【英文标准名称】:StandardTestMethodforMethyleneBlueIndexofClay
【原文标准名称】:粘土的亚甲蓝指数的标准试验方法
【标准号】:ASTMC837-1999(2003)
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:C21.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:索引;粘土;亚甲蓝;试验;陶瓷
【英文主题词】:ceramicmaterials;clay;color;methyleneblueindex;visualexamination-ceramicmaterials;methyleneblueindexofclay
【摘要】:Testsrunonmanyclaysgenerallyindicatethatastraight-linerelationshipexistsbetweenthemethyleneblueindex(MBI)andsuchfundamentalclaypropertiesascationexchangecapacity,drybondstrength,andcastingrate.Wherethecolloidalportionoftheclayiskaolinite,thereisalsoadirectcorrelationwithspecificsurface(asdeterminedbynitrogenadsorption).Wherethecolloidalportioncontainssignificantamountsofilliteormontmorillonite,thesameclosecorrelationdoesnotexist.TheMBIbettercorrelateswiththeceramic-formingpropertiesthandoesthespecificsurface.Thatportionofaclaylyingwithinthecolloidalrange(generallydefinedasthe0.5-to0.001-x03BC;mrange),determinesthestrictlycolloidalpropertiesoftheclayand,togetherwiththeamountandtypeoforganicmaterialassociatedwiththeclayandthe2-to0.2-x03BC;mfraction,largelydeterminesthepropertiesoftheclaywhenusedinceramic-formingprocesses.Whilethespecificsurfaceofaclayisafunctionoftheparticlesizeandmorphologyandarelationshipexistsbetweendyeadsorptionandspecificsurface,theMBIshouldnotbeconsideredtobeaparticlesizeanalysissincethevalueobtainedisdominatedbythecharacterofonlytheveryfineendoftheparticlesizedistribution.Thisproceduredescribesthedeterminationofthedyeadsorption(inthiscase,methyleneblue)ofaclay.1.1Thistestmethodcoversthemeasurementoftheadsorptionofmethylenebluedyebyaclay,whichiscalculatedasamethyleneblueindexforaclay.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q17
【国际标准分类号】:91_100_15
【页数】:2P.;A4
【正文语种】: