【英文标准名称】:StandardPracticeforTime-to-Failure(Creep-Rupture)ofAdhesiveJointsFabricatedfromEPDMRoofMembraneMaterial
【原文标准名称】:由EPDM屋顶膜材料制造的胶粘剂接头的失效时间(蠕变破裂)的标准操作规程
【标准号】:ASTMD6383-1999(2005)
【标准状态】:现行
【国别】:
【发布日期】:1999
【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】:D08.18
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:蠕变;实施规程;屋顶层;胶粘剂试验;实验室暴露;失效时间;乙烯-丙烯-二烯三元共聚物;缝隙;连接;试验条件
【英文主题词】:adhesivetestings;creep;EPDM;joints;laboratoryexposure;practice;roofing;seams;testconditions;time-to-failure
【摘要】:AnimportantfactoraffectingtheperformanceofseamsofEPDMmembranesistheirabilitytoremainbondedoverthemembranersquo;expectedservicelife.Time-to-failuretestsprovideameansofcharacterizingthebehaviorofjointsunderconstantloadovertime.Note18212;Table1isbasedontheresultsofanindustrygovernmentconsortiumstudyoncreep-ruptureresistance(time-to-failure)ofEPDMadhesivejoints.4,5ReferraltoFootnotes5and6providestypicaltime-to-failuredata,developedundertheconditionsinTable1,forEPDMjointsfabricatedinthelaboratorywithnonreinforcedEPDMroofmembranematerial,butyl-basedtapes,andliquidadhesives.Itisnotedthatthepeelloadspecifiedinthispracticeis9.8N(2.2lbf).ThepeelloadunderwhichthetestsdescribedinFootnotes4and5wereconductedwas9.3N(2.1lbf).Aloadof9.8N(2.2lbf)correspondsto1kgf(2.2lbf),anddeadweightsof1-kg(2.2-lbm)massareavailablethroughlaboratoryequipmentsupplyhouses.Similarly,aloadof29.4N(6.6lbf)correspondstoadeadweightof3-kg(6.6-lbm)mass.Time-to-failuretestscomplementothermechanicaltestssuchasstrengthforcharacterizingjointsofEPDMroofmembranes,andcanbeincorporatedinspecificationsforadhesivesforjoiningEPDMroofmembranematerial.Thispractice,whichisspecifictoEPDMjoints,complementsTestMethodD5405thatprovidesgeneralrequirementsforthepreparationandcreep-rupturetestingofjointsfabricatedfromanynonbituminousorganicroofmembranematerial.Laboratoryexperienceinconductingtime-to-failuretestsofjointsEPDMroofmembraneshasshownthatspecimensarelesscreep-resistantunderpeelloadingthanundershearloading.Consequently,themajorityofthetestsstipulatedinthispracticeareperformedunderpeelloading.Thispracticedoesnotdeveloptime-to-failuredataonallenvironmentalconditionstowhichEPDMadhesiveseamscanbesubjectedinservice.1.1Thispracticecoverssamplepreparationtemperatures,testparameters,andspecimenexposureconditionsthatareapplicablewhenTestMethodD5405isusedforconductingtime-to-failure(creep-rupture)testsofadhesivejointsfabricatedfromethylene-propylene-dieneterpolymer(EPDM)roofmembranematerial.1.2ThispracticeisapplicabletojointsfabricatedinthelaboratoryfromEPDMroofmembranematerialsandadhesivesreceivedfromsuppliers,andtojointspreparedfromEPDMseamssampledfromfieldinstallations.1.3Thejointsarebondedusingpreformedtapeorliquid-basedadhesives,andEPDMroofmembranematerialsthatarenon-reinforced,fabric-orscrim-reinforced,andfabricbacked.Primersarealsousedasrecommendedforthespecificadhesive.1.4Thispracticecontainsnotesthatareexplanatoryandarenotpartofthemandatoryrequirementsofthispractice.1.5ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityoftheregulatorylimitationspriortouse.
【中国标准分类号】:G38
【国际标准分类号】:91_060_20
【页数】:3P.;A4
【正文语种】: