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1、ACI304.3R-96HeavyweightConcrete:Measuring,Mixing,Transporting,andPlacingReportedbyACICommittee304RobertA.Kelsey,RogerE.PharesJamesS.Pierce*ChairmanViceChairmanSubcommitteeChairmanDavidJ.Akers*ThomasA.JohnsonPaulE.ReinhartJamesE.Bennett,Jr.SamuelA.Kal
2、at*RoyceJ.RhoadsCasimirBognackiJohnC.KingKennethL.SaucierTianxiaCao*WilliamC.KrellDonaldL.SchlegelJamesL.CopeGaryR.MassPaulR.StodolaDanielGreenPatrickMcDowellWilliamX.SypherNeilR.GuptilDipakT.ParekhRobertE.TobinTerenceC.Holland*Membersofthesubcommitt
3、eewhopreparedrevisionstothereport.Presentsrecommendedmethodsandproceduresformeasuring,mixing,2.4—Admixturestransporting,andplacingheavyweightconcretesthatareusedprincipally2.5—Proprietarypremixedmortarforradiationshieldinginnuclearconstruction.Alsoco
4、veredarerecommen-dationsoncement,heavyweightaggregates,water,andadmixtures.Mixtureproportioningofheavyweightconcreteisdiscussed.RecommendationsforChapter3—Concretecharacteristics,p.304.3R-4preplaced-aggregateheavyweightconcretearealsoincluded,togethe
5、rwith3.1—Physicalpropertiessuitablegroutproportions.Mixingequipment,formconstruction,placing3.2—Mixtureproportioningprocedures,andmethodsofconsolidationaredescribed.Qualitycontrol,inspection,andtestingareemphasized,andalistofreferencesisincluded.Chap
6、ter4—Equipment,p.304.3R-5Keywords:admixtures;aggregates;barite;cements;concreteconstruction;Chapter5—Formwork,p.304.3R-5concretes;consolidation;constructionequipment;conveying;density(mass/volume);formwork(construction);grout;heavyweightaggregates;5.
7、1—Conventionalmethodheavyweightconcretes;ilmenite;limonite;magnetite;massconcrete;mate-5.2—Preplaced-aggregatemethodrialshandling;mixproportioning;mixing;placing;qualitycontrol;pre-placed-aggregateconcrete;radiationshielding;segregation.Chapter6—Plac
8、ement,p.304.3R-56.1—ConventionalmethodCONTENTS6.2—Preplaced-aggregatemethodChapter1—Generalconsiderations,p.304.3R-2Chapter7—Qualitycontrol,p.304.3R-67.1—SamplesandtestsChapter2—Materials,p.304.3R-22.1—Cement7.2—Cement2.2—Aggregate7.3—Aggregate2.3—Mi
