【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】:Connectorsetsandinterconnectcomponentstobeusedinopticalfibrecommunicationsystems-Productspecifications-Part6-2:SC-RJsinglemodeterminatedonIEC60793-2-50categoryB1.1andB1.3singlemodefibre,categoryU;GermanversionEN50377-6-
【原文标准名称】:光纤通信系统中使用的连接器组件和互连元件.产品规范.第6-2部分:SC-RJ单模端接在IEC60793-2-50B1.1和B1.3类单模光纤、U类
【标准号】:EN50377-6-2-2007
【标准状态】:现行
【国别】:
【发布日期】:2008-03-01
【实施或试行日期】:2008-03-01
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:适配器;颜色;通信系统;连接件;阻尼(波);数据连接系统;数据传送;尺寸;电插头;电气工程;电子工程;电子设备及元件;环境可持续性;紧固件;纤维光学;光纤;玻璃纤维电缆;作标记;机械性能;单模纤维;多模纤维;光学特性;光波导;工作性能;性能要求;插头;产品规范;产品标准;质量保证;可置换性;回程损耗;规范(验收);试验;型式
【英文主题词】:Adapters;Colour;Communicationsystems;Connections;Damping;Datalinksystem;Datatransfer;Dimensions;Electricplugs;Electricalengineering;Electronicengineering;Electronicequipmentandcomponents;Environmentalsustainability;Fasteners;Fibreoptics;Glassfibrecables;Marking;Mechanicalproperties;Monomodefibres;Multimodefibres;Opticalproperties;Opticalwaveguides;Performanceinservice;Performancerequirements;Plugs;Productspecifications;Productstandards;Qualityassurance;Replaceability;Returnloss;Specification(approval);Testing;Types
【摘要】:
【中国标准分类号】:L23
【国际标准分类号】:33_180_20
【页数】:37P.;A4
【正文语种】:英语