多重因素作用下碳化混凝土的抗凍性.pdf

1、南京航空航天大學碩士學位論文多重因素作用下碳化混凝土的抗凍性姓名：燕坤申請學位級別：碩士專業(yè)：結構工程指導教師：余紅發(fā)黃東升20070601多重因素作用下碳化混凝土的抗凍性iiAbstractAsknowncrosionfreezingthawingdamageexistinthecrosiveenvironmentinNthChina.Inadditiontheeffectofcarbonizationshouldbeconsider

2、edtotheconcreteofstructurewithhighcontentmineraladmixture.Actuallythedurabilityofconcreteinengineeringstructuresisverycomplexitisakindofdurabilityintheeffectofcarbonizationcrosionfreezingthawingcyclesmultifactscouplingso

3、on.Inthispapergreenhighdurableconcrete(GHDC)wereproptionedonbasesoftheproptionprincipalsofgreenhighperfmanceconcrete(GHPC)incpatedwithsynergisticeffectofmineraladmixturewaterreducingairentrainingpropertiesofconcreteadmix

4、tureshrinkagecompensationfunctionsofexpansionagentreinfcingeffectsoffibers.dinaryPtlcementconcrete(OPC)concretewithhighcontentmineraladmixture(HCMC)werepreparedfthebaselineofexperimentalresearch.Throughthemethodofacceler

5、atedfreezingthawingtestthefreezingthawingdurabilityofcarbonizedOPCcarbonizedHCMCcarbonizedGHDCwithwithoutloadingwerestudiedwhichsubjectedtowater5%MgSO4solution10%NaClsolution5%MgCl25%Na2SO4compositesolution.Deteriationpr

6、ocessfeaturesofconcretessubjectedtotheactionsofsingledoublemultiplefactswereinvestigatedbyalargenumberoflabatialexperiments.ThesecretofGHDCwithlongservicelifehighdurabilitywascaughtout.AlthoughGHDCiscarbonizedbadlyitalso

7、hasahighdurabilitysubjectedtoMgSO4solutionNaClsolution(MgCl2Na2SO4)compositesolutionflexuralstressfreezingthawingcyclestheircombination.Basedonthedeteriationfeaturesofconcretesamplestriaxialfatiguetensilestresswasusedtos

8、imulatethestressinsideofconcretesapproximativelyduringthefreezingthawingcycles.Amathematicalmodeloffreezingthawingfatiguedamagewasestablishedfoundondamagetheytheyoffreezingthawingdurabilityfatiguedamageequationofconcrete