干燥大溫差氣候下混凝土含水量測定與顯微結(jié)構的研究.pdf

1、武漢理工大學碩士學位論文干燥大溫差氣候下混凝土含水量測定與顯微結(jié)構的研究姓名：佘安明申請學位級別：碩士專業(yè)：材料學指導教師：水中和20070501AbstractConcretehasbeenwidelyusedintheconstructionofinfrastructuresThepreparationanduseofconcretearealwaysinspecialenviromnents，someofwhichareharsh

2、，forexample，dryclimate，bigtemperaturechangeandcorrosivesubstancesetcThesebadconditionsnotonlybringsomedifficultiestothepreparationofconcreteandqualitycontrol，butariseseriousdamagestotheconcretestructuresTheproblemscaused

3、bythebadconditionswillbeharmfultothedurabilityandreducetheservicelifeofthestructure，whichwillresultingreatrepairexpenseThisthesisfocusesontheeffectofregionalclimate，whichisdryandbigtemperaturechange，onthepropertiesofconc

4、reteThetechniqueofwatercontentcontrollingwhenpreparingconcreteandtheinfluenceoftheregionenvironmentonthemicrostructureconcreteatearlyagesarestudiedInthisthesis，aspecialequipmentthewatercontentcheckerinfreshconcrete(WChec

5、ker)wasused；themicro，hadnesstestingmachineandscanningelectronmicroscopic(SEM)wereusedtoanalyzetheinterfacialtransitionzone(ITZ)ofconcrete；themercuryintrusionporosimeter(MIP)andopticsmicroscopewereusedtoinvestigatetheporo

6、sityandporesizedistributionofconcreteThefeasibilityofapplyinganewwatercontenttesttechniqueinfreshconcreteisstudiedCharacteristicsandformationmechanismofthemicrostructureinthedryandbigtemperaturechangeenvironmentisinvesti

7、gatedAccordingtotheresearchresults，followingconclusionsareobtained：1TheWCheckercantestthewatercontentoffreshconcreteviatestingitsaircontentandbulkdensityquicklyandpreciselyByusingthistechnique，itispossibletomonitorthewat

8、ercontent，adjusttheconcretemixproportionandcontroltheconcretequalityintheconstructionsite2Inthedryandbigtemperaturechangeenvironment，thewidthofITZbecomeswiderandthemeanvaluesofthelowestmicro—hardnessdecreasedobviouslytha