混凝土早期断裂力学行为

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1、REPORTBE96-3843/2001:36-2FractureMechanicsBehaviourofConcreteatEarlyAgeKarimHariri11InstitutfürBaustoffe,MassivbauundBrandschutz,TechnischeUniversitätBraunschweigPublishedbyDepartmentofCivil&MiningEngineeringDivisionofStructuralEngineeringISBN91-89580–36–2•2001:36-2•SEoRe

2、portN:FractureMechanicsBehaviourofConcreteat2001:36-2IPACSEarlyAgeImprovedProductionofAdvancedConcreteStructures11AuthorKarimHaririk.hariri@tu-bs.de1AddressIBMB,TUBraunschweig,Germany2Author2Address3Author3Address4Author4AddressoTask/Subtaskn:T3.3/T6.3.1and6.3.2BriteEuRam

3、ContractNo.BRPR-CT97-0437oProjectn:BriteEuRamProposalNo.BE96-3843Projecttitle:IPACS-IMPROVEDPRODUCTIONOFADVANCEDCONCRETESTRUCTURESProjectco-BetongindustriAB,DrMatsEmborgordinator:Partners:BetongindustriABCementaABSelmerASATechnicalUniversityofDelftENELTechnicalUinversityo

4、fLuleåNCCABSkanskaTeknikABTechnicalUniversityofBraunschweigIsmesNorwegianPublicRoadsDirectorateElkemASNorcemASTechnicalUniversityofTrondheimProjectfundedbytheEuropeanCommunityundertheIndustrial&MaterialsTechnologiesProgramme(Brite-EuRamIII)IMPROVEDPRODUCTIONOFADVANCEDCONC

5、RETESTRUCTURES-IPACSBackgroundResearchandpracticalexperienceshowthatthequalityandlifetimeofconcretestructureslargelydependonthecuringconditionsintheconcrete'searlylife,asinadequatecuringleadstomalfunctionandcracking.Amajorsourceofdeleteriouscrackingalreadyintheconstructio

6、nstageistheoccurrenceofstressesinthehardeningconcreteduetorestrainedvolumechangerelatedtohydrationtemperaturesandshrinkagephenomena.Itisthusofutmostimportance,especiallyregardingnewhighperformanceconcrete,thattheproperexecutionconditionsaremaintainedthroughouttheconstruct

7、ionperiodbyavoidingtheprematurecracking.ObjectiveofprojectMaingoalofIPACSistoevaluate,integrateandextendtheexistingknowledgeaboutearlyageconcretecrackpredictioninengineeringpracticeyieldingthefollowingbenefits:•Contractorsanddesignerswillhavenewandmorereliableengineeringi

8、nstrumentsenablingthemtopredictandtooptimisethetechnicaleffectandcostofalternativedesignsandexec