【英文标准名称】:StandardTestMethodforEffectsofTemperatureonStabilityofGeotextiles
【原文标准名称】:土工布温度稳定性标准试验方法
【标准号】:ASTMD4594-1996(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:D35.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:degradation;expansion;geotextile;stability;temperatureeffects;Elongation--geotextiles;Gases;Geosynthetics;Loadingtests--geosynthetics;Nitrogen;Polymericgeomembranes;Stability;Temperaturetests--soil/rock/relatedmaterials;Tensileprope
【摘要】:Thistestmethodisusedforevaluatingtherelativeeffectsoftemperatureongeotextilesmanufacturedfromdifferentpolymers,byadifferentmanufacturingprocess,orboth.Duringshippingandstorage,thegeotextilemaybeexposedtoabnormaltemperatures.Thefabriccouldbetestedatthesetemperaturestodeterminethedetrimentaleffectsoftheseconditionsonthestrengthproperties.Thistestmethodmayalsobeusedtoevaluatethecycliceffectsoftemperature(freeze-thaw),thatis,samplescanbeconditionedtobelownormaltemperatures(belowfreezing)andthentoabovenormaltemperatures(elevatedtemperatures)foragivennumberofcycles.Strengthcharacteristicscanbedeterminedafterthesecyclicexposures.Mostnonwoven,woven,andcompositefabriccanbetestedbythismethod.Modificationofthetechniquesislikelytobenecessaryforanyfabrichavingastrengthinexcessof179kg/cm(1000lb/in.)width.Thistestmethodisnotrecommendedforknittedfabrics.Thistestmethodisanindextestmethodandisnotrecommendedforacceptancetestingofcommercialshipments,sinceinformationonbetweenlaboratoryprecisionhasnotbeenestablished.Insomecasesthepurchaserandsellermayhavetotestacommercialshipmentofoneormoregeotextilesbythebestavailablemethod,eventhoughthemethodhasnotbeenrecommendedforacceptancetestingofcommercialshipments.Acomparativetestperformedasdirectedin5.5.1maybeadvisable.IncaseofadisputearisingfromdifferencesinreportedtestresultswhenusingTestMethodD4594foracceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldconductcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensthatareashomogenousaspossibleandthatarefromalotofmaterialofthetypeinquestion.Thetestspecimensshouldthenberandomlyassignedinequalnumberstoeachlaboratoryfortesting.TheaverageresultsfromthetwolaboratoriesshouldbecomparedusingStudent''st-testforunpaireddataandanacceptableprobabilitylevelchosenbythetwopartiesbeforethetestingisbegun.Ifabiasisfound,eitheritscausemustbefoundandcorrectedorthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinthelightoftheknownbias.1.1Thistestmethodprovidesaprocedurefordeterminingtheeffectsofclimatictemperatureonthetensilestrengthandelongationpropertiesofgeotextiles.1.2TheeffectoftemperatureonthestabilityofgeotextilesisreportedasthechangeintensilestrengthandelongationbetweentestsperformedasdirectedinTestMethodD5035,inthestandardatmospherefortestingtextiles,andtestsperformedunderconditionsatwhichthegeotextileisexpectedtoperforminthefield.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesstatedininch-poundunitsareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.See7.1.1-7.1.3.
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:3P.;A4
【正文语种】:英语