【英文标准名称】:StandardTestMethodforWaterVaporTransmissionofNonFilmFormingTreatmentsUsedonCementitiousPanels
【原文标准名称】:水泥粘合板用无膜成型处理的水蒸气传输的标准试验方法
【标准号】:ASTMD6490-1999(2006)
【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】:D01.47
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:渗透率;永久的;渗入;水蒸气渗入;水蒸气传输
【英文主题词】:permeability;permeance;perms;watervaporpermeance;watervaportransmission
【摘要】:Oneofthefactorsaffectingtheperformanceprovidedbyacementitioustreatmentishowreadilywatervaporpassesthroughit.Hence,thewatervaportransmissioncharacteristicsoftreatmentsareimportantinassessingtheirperformanceinpracticaluse.Thepurposeofthistestmethodistoobtainvaluesofwatervaportransferthroughtreatmentsthatrangeinpermeabilityfromhightolow.Thesevaluesareforuseindesign,manufacture,andmarketing.Watervaportransmissionisnotalinearfunctionoffilmthickness,temperatureorrelativehumidity.Valuesofwatervaportransmissionrate(WVT)andwatervaporpermeance(WVP)canbeusedintherelativeratingoftreatmentsonlyifthetreatmentsaretestedunderthesamecloselycontrolledconditionsoftemperatureandrelativehumidity.1.1Thistestmethodcoversthedeterminationoftherateatwhichwatervaporpassesthroughnonfilmformingtreatments,suchassilanes,siloxanesandblendsofsilanes/siloxanesappliedtocementitioussubstrates.1.2Thistestmethodcoverstheuseofthewetcuptechnique,whichmostcloselyapproachestheexteriorconditionsforuseforthesematerials.Otherconditionscanbeusedifagreeduponbetweenpurchaserandsupplier.Agreementshouldnotbeexpectedbetweenresultsobtainedbydifferentmethodsortestconditions.1.3ThevaluesstatedinSIunitsofmeasurementaredesignatedasthestandard.Factorsforconversiontoinch-poundunitsaregivenin9.2.1.1and9.2.2.1.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Q13
【国际标准分类号】:87_040
【页数】:3P.;A4
【正文语种】: