無機(jī)非金屬專業(yè)外文翻譯-粉煤灰高性能混凝土的工程應(yīng)用

AProjectProjectapplicationoftheHigh-performanceConcreteoffly[The[ThesummaryEveryperformanceofthistexttohigh-performanceconcreteofflyashhasdoneanalysisanddiscussioninnotconstructing.Flyash,asakindofindustrialwastematerial,resourcesareabundant,cheap,andcontainalargeamountofactivecomposition,itismodernconcreteCentralAfricaAoftenimportantcomponentpart.Thehigh-qualityflyashisappliedtotheconcreteforuseveryeffectively,improvetheperformanceoftheconcrete,Itistheidealinthehigh-performanceconcretethatadmixesthematerial.Amongitisatconcretenotmodern,whosenameisalreadywithcementinflyash,collectmaterial,water,admixtureandKindisimportant,becomeacomponentpartinconcrete.Flyashsoil.Itregardsexcellentdurability(insteadofthehighstrength)asthemainhighdurabilityconcrete.Inordertoreachhighdurability,theperformancethattheflyashconcreteshouldpossessis:MixingthestatenewlywellWork,namely,withoutnotshrinkingsubsidingearlywaterandWatershrinklight,warmtoriselow,hardenhardenningislow.applicationfoundationofapplicationfoundationoftheShapeeffect:Itisspongyvitreousbody,littlepearlofsilicateglassofaluminiumthatthemainmineraloftheflyashmakesup,smooththebodysurfaceofthesurfacearea,thestrengthofabsorbingtowaterissmall,thislineofphysicalcharacteristics,reduceconcreterubobstructioninside,favorabletoimprovement,ontheconcrete;Activeeffect:TheactivecompositionSiO2oftheflyashandwaterresultofAI2O3andcementreactinasituationthatthereiswater,producingwatersilicicacidcalcium(C-S-H)andwatersourcalcium(C-A-S-H)ofsulphuraluminium,thesechangetheholestructure,improveglueingthefunctionofformingofconcreteeverycomponentpart;Collectthematerialeffectalittle:Verysmallparticleofflyasheventoisitamongcementparticle,packtheholetodistribute,playaroleingettingto"thinninghole",meanwhile,preventglueinggatheringeachotherofthecementparticle,andmakeitinstateofdispersing,helpwaterofthemixturetoreact,theflyashwillnotbeeffectalittle"foralongtime;interfacebetweenthematerialandcementstone,widthoftransitionareaaswaterforanddensityintheconcrete.improvingandeasy,changerheologynature,canimprovepump,etc.;(2)Theconcretestagewhilehardenning:Regulatethecourseofhardenning,reducetheheatofhydration;(3)Theconcretestageafterhardenning:Raisetheintensityonlaterstage,raiseeverydurability,suchasanti-permeability,resistthesulphatecorroding,suppressthealkali-Collectthematerialandreactetc..Theflyashhasthreekindsofinfluenceontheintensityofconcrete:Reducewaterconsumption,increasegluedmaterialcontentandreflectthroughthelong-termvolcanicashthatraiseshisintensity.Theparticleintheflyashoflowcalciumisthesiliconcement,highalkalinewatersilicicacidcalciumandcrystallizationofcolloidofCa(OH)2areverylowinintensity,especiallyCa(OH)2askvigoroustocome1-2%,stoneofintensityonly,butCa(OH)2volumeaccountforwholecement25%,stoneofvolume.Alargenumberofsilicon,aluminiumoxidethatcontainintheflyash,canandhighalkalinewatersilicicacidcalciumresponsestakeplacewithCa(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)2produced2increase,helpflyashandwatertwotimesof2ofCa(OH)2toreflect,excitestheactivationoftheflyash,thiseffectualforearlyintensitytoimproveflyash,inadditionuseflyashactivationexcitepharmaceuticalorinlargevolumeusestrongcementearlyamongtheconcretenon-,canandWhetherflyashtherearethefollowingseveralpointstoconcreteandgettingeasyimprovementfunction.(1)Thehigh-qualityflyashcontainsmorethan70%ofthesphericalvitreousbodies,toosmoothtohaveraisedanglethebodysurfaceofthesesphericalglass,performanceissteady,playakindoflubricatedfunctionwhichissimilartothebearinginthepumpsending,shakingthecourseofsmashingoftheconcrete;cementparticleeffectivelytomixflyash,releasemorethickliquidbodyisitlubricateaggregatetocome,helpconcreteworktheimprovementofperformance;(3)Mixflyashcancompensatedetaileddeficiencyofbitsinthedetailedaggregate,cutoffmortarbasebodysecretecontinuity,waterofchannel,theflyashthatatthesametimequalityisgoodcanreducethemixingwaterconsumptionoftheconcreteunderthesameconsistency,makewaterdustofconcretethanreducelightlevelto,isitsecreteinkandTheshrinkoftheconcreterelatestothefactthatthemixingwaterconsumptionandthickliquidbodybodyoftheconcreteareaccumulated,thelesswaterconsumptionis,shrinkthesmaller.High-qualityflyashwaterrequirementthansmallerthan100%,mixandstirreduction,waterofquantitymakemixflyashconcreteafterthe28dsincedrytoshrinkandnotdrytoshrinklittle.Flyashconcreteisitisitmixwithflyashimprovementofquantityreducetootocontracttodo.Butbecausewater,flyashofconcretereponseslowly,moistureevaporatefast,sobetweenflyashandtodoepitometobeloudandverymuchheavyinearlydaysconcrete.Forpreventearlyshrink,flyashofconcretefromfracture,shouldstrengtheninearlydaysraisingtoitIssueinthepastwillitbeageoneday,intensityofconcreterelativelylow,issueisititmeetsanemergencytobeheavythanordinaryconcretetootocreepcorrespondingage,butwithordinaryconcreteflyashinoneageonecreepandwassmallerthantheordinaryconcreteafterthisconcreteofintensity.carbonizationconsumption,flyashofconcretereduce,cementwaterCa(OH)2toocorrespondingtoreducequantitythatappear,andvolcanicashisitconsumeCa(OH)2ofacertainamounttootoreact,makehydrogenionindexoftheconcretereduce,willincreasethespeedofcarbonizationoftheconcrete.Unlessespeciallyatwaterinearlydays,flyashthelowindegreeinresponseinvolcanicash,flyash-thereisthelooseinstructureinholeinsystemcement,CO2,O2,moisture,etc.invadeobstructionsmall,socarbonizationisrelativelylargeindepth.Withthegrowthofoneandgradualfullplayoftheflyashvolcanicasheffectofage,thespeedofcarbonizationwillbereducedgradually.Carbonization,flyashofconcreteaswaterfordustindepththanandflyashlastincreaseofquantityandnotincreasedtosomeextent.Than0.5-0.55inwaterdust,flyashpersonwhomixgreaterthan30%andunderthegeneralconstructionsituationofcompetence,thedepthofcarbonizationoftheconcretecanreachabout20mmin15-17.Carbonizationreactsandgoesonwithintherangeofcertainrelativehumidityfastest,otherwise,theresponseisrelativelyslow.Underoriscloseto100%25%intherelativehumidity,namelytheoccasionintheabundantdrynessorwatersaturationofconcrete,havemoredifficulttoproducecarbonizationshrinkconcretes.InsuchconcreteprojectswithCO2,cantakeplacecarbonizationreact,socanmixandaddtheflyashmore,inordertofullyreducetheheatofhydrationoftheconcrete,improvethedurabilityoftheconcrete.Itisultratobeadoptlawquantityreplace,watergluenotlowerthan,mixcarryonmatchratiodesignwater-reducingagentforadmixtureofmainfactatthesametime,canmakeflyashconcreteresistcarbonizationperformanceimprovetosomeextent.reinforcingbarReinforcingbarofconcretecanitantiruststobebecauseconcretegettingalkalinetoformonepre-pressingpassivationmembraneinmetalsurface.Isitaddflyashtomixamongconcrete,ononehanditconsumeCa(OH)2,reducethealkalienvironmentoftheconcrete;Ontheotherhand,flyash2responsesturnintothehyratewithCa(OH)2,raisecloselyknitdegreeoftheconcrete,increasetheimpermeabilityoftheconcreteandobstructionspreadtothechlorineion,hinderandpreventtheinvasionofCO2,canshieldthereinforcingbar,soflyashismixed,inpreventingthereinforcingbarcorrosion,canrange(FA≤24%)ofmixingamount,havenotinfluencedthereinforcingonargreaterthan30%,thecarbonizationoftheconcretecanmakehydrogenionindexoftheconcretedroppedtoabout8.5from12.5,undersolowahydrogenionindexcondition,thereinforcingbarisnolongerpassivated.Reachreinforcingbarpositionbydepthascarbonization,completecarbonization,ontermsthatwaterandoxygenarepermeatedantiabrasionlayer,reinforcingbarcantakeplacebutcorrosionleadtothefactfractureoftheconcreteevendestroy.heatofTheflyashisveryobvioustoreducingthefunctionoftheconcreteheatofhydration.Lowcalciumflyashwaterinthefirstseveraldaysobviousdegreehave,heatofhydrationproducedonlyandhalfofcement.Replace20%ofthecementwithflyashintheconcrete,canmaketheheatofhydrationofconcrete7ddropby11%.1-28dintheissue,roughlyformixpercentageofflyash,ShengWenandpercentagethatheatofhydrationreduceage.Flyashisitcanmakeheatofhydrationtimethatpeakappearisitappearto3dtodelaygenerallytomixamonglargevolumeconcrete,canpreventtheconcretefromproducingthetemperaturecrackeffectively.B［摘要量對混凝土各種性能的影響以及粉煤灰混凝土在施工中應(yīng)注意的一些問題進(jìn)行了分析和探討。概述2耐久性（而不是高強(qiáng)度）2下幾點(diǎn)：而且，對混凝土有不同程度的“減水”作用；活性效應(yīng)粉煤灰的活性成分SiO2Al2O3與水泥的水化產(chǎn)物在有水的情下發(fā)生反應(yīng)，生成水化硅酸鈣H和水化硫鋁酸鈣AH，這些反應(yīng)幾乎都在水泥漿孔隙中進(jìn)行，生成的水化產(chǎn)物填充、分割原來的大孔，使孔隙細(xì)化，可降低混凝土內(nèi)部的孔隙率，改變孔結(jié)構(gòu)，提高混凝土各組分的粘結(jié)作用；的作用，同時(shí)，阻止水泥顆粒的相互粘聚，而使之處于分散狀態(tài)，有孔隙。摻加粉煤灰能減小過渡區(qū)域?qū)挾?，干擾過渡區(qū)域中OH2晶體的取向性，提高混凝土中的界面強(qiáng)度和密實(shí)性。粉煤灰對混凝土性能的改變可分為三個階段：(1)新拌混凝土階段:影響混凝土強(qiáng)粉煤灰對混凝土強(qiáng)度有三種影響：減少用水量、增大膠結(jié)材含量和通過長期火山灰反應(yīng)提高其強(qiáng)度。低鈣粉煤灰中