ASTM D6693-2004(2010) 非增强聚乙烯和非增强柔性聚丙烯土工薄膜张力特性测定的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminingTensilePropertiesofNonreinforcedPolyethyleneandNonreinforcedFlexiblePolypropyleneGeomembranes
【原文标准名称】:非增强聚乙烯和非增强柔性聚丙烯土工薄膜张力特性测定的标准试验方法
【标准号】:ASTMD6693-2004(2010)
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:D35.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:nonreinforced;percentbreakelongation;percentyieldelongation;polyethylene;polypropylene;tensilebreakstrength;tensileyieldstrength;Geomembranes;Nonreinforcedplastics;Polyethylene(PE)geomembraneapplications;Polypropylene(PP)geom
【摘要】:Thistestmethodisdesignedtoproducetensilepropertydataforthecontrolandspecificationofnonreinforcedpolyethyleneandflexiblenonreinforcedpolypropylenegeomembranes.Thesedataarealsousefulforqualitativecharacterizationandforresearchanddevelopment.Itmaybenecessarytomodifythisprocedureforuseintestingcertainmaterialsasrecommendedbythematerialspecifications.Therefore,itisadvisabletorefertothatmaterial''sspecificationbeforeusingthistestmethod.Table1inClassificationD4000liststheASTMmaterialsstandardsthatcurrentlyexist.Tensilepropertiesmayvarywithspecimenpreparation,testspeed,andenvironmentoftesting.Consequently,whereprecisecomparativeresultsaredesired,thesefactorsmustbecarefullymonitoredandcontrolled.Itisrealizedthatamaterialcannotbetestedwithoutalsotestingthemethodofpreparationofthatmaterial.Hence,whencomparativetestsofmaterialsaredesired,thecaremustbeexercisedtoensurethatallsamplesarepreparedinexactlythesameway,unlessthetestistoincludetheeffectsofsamplepreparation.Similarly,forrefereepurposesorcomparisonswithinanygivenseriesofspecimens,caremustbetakentosecurethemaximumdegreeofuniformityindetailsofpreparation,treatment,andhandling.Note28212;Tensilepropertiesmayprovideusefuldataforplasticsengineeringdesignpurposes.However,becauseofthehighdegreeofsensitivityexhibitedbymanyplasticstorateofstrainingandenvironmentalconditions,dataobtainedbythistestmethodcannotbeconsideredvalidforapplicationsinvolvingload-timescalesorenvironmentswidelydifferentfromthoseofthistestmethod.Incasesofsuchdissimilarity,noreliableestimationofthelimitofusefulnesscanbemadeformostplastics.Thissensitivitytorateofstrainingandenvironmentnecessitatestestingoverabroadload-timescaleandrangeofenvironmentalconditionsiftensilepropertiesaretosufficeforengineeringdesignpurposes.1.1Thistestmethodcoversthedeterminationofthetensilepropertiesofnonreinforcedgeomembranesintheformofstandarddumbbell-shapedtestspecimenswhentestedunderdefinedconditionsofpretreatment,temperature,andmachinespeed.1.2Thistestmethodcanbeusedfortestingmaterialsthicknessbetween0.25mm(0.010in.)and6.3mm(0.25in.).Note18212;Thistestmethodisnotintendedtocoverprecisephysicalprocedures.Theconstantrateofcrossheadmovementofthistestlacksaccuracyfromatheoreticalstandpoint.Awidedifferencemayexistbetweentherateofcrossheadmovementandtherateofstrainofthespecimenindicatingthatthetestingspeedsspecifiedmaydisguiseimportanteffectsorcharacteristicsofthesematerialsintheplasticstate.Further,itisrealizedthatvariationsinthethicknessesoftestspecimens,aspermittedbythistestmethod,producevariationsinthesurface-volumeratiosofsuchspecimens,andthatthesevariationsmayinfluencethetestresults.Hence,wheredirectlycomparableresultsaredesired,allsamplesshouldbeofequalthickness.Specialadditionaltestsshouldbeusedwheremoreprecisephysicaldataareneeded.1.3Testdataobtainedbythistestmethodarerelevantandmaybeappropriateforuseinengineeringdesignwithconsiderationoftestconditionsascomparedwithin-serviceconditions.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwit......
【中国标准分类号】:G32
【国际标准分类号】:59_080_70
【页数】:5P.;A4
【正文语种】:英语