作者:标准资料网 时间:2024-05-21 05:46:33   浏览:8240   来源:标准资料网

【英文标准名称】:StandardTestMethodforTrueSpecificGravityofRefractoryMaterialsbyGas-ComparisonPycnometer
【原文标准名称】:用气体比重法测定耐火材料真实比重的标准试验方法
【标准号】:ASTMC604-2002(2007)e1
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:C08.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:gascomparisonpycnometer;hydratablematerials;refractorymaterials;truespecificgravity;Gascomparisonpycnometer;Refractories(general);Specificgravity--refractorymaterials;Truespecificgravity
【摘要】:Thetruespecificgravityofamaterialistheratioofitstruedensity,determinedataspecifictemperature,tothetruedensityofwater,determinedataspecifictemperature.Thus,thetruespecificgravityofamaterialisaprimarypropertywhichisrelatedtochemicalandmineralogicalcomposition.ThistestmethodisparticularlyusefulforhydratablematerialswhicharenotsuitablefortestwithTestMethodC135.Forrefractoryrawmaterialsandproductsthetruespecificgravityisausefulvaluefor:classification,detectingdifferencesinchemicalcompositionbetweensupposedlylikesamples,indicatingmineralogicalphasesorphasechanges,calculatingtotalporositywhenthebulkdensityisknown,andforanyothertestmethodthatrequiresthisvalueforthecalculationofresults.Thistestmethodisaprimarystandardmethodwhichissuitableforuseinspecifications,qualitycontrol,andresearchanddevelopment.Itcanalsoserveasarefereetestmethodinpurchasingcontractsoragreements.Fundamentalassumptionsinherentinthistestmethodarethefollowing:Thesampleisrepresentativeofthematerialingeneral,Thetotalsamplehasbeenreducedtotheparticlesizespecified,Nocontaminationhasbeenintroducedduringprocessingofthesample,Theignitionofthesamplehaseliminatedallfreeorcombinedwaterwithoutinducingsinteringoralteration,Aninertgas(helium)hasbeenusedinthetest,andThetestmethodhasbeenconductedinameticulousmanner.Deviationfromanyoftheseassumptionsnegatestheusefulnessoftheresults.IninterpretingtheresultsofthistestmethoditmustberecognizedthatthespecifiedsampleparticlesizeissignificantlyfinerthanspecifiedforTestMethodC135.Eventhisfinerparticlesizeforthesampledoesnotprecludethepresenceofsomeclosedpores,andtheamountofresidualclosedporesmayvarybetweenmaterialsorevenbetweensamplesofthesameorlikematerials.Thevaluesgeneratedbythistestmethodmay,therefore,beverycloseapproximationsratherthanaccuraterepresentationsoftruespecificgravities.Thus,comparisonsofresultsshouldonlybejudiciouslymadebetweenlikematerialstestedbythistestmethodorwithfullrecognitionofpotentiallyinherentdifferencesbetweenthematerialsbeingcomparedorthetestmethodused.1.1Thistestmethodcoversthedeterminationofthetruespecificgravityofsolidmaterials,andisparticularlyusefulformaterialsthateasilyhydratewhicharenotsuitablefortestwithTestMethodC135.ThistestmethodmaybeusedasanalternateforTestMethodC135,TestMethodC128,andTestMethodC188fordeterminingtruespecificgravity.1.2Units8212;ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.2.1Exception8212;In7.3theequivalentSIunitisexpressedinparenthesis.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q40
【国际标准分类号】:81_080
【页数】:3P.;A4
【正文语种】:英语