【英文标准名称】:StandardTestMethodsforApparentPorosity,WaterAbsorption,ApparentSpecificGravity,andBulkDensityofBurnedRefractoryBrickandShapesbyBoilingWater
【原文标准名称】:用沸水法测定烧过的耐火砖和异型砖的表观多孔性,吸水性,表观比重及松密度的测试方法
【标准号】:ASTMC20-2000(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:2000
【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】:apparentporosity;apparentspecificgravity;bulkdensity;refractoryshapes;waterabsorption;waterboil;Boilingwatertest;Bulkdensity;Burnedrefractorybrick;Density--refractorymaterials;Porosity--apparent;Refractories(brickandshapes)-
【摘要】:Apparentporosity,waterabsorption,apparentspecificgravity,andbulkdensityareprimarypropertiesofburnedrefractorybrickandshapes.Thesepropertiesarewidelyusedintheevaluationandcomparisonofproductqualityandaspartofthecriteriaforselectionanduseofrefractoryproductsinavarietyofindustrialapplications.Thesetestmethodsareusedfordetermininganyoralloftheseproperties.Thesetestmethodsareprimarystandardmethodswhicharesuitableforuseinqualitycontrol,researchanddevelopment,establishingcriteriaforandevaluatingcompliancewithspecifications,andprovidingdatafordesignpurposes.Fundamentalassumptionsinherentinthesetestmethodsarethatthetestspecimensarenotattackedbywater,thetestspecimensconformtotherequirementsforsize,configuration,andoriginalfaces,theopenporesofthetestspecimensarefullyimpregnatedwithwaterduringtheboilingtreatment,andtheblottingofthesaturatedtestspecimensisperformedasspecifiedinaconsistentanduniformmannertoavoidwithdrawingwaterfromthepores.Deviationfromanyoftheseassumptionsadverselyaffectsthetestresults.Inlaboratorystudiesinvolvingcastablespecimen,abiaswasnotedbetweenformed2by2by2x2013;in.(50by50by50x2013;mm)andspecimensthatwerequarteredfromlarger9by4.5by2.5(228by114by64mm)castspecimens.Additionally,anerrorintheapparentporositydeterminationoncastableswasfoundwheneverthespecimenswereheatedto1500x00B0;F(816x00B0;C)andthenexposedtowaterasasaturationmedia(TestMethodC830).Theerrorwasattributedtoreactivityofcementwithwaterandsubsequentre-hydrationofcementphases.Thehigherthecementlevelofthecastable,thegreatertheerrornoted.Itwasconcludedthatanerrorinporosityvaluescouldoccurforrefractorymaterialshavingapotentialtoformhydratedspecieswithwater.Certainprecautionsmustbeexercisedininterpretingandusingresultsfromthesetestmethods.Allfourpropertyvaluesareinterrelatedbyatleasttwoofthethreebasedatavaluesgeneratedduringtesting.Thus,anerrorinanybasedatavaluewillcauseanerrorinatleastthreeofthepropertyvaluesforagiventestspecimen.Certainoftheproperties,thatis,apparentspecificgravityandbulkdensity,arefunctionsofotherfactorssuchasproductcomposition,compositionalvariabilitywithinthesameproduct,imperviousporosity,andtotalporosity.Generalizationsonorcomparisonsofpropertyvaluesshouldonlybejudiciouslymadebetweenlikeproductstestedbythesetestmethodsorwithfullrecognitionofpotentiallyinherentdifferencesbetweentheproductsbeingcomparedorthetestmethodused.1.1Thesetestmethodscoverthedeterminationofthefollowingpropertiesofburnedrefractorybrick:1.1.1Apparentporosity,1.1.2Waterabsorption,1.1.3Apparentspecificgravity,and1.1.4Bulkdensity.1.2Thesetestmethodsarenotapplicabletorefractoriesattackedbywater.1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q40
【国际标准分类号】:
【页数】:3P.;A4
【正文语种】:英语


【英文标准名称】:Plugconnectors,squaretype;ratings,requirements,test
【原文标准名称】:方形结构接插件.参数.要求.试验
【标准号】:DIN43650T.2-1983
【标准状态】:作废
【国别】:
【发布日期】:
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:
【国际标准分类号】:
【页数】:
【正文语种】: