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:1672643X(2024)0215908

                              Macroandmicromechanicalpropertiesofmortar
                                         undersulfateandclorideattack

                                                                                        2
                                                                           1
                                                       1
                                          1
                                 LGuoer,SHANGJin,HUANGShanshan,LIShagang
                     (1.PowerChinaHuadongEngineeringCorporationLimited,Hangzhou311122,China;2.CollegeofHarbour,
                                CoastalandOffshoreEngineering,HohaiUniversity,Nanjing210024,China)
                 Abstract:Saltlakesandseawatercontainalargeamountofsulfatesandchlorides,whichcancausedeg
                 radationofunderwaterconcretestructuresfromtheoutersurfacetotheinnercore.Accordingtotheheter
                 ogeneouscorrosioncharacteristicsofmortarundersulfateandchlorideattack ,aseriesoftests,including
                 Xraydiffraction ,compressivestrength,splittingtensilestrengthandVickershardnesstests,werecon
                 ductedonsamplesexposedtodifferentcorrosionconditionstoinvestigatetheevolutionofphasecomposi
                 tionandmacroandmicromechanicalpropertiesofmortar.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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