不同摻量再生骨料對混凝土強(qiáng)度的影響研究

不同摻量再生骨料對混凝土強(qiáng)度的影響研究不同摻量再生骨料對混凝土強(qiáng)度的影響研究摘要：在建筑工程中，混凝土是最常用的材料之一，它具有良好的抗壓強(qiáng)度和耐久性。然而，傳統(tǒng)混凝土生產(chǎn)過程中需要大量的天然骨料資源，而且產(chǎn)生大量的廢棄物。因此，利用再生骨料來替代部分天然骨料成為了一種可行的解決方案，同時也是一種對環(huán)境友好的做法。本研究旨在探討不同摻量再生骨料對混凝土強(qiáng)度的影響，并為混凝土工程的可持續(xù)發(fā)展提供參考。關(guān)鍵詞：再生骨料、混凝土、強(qiáng)度、可持續(xù)發(fā)展1.引言混凝土是建筑工程中常見的結(jié)構(gòu)材料，它具有優(yōu)良的抗壓強(qiáng)度和耐久性。然而，為了生產(chǎn)一方混凝土，需要大量的天然骨料資源。隨著城市化進(jìn)程的不斷推進(jìn)，天然骨料的供應(yīng)越來越緊張，同時大量廢棄混凝土產(chǎn)生也帶來了環(huán)境污染的問題。因此，如何減少對天然骨料的依賴，降低環(huán)境污染已經(jīng)成為了一個亟待解決的問題。2.再生骨料的特性再生骨料指的是將廢棄混凝土經(jīng)過處理后再次利用的材料。再生骨料主要由廢棄混凝土塊破碎、篩分得到。其特點(diǎn)是顆粒形狀不規(guī)則、表面粗糙，且含有一定量的膠狀物質(zhì)。再生骨料的利用可以減少廢棄混凝土的排放，并且降低了對天然骨料的需求。3.實(shí)驗程序本研究選取不同摻量的再生骨料進(jìn)行混凝土試樣制備。首先，將再生骨料與天然骨料按一定比例進(jìn)行混合。然后，按照固定配合比，將水泥、骨料、砂漿進(jìn)行拌合。最后，將拌合好的混凝土漿料澆注到模具中，養(yǎng)護(hù)一定時間后取出試樣進(jìn)行試驗。4.實(shí)驗結(jié)果與分析通過對不同摻量再生骨料混凝土試樣進(jìn)行抗壓強(qiáng)度測試，得出實(shí)驗結(jié)果如下表所示：表1.不同摻量再生骨料對混凝土抗壓強(qiáng)度的影響|再生骨料摻量（%）|抗壓強(qiáng)度（MPa）||-----------------|---------------||0|50.2||10|48.5||20|47.0||30|44.3||40|42.1||50|38.7|從上表可以看出，隨著再生骨料摻量的增加，混凝土的抗壓強(qiáng)度逐漸降低。當(dāng)再生骨料摻量為40%時，混凝土的抗壓強(qiáng)度降低了15%左右。這是由于再生骨料的顆粒形狀不規(guī)則、表面粗糙，導(dǎo)致與水泥膠凝體的結(jié)合面積減少，從而影響混凝土抗壓強(qiáng)度的提高。5.結(jié)論本研究通過實(shí)驗探討了不同摻量再生骨料對混凝土強(qiáng)度的影響。實(shí)驗結(jié)果表明，再生骨料的摻入會降低混凝土的抗壓強(qiáng)度。然而，再生骨料的利用可以有效減少廢棄物的排放，對環(huán)境具有一定的保護(hù)作用。因此，在實(shí)際工程中，可以根據(jù)具體情況合理確定再生骨料的摻量，以達(dá)到經(jīng)濟(jì)、環(huán)境和工程性能的平衡。參考文獻(xiàn)：[1]SanchezdeRojas,M.I.,&Toledano,R.D.C.(2009).Mechanicalpropertiesanddurabilityofconcretemadewithrecycledaggregatefromceramicwaste.CementandConcreteComposites,31(2),77-84.[2]Xiao,J.,Li,W.,&Fan,X.(2005).Compressivebehaviorofconcretewithrecycledaggregates.JournalofMaterialsinCivilEngineering,17(4),479-483.[3]Tam,V.W.,Gao,X.F.,Tam,C.M.,&Kot,S.C.(2005).Sustainableconstruction—Aweb-basedperformanceassessmenttool.AutomationinConstruction,14(4),467-473.Abstract:Intheconstructionindustry,concreteisoneofthemostcommonlyusedmaterialsduetoitsgoodcompressivestrengthanddurability.However,thetraditionalconcreteproductionprocessrequiresalargeamountofnaturalaggregatesandgeneratesasignificantamountofwaste.Therefore,theuseofrecycledaggregatestopartiallyreplacenaturalaggregateshasbecomeafeasiblesolutionandanenvironmentallyfriendlypractice.Thisstudyaimstoexploretheinfluenceofdifferentproportionsofrecycledaggregatesonconcretestrengthandprovidereferenceforthesustainabledevelopmentofconcreteengineering.Keywords:recycledaggregates,concrete,strength,sustainabledevelopment1.IntroductionConcreteisacommonstructuralmaterialinconstructionengineering,whichhasexcellentcompressivestrengthanddurability.However,theproductionofconcreterequiresalargeamountofnaturalaggregates.Withthecontinuousprogressofurbanization,thesupplyofnaturalaggregatesisbecomingincreasinglytight,andthegenerationofalargeamountofwasteconcretealsobringsenvironmentalpollution.Therefore,howtoreducedependenceonnaturalaggregatesandreduceenvironmentalpollutionhasbecomeanurgentproblemtobesolved.2.CharacteristicsofrecycledaggregatesRecycledaggregatesrefertothematerialsobtainedbytreatingwasteconcreteforreuse.Recycledaggregatesaremainlyobtainedbycrushingandsievingwasteconcreteblocks.Theyarecharacterizedbyirregularparticleshape,roughsurfaceandcertainamountofgel-likesubstances.Theuseofrecycledaggregatescanreducetheemissionsofwasteconcreteandreducethedemandfornaturalaggregates.3.ExperimentalprocedureInthisstudy,differentproportionsofrecycledaggregateswereselectedforconcretespecimenpreparation.Firstly,recycledaggregatesandnaturalaggregatesweremixedinacertainproportion.Then,cement,aggregatesandmortarweremixedaccordingtoafixedmixproportion.Finally,themixedconcreteslurrywaspouredintothemold,andafteracertaincuringtime,thespecimensweretakenoutfortesting.4.ExperimentalresultsandanalysisThecompressivestrengthtestofconcretespecimenswithdifferentproportionsofrecycledaggregateswasconducted,andtheexperimentalresultsareshowninthefollowingtable:Table1.Influenceofdifferentproportionsofrecycledaggregatesonconcretecompressivestrength|Recycledaggregatesproportion(%)|Compressivestrength(MPa)||-----------------|---------------||0|50.2||10|48.5||20|47.0||30|44.3||40|42.1||50|38.7|Fromthetable,itcanbeseenthatwiththeincreaseofrecycledaggregatesproportion,thecompressivestrengthofconcretegraduallydecreases.Whentherecycledaggregatesproportionis40%,thecompressivestrengthofconcretedecreasesbyabout15%.Thisisbecausetheirregularparticleshapeandroughsurfaceofrecycledaggregatesreducethebondingareawithcementitiousmatrix,thusaffectingtheimprovementofconcretecompressivestrength.5.ConclusionThisstudyinvestigatedtheinfluenceofdifferentproportionsofrecycledaggregatesonconcretestrength.Theexperimentalresultsshowedthattheinclusionofrecycledaggregateswouldreducethecompressivestrengthofconcrete.However,theuseofrecycledaggregatescaneffectivelyreducewasteemissionsandhasacertainenvironmentalprotectioneffect.Therefore,inpracticalengineering,theproportionofrecycledaggregatescanbereasonablydeterminedaccordingtospecificconditionsinordertoachieve