高性能混凝土：反应粉体混凝土技术.pptx

ReactivePowderConcrete

PRESENTEDBYAGLAIA

Contents IntroductionCompositionofreactivepowderconcrete(RPC)PropertiesofRPCApplicationofRPCAdvantagesdisadvantagesofRPCCasestudyConclusionReferences

INTRODUCTIONRPCwasfirstdevelopedbyP.RichardandM.Cheyrezy.RPCwasfirstproducedintheearly1990’sbyresearchersatBouygueslaboratoryinFranceandtheworld’sfirstRPCstructure,theSherbrookeBridgeinCanadawasconstructedinJuly1997.

Whatisreactivepowderconcrete(RPC)RPCisanultrahighstrengthandhighductilitycementitiouscompositewithadvancedmechanicalandchemicalproperties.Thereareconcretesthatleadsthewaytotheachievementofthemaximumcompressivestrengthoftheorder120-150Mpa.

……continueInordertoincreasethecompressivestrengthofconcreteevenfurther,theonlywayistoremovethecoarseaggregate.ThisphilosophyhasbeenemployedinwhatistodayknownasReactivePowderConcrete.RPCisnotjustasimplemixtureofcement,waterandaggregates.Quiteoften,itcontainsmineralcomponentsandchemicaladmixtureshavingveryspecificcharacteristics,whichimpartspecificpropertiestotheconcrete.?

COMPOSITIONOFRPC

……continueCEMENTTheirC3Acontent,variesfrom1%upto8%.Theirsolublealkalicontentisverylowandiscomprisedbetween0.16%and0.38%.SILICAFUMESThemainqualityofasilicafumeistheabsenceofaggregates.

…continueSANDSandshouldbeofgoodhardness,readilyavailableandlowcost.Itsparticlesizerangesfrom0.15mmto0.6mm.Thetypeofsandgenerallyusedisnaturalandcrushed.QUARTZPOWDERItsparticlesizerangesfrom0.005mmto0.025mm.Itshouldbecrystallineinnature.

…continueSTEELFIBRESItshouldhavegoodaspectratioandshouldbeabletoimproveductility.It