1、Designation:D551597(Reapproved 2010)1Standard Test Method forDetermination of the Swelling Properties of Bituminous CoalUsing a Dilatometer1This standard is issued under the fixed designation D5515;the number immediately following the designation indicates the year oforiginal adoption or,in the case
2、 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.1NOTEAdded research report information to Section 14 editorially in September 2010.INTRODUCTIONThe principle
3、of this test method is that the final volume of char obtained at the conclusion of astandard dilatation test is dependent on the mass of coal in the coal pencil and on the radius of theretort tube.This test method incorporates a procedure which:determines the mass of air-dried coal inthe coal pencil
4、;provides a means to measure the average retort tube radii;and employs a means toreport coal expansion on an air dried coal weight basis.Other test methods used to determine the swelling properties of bituminous coals include the Ruhr(ISO 8264)and Audibert-Arnu(ISO 349)International Standard Organiz
5、ation(ISO)test methods.However these two ISO test methods provide consistently different values for percent dilatation andpercent contraction.Percent contraction and dilatation values obtained using the Audibert-Arnu testmethod are higher and lower respectively than those obtained using the Ruhr tes
6、t method.Thesedifferences have been attributed to trimming the length of the coal pencil from different ends.TheAudibert-Arnu test method specifies that the wider end of the coal pencil be trimmed while the Ruhrtest method specifies that the narrower end of the coal pencil be trimmed.1.Scope1.1 This
7、 test method specifies a procedure for the measure-ment of the swelling of bituminous coal using a dilatometer.1.2 The test method is limited in applicability to those coalswhich have a free swelling index 1 as determined in accor-dance with Test Method D720.1.3 The values stated in SI units(IEEE/AS
8、TM SI-10)are tobe regarded as standard.1.4 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 limi
9、tations prior to use.2.Referenced Documents2.1 ASTM Standards:2D720 Test Method for Free-Swelling Index of CoalD2013 Practice for Preparing Coal Samples for AnalysisD2234/D2234M Practice for Collection of a Gross Sampleof CoalIEEE/ASTM SI-10 Standard for Use of the InternationalSystem of Units(SI):T
10、he Modern Metric System2.2 International Standardization Organization(ISO)Stan-dards:3ISO 349 Hard Coal-Audibert-Arnu Dilatometer TestISO 8264 Hard CoalDetermination of the Swelling Prop-erties Using a Dilatometer1This test method is under the jurisdiction of ASTM Committee D05 on Coaland Coke and i
11、s the direct responsibility of Subcommittee D05.15 on MetallurgicalProperties of Coal and Coke.Current edition approved May 1,2010.Published May 2010.Originallyapproved in 1994.Last previous edition approved in 2004 as D5515 97(2004)2.DOI:10.1520/D5515-97R10E01.2For referenced ASTM standards,visit t
12、he 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.3Available from International Organization for Standardization(ISO),1,ch.dela Voie-Creuse,Case postale 5
13、6,CH-1211,Geneva 20,Switzerland,http:/www.iso.ch.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.Terminology3.1 Abbreviations:3.1.1 basement level reference mark height,BLRMht,thechar height as measured using the BLRM,after removing the
14、piston/retort assembly as a unit after completion of the test,expressed in millimetres.3.2 coal pencil,a 60-mm-long test specimen formed bycompression in a mold from coal which has been pulverized topass a 250-m(No.60)sieve.3.3 dry coal pencil mass,Mdry,the calculated mass of thetrimmed 60-mm-long c
15、oal pencil corrected for added water,expressed in grams.3.4 equivalent percent dilatation for 2.50 g of air dried coal,%D2.50,the calculated percent expansion for a 2.50-g,unmoistened,60-mm-long,coal pencil corrected for averagetube radii,expressed as a percentage.3.5 maximum contraction temperature
16、,T2,the temperatureat which the coal pencil starts swelling,expressed in degreesCelsius.For coals which exhibit contraction only,T2 is thetemperature at which the coal pencil reaches its minimum(seeFig.1).For coals that exhibit contraction only and are stillcontracting at 500C,T2 will be reported as taken at 500C(see Fig.1d).3.6 maximum dilatation temperature,T3,the temperature atwhich the coal pencil first reaches a maximum height afterswelling,expressed in degrees Celsius(see Fig.1).3.7 percen
