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1、ReadyMixedConcreteearlyCrackandpreventionmeasures商品混凝土早期裂缝的成因及防治措施学生姓名：王昀学生班级：土木0648班所在学院：土木学院所学专业：土木工程专业方向：建筑工程指导教师：袁志仁老师教师职称：讲师土木学院2010年4月15日7ReadyMixedConcreteCrackandearlypreventionmeasuresAbstract:Thispaperontheengineeringpracticepronetoearlyfractur
2、eanalysisanddescription,butalsointroducedanumberoftargetedpreventionandcontrolmeasuresWiththecontinuousexpansionofthescaleofconstructionandqualityofconstructionworkstoraiseawarenessoftheimportanceofcommoditiesforitsconcretetechnicalandeconomicadvantages,
3、inparticular,isstable,reliable,goodqualityfavoredbyconstructionunits.However,theuseofcommercialconcreteconstructionqualityofworksisalsoalotofaccidents,themostcommonproblemwhenthenumberofcracks,inparticularthecoefficientofthesurfaceplate,massconcretewalls
4、,aswellasundesirable,suchasconstructiontechnologyofconcretecrackscausedbytheproblemresultinginalotofunnecessarydisputes,somecracksintheearlymorning,ifdealtwithearlydetection,thenthestructurewillnotaffecttheappearanceanduse.Concreteisasolid,liquid,gas,aco
5、mbinationofnon-homogeneouscompositematerial,afterformingasthetemperature,humidityandotherenvironmentalconditionswillbeformedundertheinfluenceofthenakedeyecannotseethemicro-cracksintheconcretecompositionofmaterialsandmicro-differentstructuresaswellastheen
6、vironmentalimpactofdifferentcausesofthecracksintheconcretehaveaverycomplicatedandonlyworksinthisarticletheauthorencounteredintheactualsituationontheearlycracksinthepreventionofthecausesandalittlenote.1,aggregateconcretecrackscausedbyplasticsettingWhenint
7、hepouringofconcrete,duetovibrationandgravitytheroleofrods,sinkingaggregate,cementincreased,untilthisfallwhenthesidetostoptheconcretetoharden,whensuchafallbytheplastictemplate,steelandembeddedpartsofinhibition(subsidenceoratemplate,move)thecrackswillappea
8、r,whichcracksappearinmostofhalfanhourafterpouringconcreteto3hours,stillintheplasticstateofconcrete,concrete7surfacewhentheimmediatedisappearanceofShuiguangalongthebeamsandplatesreinforcedthedirectionoftheaboveoccur,mainlyS
