外文翻译粉煤灰高性能混凝土的工程应用适用于外文翻译 大学毕业设计.docx
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外文翻译粉煤灰高性能混凝土的工程应用适用于外文翻译 大学毕业设计.docx
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外文翻译粉煤灰高性能混凝土的工程应用适用于外文翻译大学毕业设计
Projectapplicationofthehigh-performanceconcreteofflyash
[Thesummary]
Everyperformanceofthistexttohigh-performanceconcreteofflyashhasdonedetailedresearch,andtotheconcreterespectivelytopersonwhomixofflyashKindsofinfluenceofperformanceandflyashconcretesomequestionsthatshouldnoticecarryonanalysisanddiscussioninnotconstructing.
1.Summary
Flyash,asakindofindustrialwastematerial,resourcesareabundant,cheap,andcontainalargeamountofactivecomposition,itismodernconcreteCentralAfricaAoftenimportantcomponentpart.Thehigh-qualityflyashisappliedtotheconcreterationally,notonlycanreplacethecementpartly,savethefabricationcostoftheproject,And,itspeculiarperformancecanbeusedintheconcreteofvariouskindsofinstructionsforuseveryeffectively,improvetheperformanceoftheconcrete,Itistheidealinthehigh-performanceconcretethatadmixesthematerial.Amongitisatconcretenotmodern,whosenameisalreadywithcementinflyash,collectmaterial,water,admixtureandKindisimportant,becomeacomponentpartinconcrete.Flyashhigh-performanceconcreteregarddurabilityasmaingoalgoondesignmixCongealthesoil.Itregardsexcellentdurability(insteadofthehighstrength)asthemaincharacteristic,thatistosay,concretecapitalofanygradeofintensityCanmakeintothehighdurabilityconcrete.Inordertoreachhighdurability,theperformancethattheflyashconcreteshouldpossessis:
MixingthestatenewlywellWork,namely,withoutemanating,secretingbywater,sothatshapingtheeven,closelyknitbymobility,hardennotshrinkingsubsidingearlywaterandWatershrinklight,warmtoriselow,hardencourseisitdwindletodo,inordertoreachhavingtheinitialcrack,thepermeabilityafterhardenningislow.
2."function"and"effect"oftheflyashareflyashmaterialtechnologyandapplicationfoundationoftheproject.
MixandaddthepowderoftheconcreteCoalash,inconformitywithunderstandingthatthefunctionoftheflyashismadeoverallly,by"volcanicashreact"and"economiccomponentpart"generaltoflyashoriginallyRead,expandtechnologicalconsciousnessof"flyasheffect"to,makeflyashfunctioncanserveperformanceofconcreteimprovewithqualityraisingbetter.Theroleinconcreteofflyashhasthefollowingseveralpoints:
(1).Shapeeffect:
Itisspongyvitreousbody,littlepearlofsilicateglassofaluminiumthatthemainmineraloftheflyashmakesup,smooththebodysurfaceofthesesphericalglass,thegrainsizeisthin,thequalityispre-pressing,insidesmallerthanthesurfacearea,thestrengthofabsorbingtowaterissmall,thislineofphysicalcharacteristics,reduceconcreterubobstructioninside,favorabletoimprovement,concreteofmobilitynotmerely;And,have"reducingwater"functioninvariousdegreeontheconcrete;
(2).Activeeffect:
TheactivecompositionSiO2oftheflyashandwaterresultofAI2O3andcementreactinasituationthatthereiswater,producingwatersilicicacidcalcium(C-S-H)andwatersourcalcium(C-A-S-H)ofsulphuraluminium,theseresponsesnearlyallgooninthegrouthole,waterthatproduceresultpack,cutaparttheheavyoriginalhole,maketheholethinning,canreducetheholeratewithintheconcrete,changetheholestructure,improveglueingthefunctionofformingofconcreteeverycomponentpart;
(3).Collectthematerialeffectalittle:
Verysmallparticleofflyasheventoisitamongcementparticle,packtheholetodistribute,playaroleingettingto"thinninghole",meanwhile,preventglueinggatheringeachotherofthecementparticle,andmakeitinstateofdispersing,helpwaterofthemixturetoreact,theflyashwillnotbetotallywithreactingwithwaterresultofthecement,cankeepits"collectingthematerialeffectalittle"foralongtime;
(4).Effectoftheinterface:
Itistheweaklinkintheconcretestructuretocollecttheinterfacebetweenthematerialandcementstone,widthoftransitionareaaswaterfordustthan,collecttherearen’tmaterial,transitionareahavethangroutbodymore,heavyhole.Mixingcanreducetheregionalwidthofthetransitiontoaddtheflyash,interfereCa(OH)orientationof2crystalinthetransitionarea,improvetheintensityofinterfaceanddensityintheconcrete.
(5)PerformanceoftheflyashconcreteThechangeoftheflyashtoconcreteperformancecanbedividedintothreestages:
1.Mixconcretestagenewly:
Influencethecoagulationtimeoftheconcrete,isimprovingandeasy,changerheologynature,canimprovepump,etc.;
(6).Theconcretestagewhilehardenning:
Regulatethecourseofhardenning,reducetheheatofhydration;3.Theconcretestageafterhardenning:
Raisetheintensityonlaterstage,raiseeverydurability,suchasanti-permeability,resistthesulphatecorroding,suppressthealkali-Collectthematerialandreactetc..
3.1Intensity
Theflyashhasthreekindsofinfluenceontheintensityofconcrete:
Reducewaterconsumption,increasegluedmaterialcontentandreflectthroughthelong-termvolcanicashthatraiseshisintensity.Theparticleintheflyashoflowcalciumisthesiliconoxygentetrahedronstructure,one’sownactivationisverylow.Inthefinalresultofthecement,highalkalinewatersilicicacidcalciumandcrystallizationof2colloidofCa(OH)areverylowinintensity,especiallyCa(OH)2askvigoroustocome1-2%,stoneofintensityonly,butCa(OH)2volumeaccountforwholecement25%,stoneofvolume.Alargenumberofsilicon,aluminiumoxidethatcontainintheflyash,canandhighalkalinewatersilicicacidcalcium2responsestakeplacewithCa(OH)2progressively,produceintensitythanhighlowalkalinewatersilicicacidcalcium,so,makecementstonewatergluecongealquantityofmaterialincrease,andmakeitsqualityimprovedbyalargemargin,isfavorabletotheimprovementoftheintensityofconcrete.Meanwhile,toisitcandispersecementparticletomixflyash,makecementtobeinksufficient,improvecloselyknitdegreeofthegrout,maketheintensityoftheinterfacesoftheaggregateandgroutintheconcreteimprove.Flyashisitdrawintensitycomparewithcontributionofthebendingstrengthcompressionstrengthtobeheavytoconfrontwitheachother,thisisusefultoresistingtheperformanceofsplittingofconcrete.Theelasticmouldamountoftheflyashconcreteissimilartocompressionstrength,itisearlyandonthelowside,improveprogressivelylaterstage,get28dtheconstantbasicconcreteisraisedby5-10%.Withtoholdstrengthofwrappingupinreinforcingbar,28d,flyashofconcreteisitformintensitythesamewith,etc.basicconcreteofgradebasicallytoglue,buthomogeneity,flyashofconcretefine,isitformintensitypersonwhotestgettingdispersedandkindthanbasicconcretetoglue.
Watertwotimesoftheflyashreactsandgenerallystartsaftertheconcretebuilds14d,whentemperatureislow,willreflectnecessarytimeislonger.Ifstrictwithearlyintensityoftheconcrete,themixingamountoftheflyashisunsuitabletoexceed30%,winterconstructionlargevolumeattheconcrete,themixingamountoftheflyashisunsuitabletoexceed20%non-.BecausemodernconcreteChinaandforeigncountriesadduseofpharmaceutical,ononehand,reducibleconcretemixandstirwaterconsumption,itreducebydustwaterthan,ofnotlastingconcretedensityofcement;Ontheotherhand,water-reducingagentcanmakecementsilicicacidcalciuminkCa(OH)produced2increase,helpflyashandwatertwotimesof2ofCa(OH)toreflect,excitestheactivationoftheflyash,thiseffectualforearlyintensitytoimproveflyash,inadditionuseflyashactivationexcitepharmaceuticalorinlargevolumeusestrongcementearlyamongtheconcretenon-,cancompensatemixingtheimpactonearlyintensityofconcreteofflyashtoo.
3.2peaceability
Whetherflyashtherearethefollowingseveralpointstoconcreteandgettingeasyimprovementfunction.⑴.Thehigh-qualityflyashcontainsmorethan70%ofthesphericalvitreousbodies,toosmoothtohaveraisedanglethebodysurfaceofthesesphericalglass,performanceissteady,playakindoflubricatedfunctionwhichissimilartothebearinginthepumpsending,shakingthecourseofsmashingoftheconcrete;⑵.Mixparticleapttogathergroupcementintheconcretenewly,toisitcandispersecementparticleeffectivelytomixflyash,releasemorethickliquidbodyisitlubricateaggregatetocome,helpconcreteworktheimprovementofperformance;⑶.Mixflyashcancompensatedetaileddeficiencyofbitsinthedetailedaggregate,cutoffmortarbasebodysecretecontinuity,waterofchannel,theflyashthatatthesametimequalityisgoodcanreducethemixingwaterconsumptionoftheconcreteunderthesameconsistency,makewaterdustofconcretethanreducelightlevelto,isitsecreteinkandemanatethephenomenontoreduce.
3.3shrinking
Theshrinkoftheconcreterelatestothefactthatthemixingwaterconsumptionandthickliquidbodybodyoftheconcreteareaccumulated,thelesswaterconsumptionis,shrinkthesmaller.High-qualityflyashwaterrequirementthansmallerthan100%,mixandstirreduction,waterofquantitymakemixflyashconcreteafterthe28dsincedrytoshrinkandnotdrytoshrinklittle.Flyashconcreteisitisitmixwithflyashimprovementofquantityreducetootocontracttodo.Butbecausewater,flyashofconcretereponseslowly,moistureevaporatefast,sobetweenflya
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