Page 163 - 《水资源与水工程学报》2024年第2期
P. 163
!35 "!2 # & ' ( ) & * + , - Vol.35No.2
2024 $ 4 % JournalofWaterResources&WaterEngineering Apr.,2024
DOI:10.11705/j.issn.1672-643X.2024.02.18
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GHIJK:TV432 LMNOP:A LQRK:1672643X(2024)0215908
Macroandmicromechanicalpropertiesofmortar
undersulfateandclorideattack
2
1
1
1
LGuoer,SHANGJin,HUANGShanshan,LIShagang
(1.PowerChinaHuadongEngineeringCorporationLimited,Hangzhou311122,China;2.CollegeofHarbour,
CoastalandOffshoreEngineering,HohaiUniversity,Nanjing210024,China)
Abstract:Saltlakesandseawatercontainalargeamountofsulfatesandchlorides,whichcancausedeg
radationofunderwaterconcretestructuresfromtheoutersurfacetotheinnercore.Accordingtotheheter
ogeneouscorrosioncharacteristicsofmortarundersulfateandchlorideattack ,aseriesoftests,including
Xraydiffraction ,compressivestrength,splittingtensilestrengthandVickershardnesstests,werecon
ductedonsamplesexposedtodifferentcorrosionconditionstoinvestigatetheevolutionofphasecomposi
tionandmacroandmicromechanicalpropertiesofmortar.AVickershardnessevaluationmodelwasde
velopedbymodifyingLogisticfunction.Theresultsrevealedthatthecorrosionproductsofsulfateand
chloridedecreasedundercombinedsulfateandchlorideattack.Moreover ,thedistributionofVickers
hardnessalongdepthundercombinedattackcouldbedividedintothreephases ,namely,ascending,de
scendingandstablephase.TheproposedevaluationmodelaccuratelydescribedtheVickershardnessdis
tributionofmortarinsulfateandchlorideenvironment.Additionally,Vickershardnesswasshowntobe
effectiveinanalyzingtheevolutionofcompressionresistanceindifferentcorrosiondepths.Theresearch
findingscouldprovidesomereferencefordurabilityevaluationandrestorationofconcretestructures.
Keywords:sulfateattack;chlorideattack;mechanicalproperty;mortar;Vickershardnessevaluation
model
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