基于鈣離子侵析的混凝土化學損傷和力學損傷研究.pdf

1、河海大學碩士學位論文基于鈣離子侵析的混凝土化學損傷和力學損傷研究姓名：石端學申請學位級別：碩士專業(yè)：結構工程指導教師：張子明20060601abstractAbstract111econcreteiswidelyappliedasthebuildingmaterial，thusitalsoisfrequentlytestedandinfluencedbymanykindsofenvironmentUndertheenvironmento

2、fthemobilesoftwaterandcoffosivechemistrysolution，thechemicalandmechanicaldamagesofconcrete，speciallythecombinedeffectofthetwoonesaremainreasonsforthedeteriorationofconcretematerialBasedontheG6rardcalciumionleachingtheory

3、theoccurrencemechanismofthesetwokindsofdamagesiSstudiedwhichiShelrfultoforecasttheservicelifeofconcretestructureunderthecorrosiveenvironmentThecalciumplaysallimportantroleinbeingaindicatorincementclinker、thehydrationreac

4、tionandthehydratedproductStartingfromtheG6rardcalciumiononedimensionleachingsimplifiedmodel，withthecalciumionconcentratioatakenasaparameter，thecalciumionconcentrationvailationmodeofaconcretespecimencausedbytheleachingtim

5、eandpositionchangesinconcrete—holesolutionunder血emobilesoftwaterenvironmentiSsimulatedThesimulationiSmadebyestablishinganddividingthefilliteelementmeshwhichisdenseandchangesgraduallynecalciumionleachingisanextremelyslowp

6、rocess，therefore，byusingtheammoniumnitratesolutionwithconcentrationof480∥ltoacceleratethecalciumionleachingThechemicalreactionmechanismofhowtheammoniumnitratesolmionspeedsupthecalciumionleachingiSthoroughlystudiedinthisa

7、rticleAndthecalciumionconcentrationevolutionaryprocessintheconcreteholesolutionwiththeammonimnnitrateacceleratingissimulatedAccordingtothechangingofthecalciumionconcentrationintheconcreteholesolution廿leinflueneeofthechem

8、icaldamageontheconcreteconstitutiverelationsiSstudiedByworkingoutthefiniteelementprogramandapplyingdisplacement—load，thestresssituationofconcreteiSsimulatedwhenonlymechanicaIdamageandsimultaneouslychenticaIandmechanicald

9、amageiSconsideredFinallyaccordingtothechemicalandmechanicaldamagetheorythemechanicsperformanceofaconcretetubestructureSUfieredsomechemicaldamagearesimulatedThechemicaldamageofconcretespeciallymutualfunctionwiththemechani