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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,ANDTU2SHUAPROTECTTOPROTECTFIVEISACONSTITUTIONTHEACCOMMODATIONISINTHECONCRETESTRUCTUREOFTHECO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