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ID:36754569
大小:2.00 MB
页数:75页
时间:2019-05-14
《自密实混凝土配合比设计及性能研究》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、ABSTRACTAmongthematerjalsman-made,concfeteis0neofthemostwjdelyandlargelyusedeconomicalbuildingones.C’urrently'thetechnOlogyofthecOncretehastw0maindirection,oneistodeVel叩thehighstren分handpedb皿anceconcrete,andtheOthcrjstomakeOrdinaryconcretehigh.perfomanced,soastopr010ngits1if
2、c-spaIl行om40巧0yeafsto60~70years.withthe伊adualdcvel叩mentofheiglltofbuildingsandsteelbarclose—packed,aswellasthedemandOftlleundergmundprqect,self-compactingconcrcteis、Ⅳorkedout.Itisembodimemofthehi曲-perforceconcretethatundefitsownwei曲t,self-锄pactionc∞crcteflowsjntoplaceandarou
3、ndobstnJctionstofiHthefomwOrkcOmpletely锄dself-compact,withoutanysegrcgationandblocbng.SeIf-compactingconcretecoⅡtainedalowIatioofwatertocement,ahiglIdosageOfpowder,aswellasahighdosageofsuperplasticizer,ensuresadequatefillingability孤dpassingabilities.Inordert0realizethere西ona
4、lrawmatefialsmix-desi印ed,11leexperimentofmortar锄ountenou曲tocnableconcreteself-compacIingaIldtheintemationalrelationshipbe觚eentherawmaterials,suchastheinfluenceofcoarseag孕egatevol啪eonthenuidity,tlleinfluenceofthecoarseag伊egateDmaxandthefineag掣egateMxonthcma】(jmumofcoarseag掣eg
5、ate,theinnuenceofthecoarseaggregateDmaxandthefineag掣egateMxonthemix-waterrequirement,theinnuenceoffumeminimumamount∞theworkabilityOf丘eshconcrete,arestudiedinthisp印eLT1lemixtllreinwhichthefixedv01啪ecoarseag掣egateispackedwithmonarisdesignedinthispapeLT1lemainfeatureofthisnewme
6、thodisthattheworkabilityof丘eshconcreteisdesi印edtllrou曲thecontmlofrheologicalpmpeniesaⅡdvolumeoffrcshmonarundertheconditionthatthemixtures仃en百hisdecidedbywate卜cementmtio.AdJustmentmargincoe彤cientofmortaLT1lispaperdevotemuchontheperfb肌anceoftheself.compactinghjgh-perfb加aIlceco
7、ncrete,invirtueofthetestsontheworkabilityoftheself_compactingconcrete,suchasslump,U-boxaIldL广boxalOngwiththemethodofmixdesign,aIldtheresultdesiTablyver王fiesthevalidjtyofthemethodoftllemixdesignadoptedinthispaper.IIInconclusion,comparcwiththeordinaryconcrcte,sometestsonthedur
8、abilityoftheself_compactingconcrctehavebeendoneinthispaper'indudingcarboniz
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