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1、ConcretecarbonationanalysisPickto:buildingofconcretecarbonation,hasgreatinfluenceonitsdurability,seriouswhenmakeconcretecrack,flake,protectivedestruction,whicheventuallyledtothestructuresdestroyed.Thispapermechanismandinfluencingfactorsofconcretecarbonationisanalyzed,andputsforwardthein
2、ductionofconcretecarbonationsimpletestmethodsandpreventingmeasures.Themanagementonthehydraulicstructureconcretemaintenanceandpreventagingaretohavethecertainreferencevalue.Keywords:concretecarbonationanalysisBuildingsinconcretestructure,andtheconcretestructurecomposedmorethanthebadclimat
3、eenvironmentis,thesediment,waters,physics,chemistry,temperature,etcmanyinfluentialfactors.Concretedestructiontocarbide,freeze-thawdamage,whichisacommoninmanybuildingsrunninglifeismuchshorter,causingtremendouswaste.Itisnecessarytofurtherexploreofconcretecarbonationhydraulicstructures,fre
4、eze-thawfailuremechanismandpreventivemeasures.2concretecarbonation,freeze-thawfailuremechanismanalysis1.Themechanismofconcretecarbonationinthreesilicatemineralscementcalciumandcalciumcontentmore,twosilicateabout75%ofthetotalweight,cementhydration,completelythehydrationcalciumsilicategel
5、generationaccountsfor50%ofthetotalvolume,about25%ofcalciumhydroxide,mainlydependsonthestrengthofthecementpaste.thehydrationcalciumsilicate,thecontentofwatershutoffinconcreteaccountedfor25%ofthetotalvolume.Concretehasthecharacteristicsofcapillary-porestructure,thesecapillary-poreincludin
6、gconcretemoldingremainedonthecementpaste.thebubble,thewoolstomaandgelhole,andcementstoneandaggregatecontactplacecaitieswhichact,etc.Inaddition,stillmayexistbecausethecementpaste.thedryingshrinkageandtemperaturedeformationcausedbymicrocracks.Ordinaryconcreteporosityofgeneralnofewerthanei
7、ght-10%.Concretecarbonationreferstothefirstcarbondioxideintheatmospherepermeatestheporesinconcrete,andthendissolvedinwater,andthewoolstomacementhydrationprocessproduceshydrationcalciumsilicateandcalciumhydroxideetchydrationproductsgeneratecalciumcarbonateinteractions,suchproduc
