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毕业设计（论文）学生姓名：王可学号：1101041323专业：建筑工程技术系部：环境科学与工程系设计(论文)题目：再生骨料取代率对混凝土(C20)抗压强度的影响指导教师:唐亮2014年6月5日I摘要随着我国经济的快速发展和城镇化建设进程的加快,基础建设规模越来越大,拆除旧建筑产生了大量的建筑垃圾,而每年用于浇筑混凝土的集料消耗上亿m3,带来了一系列自然资源、环境污染、能源消耗和可持续发展的问题。为了缓解这一矛盾,再生骨料及再生混凝土的开发应用研究已被广泛关注,成为目前有待解决的关键技术之一。本试验充分利用实验室里废弃的混凝土试块，将其压碎作为再生骨料来代替原生骨料其取代率分别为100%，75%，50%，0%每个取代率分别做四组试验（每组三个）其龄期分别为28d45d60d90d的混凝土试块（按照C20混凝土配合比做混凝土试块），在达到试验所需龄期后做混凝土立方体抗压强度的试验并对试验结果进行对比分析。试验证明：在同一配合比下同一龄期的不同取代率的混凝土试块的立方体抗压强度不一样；在同一配合比下的同一取代率的不同龄期的的混凝土试块的立方体抗压强度不一样。关键词：废弃混凝土试块再生骨料立方体抗压强度IIAbstract:WithChina'srapideconomicdevelopmentandtheacceleratedprocessofurbanization,theincreasingscaleofinfrastructureconstruction,demolitionofoldbuildingshavealotofconstructionwaste,andtheannualaggregateforconcretepouringbillionsofconsumptionm3,withtoaseriesofnaturalresources,environmentalpollution,energyconsumptionandsustainabledevelopment.Inordertoalleviatethisproblem,recycledaggregateandrecycledconcretedevelopmentandapplicationofresearchhasbeenwidespreadconcern,becomeoneofthekeytechnologiessolved.Thefulluseofthelaboratorytestingofwasteconcreteblock,asitcrushedrecycledaggregatetoreplacetheoriginalaggregateofitsreplacementratewas100%,75%,50%,0%,separatelyforeachreplacementoffourtests(groupsofthree)ofitsageis28d45d60d90doftheconcreteblock(accordingtoC20concretemixcomparedtheconcreteblock),theagerequiredtotestforconcretecubecompressivestrengthafterthetestandthetestresultswereanalyzed.Teststoprove:thesameratiointhesameagewithdifferentreplacementratesofthecubecompressivestrengthofconcreteblockarenotthesame;inthesameratiothesamewiththereplacementofthedifferentagesofthecubecompressivestrengthofconcreteblocknotthesame.Keywords:AbandonedconcreteblockRecycledaggregateThecubecompressivestrengthIII目录摘要..................................................................................................................................................................ⅠAbstract..........................................................................................................................................Ⅱ目录.................................................................................................................................................................Ⅲ1.绪论.................................................................................................................................................................11.1引言........................................................................................................................................................１1.2再生混凝土产生的历史背景...........................................................................................................１1.2.1再生骨料的特性........................................................................................................................１1.2.2再生混凝土的目前现状..........................................................................................................１1.2.3再生混凝土的应用意义..........................................................................................................２1.2.4再生混凝土的发展方向.............................................................................................３1.3研究目的和试验方法.........................................................................................................３2.试验流程及其具体操作方法..........................................................................................................42.1试验原材料...........................................................................................................................42.2试验流程...............................................................................................................................42.3相关试验介绍.......................................................................................................................42.3.1砂的含水率试验........................................................................................................４2.3.2再生骨料的含水率试验..............................................................................................52.3.3再生骨料的筛析试验..................................................................................................52.3.4混凝土取代率的试压块试验......................................................................................52.3.5混凝土的坍落度试验..................................................................................................62.3.6水泥的细度试验.........................................................................................................62.3.7水泥净浆凝结时间......................................................................................................72.3.8混凝土立方体抗压强度实验原理..............................................................................72.3.9水泥的体积安定性......................................................................................................83.配合比设计及试验数据分析..........................................................................................................93.1配合比设计及计算.......................................................................................................