应用高强混凝土应注意的几个问题_缪昌文

201354210CONSTRUCTIONTECHNOLOGY1DOI10.7672/sgjs2013100001*211189、、。、。。TU528.31A1002-8498201310-0001-05IssuesforAttentionDuringtheApplicationofHighStrengthConcreteMiaoChangwenLiuJianzhongSchoolofMaterialsScienceandEngineeringSoutheastUniversityNanjingJiangsu211189ChinaAbstractHighstrengthconcreteiswidelyusedinmanydomesticandoverseaprojectsduetoitsadvantagessuchashighstrengthhighloadbearingcapacitylowenergyandresourceconsumptionandgooddurabilityetc．Howeverthedefectsoflargeviscositybadvolumestabilityhighbrittlenessstillexistintheconstructionofhighstrengthconcrete．Consideringthecharacteristicsofhighstrengthconcreteandcombiningcurrentresearchresultsthereasonsfortheproblemsareanalyzedaswellasthekeyinfluencefactors．Thecorrespondingmeasurestocontrolthedefectsareproposed．Keywordsconcretehighstrengthconcreteviscosityshrinkagetemperaturerisingbyhydrationbrittleness*[e-mail]2013-02-05、、、2060。、、20、、C50。19871990、19918。1988。1990C60。、、、、、100。。C60～C80。、。。11.1。242。1-3μc=μpragg+ts/ts1μcμpraggts。1。。。。1μp=μwrbinder+tw/tw2μwtwrbinder。2。。。1.2。4。3。、5。。、6-8。。9-11、、。。。2。。。。22.1《》C70C80500kg/m3600kg/m3。。。。《》0.236～0.412。13。14。2.2。2013No．103。。C3S、。、、。14。。、。。。15-16。C3SC3A1RT、C3SC3ACaOH2。1Fig．1Regulationeffectofmaterialsforhydrationheat33.117。。0.440%0.350%0.17100%。＜0.318-19。3.2。20。。。。。。21-22。“”。。。。2。。。。44.123-24①②、4422Fig．2Shrinkageeffectofadmixture、。。4.2、、、。25、2627-28。ACI544-2R—89、ASTMC1018、JSCEG552、RILEMTC162—TDF、CECS13∶2009、JGJ/T221—2010。29C60YusaSahin30Park31。、、。3。。、。3-Fig．3Curvesofbendingloadanddeflection5。。。、、。1TopcuIBKocataskinF．Atwo-phasecompositematerialsapproachtotheworkabilityofconcreteJ．CementandConcreteComposites1995174319-325．2TattersallGHBanfillPFG．TherheologyoffreshconcreteM．PitmanAdvancedPub．Program1983．3HuJ．AstudyofeffectofaggregateonconcreterheologyD．IowaIowaStateUniversity2005．4PapoAPianiL．EffectofvarioussuperplasticizersontherheologicalpropertiesofPortlandcementpastesJ．CementandConcreteResearch200434112097-2101．5LiuJZSunWMiaoCWetal．Influenceofsuperplasticizersandmineraladmixturesontheworkabilityofmortaratlowwater-cementratioC∥The2ndInternationalConferenceonMicrostructureRelatedDurabilityofCementitiousComposites．Amsterdam2012．6BoukendakdjiKenaiSRouisF．Effectofslagontherheologyoffreshself-compactedconcreteJ．ConstructionandBuildingMaterials20092372593-2598．2013No．1057LaskarTalukdarS．RheologicalbehaviorofhighperformanceconcretewithmineraladmixturesandtheirblendingJ．ConstructionandBuildingMaterials200822122345-2354．8FerrarisCFKarthikHORussellH．TheinfluenceofmineraladmixturesontherheologyofcementpasteandconcreteJ．CementandConcreteResearch2001312245-255．9KwanAKHWongHHC．EffectsofpackingdensityexcesswaterandsolidsurfaceareaonflowabilityofcementpasteJ．AdvancesinCementResearch20082011-11．10KwanAKHFungWWSWongHHC．Waterfilmthicknessflowabilityandrheologyofcement-sandmortarJ．AdvancesinCementResearch20102213-14．11FungWWSKwanAKH．RoleofwaterfilmthicknessinrheologyofCSFmortarJ．CementandConcreteComposites2010324255-264．12．M．1999．13ZhangYSSunWLiuSF．Studyonthehydrationheatofbinderpasteinhigh-performanceconcreteJ．CementandConcreteResearch2002321438-1448．14．J．2010132139-142168．15．J．2007356796-800．16．J．2012404613-619．17VictorYGLawrenceFKKimberlyEK．Short-termtensilecreepandshrinkageofultra-highperformanceconcreteJ．CementandConcreteComposites2009313147-152．18TamCMTambVWYNgKM．AssessingdryingshrinkageandwaterpermeabilityofreactivepowderconcreteproducedinHongKongJ．ConstructionandBuildingMaterials201226179-89．19AllenaSrinivasME．Ultra-highstrengthconcreteusinglocalmaterialsD．NewMexicoNewMexicoStateUniversity2010．20．J．2009393580-585．21AtcinPCNevilleAMAckerP．C∥5．2000．22．J．2008367901-911．23．D．2004．24．D．2004．25．C//．2001．26．J．200582150-153．27KhaledMzgürEelikT．Relationshipbetweenimpactenergyandcompressiontoughnessenergyofhigh-strengthfiber-reinforcedconcreteJ．MaterialsLetters2001474297-304．28．J．20036195-99．29．C60J．201233633-35．30爦ahinYKksalF．Theinfluencesofmatrixandsteelfibretensilestrengthsonthefractureenergyofhigh-strengthconcreteJ．ConstructionandBuildingMaterials20112541801-1806．31ParkSHKimDJRyuGS．TensilebehaviorofultrahighperformancehybridfiberreinforcedconcreteJ．CementandConcreteComposites2012342172-184．2013529810“”54“”。13335664m33。52—4、“”。“”333。“”、。289112.5m37．95m11．4m11.1m44000t47000t。8。33“”3100E1。20m。15001m2m＜50mm＜20mm。2．996%。1m、“”。