c80矿渣高强混凝土的试验研究

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1、西北T业大学硕上学位论文ABSTRACTABSTRACTHighstrength&highperformanceconcretecameintobeingasanewconstructionmaterialin1980's.Foritsdesiredpropertiesincludinghighstrength,longdurabilityandgoodworkability,ithasbeenshownremarkablyeconomicinreplacingtraditionalconcretestructureandbuildingspecialstruc

2、tureusingintheaggressiveenvironment.Ithasbeenprophesiedthattheconcretewithstrengthover100MPawillbewidelyused.Throughsystematicallyanalyzingthecompositionandstructureofconcretefromthreelevelsofmacroscopic,microcosmicandultra-microcosmic,theauthorofthispaperfoundthatthemechanicalproper

3、tiesanddurabilityofconcretedependedonmainlyitscompositionandstructure.Theinterface,whichisoneofthreecompositionofconcrete(hardenedcementpaste,aggregateandinterface),isthemostweakzoneinconcrete.Therefore,thekeytoimprovestrengthanddurabilityoftheconcreteistodecreaseflawsofconcrete,espe

4、ciallytomelioratethestructureofinterface,whichwillimprovethecompactnessandcohesionofinterface,thusimprovethestrengthanddurabilityoftheconcrete.ByusingthemethodofaddingordinaryPortlandcementwithfinemineraladmixtureandsuperplasticizerandthemixingprocessofStoneEnvelopedwithCement,thehig

5、hstrength&highperformanceconcretewithstrengthof85MPaandslumpof120mmareproduced,andthemethodofproducingC80highstrength&highperformanceconcretearerecommendedinthispaper.Thisexperimentiscarriedoutcomplyingwithorthogonaltest-schema,thentheauthorcarryonsystematicstatisticalanalysistothete

6、stdatawithSPSS.Itanalyzestheeffectofwater/binderratio,percentageofsilicafumeandslagandsuperplasticizeronthestrengthofthehighstrength&highperformanceconcrete.Andthen,theoptimumofmixproportionsofeverycompositionisacquiredaccordingtothecomprehensive西北工业大学硕}学位论文ABSTRACTequilibrationtheor

7、y.Simultaneously,regressionanalysisiscarriedoutbetweenthe28dcompressivestrengthofHSCandthebinder/waterratiowithnovariationofotherfactors.Theresultoftheexperimentsshowsthattheefectsofcompoundpozzolanicandmicro-aggregatehavebeenproducedwhensilicafumeandslagwereaddedintoconcretetogether

8、.AndtheStone