ASTM_D_5817_-_03a_2014.pdf

Designation:D581703a(Reapproved 2014)Standard Practice forCarbon Black,PelletedReduction,Blending,and Drying ofGross Samples for Testing1This standard is issued under the fixed designation D5817;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 practice describes the procedure for blending ofpelleted carbon black,the procedure for the reduction of grosssamples of pelleted carbon black to the appropriate size fortesting and the preparation of the sample for testing.Thesetechniques are intended to minimize variations in measuredcharacteristics between test samples.Standard terminologyrelating to carbon black samples is found in TerminologyD3053.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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:2D412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD1506 Test Methods for Carbon BlackAsh ContentD1508 Test Method for Carbon Black,Pelleted Fines andAttritionD1509 Test Methods for Carbon BlackHeating LossD1510 Test Method for Carbon BlackIodine AdsorptionNumberD1511 Test Method for Carbon BlackPellet Size Distri-butionD1512 Test Methods for Carbon BlackpH ValueD1513 Test Method for Carbon Black,PelletedPour Den-sityD1514 Test Method for Carbon BlackSieve ResidueD1618 Test Method for Carbon Black ExtractablesTransmittance of Toluene ExtractD1619 Test Methods for Carbon BlackSulfur ContentD1765 Classification System for Carbon Blacks Used inRubber ProductsD1799 Practice for Carbon BlackSampling PackagedShipmentsD1900 Practice for Carbon BlackSampling Bulk Ship-mentsD2414 Test Method for Carbon BlackOil AbsorptionNumber(OAN)D3053 Terminology Relating to Carbon BlackD3191 Test Methods for Carbon Black in SBR(Styrene-Butadiene Rubber)Recipe and Evaluation ProceduresD3192 Test Methods for Carbon Black Evaluation in NR(Natural Rubber)D3265 Test Method for Carbon BlackTint StrengthD3493 Test Method for Carbon BlackOil AbsorptionNumber of Compressed Sample(COAN)D5230 Test Method for Carbon BlackAutomated Indi-vidual Pellet HardnessD6556 Test Method for Carbon BlackTotal and ExternalSurface Area by Nitrogen Adsorption3.Summary of Test Methods3.1 Test Method AReduction of Sample Size:3.1.1 The gross bulk sample is poured through the rifflesample splitter.Aportion of the sample is reintroduced into thesplitter as many times as necessary to reduce the gross sampleto the size desired for the intended test portion.The test portionmay not be homogeneous.3.2 Test Method BBlending of Carbon Black:3.2.1 The gross sample is poured through the riffle samplesplitter a minimum of four times in a specific sequence toprepare a homogeneous test portion.The black must becross-blended to accomplish a homogeneous portion for test-ing.3.3 Test Method CDrying of Carbon Black:3.3.1 For all test methods listed in Section 2 except:theFines and Attrition(Test Method D1508),Heating Loss(TestMethods D1509),Pellet Size Distribution(Test Method1This practice is under the jurisdiction of ASTM Committee D24 on CarbonBlack and is the direct responsibility of Subcommittee D24.61 on Carbon BlackSampling and Statistical Analysis.Current edition approved June 1,2014.Published November 2014.Originallyapproved in 1995.Last previous edition approved in 2008 as D5817 03a(2008).DOI:10.1520/D5817-03AR14.2For 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 D1511),pH Value(Test Methods D1512),Pour Density(TestMethod D1513),Sieve Residue(Test Method D1514),SulfurContent(Test Methods D1619),and Pellet Hardness(TestMethod D5230)test methods,the sample must be dried beforetesting begins.NOTE1Samples that are known to be dry(1.0%moisture)due toprior preparation or production processing may be tested without furtherdrying.4.Significance and Use4.1 Several test methods for carbon black require thereduction in sample size or the blending of the test sample toreduce the variation of the measured characteristic.Otherfactors being equal,larger samples will tend to be morerepresentative of the total supply.This practice providesprocedures for reducing the large sample obtained from the bagand bulk sampling practices to a conveni