【英文标准名称】:StandardTestMethodforObtainingAverageResidual-StrengthofFiber-ReinforcedConcrete
【原文标准名称】:获得纤维加固混凝土的平均残余强度用标准试验方法
【标准号】:ASTMC1399/C1399M-2010
【标准状态】:现行
【国别】:
【发布日期】:2010
【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】:C09.42
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:纤维;加固混凝土;残余强度;弯曲试验;后抗裂强度;梁弯曲度;纤维加固混凝土;弯曲试验-混凝土
【英文主题词】:fiber&x2013;reinforcedconcrete;residualstrength;flexuretesting;postcrackingstrength;Beamdeflection;Fiber-reinforcedconcrete;Flexuraltesting--concrete;Postcrackingstrength;Residualstrength
【摘要】:Thistestmethodprovidesaquantitativemeasureusefulintheevaluationoftheperformanceoffiberx2013;reinforcedconcrete.Itallowsforcomparativeanalysisamongbeamscontainingdifferentfibertypes,includingmaterials,dimensionandshape,anddifferentfibercontents.Resultscanbeusedtooptimizetheproportionsoffiberx2013;reinforcedconcretemixtures,todeterminecompliancewithconstructionspecifications,toevaluatefiberx2013;reinforcedconcretewhichhasbeeninservice,andasatoolforresearchanddevelopmentoffiberx2013;reinforcedconcrete(SeeNote2).Note28212;BanthiaandDubeycomparedresultsusingthistestmethodwithresidualstrengthsatthesamenetdeflectionsusingatestprotocolthatissimilartothatdescribedinTestMethodC1609/C1609Mon45beamswithasinglefiberconfigurationatproportionsof0.1,0.3,and0.5%byvolume.Theresultsbythistestmethodwereonaverage6.4%lowerthanbytheprocedureofTestMethodC1609/C1609M.Testresultsareintendedtoreflecteitherconsistencyordifferencesamongvariablesusedinproportioningthefiberx2013;reinforcedconcretetobetested,includingfibertype(material),fibersizeandshape,fiberamount,beampreparation(sawedormolded),andbeamconditioning.Inmoldedbeamsfiberorientationnearmoldedsurfaceswillbeaffectedbytheprocessofmolding.Fortestsoffiber-reinforcedconcretecontainingrelativelyrigidorstifffibersoflengthgreaterthan35mm[1.4in.],theuseofsawedbeamscutfromsampleswithaninitialwidthanddepthofatleast3timesthelengthofthefiberisrequiredtominimizeeffectsoffiberorientation.Whensawedbeamsareemployed,andtoavoidtheeffectsoffiberorientation,careshallbeappliedtoensurethattheflexuraltensilesurfaceofthebeamisasawedsurface.1.1Thistestmethodcoversthedeterminationofresidualstrengthofafiberx2013;reinforcedconcretetestbeam.Theaverageresidualstrengthiscomputedusingspecifiedbeamdeflectionsthatareobtainedfromabeamthathasbeencrackedinastandardmanner.Thetestprovidesdataneededtoobtainthatportionoftheloadx2013;deflectioncurvebeyondwhichasignificantamountofcrackingdamagehasoccurredanditprovidesameasureofpostx2013;crackingstrength,assuchstrengthisaffectedbytheuseoffiberx2013;reinforcement.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.
【中国标准分类号】:Q14
【国际标准分类号】:91_100_30
【页数】:6P.;A4
【正文语种】: