美国ACI-211砼配比设计

StandardPracticeforSelectingProportionsforNormalHeavyweight,andMassConcrete(ACI211.1-91)Reapproved1997ReportedbyACICommittee211DonaldE.Dixon,ChairmanJackR.Prestrera,SecretaryGeorgeR.U.Burg,*Chairman,SubcommitteeAEdwardA.Abdun-Nur*StanleyG.BartonLeonardW.Bell*StanleyJ.Blas,Jr.RamonLCarraquilloPeggyM.CarraquilloAlanC.CarterMartynT.ConreyJamesE.CookRusselA.Cook*WilliamA.CordonWayneJ.CostaEdwardA.Abdun-NurtWilliamLBarringer-tStanleyG.BartonLeonardW.Bell?JamesE.Bennett,Jr.J.FloydBestRamonLCarrasquilloJamesE.Cook-tRussellA.CookDavidA.CrockerKennethW.DayCalvinLDodlThomasA.FoxDonaldA.GrahamGeorgeW.HollonWilliamW.Hotaling,Jr.RobertS.JenkinsPaulKliegerFrankJ.LahmStanleyH.LeeGaryR.Mass*MarkA.MearingRichardC.Meininger’RichardW.NarvaLeoP.NicholsonJamesE.OliversonJamesS.PierceSandorPopovics*StevenA.RaganHarryC.RobinsonJereH.Rose*JamesA.ScherocmanJamesM.Shilstone*[e-mail],SubcommitteeADavidA.CrockerLuisH.DiazDonaldE..DixontCalvinLDodlThomasA.FoxGeorgeW.HollonTarifM.JaberStephenM.LaneStanleyH.LeeRichardC.MeiningertJamesE.OliversonJamesS.PierceSandorPopovicsStevenA.RaganJereH.RogetDonaldLSchlegelJamesM.Shilstone,Sr.PaulR.StodolaWilliamS.SypherAvaSxypulaJimmieL.‘ThompsontStanleyJ.VirgalitteWoodwardLVogtJackW.WeberDeanJ.White,IIIMarshallS.WilliamsJohnR.WilsonDescribes,withexamples,twomethodsforselectingandadjustingproportionsfornormalweightconcrete,bothwithandwithoutchemicaladmixturespoz-zolanic,andslagmaterials.Onemethodisbasedonanestimatedweightoftheconcreteperunitvolume;theotherisbasedoncalculationsoftheabsolutevolumeoccupiedbytheconcreteingredients.Theprocedurestakeintoconsid-eerationtherequirementsforplaceability,consistency,strength,anddurability.Examplecalculationsareshownforbothmethods,includingadjustmentsbasedonthecheracteristicsofthefirsttrialbatch.Theproportioningofheavyweightconcreteforsuchpurposesasradiationshieldingandbridgecounterweightstructuresisdescribedinanappendix.Thisappendixusestheabsolutevolumemethod,whichisgenerallyacceptedandismoreconvenientforheavyweightconcrete.Thereisalsoanappendixthatprovidesinformationontheproportioningofmassconcrete.Theabsolutevolumemethodisusedbecauseofitsgeneralacceptance.Keywords:absorption;admixtures;aggregates;blast-furnaceslag;cementitiousmaterials;concretedurability;concretes;consistency;durability;exposure;fineaggregates:flyash;heavyweightaggregates;heavyweightconcretes;massconcrete;mixproportioning;pozzolans;qualitycontrol;radiationshielding;silicafume;slumptests;volume;water-cementratio;water-cementitiousratio;workability.ACICommitteeReports,Guides,StandardPractices,andCommentariesareintendedforguidanceindesigning,planning,executing,orinspectingconstructionandinpreparingspecifications.ReferencetothesedocumentsshallnotbemadeintheProjectDocuments.IfitemsfoundinthesedocumentsaredesiredtobepartoftheProjectDocumentstheyshouldbephrasedinmandatory’languageandincorporatedintotheProjectDocuments.GeorgeB.SouthworthAlfredB.SpamerPaulR.StodolaMichaelA.TaylorStanelyJ.VigalitteWilliamH.VoelkerJackW.Weber*DeanJ.WhiteIIMiltonH.Willis,Jr.FrancisC.WilsonRobertYuanCONTENTSChapter1-Scope,p.211.1-2Chapter2-Introduction,p.211.1-2Chapter3-Basicrelationship,p.211.1-2Chapter4-Effectsofchemicaladmixtures,pozzolanic,andothermaterialsonconcreteproportlons,p.211.1-4lMembersofSubcommitteeAwhopreparedthisstandard.ThecommitteeacknowledgesthesignificantcontributionofWilliamL.Barringertotheworkofthesubcommittee.tMembersofSubcommitteeAwhopreparedthe1991revision.ThisstandardsupersedesACI211.1-89.ItwasrevisedbytheExpeditedStandardizationprocedure,effectiveNov.1,1991.Thisrevisionincorporatesprovisionsrelatedtotheuseofthemineraladmixturesilicafumeinconcrete.Chapter4hasbeenexpandedtocoverindetailtheeffectsoftheuseofsilicafumeontheproportionsofconcretemixtures.EditorialchangeshavealsobeenmadeinChapters2through4,andChapters6through8.Copyright01991,AmericanConcreteInstitute.Allrightsreservedincludingrightsofreproductionanduseinanyformorbyanymeans,includingthemakingofcopiesbyanyphotoprocess,orbyanyelectronicormechanicaldevice,printed,written,ororal,orrecordingforsoundorvisualreproductionorforuseinanyknowledgeorretrievalsystemordevice,unlesspermissioninwritingisobtainedfromthecopyrightproprietors.211.1-l211.1-2ACICOMMITTEEREPORTChapter5-Backgrounddata,p.211.1-7Chapter6-Procedure,p.211.1-7Chapter7-Samplecomputations,p.211.1-13Chapter8-References,p.211.1-18Appendix1-MetricsystemadaptationAppendix2-ExampleprobleminmetricsystemAppendix3-LaboratorytestsAppendix4-HeavyweightconcretemixproportioningAppendix5-MassconcretemixproportioningCHAPTER1-SCOPE1.1ThisStandardPracticedescribesmethodsforselectingproportionsforhydrauliccementconcretemadewithandwithoutothercementitiousmaterialsandchemicaladmixtures.Thisconcreteconsistsofnormaland/orhigh-densityaggregates(asdistinguishedfromlightweightaggregates)withaworkabilitysuitableforusualcast-in-placeconstruction(asdistinguishedfromspecialmixturesforconcreteproductsmanufacture).Alsoincludedisadescrip-tionofmethod