SYMPOSIUMONEFFECTOFWATER-REDUCINGADMIXTURESANDSET-RETARDINGADMIXTURESONPROPERTIESOFCONCRETEPresentedattheTHIRDPACIFICAREANATIONALMEETINGAMERICANSOCIETYFORTESTINGMATERIALSSanFrancisco,Calif.,October14,I959OReg.U.S.Pat.Off.ASTMSpecialTechnicalPublicationNo.z66Price87.50;toMembers$6.00PublishedbytheAMERICANSOCIETYFORTESTINGMATERIALSI916RaceSt.,Philadelphia3,Pa.©BYA~R~c~,~SOCIETYFORTEsT~OMATEm~a.S1960LibraryofCongressCatalogCardNumber:60-9520PrintedinBaltimore,Md.June196oFOREWORDTheuseofwater-reducingadmixturesandsetretardersinconcretehasgrowncontinuouslysincetheirintroductionover25yearsago,withapresentestimatedusageintheproductionof25millioncubicyardsofconcreteannuallyintheUnitedStatesalone.FurtherindicationofcurrentinterestisevidencedbythefactthatASTMCommitteeC-9onConcreteandCon-creteAggregatesandcertainpublicagenciesareactivelydraftingstandardmethodsoftestandspecificationstogovernthepurchaseandperformancerequirementsoftheseadmixturesforconcrete.Thefutureofbetterconcreteliesinanincreasedunderstandingofcon-cretingmaterialsandthebestmannerofcombiningthemtoproducethemaximuminstrengthanddurability.ItiswiththisinmindthatCommitteeC-1onCementandCommitteeC-9havejointlysponsoredthisSymposium,heldduringtheThirdPacificAreaNationalMeetingoftheSocietyfromOctober11-16,1959,inSanFrancisco,Calif.TheSymposiumconsistedoftenpapersandasummary.Itisofinteresttonotethatfourofthepapersrepresentthejointcontributionoffourprincipalproducersofadmixtures.Theremainingpaperswerepreparedbyrepre-sentativesofconsumerinterests,researchorganizations~andthecementindustry.TheSymposiumwasheldduringtwosessionsonWednesday,October14.ProfessorsR.E.DavisandMilosPolivka,bothoftheUniversityofCali-fornia,presidedoverthetwosessionsrespectively.TheJointSymposiumCommittee,representingCommitteesC-1andC-9,includedthefollowingmembers:R.E.DAVIS,UniversityofCalifornia(Chairman)W.C.HANNA,CaliforniaPortlandCementCo.(Vice-Chairman)MILOSPOLIVKA,UniversityofCalifornia(Secretary)R.L.BLAINE,NationalBureauofStandardsJosEPHE.G...
