1、Designation:C140798(Reapproved 2016)Standard Practice forCalculating Areas,Volume,and Linear Change of RefractoryShapes1This standard is issued under the fixed designation C1407;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 practice covers the methods of calculating areas,volumes,and linear changes of irregularly shaped refractoryspeci
3、mens.1.2 Areas of irregular(both conventional and shaped)speci-mens are required for determining the creep of certain refrac-tory products.1.3 Linear and volume changes or irregularly shaped refrac-tories are required for determining reheat change.1.4 The values stated in SI units are to be regarded
4、 as thestandard.1.5 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 safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.
5、Referenced Documents2.1 ASTM Standards:2C20 Test Methods for Apparent Porosity,Water Absorption,Apparent Specific Gravity,and Bulk Density of BurnedRefractory Brick and Shapes by Boiling WaterC830 TestMethodsforApparentPorosity,LiquidAbsorption,Apparent Specific Gravity,and Bulk Densityof Refractory
6、 Shapes by Vacuum Pressure3.Significance and Use3.1 Fireclay steel-teeming nozzles and sleeves are classifiedby volume reheat change.Bloating of some refractories resultsin irregular reheat dimensions,which are difficult to measure.This practice determines the volume without depending uponphysical l
7、inear measurements.3.2 Blast furnace checkers that have irregular cross-sectionsare classified by“creep properties.”This practice determinesthe average cross-sectional area without requiring area mea-surements.4.Procedure4.1 The test specimens shall have their volume(VA)pre-determined using the stan
8、dard procedure described in TestMethods C20 or C830.4.2 Dry the specimens to constant weight.4.3 Weigh the specimens to the nearest 0.1 g and record asW.4.4 If the specimens have parallel faces(such as groundsurfaces for applying load for creep data)measure the length tothe nearest 0.02 in.(0.5 mm)a
9、nd record as L.5.Calculation5.1 Area of Creep Specimens(Irregular Cross-Sections):5.1.1areaA!5volumeV!C20 or C830!cm3lengthL!cm!5 cm21024m2!(1)5.1.2volumeV!5weightW!g!bulk densityg/cm3!5 cm31026m3!(2)5.1.3 Illustration:Weight(W)=375.2 gBulk Density=2.56 g/cm3(Mg/m3)Length(L)=10.795 cm(102m)V 5375.22
10、.565 146.56 cm31026m3!(3)A 5VolumeLength5146.5610.7951022m!5 13.58 cm21024m2!(4)5.2 Volume Change of Reheat Specimens:%volume changeV!5VB2 VAVA3100(5)where:VA=original volume,cm3(106m3)VB=final reheat volume,cm3(106m3),and1This practice is under the jurisdiction ofASTM Committee C08 on Refractoriesa
11、nd is the direct responsibility of Subcommittee C08.03 on Physical Properties.Current edition approved June 1,2016.Published June 2016.Originallyapproved in 1998.Last previous edition approved in 2011 as C1407 98(2011).DOI:10.1520/C1407-98R16.2For referenced ASTM standards,visit the ASTM website,www
12、.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 Conshohocken,PA 19428-2959.United States1 V=(VB-VA)chan
13、ge in volume from State A to State B(volume obtained from either Test Method C20 orTest Method C830).5.3 Converting%Volume Change V to%Linear ChangeL of Reheat Specimens:5.3.1 If volume change is negative(shrinkage)then:%linear changeL!5 21 211V/100!1/3#3100(6)5.3.1.1 Illustrate for an 8%volume chan
14、ge(shrinkage)as:%linear changeL!5 21 21 2 0.08!1/3#3100(7)521 20.92!1/3#3100521 20.973!#3100520.02731005 22.7%5.3.2 If the volume change is positive(expansion)then:%linear changeL!511%V/100!1/32 1#3100(8)5.3.2.1 Illustrate for a+8%volume change(expansion)as:%linear changeL!5110.08!1/32 1#3100(9)51.0
15、262 1!310050.02631005 2.6%NOTE1The linear reheat change calculated from the volume changeis only an approximation and may be different from a measured value.6.Keywords6.1 area;checkers;creep;Fireclay nozzle;Fireclay sleeves;irregular shapes;linear change;refractories;reheat change;volume;volume chan
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