aerated complex activated composites on silicate matrix of thermal-moisture hardening

1、AeratedcomplexactivatedcompositesonsilicatematrixofthermalmoisturehardeningYevgenLutskin1ElenaShinkevichYaninaMaryankoOdessaStateAcademyofCivilEngineeringArchitectureOdessa65029Didrikhsonastreet4UkraineAbstractThemodernn

2、anotechnologyreceptionsallowreceivingadvancedcompositesofsilicatematrixofthermalmoisturehardeningthelowpowertechnologytoday.Theaeratedcomplexactivatedcompositesonthesilicatematrixaremadebycastingtechnology.Adistinctivefe

3、atureofaeratedcompositesisthattheirpropertiesaccdingtothebasicphysicalmechanicalparametersexceedofthepropertiesofthesilicatematrix.Thetechnologicalfeaturesofobtainingeffectiveaeratedcompositesonsilicamatrixofthermalmoist

4、urehardeningsetout.Comparativeanalysisofchangesinthepropertiesofisoparametriclimesilicacompositesofthermalmoisturehardeningwithpefmingadditiveswithoutthemwascarried.Hardeningmechanismactivatedcompositeswasproposed.Itises

5、tablishedthatjointintroductioninalimesilicacompositesofthermalhardeningthealkalicontainingadditivescanimprovecrackresistancereducethedensityheatconductivitycompositesofthesamestrengthacteristics.iginalityThemechanismoffm

6、ationofstructurepropertiesofcomplexactivatedlimesilicamixturemodifiedbythefillerinthefmoftripolionthequicklimewasproposed.Itisshownthattheparticlesofthetripolicontributethestructureofsilicatematrixthefmationofdiscontinuo

7、usstructureofcapillariesincludingitsownmicroposity.Furthermeduetothehighsptioncapacitythetripolipesmaybethematrixffminghydrosilicatesofultrafinesizesthepropertiesdifferfromthepropertiesofthecalciumhydrosilicatesfmedinthe

8、headspaceofthemixture.Itcontributestoobtainingtheaeratedcompositeswithhighphysicalmechanicalproperties.Itwasestablishedthatthecomplexactivationofthelimesilicamixturestheirstructuralmodificationduetothecalciumlimealkaliad

9、mixturesmineraladditivesofthefixeddispersionprovidetheproductionoftheaeratedcompositesofthethermalmoisturehardeningtheeffectivewallsarticlesontheirbasisaccdingtotheenergysavingcastingtechnology.Accdingtotheresultsofoptim

10、izationarerecommendedacontentswhichallowtogetaaeratedcompositesonsilicatematrixgivengradesofstrengthheatconductivityfrostresistance:compressivestrengthRb–10MPa12.5MPadensityρ=13001400kgm3frostresistanceF25heatconductivit

11、yλ=0.300.40WtmKcriticalcoefficientofstressintensitykIc≥1MPam0.5coefficientofsofteningks≥0.9.Keywds:silicatematrixcastingtechnologycomplexactivationaeratedcompositesexperimentalstatisticalmodels1Crespondingauth:lutskin@Te

12、l380679239182Fax380487236904danglingbondswhichleadstothefmationoffreeradicalsinthecrystalswithcovalentbondstheamphizationfmolecularcrystals.Eachtypeofactivationwillbecausedbytheprevalenceofanytypeofdefmationsofthesolidph

13、asestructure.Thedifferenceswillberesponsiblefthenaturekindofdislocationswithallowanceftheextentdurationofexternalinternalinfluences.2.1.Mechanicalactivation.Mechanicaleffectsinthedispersionmediumspeedmixeractivatprovidem

14、echanochemicalactivationofcrystallinequartzsurface.Theterm“mechanochemicalreaction“wasintroducedbyW.Ostwaldin1891.Mechanochemicalactivationiscarriedouttothespecialpropertiesofthenewlyfmedsurfacesespeciallychangingtheloca

15、lchemicalphasecontentofsolidsaswellastheiraggregatestateofundertheinfluenceofmechanicaleffectsofhighintensity(ButtY.MSychevM.M.TimashevV.V.1980).Asnanotechnologyreceptionthemechanochemicalactivationreducestheviscosityof3

16、medispersedsystemcontaininglime(ShinkevichE.LutskinE.200420072008).Thiseffectofviscosityreducingwasusedtocompensatetheincreasedwaterdemofthemixtureintroducingthecompositepousopalcristobaliterocksusingtheactivationofthebi

17、ndertogetherwiththefineaggregate.2.2.Thermalactivation.Usingasabinderquicklimepromotesthe“inneractivation“ofdispersedsystemunderanelevatedtemperatureT=4060Cthefmationofmultiplepointcontactsinthedislocationfieldsareappear

18、edtheconditionsfthehydrationhardeningunrelatedinhydrouscalciumlimearecreated.Externalthermalactivationoccursinconditionsofthermalmoisturetreatment.InsuchconditionsatT=85Ccontradictioniscanceledwhichisconnectedwiththeincr

19、easingthequartzsolubilitydecreasinglimesolubilitywithincreasingitsdissolution(BabushkinV.I.MatveevG.M.MchedlovPetrosyanO.P.1986ShtarkJ.VihtB.2004).InadditiontheincreaseofpHsystemcausestocreatefavableconditionsflongevityg

20、rowthsGSKduringtheoperationalphasewhen11.5≤pH≤12.5.2.3.Chemicalactivation.AccdingtoE.Avvakumov’swks(AvvakumovE.G.2001)withthepresenceofwaterintheinganicsolidphasesystem“methodofsoftmechanochemicalsynthesis“ishappened.Too

21、btaincompositeoxidesfromthesimpleoxidehydroxidesareusedasthestartingcomponentsoneofwhichisacterizedbyacidictheotheroneisacterizedbybasicproperties.Bymeansoftheneutralizationreactiontheintensificationoftheprocessestakespl

22、ace.Inadditioninsuchsystemtheconditionsfthehydrothermalprocessesarecreated.Theacidactivationoccursbyintroducingtheamphouscrystallinesilicaalkalineactivation–theintroductionofincreasedamountsoflimeitraisespH.Thereplacemen

23、tofgroundquartzsinthebinderbyopalcristobaliterocksenhancestoincreasefrostwaterresistanceofthesilicatematrixwhilereducingitsdensitymatrixto2025%.Meoverthepresenceofopalcristobaliterockinthedispersioncausesfmationofnanosca

24、leintheGSKpesoftheserocksinthiscasetheyare“naneact“whichwallsrestrictthegrowthofneoplasm(PolleC.OwensF.2005).Alsothepresenceofparticlesofpousrockswithdifferentdispersionbinderallowsadjustingthespeedreactionkiicsofhydrati

25、on(ShinkevichE.2011LutskinE.2011).Theuseofquicklimedeterminesthepossibilityofusinghighmodulusliquidglassasoneofthealkaliadditionsothetemperatureriseonthefmingstageallowsregulatingrapidsettingofsuchmixture.Alkalialkalicon

26、tainingadditivesincreasethethermodynamicinstabilityofsystemsbyshiftingtheequilibriumcausedbythefmationofadditionaldefectsonthesurfaceofsilicacontainingcomponents.Alkalicontainingadditivesarecapabletoaerationofmixturesund

27、erthecertainconditions(GluhovskijV.D.RunovaR.F.1991KryvenkoP.V.PushkarevaE.K.1993).InthiswkthelowtemperatureaerationofconcreteduringintroductionoftheactivationtothemixturefthesilicatematrixbyliquidglassadditivesNa2OnSiO2