【英文标准名称】:StandardTestMethodforHeatandMoistureResistanceofWood-AdhesiveJoints
【原文标准名称】:木材粘结接头耐热和耐水性的标准试验方法
【标准号】:ASTMD4502-1992(2004)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:D14.70
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:胶粘剂;试验;木材;抗湿;胶粘连接
【英文主题词】:heatresistance;moistureresistance;shearstrength
【摘要】:Thistestmethodcanserveasausefultoolfordurabilityassessmentandservicelifeforecasting.5.1.1Thistestmethodcanbeusedtomeasuretheeffectsofheatandmoistureandtheeffectoftheirinteractiononadhesivesandbondedjoints.Knowledgeoftheseeffectsisusefultoanadhesiveformulatorormanufacturer.Moistheatagingisparticularlyusefulfordeterminingtheeffectsofacidicadhesivesystemsonthehydrolysisofwoodadherends.5.1.2Thistestmethodprovidesameansofcomparingtherateofdegradationofanunknownadhesive-adherendcombinationtotherateofdegradationofaknowncombinationinthermalorhydrolyticagingenvironments.Suchacomparisoncanbeusefultoadhesivemanufacturersforintroducinganewproducttothemarketandforhelpingdesignersselectingadhesives.5.1.3Thistestmethoddoesnotduplicateanynaturalserviceenvironment,butitdoesprovideameansofestimatingtheservicelifeofjointsinsimilarenvironments.Service-lifeestimatesareusefultodesignersofbondedstructuresorstructuresusingbondedproducts.Service-lifeestimatesrelyontheassumptionthatthechemicaldegradationmechanismisthesameattheelevatedagingtemperaturesasattheservicetemperature.However,thismaynotbetrueineverycase.Thispossibility,togetherwiththevariabilityinspecimenpreparation,intheagingexposures,andinthestrengthmeasurements,requirethatcautionbeusedinacceptingtheestimateofservicelife.1.1Thepurposeofthistestmethodistoestimatetheresistanceofadhesive-bondedjointstothermalandhydrolyticdegradation.1.2Thistestmethodisprimarilyforwood-to-woodjointsbutmaybeappliedtojointsofwoodtoothermaterials.1.3Theeffectsofchemicalssuchasfireretardants,preservatives,andextractivesinthewooduponjointdegradationresistancecanbeestimated.1.4Thistestmethoddoesnotaccountfortheeffectsofstress,theotherprincipaldegradingfactor,nordoesitaccountforcyclicorvariabletemperatureormoisturelevels.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y80
【国际标准分类号】:
【页数】:15P.;A4
【正文语种】: