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再生骨料对再生混凝土的强度影响研究.docx

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再生骨料对再生混凝土的强度影响研究 Abstract Recycledconcretehasbecomeincreasinglypopularasasustainableandenvironmentally-friendlyalternativetotraditionalconcrete.Inthisstudy,weinvestigatetheimpactofusingrecycledaggregatesonthecompressivestrengthofrecycledconcrete.Theresultsshowthatwhiletheinitialcompressivestrengthofrecycledconcretemaybelowerthanthatoftraditionalconcretewithvirginaggregates,thelong-termstrengthissimilar,makingrecycledconcreteaviableoptionforconstructionprojects. Introduction Concreteisoneofthemostwidelyusedconstructionmaterialsintheworld.However,theproductionofconcreterequiresalargeamountofnaturalresources,whichcanhavenegativeenvironmentalimpacts.Inrecentyears,theuseofrecycledconcrete,whichincorporatesrecycledaggregatesfrompreviousconcretestructures,hasbecomeanincreasinglypopularmethodforproducingsustainableandenvironmentally-friendlybuildingmaterials.Recycledconcretenotonlyreducesthedemandfornaturalresourcesbutalsoreduceswastebyrepurposingmaterialsthatwouldotherwisebediscarded. Oneofthemainconcernswithrecycledconcreteisitsstrengthcomparedtotraditionalconcrete.Theuseofrecycledaggregatescanleadtoadecreaseinthecompressivestrengthofconcrete.Therefore,thisstudyaimstoinvestigatetheimpactofusingrecycledaggregatesonthecompressivestrengthofrecycledconcrete. Methodology Thestudybeganbycollectingrecycledaggregatesfromalocalrecyclingcenterinthecity.Therecycledaggregateswerethenprocessedintodifferentsizesforuseintheconcretemix.Themixdesignusedwasbasedonastandardconcretemixwithawater-cementratioof0.5. Thestudyusedtwotypesofspecimens:traditionalconcretewithvirginaggregatesandrecycledconcretewithrecycledaggregates.Thespecimenswerecubeswithdimensionsof150mmx150mmx150mm.Thecompressivestrengthofthespecimenswastestedatdifferentcuringtimesof7,14,and28days. Results TheresultsofthecompressivestrengthtestsarepresentedinTable1andFigure1.Thecompressivestrengthoftraditionalconcretewasconsistentlyhigherthanthatofrecycledconcreteatallcuringtimes.However,thedifferenceinstrengthbetweentraditiona