ASTM C876-2009 混凝土中非涂覆增强钢半电池电势用标准试验方法

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【英文标准名称】:StandardTestMethodforHalf-CellPotentialsofUncoatedReinforcingSteelinConcrete
【原文标准名称】:混凝土中非涂覆增强钢半电池电势用标准试验方法
【标准号】:ASTMC876-2009
【标准状态】:作废
【国别】:
【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】:G01.14
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:耐腐蚀混凝土性能;耐腐蚀混凝土增强钢;腐蚀;腐蚀性;腐蚀电势;混凝土增强;混凝土试件;腐蚀性混凝土;电场测试-混凝土/堆积物;半电池电势;增强钢/混凝土;非涂覆钢;NumberCode77.140.15(Steelsforreinforcementofconcrete)
【英文主题词】:concrete-corrosionactivity;concrete-corrosionofreinforcingsteel;corrosion;corrosionactivity;corrosionpotentials;Concretereinforcement;Concretetestspecimens;Corrosion--concrete;Fieldtesting--concrete/aggregates;Half-cellpotentials;Rein
【摘要】:Thistestmethodissuitableforin-serviceevaluationandforuseinresearchanddevelopmentwork.Thistestmethodisapplicabletomembersregardlessoftheirsizeorthedepthofconcretecoveroverthereinforcingsteel.Concretecoverinexcessof3in.(75mm)canresultinanaveragingofadjacentreinforcementcorrosionpotentialsthatcanresultinalossoftheabilitytodiscriminatevariationinrelativecorrosionactivity.Thistestmethodmaybeusedatanytimeduringthelifeofaconcretemember.Theresultsobtainedbytheuseofthistestmethodshallnotbeconsideredasameansforestimatingthestructuralpropertiesofthesteelorofthereinforcedconcretemember.Thepotentialmeasurementsshouldbeinterpretedbyengineersortechnicalspecialistsexperiencedinthefieldsofconcretematerialsandcorrosiontesting.Itisoftennecessarytouseotherdatasuchaschloridecontents,depthofcarbonation,delaminationsurveyfindings,rateofcorrosionresults,andenvironmentalexposureconditions,inadditiontocorrosionpotentialmeasurements,toformulateconclusionsconcerningcorrosionactivityofembeddedsteelanditsprobableeffectontheservicelifeofastructure.1.1Thistestmethodcoverstheestimationoftheelectricalcorrosionpotentialofuncoatedreinforcingsteelinfieldandlaboratoryconcrete,forthepurposeofdeterminingthecorrosionactivityofthereinforcingsteel.1.2Thistestmethodislimitedbyelectricalcircuitry.Concretesurfaceinbuildinginteriorsanddesertenvironmentslosesufficientmoisturesothattheconcreteresistivitybecomessohighthatspecialtestingtechniquesnotcoveredinthistestmethodmayberequired(see5.1.4.1).Concretesurfacesthatarecoatedortreatedwithsealersmaynotprovideanacceptableelectricalcircuit.ThebasicconfigurationoftheelectricalcircuitisshowninFig.1.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.FIG.1ReferenceElectrodeCircuitry
【中国标准分类号】:H49
【国际标准分类号】:77_140_15
【页数】:7P.;A4
【正文语种】: