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MIL-STD-91621, MILITARY STANDARD: PRINCIPLES OF INSPECT, REPAIR ONLY AS NECESSARY (IROAN) PROCEDURES AND PREPARATION OF IROAN PUBLICATIONS (2 NOV 1992)., This military standard addresses the Inspect, Repair Only As Necessary (IROAN) procedure, presents guidelines for establishing an IRON program, and sets the criteria for developing the IROAN standards publication.【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】: