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【英文标准名称】:StandardTestMethodforStrengthofSewnorThermallyBondedSeamsofGeotextiles
【原文标准名称】:土工织物缝合或热粘结缝隙强度的标准试验方法
【标准号】:ASTMD4884-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:D35.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:geotextile;seamweld;sewnseam;thermallybondedseam;Breakingstrength/tenacity;Failureendpoint--soil/relatedmaterials;Fieldtesting--geosynthetics;Geosynthetics;Seams;Sewnseams;Strength--geosynthetics;Tensileproperties/testing--geosynt
【摘要】:AsexplainedinTestMethodD4595,narrowgeotextilespecimensdemonstratethetendencytocontract(neckdown)inthegageareawhenunderstress.Thewiderwidthspecimenwillminimizethisphenomenoninseamsduringstrengthtesting.Theresultsachievedinthistestmethodcanmoreaccuratelycorrelatetotheseamstrengthvaluesanticipatedinthefield.Thistestmethodcanbeusedtomeasuretheseamstrengthofgeotextiles,andmayalsobeusedforacceptancetestingofcommercialshipmentsofgeotextiles.Whenstrengthisnotnecessarilyadesignconsiderationofseaminteraction,analternatemethodfordeterminingtheseamstrength,suchasTestMethodD1683,maybeuseddependingonthespecificationrequirements.Becausecurrentinformationaboutlaboratoryprecisionisincomplete,comparativetests,asdescribedin5.2.1,maybeadvisable.Incaseofadisputearisingfromdifferencesinreportedtestresultswhenusingthistestmethodforacceptancetestingofcommercialshipments,thepurchaserandthesuppliershouldperformcomparativeteststodetermineifthereisastatisticalbiasbetweentheirlaboratories.Competentstatisticalassistanceisrecommendedfortheinvestigationofbias.Asaminimum,thetwopartiesshouldtakeagroupoftestspecimensfromthesamelotofgeotextile,thatutilizealikemethodofseamassemblytoachieveseaminteraction.Thespecimensshouldthenberandomlyassignedinequalnumbertoeachlaboratoryfortesting.Ifabiasisfound,eitheritscausemustbedeterminedandcorrected,orthepurchaserandthesuppliermustagreetointerpretfuturetestresultsinlightoftheknownbias.Althoughothermethodsofdeterminingseamstrengthareavailable,thistestmethod,thatmeasureswidespecimens,willmoreaccuratelycorrelatetotheanticipatedperformanceinthefield.Thistestmethodcanbeusedtohelpdetermineseamdesignengineeringforthegeotextilesbeingevaluated.1.1Thistestmethodcoverstheseamstrengthofgeotextiles.Theprimarydistinctionofthistestmethodforevaluatingseamstrengthisthewidthofthespecimen.ThisisincontrasttothemorenarrowspecimenwidthusedinthetensilegrabstrengthtestdiscussedinTestMethodD1683.1.2Thistestmethodwillprovidedatatoindicatetheseamstrengththatcanbeachievedforeachparticulargeotextileandseamassemblyconstruction.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Theinch-poundunitsgiveninparenthesesareprovidedforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:W59
【国际标准分类号】:59_080_70
【页数】:6P.;A4
【正文语种】:英语