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【英文标准名称】:StandardTestMethodforHeatandVisibleSmokeReleaseRatesforMaterialsandProductsUsingaThermopileMethod
【原文标准名称】:热电堆法测定材料和产品热量和可见烟发散度的标准试验方法
【标准号】:ASTME906/E906M-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:E05.21
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:量热法;着火性;热散发;烟熏模糊;烟释放;燃烧特性-建筑材料;燃烧;防火材料/测试;加热试验-建筑产品;点火-建筑材料;辐射热补;辐射暴露;释放率;屋面材料/应用;烟分析;
【英文主题词】:calorimetry;ignitability;heatrelease;smokeobscuration;smokerelease;Burningcharacteristics--buildingmaterials;Combustion;Fire-resistantmaterials/testing;Heatingtests--buildingproducts;Heatrelease;Ignition--buildingmaterials;Radiant
【摘要】:Thistestmethodprovidesadescriptionofthebehaviorofmaterialspecimensunderaspecifiedfireexposureintermsofthereleaserateofheatandvisiblesmoke.Itispossibletodeterminethechangeinbehaviorofmaterialsandproductswithchangeinheat-fluxexposurebytestingspecimensinaseriesofexposuresthatcoverarangeofheatfluxes.Thedataobtainedforaspecifictestdescribetherateofheatandsmokereleaseofthespecimenwhenexposedtothespecificenvironmentalconditionsandproceduresusedinperformingthattest.Theentireexposedsurfaceofthespecimenwillnotbeburningduringtheprogressiveinvolvementphasewhenpiloted,pointignition(impingement)proceduresareused.Duringtheperiodofprogressivesurfaceinvolvement,releaseratesofheatandsmokearex201C;persquaremetreoforiginalexposedsurfaceareax201D;notx201C;persquaremetreofflameinvolvedsurface.x201D;Theratesofbothheatandsmokereleasearecalculatedpersquaremetreoforiginalsurfaceareaexposed.Ifaspecimenswells,sags,delaminates,orotherwisedeformssothattheexposedsurfaceareachanges,calculatedreleaseratescorrespondtotheoriginalarea,nottothenewsurfacearea.Heat-releasevaluesdependonmodeofignition.Gasphaseignitiongivesamoredimensionallyconsistentmeasureofreleaseratewhenveryrapidorimmediateflameinvolvementofthespecimensurfaceoccurs.However,piloted,pointignitionallowsrelease-rateinformationtobeobtainedatexternalheatfluxfromzerouptothatrequiredforsatisfactorygas-phaseignition,usuallyover20kW/m2externalexposure.Nocorrelationbetweenthetwomodesofpilotedignitionhasbeenestablished.Releaseratesdependonmanyfactors,someofwhichcannotbecontrolled.Itispossiblethatsamplesthatproduceasurfacechar,alayerofadherentash,orthosethatarecompositesorlaminatesdonotattainasteady-statereleaserate.Thermallythinspecimens,thatis,specimenswhoseunexposedsurfacechangestemperatureduringperiodoftest,willnotattainasteady-statereleaserate.Therefore,releaseratesforagivenmaterialwilldepend,forexample,onhowthematerialisused,itsthickness,andthemethodofmounting.Heat-releasevaluesareforthespecificspecimensize(exposedarea)tested.Resultsarenotdirectlyscalabletodifferentexposedsurfaceareasforsomeproducts.Themethodislimitedtospecimensizesofmaterialsinaccordancewith7.1andtoproductsfromwhichitispossibletoobtainatestspecimenrepresentativeoftheproductinactualuse.Thetestislimitedtoexposureofonesurface;therearetwooptionsforexposureorientation:eitherverticalorhorizontal.Ifaheatreleaserateof8kW,whichisequivalentto355kW/m2for150-mm[6-in.]by150-mm[6in.]verticalspecimens,or533kW/m2for100-mm[4-in.]by150-mm[6-in.]horizontalspecimensisexceeded,thereisdangerofcombustionoccurringabovethestack.Nogeneralrelationshipbetweenreleaseratevaluesobtainedfromhorizontallyandverticallyorientedspecimenshasbeenestablished.Conducttestsonspecimensintheforminwhichthematerialisorientedinenduseconditions.Toprovideadditionalinformation,conducttestsinthehorizontalorientationforthosespecimensthatmeltanddripintheverticalorientation.Releaseratemeasurementsprovideusefulinformationforproductdevelopmentbygivingaquantitativemeasureofspecificchangesinfiretestperformancecausedbyproductmodifications.ThistestmethoddiffersinboththemethodofexposureandthecalculationprocedurefromthetechniquesusedinTestMethod