【英文标准名称】:Aggregatesforconcrete;GermanversionEN12620:2002
【原文标准名称】:混凝土集料
【标准号】:EN12620-2002
【标准状态】:现行
【国别】:
【发布日期】:2003-04
【实施或试行日期】:
【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】:物理性能;道路;表观粒子密度;规范(验收);矿质集料;组分;建筑;施工材料;道路建筑;化学性质;特性;作标记;试验;质量保证;集料;混凝土用集料;灌充器械;表层;几何特性;混凝土;检验;定义
【英文主题词】:
【摘要】:混凝土集料
【中国标准分类号】:Q13
【国际标准分类号】:91_100_15
【页数】:52P;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforLaboratoryStandardizationandCalibrationofHand-HeldMoistureMeters
【原文标准名称】:手持式水分仪的实验室标准和校准的标准试验方法
【标准号】:ASTMD4444-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D07.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Calibration;Conductancemeters;Dielectricmeters;Electricalmeasurements;Hand-heldmoisturemeters;Meteringsystem;Moistureanalysis--woodproducts;Samplingwoodproducts
【摘要】:Hand-heldmetersprovidearapidmeansofsamplingMCofwood-basedmaterialsduringandafterprocessingtomaintainqualityassuranceandcompliancewithstandards.ThesemeasurementsareinfluencedbyactualMC,anumberofotherwoodvariables,environmentalconditions,geometryofthemeasuringprobecircuitry,anddesignofthemeter.Themaximumaccuracycanonlybeobtainedbyanawarenessoftheeffectofeachparameteronthemeteroutputandcorrectionofreadingsasspecifiedbythistestmethod.Thistestmethodemployscontrolledconditionsandstraight-grain,clearwoodspecimenstoprovidemeasurementsthatarereproducibleinalaboratory.Thecontrolledconditionspreventmoistureandtemperaturegradientsinthetestspecimen.Inlaboratorycalibration,thereferencedirectmoisturemeasurements(forexample,TestMethodsD4442)shallbemadeonlyintheareaofdirectmeasurementofthemeter.Thisminimizeserrorassociatedwithsamplingofdifferingareasofmeasurementbetweenthistestmethodandthatofthereference(TestMethodsD4442).Mostusesofhand-heldmoisturemetersemploycorrelative(predictive)relationshipsbetweenthemeterreadingandwoodareasorvolumesthatexceedthatofthedirectmetermeasurement(forexample,largerspecimens,piecesoflumber,orlots).Thesecorrelativerelationshipsarebeyondthescopeofthistestmethod.(SeePracticeD7438.)1.1Thistestmethodappliestothemeasurementofmoisturecontent(MC)ofsolidwoodproducts,includingthosecontainingadditives(thatis,chemicalsoradhesives)forlaboratorystandardizationandcalibrationofhand-heldmoisturemeters1.2Thistestmethodmakesnodistinctionbetweenmetermeasurementtechnologiesforstandardizationandcalibrationrequirements.Provisionismadefortestspecimensizetoaccommodatespecificmeters.AppendixX1providesanexplanatorydiscussionandhistorycorrespondingtothemandatorysections.FundamentalmeasurementtechnologiesaredescribedinAppendixX2whenavailable.1.2.1Metersemployingdifferingtechnologiesmaynotprovideequivalentreadingsunderthesameconditions.Whenthistestmethodhasbeenapplied,itisassumedthatthereferencedmeterisacceptableunlessotherwisespecified.MetersshallbecalibratedwithrespecttoMCbydirectmeasurementasdeterminedbyTestMethodsD4442.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:N50
【国际标准分类号】:
【页数】:10P.;A4
【正文语种】:英语