再生粗骨料高强混凝土力学性能研究

《再生粗骨料高强混凝土力学性能研究》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、西南交通大学硕士学位论文再生粗骨料高强混凝土力学性能研究姓名：鲁雪冬申请学位级别：硕士专业：桥梁与隧道工程指导教师：叶跃忠20060701西南交通大学硕士研究生学位论文第1I页AbstractWiththerapiddevelopmentofthebuildingindusuy,thewasteofbuildinghavebeengrowingdaybyday,andmostofthemarewasteconcrete．Besidesthechargeforanabundanceofwasmdi

2、sposalisverymuch,italsoisharmtotheenvironmentandsociety．n峙technologyofusingrecycledaggregatetoconfectrecycledconcretenotonlymayresolvethepollutionoftheenvironmentbythewasteconcrete，butalsorelievesthecontradictionofsupplyanddemandforaggregate．Becauseo

3、fthelimittotechnologyandeconomy,nowlittlesystematicresearchonit．111epapermainlystudiesontheworkabilityandmechanicalpropertiesofrecycledaggregatehighstrengthconcreteandlooksforthewayshowrecycledcoarseaggregatehie,hstrengthconcreteusesinthefact。111epap

4、ergenerallyexaminesthephysicalpropertiesoftherecycledCOarSeaggregate．comparesthemwiththatofthenaturalcoarseaggregate．Andthereasonscausingdifferencesbetweenthetwokindsofaggregate．Allexperimentstakeorthogonalexperimentdesignandeachconcretemixtureratioc

5、onsidersfiveinfluencesfactors，includingwatercement、flyash、siliconash，FDNandtherecycledcoarseaggregate．Andanalysesthatthefivefactorshaveaneffectontheworkabilityandmechanicalpropertiesofrecycledcoarseaggregatehighstrengthconcrete．‘ThePaperinvestigatest

6、heoldcementmortar'sactivityinrecycledconcrete．thesurfacestructureofrecycledconcrete，theinterfacialzonebetweencoarseaggregateandcementpaste(IZAP)andtheactionmechanismofsuper-freemineralmixtureandprovidesthetheoreticalbasisforfurtherresearch．Theresulto

7、fthispapershowsthatadoptingthetechnologyofmixingwithsuper-finemineralmixtureandhisheffectivewaterreducerandthetechnologyofpre-vettingtherecycledaggregateCallmaketherecycledconcreteofhighstrength．1eotards：RecycledcoarseAggregate；Recycledcoarseaggregat

8、eshighstrengthconcrete；Workability；,Mechanicalproperties；Mechanismanalyses．西南交通大学硕士研究生学位论文第1页1．1研究的目的和意义第1章绪论1．1．1课题的提出水泥混凝土的产生对人类文明和进步发挥了积极推动作用，但随着混凝土需求的急剧增长和废旧混凝土的大量产生，由此引发的资源、能源和环境问题也日益严重。以我国当前混凝土产量20亿立方米计，需要使用水泥8亿吨，需消耗天然砂石36亿吨以上。统计表明，生产每吨水泥需消耗石灰石