【英文标准名称】:StandardTestMethodforMoistureRetentionCurvesofPorousBuildingMaterialsUsingPressurePlates
【原文标准名称】:用压板测定多孔建筑材料持水曲线的试验方法
【标准号】:ASTMC1699-2009
【标准状态】:现行
【国别】:
【发布日期】:2009
【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】:C16.33
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:moisturecontent;pressureplateapparatus;watervaporsorption;Buildingmaterials/applications;Moisturecontent;Porousbuildingmaterials;Watervaporsorption
【摘要】:Thepurposeofthistestistoobtain,bymeansofaspecifiedlaboratoryprocedure,thevaluesoftheequilibriummoisturecontentathigherRHlevels((x2248;95to100%).Thesevaluesareusedeitherasmeanstocharacterizethematerialorasmaterialcharacteristicsneededasinputtoappropriatecomputermodelsthatcansimulatewettingordryingpotentialofindividualbuildingmaterialsormaterialassembliesunderspecifiedenvironmentalconditions.1.1Thistestmethodspecifiesalaboratoryprocedureforthedeterminationofthewaterretentioncurve(ormoisturestoragecapacity)ofporousbuildingmaterialsatveryhighrelativehumidity(RH)levels(x2248;95to100%RH)correspondingtothecapillarymoistureregionofthesorptionisotherm.Thisisachievedbyusingthepressureplatetestapparatus.Thistechniquewasoriginallydevelopedtostudysoilmoisturecontentandeventuallyhadbeenadaptedtobuildingconstructionmaterials.1.2AthigherRHlevels(x2248;95to100%RH)ofthesorptionisotherm(seeTestMethodC1498),useofclimaticchamberisnotanoption.Thistechniqueusesoverpressuretoextractwateroutoftheporestructureofporousmaterialsuntilequilibriumbetweenthemoisturecontentinthespecimensandthecorrespondingoverpressureisachieved.Usingthepressureplateextractors,equilibriumcanonlybereachedbydesorption.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:91_100_10
【页数】:4P.;A4
【正文语种】: