ASTM_D_5502_-_00_2015.pdf

Designation:D550200(Reapproved 2015)Standard Test Method forApparent Density by Physical Measurements ofManufactured Anode and Cathode Carbon Used by theAluminum Industry1This standard is issued under the fixed designation D5502;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year 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 the determination of the appar-ent density of core samples from manufactured articles ofanode and cathode carbon used by the aluminum industry inthe production of aluminum.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C559 Test Method for Bulk Density by Physical Measure-ments of Manufactured Carbon and Graphite ArticlesIEEE/ASTM SI 10 American National Standard for MetricPractice3.Terminology3.1 Definitions:3.1.1 apparent densitythe mass per unit volume of asubstance,including voids inherent in the material tested.4.Significance and Use4.1 Apparent density as determined by this test method is abasic material property of importance in manufacturing andapplication of anode and cathode carbon.4.2 This test method can be used for quality and processcontrol,material characterization and description,and otherpurposes.5.Apparatus5.1 DryingOven,capableofbeingcontrolledto110 C 6 5 C(230 F 6 9 F).5.2 Desiccator,charged with indicating desiccant.5.3 Balance,capable of weighing to 6 0.01 g.5.4 Core Drill,drill equipped with a diamond core bitcapable of producing a core with true surface qualities and aminimum diameter of 50 mm.5.5 Cut-Off Saw,a saw capable of cutting the cored sampleresulting in a surface free of chips or gouges.5.6 Micrometer,a micrometer or other measuring devicecapable of measuring the diameter and length of the preparedsample to an accuracy of 0.001 cm.6.Preparation of Test Specimens6.1 Core drill samples with a minimum diameter of 50 mmfrom the manufactured article in the form of a right circularcylinder.6.2 Cut samples from the core to a minimum length of50 mm.It is recommended that triplicate samples from the corebe prepared,analyzed,and averaged to attain a result repre-sentative of the core apparent density.6.3 It is the responsibility of the user of this test method toestablish the quantity and location of core samples from themanufactured article for testing.6.4 No particle contained within the sample can be largerthan 19 mm.If particles are larger,the sample size or quantity,or both,shall be increased accordingly to give comparableaccuracy in the results.6.5 During the coring operation,use no lubricant having aboiling point above 100 C.All edges and faces of thespecimen should be free of chips or gouges.Ensure that thespecimen is free of any residue from the coring operation.Drythe specimen for a minimum of 2 h at 110 C,and then allow1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products,Liquid Fuels,and Lubricants and is the direct responsibility ofSubcommittee D02.05 on Properties of Fuels,Petroleum Coke and Carbon Material.Current edition approved Oct.1,2015.Published December 2015.Originallyapproved in 1994.Last previous edition approved in 2010 as D5502 00(2010).DOI:10.1520/D5502-00R15.2For 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 Conshohocken,PA 19428-2959.United States1 it to cool to 25 C 6 5 C in a desiccator.The specimen shallnot be removed from the desiccator until immediately prior toweighing.7.Procedure7.1 Weigh the prepared specimen to an accuracy of 0.01 gusing a balance or scale.7.2 Measure each dimension of the test specimen to anaccuracy of 0.001 cm.7.2.1 Measure the length at four points,90 apart on theperiphery of the circular end faces.Make two sets of diametermeasurements.Each set shall consist of four measurements,one at each end and two at intermediate points along an axialline.These sets shall lie at 90 to each other.Determine themean of the four length measurements(l)(see Fig.1)and themean of the eight diameter measurements(d)(see Fig.2).8.Calculation8.1 Record the mass to the nearest 0.01 g and the dimen-sions to the nearest 0.001 cm.Conversion factors are availablein IEEE/ASTM SI 10.8.2 The volume of the right circular cylinder specimen canb