section 6).1.4 This standard does not purport to address all of thesafety concerns,if any,
5、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:2C20 Test Methods for Apparent Porosity,Water Absorption
6、,Apparent Specific Gravity,and Bulk Density of BurnedRefractory Brick and Shapes by Boiling Water3.Significance and Use3.1 This test method was developed for use both by manu-facturers as a process control tool for the production of AZSfusion-cast refractories,and by glass manufacturers in theselect
7、ion of refractories and design of glass-melting furnaces.3.2 The results may be considered as representative of thepotential for an AZS refractory(specifically,in the testedregion)to contribute to glass defect formation during thefurnace production operation.3.3 The procedures and results may be app
8、lied to otherrefractory types or applications(that is,reheat furnace skid railbrick)in which glass exudation is considered to be important.4.Apparatus and Materials4.1 ScaleA laboratory scale or balance rigged for suspen-sion of specimens for dry/wet weight determinations to anaccuracy of 0.01 g.4.2
9、 KilnAn electric kiln to accommodate several 4-in.(102-mm)specimen cores placed vertically on end,and forservice at 2750F(1510C),with a variation of 10F(6C).4.3 FoilCups formed from 214-in.(56-mm)squares ofplatinum foil(Pt,5%Au alloy,0.003-in.(0.076-mm)thick).One cup required per specimen.4.4 AZS Ca
10、stingA virgin casting having no prior thermalhistory except that of its own formation,and of a size andcasting process equivalent to the intended application(such asan arch block)in which exudation potential is of interest.5.Test Specimens and Sampling5.1 Specimens may be removed from the original c
11、astingeither as drilled cores or as sawed bars,depending on labora-tory capability.Specimen cores or bars should be 4-in.(102-mm)long and either 1 in.(25.4 mm)in diameter or 1 by 1 in.(25.4 by 25.4 mm)in cross-section.The length dimension ofthe specimen should be perpendicular to the surface of theb
12、lock from which it is removed.5.2 The dimensions of the prepared specimen core are notcritical but should be maintained as specified,with minimalspecimen-to-specimen variation.Excessive thickness can pre-vent isothermal heating within the specimen.Height and widthcan affect the positioned stability
13、of the specimen in the kilnduring heating.5.3 The size of the original casting may influence theresults.Evaluations of the product should be made relative toonly the intended application.For example,a convenientlysized bottom paver might not be representative of a larger1This test method is under th
14、e jurisdiction of ASTM Committee C08 onRefractories and is the direct responsibility of Subcommittee C08.10 on Refracto-ries for Glass.Current edition approved Sept.1,2014.Published November 2014.Originallyapproved in 1992.Last previous edition approved in 2009 as C1223 09.DOI:10.1520/C1223-09R14.2F
15、or 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West
16、Conshohocken,PA 19428-2959.United States1 superstructure casting because(for example)casting moldtypes and solidification rates may have been different duringmanufacture.5.4 The location and depth of specimens within the originalcasting can influence the results.Regions closely underlyingthe surface of the casting(particularly near the corners andedges)are thermally quenched and have aligned microstruc-tures that are atypical of more slowly cooled regions.Deeper ina casting,glass phase pockets a
