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1、混凝土楼板开裂原因及处理方法（Concretefloorcrackingcausesandtreatmentmethods）ConcretefloorcrackingcausesandtreatmentmethodsResidentialprojectscurrentlyfilledconcretefloorandwallcracksaremorecommon,accordingtotherelevantmaterialsandcombiningthesituationofmycompany,analysisofthecausesandCountermeasuresofcast-in-p
2、laceconcretefloorandmasonrywallcracksareasfollows,forreferenceinthework.First,theresidentialcast-in-placeconcretefloorcracktype1.longitudinalcracks:cracksalongthelongitudinaldirectionofthebuilding,thereareintheleather,downthroughtheindividual.2.:thetransversecracksinthespanrangeof1/3,thecracksalo
3、ngthebuildingtransversedirection,thereareintheleather,downthroughtheindividual.3.cornercracks:obliquecracksinthefourcornersoftheroom,mostlyintheplateepithelium.4.irregularcracks:irregularcracksindistributionandstrike.5.transversecracksintherootofthefloor:cracksfromthesupportinthe30cm,locatedinthe
4、plateepithelium.6.cracksalongthedirectionoftheburiedwiretube.Two,thereasonsforcracksinthefloor1.designaspects1.1whenthedesignstructure,thesafetyreserveissmall,thereinforcementisinsufficientorthesectionissmall,therigidityofthebeamandplateispoorafterforming,theoveralldeflectionislarger,causingthefo
5、urcornercrackoftheplate.1.2,thedesignplatethicknessisnotenough,anddonotmakethedeflectioncheck,theoveralldeflectionisbigger,causetheplatefourcornercrack.1.3whenthebuildingislong,noexpansionjointissetup,andthecontractioncrackisproducedintheweaklink.(AmericanConcreteInstitutedatasuggestthatconcretes
6、hrinkageandtemperaturedeformationoftwokindsofdryshrinkagedeformationofeach30.48mabout19mm.shrinkagecausedbythechangeoftemperatureis37DEGC,thetemperaturechangeofeach30.48mcontractionorextensionof19mm.Somepeoplethinkthatthelongitudinalshrinkageof40mfloorsis8-20mm.duetohardeningandsolidification1.4t
7、heimproperdesignoffoundationcausesunevensettlement,whichcausesadditionalstressontheupperstructure,resultingincracksinthefloor.1.5,thefloortwo-wayforce,accordingtotheone-wayplatereinforcement,causingcracks.2.reasonsforc
