【英文标准名称】:StandardTestMethodforAsbestosContentofAsbestosTextiles
【原文标准名称】:石棉织物石棉含量的标准试验方法
【标准号】:ASTMD1918/D1918M-1995(2009)e1
【标准状态】:现行
【国别】:美国
【发布日期】:1995
【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】:C17.03
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:asbestos;asbestostextile;content;ignitionloss;test;textile
【摘要】:Theasbestoscontentofasbestostextilematerialsisofmajorsignificance,sincethepercentageofasbestospresentdefinesthegradeofthetextileandtheapproximateserviceabilitytemperatureforsuchmaterials.Thistestmethodisconsideredsatisfactoryforacceptancetestingofcommercialshipmentsbecause:(1)currentestimatesofbetween-laboratoryreproducibilityareacceptable,(2)thetestmethodhasbeenusedextensivelyinthetradeforacceptancetesting.Incasesofdispute,thestatisticalbias,ifany,betweenthelaboratoryofthepurchaserandthelaboratoryofthesellershouldbedeterminedwitheachcomparisonbeingbasedontestingrandomizedspecimensfromonesampleofmaterial.Thefactorof0.86isbaseduponameasuredaverageof14%forthelossofwaterofcrystallizationonheatingchrysotileasbestostoatemperatureofatleast800x00B0;C[1470x00B0;F].Thecalculatedasbestoscontentmaybeinerroriftheactualmasslossdiffersfromthe14%average.Ifthespecimenincludescalciumcarbonate(CaCO3),thiscompoundisdecomposedat800x00B0;C[1470x00B0;F]andhighertemperatures.Noothercarbonatesarepresentinappreciableamounts.Ifthetextilespecimenincludescarbonates,thelossofmassobservedduringignitionwillincludethewaterofcrystallizationoftheasbestosandcarbondioxidefromthecarbonates.Ifthespecimenincludesbothcarbonatesandorganicfiberthelossofmasswillincludewaterofcrystallizationoftheasbestos,carbondioxidefromthecarbonates,andthecombustiblepartoftheorganicfibers.Failuretotakeproperaccountoftheselosseswillresultinlowergradingofthematerial.AsbestostextilesasusedinnormalapplicationsarenotsubjectedtoatemperaturewhereCaCO3willdecompose.AnyCaCO3containedwillremainunchangedandassuchoffersexcellentthermalinsulation.Itisthereforeincludedinthecalculationaspartoftheasbestoscontent.Themassoftheoriginalcarbonateandtheresidualoxideformedonignitionofthecarbonateinanyspecimencanbecalculatedfromtheamountofcarbondioxideevolvedfromaknownmassofthespecimen.Thecalculatedvaluesareusedinthedeterminationoftheasbestoscontentofspecimenswhichincludecarbonate.1.1Thistestmethodcoversthedeterminationoftheasbestoscontentofuntreatedchrysotileasbestostextilematerialswhichareusuallyblendsofasbestosandorganicfibers.Thistestmethodisalsoapplicabletotreatedasbestostextilematerialsprovidedthetreatmentcanbecompletelyremovedpriortotesting.1.2Thistestmethodislimitedtothoseasbestostextilematerialsinwhichasbestosistheonlyinorganicfiberpresent,orinwhichanyotherinorganicfiberorwireusedasreinforcementcanberemovedpriortotesting.1.3Ifcarbonatesarepresent,acorrectionismadeforthelossonignitioninthecalculationforasbestoscontent.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Warningx2014;Breathingofasbestosdustishazardous.Asbestosandasbestosproductspresentdemonstratedhealthrisksforusersandforthosewithwhomtheycomeintocontact.Inadditiontootherprecautions,whenworkingwithasbestos-cementproducts,minimi......
【中国标准分类号】:Q62
【国际标准分类号】:59_060_30
【页数】:5P.;A4
【正文语种】:英语