作者:标准资料网 时间:2024-05-11 00:57:18   浏览:8983   来源:标准资料网

【英文标准名称】:StandardTestMethodforWaterRetentionofRigidThermalInsulationsFollowingPartialImmersion
【原文标准名称】:部分浸入后刚性热绝缘材料水分保持标准试验方法
【标准号】:ASTMC1134-1990(2007)e1
【标准状态】:现行
【国别】:美国
【发布日期】:1990
【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】:immersion;partialimmersion;rigidthermalinsulation;waterretention;Blockandboardthermalinsulation;Immersion;Waterretention
【摘要】:Materialslessthanorequalto0.59in.(15.0mm)inthicknessshallnotbetestedinaccordancewiththistestmethodinordertoavoidcompleteimmersionofthespecimens.Thistypeofexposureisbeyondthescopeofthistestmethod.Materialsshallbetestedatbothactualproductthicknessand1.00in.(25.4mm)thicknessprovidedthematerialscanbecuttoathicknessof1.00in.(25.4mm)withoutchangingtheoriginalcharacterofthematerials.Ifaproductcannotbecutwithoutchangingtheoriginalcharacterofthematerial,thetestreportshallcontainanappropriatenotetothiseffect.Resultsshallbereportedonthebasisofequalnominalwettedspecimensurfacearea(inunitsofkilogramspersquaremetre)formaterialstestedatactualproductthicknessandonthebasisofequalspecimenvolume(inunitsofpercentbyvolume)formaterialstestedat1.00in.(25.4mm)thickness.Ifaproductcannotbecuttoathicknessof1.00in.(25.4mm)oriftheactualproductthicknessislessthan1.00in.(25.4mm)butgreaterthan0.59in.(15.0mm),theproductshallonlybetestedatactualproductthicknessandresultsonlyreportedonthebasisofequalnominalwettedspecimensurfacearea.Byreportingresultsonthebasisofequalnominalwettedspecimensurfacearea,specimensofdifferentthicknessescanbecomparedequitably.Forsomespecimens,thewaterintakeandretentionprimarilymaydependonthenominalwettedsurfaceareaavailableforwaterintake.Byreportingresultsonthebasisofequalspecimenvolume,specimenscanbecomparedequitablyusingunitsthatcommonlyareselectedtorepresentresultsofwaterintaketesting(percentbyvolume).Forsomematerials,waterintakeandretentionprimarilymaydependonthevolumeofthespecimenavailableforwaterintake.Inmostcaseswaterretentionisasecondaryperformancecharacteristicthathasaninfluenceonaprimaryperformancecharacteristic,suchasthermalperformance,surfaceaccumulationofmoisture(thatmaycontributetofungalgrowth),localizedcollectionofelectrolytes(thatmaycontributetocorrosion),etc.Dependingontheprimaryperformancecharacteristicthatisofinterest,thepreferredunitsforuseincomparingthewaterretentionofdifferentmaterialsmaybeeitherkilogramspersquaremetreorpercentbyvolume.Immersiontimesinadditiontothoserequiredbythistestmethodmaybeselectedprovidedthatallpartiesinvolvedareinagreement.Thewaterretentioncharacteristicsofmaterialsmaybeaffectedbyconditionssuchaselevatedtemperaturesorchemicalexposures.1.1Thistestmethoddeterminestheamountofwaterretained(includingsurfacewater)byrigidblockandboardthermalinsulationsusedinbuildingconstructionapplicationsafterthesematerialshavebeenpartiallyimmersedinliquidwaterforprescribedtimeintervalsunderisothermalconditions.Thistestmethodisintendedtobeusedforthecharacterizationofmaterialsinthelaboratory.Itisnotintendedtosimulateanyparticularenvironmentalconditionthatmaybeencounteredinbuildingconstructionapplications.1.2Thistestmethoddoesnotaddressallthepossiblemechanismsofwaterintakeandretentionandrelatedphenomenaforrigidthermalinsulations.Itrelatesonlytothoseconditionsoutlinedin1.1.Determinationofmoistureaccumulationinthermalinsulationsduetocompleteimmersion,watervaportransmission,internalcondensation,freeze-thawcycling,oracombinationoftheseeffectsrequiresdifferenttestprocedures.1.3Eachpartialimmersionintervalisfollowedbyabrieffree-drainageperiod.Thistestmethoddoesnotaddressorattempttoquantifythedrainagecharacteristicsofmaterials.Therefore,resultsformaterialswithdifferentinternalstructureandporosity,suchascellularmaterialsand......
【中国标准分类号】:Q25
【国际标准分类号】:27_220
【页数】:6P.;A4
【正文语种】:英语