1、Designation:D537793(Reapproved 2012)Standard Classification forRubber Compounding MaterialsGround Coal1This standard is issued under the fixed designation D5377;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revisio
2、n.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 classification covers the compounding materialknown as ground coal.It is generally used in rubber com-pounds as a filler.1.2 There
3、 are three grades of ground coal based on particlesize,ash,and moisture.The selected values for these propertiesare suitable for use in a rubber compound.2.Referenced Documents2.1 ASTM Standards:2C1070 Test Method for Determining Particle Size Distribu-tion of Alumina or Quartz by Laser Light Scatte
4、ringD1208 Test Methods for Common Properties of CertainPigmentsD3174 Test Method for Ash in the Analysis Sample of Coaland Coke from CoalD3175 Test Method for Volatile Matter in the AnalysisSample of Coal and CokeD4371 Test Method for Determining the Washability Char-acteristics of Coal3.Significanc
5、e and Use3.1 Ground coal is commonly used as an inexpensive fillerin rubber compounds as a direct or partial replacement forcarbon black or as a diluent in the compound.3.2 Ground coal is very compatible with most rubbers and isvery easily mixed into the compound.4.Basis of Classification4.1 Particl
6、e size will have a direct effect on the modulus,tensile strength,and tear strength of the finished rubber.4.2 Ash in the coal will effect the specific gravity and highash can influence the curing characteristics of the rubber.4.3 Moisture in the ground coal at levels of 0.5%and abovecan cause bliste
7、rs and scorch.4.4 Lowering the density(specific gravity)will reducecompounding cost and affect volume loading.4.5 Ground coal for use in rubber compounds shall conformto the three grades listed in Table 1.5.Keywords5.1 filler;ground coal1This classification is under the jurisdiction of ASTM Committe
8、e D11 onRubber and is the direct responsibility of Subcommittee D11.20 on CompoundingMaterials and Procedures.Current edition approved May 1,2012.Published July 2012.Originally approvedin 1993.Last previous edition approved in 2007 as D5377 93(2007).DOI:10.1520/D5377-93R12.2For referenced ASTM stand
9、ards,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 19428-29
10、59.United States1 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of
11、such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for addit
12、ional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the AS
13、TM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained by contacting ASTM at the aboveaddres
14、s or at 610-832-9585(phone),610-832-9555(fax),or serviceastm.org(e-mail);or through the ASTM website(www.astm.org).Permission rights to photocopy the standard may also be secured from the ASTM website(www.astm.org/COPYRIGHT/).TABLE 1 Properties of Ground CoalProperty(Maximum Values)Grade IGrade IIGr
15、ade IIITest MethodAverage particle size(m)not weighted567C1070Top particle size(m)202428C1070Retained on 325 mesh(g)0.01000.04500.0950ARetained on 100 mesh(g)0.00030.00050.0010AAsh,%567D3174Alpha quartz,%1.01.502.0X-Ray DiffractionHeat loss,%(moisture)0.50.751.0D3174Acidity0.020.020.02D1208Volatile matter,%202020D3175Density(Mg/m3)(specific gravity)1.351.451.55D4371AMethod is being letter balloted in Subcommittee D11.11.Values based on 100 g samples.D5377 93(2012)2