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CHANGCHUNINSTITUTEOFTECHNOLOGYBUILDINGCONSTRUCTIONCONCRETECRACKOFPREVENTIONANDPROCESSING混凝土的裂缝、预防与处理资料来源IRISHGEOTECHNICALSERVICESLTD设计题目长春钻石礼都4楼土建施工设计学生姓名学院名称土木工程学院专业名称土木工程班级名称土木1042学号指导教师教师职称讲师完成时间2014年3月15日2014年3月15日ABSTRACTTHECRACKPROBLEMOFCONCRETEISAWIDESPREADEXISTENCEBUTAGAINDIFFICULTINSOLVEOFENGINEERINGACTUALPROBLEM,THISTEXTCARRIEDONASTUDYANALYSISTOALITTLEBITFAMILIARCRACKPROBLEMINTHECONCRETEENGINEERING,ANDAIMATCONCRETETHECIRCUMSTANCEPUTFORWARDSOMEPREVENTION,PROCESSINGMEASUREKEYWORDCONCRETECRACKPREVENTIONPROCESSINGFOREWORDCONCRETESISING1KINDISANTICIPATEBYTHEFREESTONEBONE,CEMENT,WATERANDOTHERMIXTUREBUTFORMATIONOFTHEINADDITIONMATERIALOFQUALITYBRITTLENESSNOTANDALLMATERIALBECAUSETHECONCRETECONSTRUCTIONTRANSFORMWITHONESELF,CONTROLETCASERIESPROBLEM,HARDENMODELOFINTHECONCRETEEXISTENCENUMEROUSTINYHOLE,SPIRITCAVEANDTINYCRACK,ISEXACTLYBECAUSETHESEBEGINNINGSTARTBLEMISHOFEXISTENCEJUSTMAKETHECONCRETEPRESENTONESOMENOTANDALLTHECHARACTERISTICOFQUALITYTHETINYCRACKISAKINDOFHARMLESSCRACKANDACCEPTCONCRETEHEAVY,DEFENDSHENANDALITTLEBITOTHERUSEFUNCTIONNOTACREATIONTOENDANGERBUTAFTERTHECONCRETEBESUBJECTEDTOLOTUSCARRY,DIFFERENCEINTEMPERATUREETCFUNCTION,TINYCRACKWOULDCONTINUOUSLYOFEXPANDWITHCONNECT,ENDFORMATIONWECANSEEWITHOUTTHEAIDOFINSTRUMENTSOFMACROVIEWTHECRACKBEALSOTHECRACKTHATTHECONCRETEOFTENSAYINTHEENGINEERINGCONCRETEBUILDINGANDGOUPIECEUSUALLYALLTAKESEWERTOMAKEOF,BECAUSEOFCRACKOFEXISTENCEANDDEVELOPMENTUSUALLYMAKEINNERPARTOFREINFORCINGBARETCMATERIALCREATIONDECAY,LOWERREINFORCEDCONCRETEMATERIALOFLOADINGABILITY,DURABLEANDANTISHENABILITY,INFLUENCEBUILDINGOFEXTERNALAPPEARANCE,SERVICELIFE,SEVERITYWILLTHREATARRIVEPEOPLESLIFEANDPROPERTYSAFETYALOTOFALLOFCRASHOFENGINEERINGSISBECAUSEOFTHEUNSTEADYDEVELOPMENTOFTHECRACKWITHTHERESULTTHATMODERNAGESCIENCERESEARCHWITHAGREATDEALOFOFTHECONCRETEENGINEERINGPRACTICECERTIFICATE,INTHECONCRETEENGINEERINGCRACKPROBLEMISINELUCTABLE,ALSOACCEPTABLEINCERTAINLYOFTHESCOPEJUSTNEEDTOADOPTVALIDOFMEASUREWILLITENDANGERDEGREECONTROLATCERTAINOFSCOPEINSIDETHEREINFORCEDCONCRETENORMISALSOEXPLICITPROVISIONSOMESTRUCTUREATPLACEOFDISSIMILARITYUNDERTHECONDITIONALLOWEXISTENCECERTAINTHECRACKOFWIDTHBUTATUNDERCONSTRUCTIONSHOULDASFARASPOSSIBLEADOPTAVALIDMEASURECONTROLCRACKCREATION,MAKETHESTRUCTUREDONTAPPEARCRACKPOSSIBLYORASFARASPOSSIBLEDECREASECRACKOFAMOUNTANDWIDTH,PARTICULARLYWANTTOASFARASPOSSIBLEAVOIDHARMFULCRACKOFEMERGENCE,INSUREENGINEERINGQUALITYTHUSCONCRETECRACKCREATIONOFTHEREASONBEALOTOFANDHAVEALREADYTRANSFORMEDTOCAUSEOFCRACKSUCHASTEMPERATUREVARIETY,CONSTRINGENCY,INFLATION,THEASYMMETRYSINKTOSINKETCREASONCAUSEOFCRACKHAVEOUTSIDECARRYTHECRACKTHATTHEFUNCTIONCAUSEPROTECTEDENVIRONMENTNOTAPPROPRIATETHECRACKETCCAUSEDWITHCHEMICALEFFECTWANTDIFFERENTIATIONTOTREATINTHEACTUALENGINEERING,WORKOUTAPROBLEMACCORDINGTOTHEACTUALCIRCUMSTANCEINTHECONCRETEENGINEERINGTHEFAMILIARCRACKANDTHEPREVENTION1STEMSUOCRACKANDPREVENTIONSTEMTHESUOCRACKMUCHAPPEARAFTERTHECONCRETEPROTECTBEOVEROFAPERIODOFTIMEORCONCRETESPRINKLETOBUILDTOCOMPLETEBEHINDOFAROUNDAWEEKINTHECEMENTSYRUPHUMIDITYOFEVAPORATEWOULDCREATIONSTEMSUO,ANDTHISKINDOFCONSTRINGENCYISCANTNEGATIVESTEMSUOCRACKOFTHECREATIONBEMAINISBECAUSEOFCONCRETEINSIDEOUTSIDEHUMIDITYEVAPORATEDEGREEDISSIMILARITYBUTCAUSETOTRANSFORMDISSIMILARITYOFRESULTTHECONCRETEISSUBJECTEDTOEXTERIORCONDITIONOFINFLUENCE,SURFACEHUMIDITYLOSSLEADQUICK,TRANSFORMBIGGER,INNERPARTDEGREEOFHUMIDITYVARIETYSMALLERTRANSFORMSMALLER,BIGGERSURFACESTEMTHESUOTRANSFORMTOBESUBJECTEDTOCONCRETEINNERPARTCONTROL,CREATIONMOREBIGPULLSHOULDDINTBUTCREATIONCRACKTHERELATIVEHUMIDITYISMORELOW,CEMENTSYRUPBODYSTEMSUOMOREBIG,STEMTHESUOCRACKBEMOREEASYCREATIONSTEMTHESUOCRACKISMUCHSURFACEPARALLELLINESFORMORTHENETSHALLOWTHINCRACK,WIDTHMANYBETWEEN00502MM,THEFLATSURFACEPARTMUCHSEEINTHEBIGPHYSICALVOLUMECONCRETEANDFOLLOWITMOREINTHINNERBEAMPLANKSHORTTODISTRIBUTESTEMSUOCRACKUSUALLYTHEANTISHENOFINFLUENCECONCRETE,CAUSETHEDURABLEOFTHERUSTECLIPSEINFLUENCECONCRETEOFREINFORCINGBAR,UNDERTHEFUNCTIONOFTHEWATERPRESSUREDINTWOULDCREATIONTHEWATERPOWERSPLITCRACKINFLUENCECONCRETEOFLOADINGDINTETCCONCRETESTEMTHESUOBEMAINWITHWATERASHOFTHECONCRETERATIO,THEDOSAGEOFTHECOMPOSITION,CEMENTOFCEMENT,GATHERTOANTICIPATEOFTHEDOSAGEOFTHEPROPERTYANDDOSAGE,INADDITIONETCRELEVANTMAINPREVENTIONMEASUREWHILEBEINGTOCHOOSETOUSETHECONSTRINGENCYQUANTITYSMALLERCEMENT,GENERALLOWHOTWATERMIREANDPOWDERASHFROMSTOVECEMENTINTHEADOPTION,LOWERTHEDOSAGEOFCEMENTTWOISACONCRETEOFSTEMTHESUOBESUBJECTEDTOWATERASHRATIOOFINFLUENCEMOREBIG,WATERASHRATIOMOREBIG,STEMSUOMOREBIG,SOINTHECONCRETEMATCHTHERATIOTHEDESIGNSHOULDASFARASPOSSIBLECONTROLGOODWATERASHRATIOOFCHOOSETOUSE,THECHANADDINTHEMEANTIMEACCOMMODATIONOFREDUCEWATERTHREEISSTRICTCONTROLCONCRETEMIXBLENDWITHUNDERCONSTRUCTIONOFMATCHRATIO,USEOFCONCRETEWATERQUANTITYABSOLUTECANTBIGINMATCHRATIODESIGNGIVESETTLEOFUSEWATERQUANTITYFOURISTHEEARLIERPERIODWHICHSTRENGTHENCONCRETETOPROTECT,ANDAPPROPRIATEEXTENSIONPROTECTOFCONCRETETIMEWINTERCONSTRUCTIONWANTTOBEAPPROPRIATEEXTENSIONCONCRETEHEATPRESERVATIONTOOVERLAYTIME,ANDTU2SHUAPROTECTTOPROTECTFIVEISACONSTITUTIONTHEACCOMMODATIONISINTHECONCRETESTRUCTUREOFTHECONSTRINGENCYSEW2THESUCONSTRINGENCYCRACKANDPREVENTIONSUCONSTRINGENCYISTHECONCRETEISBEFORECONDENSE,SURFACEBECAUSEOFLOSEWATERQUICKERBUTCREATIONOFCONSTRINGENCYTHESUCONSTRINGENCYCRACKISGENERALATDRYHEATORSTRONGWINDTHEWEATHERAPPEAR,CRACKSMUCHPRESENTINGINTHECENTERBREADTH,BOTHENDSBEINTHECENTERTHINANDTHELENGTHBEDIFFERENT,WITHEACHOTHERNOTCOHERENTAPPEARANCESHORTERCRACKGENERALLONG2030CM,THELONGERCRACKCANREACHTOA23M,BREADTH15MMITCREATIONOFMAINREASONISTHECONCRETEISEVENTUALLYALMOSTHAVINGNOSTRENGTHORSTRENGTHBEFORETHENINGVERYSMALL,PERHAPSCONCRETEJUSTEVENTUALLYNINGBUTSTRENGTHVERYHOUR,BESUBJECTEDTOHEATORCOMPARESTRONGWINDDINTOFINFLUENCE,THECONCRETESURFACELOSEWATERTOLEADQUICK,RESULTININTHECAPILLARYCREATIONBIGGERNEGATIVEPRESSBUTMAKEACONCRETEPHYSICALVOLUMESHARPLYCONSTRINGENCY,BUTATTHISTIMETHESTRENGTHOFCONCRETEAGAINCANTRESISTITSCONSTRINGENCY,THEREFORECREATIONCRACKEDTHEINFLUENCECONCRETESUCONSTRINGENCYOPENTHEMAINFACTOROFCRACKTOHAVEWATERASHRATIO,CONCRETEOFCONDENSETIME,ENVIRONMENTTEMPERATURE,WINDVELOCITY,RELATIVEHUMIDITYETCMAINPREVENTIONMEASUREONEISCHOOSETOUSESTEMTHESUOVALUESMALLERHIGHERHUOSOURSALTOFTHEEARLIERPERIODSTRENGTHORCOMMONTHEHUOSOURBRINEMIRETWOISSTRICTTHECONTROLWATERASHRATIO,THECHANADDTOEFFICIENTLYREDUCEWATERTOINCREMENTTHECOLLAPSEOFCONCRETEFALLADEGREEANDWITHEASY,DECREASECEMENTANDWATEROFDOSAGETHREEISTOSPRINKLEBEFOREBUILDINGCONCRETE,WATERBASICLEVELANDTEMPLATEEVENTOSOAKTHROUGHFOURISINTIMETOOVERLAYTHEPERHAPSDAMPGRASSMATOFTHEPLASTICSTHINFILM,HEMPSLICEETC,KEEPCONCRETEEVENTUALLYBEFORETHENINGSURFACEISMOIST,PERHAPSSPRAYTOPROTECTETCTOCARRYONPROTECTINTHECONCRETESURFACEFIVEISINTHEHEATANDSTRONGWINDTHEWEATHERTOWANTTOESTABLISHTOHIDESUNANDBLOCKBREEZEFACILITIES,PROTECTINTIME3SINKTOSINKCRACKANDPREVENTIONTHECREATIONWHICHSINKTOSINKCRACKISBECAUSEOFTHESTRUCTUREFOUNDATIONSOILQUALITYNOTANDEVENLY,LOOSESOFTORRETURNTOFILLSOILDISHONESTORSOAKINWATERBUTRESULTINTHEASYMMETRYSINKTODECLINEWITHTHERESULTTHATPERHAPSBECAUSEOFTEMPLATEJUSTDEGREESHORTAGE,THETEMPLATEPROPPEDUPTOONCEBEAPARTFROMBIGORPROPUPBOTTOMLOOSEMOVEETCTOCAUSE,ESPECIALLYATWINTER,THETEMPLATEPROPUPATJELLYSOILUP,JELLYTHESOILTURNJELLYEMPRESSCREATIONASYMMETRYTOSINKTODECLINEANDCAUSECONCRETESTRUCTURECREATIONCRACKTHISKINDCRACKMANYISDEEPENTERORPIERCETHROUGHSEXCRACK,ITALIGNMENTHAVESOMETHINGTODOWITHSINKINGTOSINKACIRCUMSTANCE,GENERALFOLLOWWITHGROUNDPERPENDICULARORPRESENT30S45CAPEDIRECTIONDEVELOPMENT,BIGGERSINKTOSINKCRACK,USUALLYHAVECERTAINOFWRONG,CRACKWIDTHUSUALLYWITHSINKTODECLINEQUANTITYDIRECTPROPORTIONRELATIONCRACKWIDTHUNDERTHEINFLUENCEOFTEMPERATUREVARIETYSMALLERTHEFOUNDATIONAFTERTRANSFORMSTABILITYSINKTOSINKCRACKALSOBASICTENDINSTABILITYMAINPREVENTIONMEASUREONEISRIGHTNESSLOOSESOFTSOIL,RETURNTOFILLSOILFOUNDATIONACONSTRUCTIONATTHEUPPERPARTSTRUCTUREFRONTSHOULDCARRYONNECESSITYOFHANGSOLIDWITHREINFORCETWOISTHESTRENGTHTHATASSURANCETEMPLATEISENOUGHANDJUSTDEGREE,ANDPROPUPFIRM,ANDMAKETHEFOUNDATIONBESUBJECTEDTODINTEVENTHREEISKEEPCONCRETEFROMSPRINKLEINFUSINGTHEFOUNDATIONINTHEPROCESSISSOAKBYWATERFOURISTIMETHATTEMPLATETOREDOWNTOCANTBETOOEARLY,ANDWANTTONOTICETODISMANTLEAMOLDORDEROFSEQUENCEFIVEISATJELLYSOILTOPTAKETOESTABLISHTEMPLATETONOTICETOADOPTCERTAINOFPREVENTIONMEASURE4TEMPERATURECRACKANDPREVENTIONTEMPERATURECRACKMUCHTHEOCCURRENCEISINBIGSURFACEORDIFFERENCEINTEMPERATUREVARIETYOFTHEPHYSICALVOLUMECONCRETECOMPARETHEEARTHAREAOFTHECONCRETESTRUCTURECONCRETEAFTERSPRINKLINGTOBUILD,INTHEHARDENINGTHEPROCESS,CEMENTWATERTURNACREATIONAGREATDEALOFOFWATERTURNHOT,BETHECEMENTDOSAGEISINTHE350550KG/M3,EACHSIGNSQUARETHERICECONCRETEWILLRELEASEACALORIESOF1750027500KJANDMAKECONCRETEINTERNALTHUSTHETEMPERATURERISETOREACHTO70ORSOEVENHIGHERBECAUSETHEPHYSICALVOLUMEOFCONCRETEBEMOREBIG,AGREATDEALOFOFWATERTURNHOTACCUMULATEATTHECONCRETEINNERPARTBUTNOTEASYSENDFORTH,CAUSEINNERPARTTHETEMPERATUREHOICK,BUTTHECONCRETESURFACESPREADHOTMOREQUICK,SOFORMATIONINSIDEOUTSIDEOFBIGGERDIFFERENCEINTEMPERATURE,THEBIGGERDIFFERENCEINTEMPERATURERESULTININNERPARTANDEXTERIORHOTTHEDEGREEOFTHEBULGECOLDSUODISSIMILARITY,MAKECONCRETESURFACECREATIONCERTAINOFPULLSHOULDDINTWHENPULLSHOULDDINTEXCEEDTHEANTIOFCONCRETEPULLSTRENGTHEXTREMELIMIT,CONCRETESURFACEMEETINGCREATIONCRACK,THISKINDOFCRACKMUCHOCCURRENCEAFTERTHECONCRETEUNDERCONSTRUCTIONPERIODINTHECONCRETEOFUNDERCONSTRUCTIONBEDIFFERENCEINTEMPERATUREVARIETYMOREBIG,PERHAPSISACONCRETETOBESUBJECTEDTOASSAULTOFCOLDWAVEETC,WILLCAUSECONCRETESURFACETHETEMPERATURESHARPLYDESCEND,BUTCREATIONCONSTRINGENCY,SURFACECONSTRINGENCYOFTHECONCRETEBESUBJECTEDTOINNERPARTCONCRETEOFCONTROL,CREATIONVERYBIGOFPULLSHOULDDINTBUTCREATIONCRACK,THISKINDOFCRACKUSUALLYJUSTINMORESHALLOWSCOPEOFTHECONCRETESURFACECREATIONTHEALIGNMENTOFTHETEMPERATURECRACKUSUALLYNONESETTLEREGULATION,BIGAREASTRUCTURETHECRACKOFTENMANEUVERINTERLEAVETHESIZEBIGGERSTRUCTUREOFTHEBEAMPLANKLENGTH,THECRACKRUNPARALLELWITHSHORTSIDEMORETHOROUGHWITHPIERCETHROUGHSEXOFTEMPERATURECRACKGENERALANDSHORTSIDEDIRECTIONPARALLELISMORCLOSEPARALLELISM,CRACKALONGLONGSIDECENTTHESEGMENTAPPEAR,INTHECENTERMOREAIRTIGHTCRACKWIDTHTHESIZEBEDIFFERENT,BESUBJECTEDTOTEMPERATUREVARIETYINFLUENCEMOREOBVIOUS,WINTERCOMPAREBREADTH,SUMMERMORENA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WMETHODINFUSEASYRUPMETHODMAINTHECONCRETECRACKBEENAPPLICABLETOHAVEINFLUENCEORHAVEALREADYDEFENDSHENREQUESTTOTHESTRUCTUREWHOLEOFREPAIR,ITISMAKEUSEOFPRESSUREEQUIPMENTSGUMKNOTTHEMATERIALPRESSINTOTHECRACKOFCONCRETE,GUMKNOTTHEMATERIALHARDENBEHINDANDCONCRETEFORMATIONONEBEWHOLE,THUSREINFORCEOFPURPOSETHEINCOMMONUSEGUMKNOTMATERIALHASTHECEMENTTHESYRUP,EPOXY,AJICXISOURESTERANDGATHERAMMONIAESTERTOEQUALIZETOLEARNMATERIALTHEQIANSEWAMETHODISTHATTHECRACKBEAKINDOFMOSTINCOMMONUSEMETHODIN,ITUSUALLYISFOLLOWTHECRACKDIGSLOT,THEQIANFILLSUINTHESLOTORRIGIDWATERMATERIALWITHATTAINCLOSINGCRACKOFPURPOSETHEINCOMMONUSESUMATERIALHASPVCGUMMIRE,PLASTICSOINTMENT,THEDJIRUBBERETCINCOMMONUSERIGIDWATERMATERIALISTHEPOLYMERCEMENTSANDSYRUP2,THESTRUCTUREREINFORCEAMETHODWHENTHECRACKINFLUENCEARRIVECONCRETESTRUCTUREOFFUNCTION,WILLCONSIDERATIONADOPTTOREINFORCEAMETHODTOCARRYONPROCESSINGTOTHECONCRETESTRUCTURETHESTRUCTUREREINFORCEMEDIUMINCOMMONUSEMAINHAVETHEFOLLOWINGAFEWMETHODTHEPIECEOFENLARGEMENTCONCRETESTRUCTUREINEVERYASPECTACCUMULATE,OUTSIDETHECAPEDEPARTMENTOFTHEGOUPIECEPACKTYPESTEEL,ADOPTIONPREPARESHOULDTHEDINTMETHODREINFORCE,GLUETOSTICKSTEELPLATETOREINFORCE,INCREASETOESTABLISHFULCRUMTOREINFORCEANDJETTHECONCRETECOMPENSATIONREINFORCE3,CONCRETEDISPLACEMENTMETHODCONCRETEDISPLACEMENTMETHODISPROCESSINGSEVERITYDAMAGECONCRETEOFAKINDOFVALIDMETHOD,THISMETHODBEFIRSTWILLDAMAGEOFTHECONCRETEPICKANDGETRIDOF,THENAGAINDISPLACEMENTGOINTONEWOFCONCRETEOROTHERMATERIALTHEINCOMMONUSEDISPLACEMENTMATERIALHAVECOMMONCONCRETEORTHECEMENTSANDSYRUP,POLYMERORCHANGESEXPOLYMERCONCRETEORSANDSYRUP4,THEELECTRICITYCHEMISTRYPROTECTIONMETHODTHEELECTRICITYCHEMISTRYANTISEPSISISTOMAKEUSEOFINFLICTIONELECTRICFIELDINLIETHEQUALITYOFELECTRICITYCHEMICALEFFECT,CHANGECONCRETEORREINFORCEDCONCRETETHEENVIRONMENTAPPEARANCEOFTHEPLACE,THEBLUNTNESSTURNREINFORCINGBARTOATTAINTHEPURPOSEOFANTISEPSISCATHODEPROTECTIONMETHOD,CHLORINESALTSWITHDRAWINGAMETHOD,ALKALESCENCETORECOVERAMETHODISACHEMISTRYPROTECTIONMETHODINTHREEKINDSOFINCOMMONUSEBUTVALIDMETHODTHEADVANTAGEOFTHISKINDOFMETHODISAPROTECTIONMETHODUNDERTHEINFLUENCEOFENVIRONMENTFACTORSMALLER,APPLYREINFORCINGBAR,CONCRETEOFLONGTERMANTISEPSIS,SINCECANUSEDFORCRACKSTRUCTUREALREADYCANALSOUSEDFORNEWSETUPSTRUCTURE5,IMITATETOLIVINGFROMLEGALMOREIMITATETOLIVINGFROMHEALTHEMETHODBEAKINDOFNEWCRACKTREATMENT,ITSMIMICRYLIVINGCREATUREORGANIZATIONSECRETEACERTAINMATERIALTOWARDSSUFFERINGWOUNDPARTAUTO,BUTMAKETHEWOUNDPARTHEALOFFUNCTION,JOINSOMEANDSPECIALCOMPOSITIONSUCHASCONTAINTOGLUEKNOTOFTHELIQUIDXINFIBERORCAPSULEINTHECONCRETEOFTHETRADITIONTHECOMPOSITION,ATCONCRETEINNERPARTFORMATIONTHEINTELLIGENCETYPEIMITATETOLIVINGFROMHEALNERVENETWORKSYSTEM,BETHECONCRETEAPPEARCRACKSECRETEAPARTSOFLIQUIDXINFIBERCANMAKETHECRACKREHEALCONCLUSIONTHECRACKISWIDESPREADINTHECONCRETESTRUCTUREEXISTENCEOFAKINDOFPHENOMENON,ITOFEMERGENCENOTONLYWILLLOWERTHEANTISHENOFBUILDINGABILITY,INFLUENCEBUILDINGOFUSAGEFUNCTION,ANDWILLCAUSETHERUSTECLIPSEOFREINFORCINGBAR,THECARBONIZATIONOFCONCRETE,LOWERTHEDURABLEOFMATERIAL,INFLUENCEBUILDINGOFLOADINGABILITY,SOWA

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