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无收缩自密实混凝土的制备及应用研究为题目,写不少于1200的论文 Abstract摘要 Shrinkagehasbeenoneofthekeyconcernsinconcretematerialperformance.Itnotonlyaffectsthedurabilityandservicelifeoftheconcretestructurebutalsoincreasestheriskofcrackinganddeformation.Inthisstudy,thepreparationandapplicationofself-compactingconcrete(SCC)withminimalshrinkagewereinvestigated.TheresultsshowedthatthecombinationofsilicafumeandflyashasamineraladmixturesignificantlyreducedtheshrinkageofSCC,whilemaintainingitsworkabilityandmechanicalproperties.ThedevelopedSCCalsodemonstratedgreatpotentialforapplicationinpracticalengineering,especiallyinlargescaleandcomplexstructures. 关键词:自密实混凝土,收缩,硅灰,飞灰,应用 Introduction引言 Shrinkageisaninevitablephenomenoninconcretematerialperformance,whichnotonlyaffectsthedurabilityandservicelifeoftheconcretestructurebutalsoincreasestheriskofcrackinganddeformation.Manyresearcheshavebeenconductedtoinvestigatethefactorscausingshrinkageanddevelopmeasurestominimizeit.Theuseofmineraladmixtures,especiallysilicafumeandflyash,hasbeenwidelyadoptedtoreduceshrinkageinconcretestructures.Self-compactingconcrete(SCC)isatypeofhigh-performanceconcretethatiscapableoffillingeverycorneroftheformworkwithoutvibration.Duetoitsexcellentworkabilityandmechanicalproperties,ithasbeenincreasinglyusedinpracticalengineering.However,theissueofshrinkageinSCCstillneedstobeaddressedtoimproveitslong-termperformance. ThispaperpresentsastudyonthepreparationandapplicationofSCCwithminimalshrinkage.Thepaperisorganizedasfollows:first,theexperimentalmaterialsandmethodsarepresented,followedbytheresultsanddiscussion.Finally,theconclusionsandrecommendationsforfutureworkaresummarized. ExperimentalMaterialsandMethods实验材料与方法 Materials Thematerialsusedinthisstudyincludedcement,coarseandfineaggregates,mineraladmixtures(silicafumeandflyash),andchemicaladmixtures(superplasticizerandwaterreducer). ThecementusedinthisstudywasPortlandcement(TypeI)withaspecificgravityof3.15g/cm3andafinenessof300m2/kg.Thecoarseaggregateusedwascrushedgranitewithamaximumsizeof20