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掺合料对抗冲磨混凝土活化能的影响研究 Abstract Thepurposeofthisstudyistoinvestigatetheeffectsofadmixturesontheactivationenergyofimpactabrasionofconcrete.Theimpactabrasionresistanceisanimportantpropertyofconcrete,especiallyinapplicationswheretheconcreteisexposedtoheavyloadsandabrasiveforces.Inthisstudy,differenttypesofadmixtureswereaddedtotheconcretemixtoevaluatetheireffectontheactivationenergyofimpactabrasion.Theresultsshowedthattheadditionofcertainadmixturescansignificantlyimprovetheimpactabrasionresistanceofconcretebydecreasingtheactivationenergyrequiredforabrasion. Introduction Concreteiswidelyusedinconstructionduetoitsstrengthanddurability.However,concretestructuresaresusceptibletoimpactabrasion,whichcanreducetheirlifespanandintegrity.Impactabrasionisthewearingawayofconcreteduetoheavyloadsandabrasiveforces.Theresistanceofconcretetoimpactabrasionisanimportantpropertythatisnecessaryforlong-termdurabilityandlongevityofthestructure.Impactabrasioncancausesignificantdamagetoconcretesurfaces,andcanleadtocostlyrepairsorreplacement. Theperformanceofconcreteagainstimpactabrasioncanbeimprovedthroughtheadditionofadmixtures.Admixturesarematerialsthatareaddedtoconcretemixestoimprovetheirpropertiessuchasstrength,workability,anddurability.Inthisstudy,theeffectsofdifferenttypesofadmixturesontheactivationenergyofimpactabrasionofconcretewereinvestigated. MaterialsandMethods Theexperimentalstudywasconductedusingstandardconcretemixes.Portlandcement,fineaggregate,coarseaggregate,andwaterweremixedinaccordancewiththeASTMC192standardproportions.Differenttypesofadmixtureswereaddedtotheconcretemixturesatvariousdosages,asshowninTable1. Table1:Admixturetypesanddosages AdmixtureTypeDosage(%) Silicafume10% Flyash20% Microsilica5% Eachconcretemixwascastinto100x100x100mmcubesandcuredfor28days.Theimpactabrasiontestwasconductedonthecubesusinganimpactabrasiontester,inaccordancewiththeASTMC-418standard.Thetestwasconductedatambienttemperature,andtheimpactenergywasvariedfrom8Jto16J.Themasslossofthecubeswasmeasuredafter