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再生集料混凝土疲劳性能试验.pdf

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ConstructionandBuildingMaterials38(2013)681–688 ContentslistsavailableatSciVerseScienceDirect ConstructionandBuildingMaterials journalhomepage:www.elsevier.com/locate/conbuildmat Fatiguebehaviorofrecycledaggregateconcreteundercompression andbendingcyclicloadings ⇑ JianzhuangXiaoa,,HongLia,ZhenjunYangb aDepartmentofBuildingEngineering,TongjiUniversity,Shanghai200092,PRChina bSchoolofMechanical,AerospaceandCivilEngineering,theUniversityofManchester,ManchesterM139PL,UK highlights "FatiguebehaviorofRecycledAggregateConcretewasexperimentallystudied. "FatiguestrainvariationandthefatiguemodulusofRACwereanalyzed. "Recycledaggregateshavenoobviouseffectsoncompressivefatiguebehavior. "FatiguelifeofRACislowerthanthatoftheNACundercyclicbendloading. articleinfoabstract Articlehistory:Thefatiguebehaviorofrecycledaggregateconcrete(RAC)with100%recycledcoarseaggregate(RCA) Received2August2012replacementpercentageunderuniaxialcompressionwasexperimentallyinvestigatedinthisstudy. Receivedinrevisedform15September2012Keyquantities,includingtheresidualstrainvariation,fatiguestrainvariationandthefatiguemodulus Accepted18September2012 ofRAC,werecalculatedandanalyzedtocorrelatethestrainresponseandfatiguedamagebehaviorof Availableonline23October2012 RAC.ItisfoundthatthereexistnoobviousdifferencesofcompressivefatiguebehaviorbetweenRAC andnaturalaggregateconcrete(NAC).Basedontheexperimentalresultsandcontinuumdamage Keywords: mechanics,afatiguemodelrelatingthefatiguestrainvariationandthefatiguemodulusdegradation Recycledaggregateconcrete(RAC) tothefatiguedamageevolutionisproposed.Furthermore,RACwith100%RCAreplacementpercentage Naturalaggregateconcrete(NAC) Fatiguebehaviorwasalsotestedundercyclicbendloading.ItisfoundthatthefatiguelifeofRACislowerthanthatofNAC Compressionforthesamestresslevelundercyclicbendloading. BendingÓ2012ElsevierLtd.Allrightsreserved. 1.IntroductionReviews[2–7]showthatmostmechanicalpropertiesanddura- bilitybehaviorofRACaregenerallyinferiortothoseofNAC.There Duetot