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圆钢管地聚物再生砖骨料混凝土短柱轴压性能研究.docx

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圆钢管地聚物再生砖骨料混凝土短柱轴压性能研究 Abstract Inordertoexplorethepossibilityofusingrecycledmaterialsinconcretestructures,thisstudyfocusedonthecompressiveperformanceofshortcolumnmadeofrecycledaggregateconcretewithpolymer-modifiedrecycledbrickpowderandcircularsteelpipesascomponents.Thecompressiveperformanceoftheshortcolumnswithdifferentmixingratiosofrecycledaggregateandpolymer-modifiedrecycledbrickpowderwastested.Theexperimentalresultsshowthatthecompressivestrengthoftheshortcolumnincreasedsignificantlywiththeincreaseinthepercentageofpolymer-modifiedrecycledbrickpowder.Itindicatesthattheadditionofpolymer-modifiedrecycledbrickpowdercaneffectivelyimprovethemechanicalpropertiesofrecycledaggregateconcrete. Introduction Thegrowingdemandforconstructionmaterialsandtheincreaseinconstructionwastehaveledtoaneedforsustainablebuildingsolutions.Inrecentyears,theuseofrecycledmaterialsinconstructionprojectshasbecomeanimportantresearchanddevelopmentarea.Oneoftheserecycledmaterialsisrecycledaggregates,whichareobtainedfromconstructionanddemolitionwaste.However,thequalityofrecycledaggregatesisgenerallypoor,whichlimitstheiruseinconcretestructures.Toaddressthisissue,manystudieshavebeenconductedtoenhancethequalityofrecycledaggregates. Anotherrecycledmaterialisrecycledbrickpowder,whichisproducedbypulverizingthewastebricksfromdemolishedbuildings.Inrecentyears,theuseofrecycledbrickpowderasafineaggregateinconcretehasgainedattention. Inthisstudy,circularsteelpipeswereusedastheoutercasingoftheshortcolumns,andpolymer-modifiedrecycledbrickpowderwasusedasasubstitutefornaturalfineaggregateintheconcretemix.Theaimofthisstudywastoinvestigatethecompressiveperformanceoftheshortcolumnsmadeofrecycledaggregateconcretewithpolymer-modifiedrecycledbrickpowderandcircularsteelpipes. ExperimentalProgram Materials Thematerialsusedinthisstudyinclude: -Recycledaggregates(RA) -Naturalfineaggregates(NFA) -Polymer-modifiedrecycledbrickpowder(PMRBP) -Cement -Water -Steelpipes Table1showsthepropertiesofthematerialsusedinthisstudy. Tabl