ASTM C232泌水实验

Designation:C232/C232M−09StandardTestMethodsforBleedingofConcrete1ThisstandardisissuedunderthefixeddesignationC232/C232M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope*1.1Thesetestmethodscoverthedeterminationoftherelativequantityofmixingwaterthatwillbleedfromasampleoffreshlymixedconcrete.Twotestmethods,thatdifferprimarilyinthedegreeofvibrationtowhichtheconcretesampleissubjected,areincluded.1.2Thetwotestmethodsarenotexpectedtoyieldthesametestresultswhensamplesofconcretefromthesamebatcharetestedbyeachmethod.Whenvariousconcretesaretobecompared,allthetestsmustbeconductedusingthesamemethod,andifthebatchesareofsimilarunitweight,thesamplemassesshallnotdifferbymorethan1kg[2lb].1.3ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.4Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.(Warning—Freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure).22.ReferencedDocuments2.1ASTMStandards:3C138/C138MTestMethodforDensity(UnitWeight),Yield,andAirContent(Gravimetric)ofConcreteC172PracticeforSamplingFreshlyMixedConcreteC192/C192MPracticeforMakingandCuringConcreteTestSpecimensintheLaboratoryC670PracticeforPreparingPrecisionandBiasStatementsforTestMethodsforConstructionMaterials3.SignificanceandUse3.1Thistestmethodprovidesprocedurestobeusedfordeterminingtheeffectofvariablesofcomposition,treatment,environment,orotherfactorsinthebleedingofconcrete.Itisalsopermittedtobeusedtodeterminetheconformanceofaproductortreatmentwitharequirementrelatingtoitseffectonbleedingofconcrete.3.2MethodA—Forasampleconsolidatedbyroddingonlyandtestedwithoutfurtherdisturbance,thussimulatingcondi-tionsinwhichtheconcrete,afterplacement,isnotsubjectedtointermittentvibration.3.3MethodB—Forasampleconsolidatedbyvibrationandtestedwithfurtherintermittentperiodsofvibration,thussimulatingconditionsinwhichconcrete,afterbeingplaced,issubjectedtointermittentvibration.TESTMETHODA—SAMPLECONSOLIDATEDBYTAMPING4.Apparatus4.1Container—Acylindricalcontainerofapproximately14-L[1⁄2-ft3]capacity,havinganinsidediameterof25565mm[1061⁄4in.]andaninsideheightof28065mm[1161ThesetestmethodsareunderthejurisdictionofASTMCommitteeC09onConcreteandConcreteAggregatesandarethedirectresponsibilityofSubcommitteeC09.60onTestingFreshConcrete.CurrenteditionapprovedJune1,2009.PublishedJuly2009.Originallyapprovedin1949.Lastpreviouseditionapprovedin2007asC232–07.DOI:10.1520/C0232_C0232M-09.2SectiononSafetyPrecautions,ManualofAggregateandConcreteTesting,AnnualBookofASTMStandards,Vol04.02.3ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.*ASummaryofChangessectionappearsattheendofthisstandardCopyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959.UnitedStates1CopyrightbyASTMInt'l(allrightsreserved);MonDec302:36:40EST2012Downloaded/printedbyBeijingUnivofTechpursuanttoLicenseAgreement.Nofurtherreproductionsauthorized.1⁄4in.].Thecontainershallbemadeofmetalhavingathicknessof2.67to3.40mm[0.105to0.134in.]andshallbeexternallyreinforcedaroundthetopwitha2.67to3.40mm[0.105to0.134in.]metalband,40mm[11⁄2in.]wide.Theinsideshallbesmoothandfreeofcorrosion,coatings,orlubricants.4.2Scale,ofsufficientcapacitytodeterminethemassoftheloadrequiredwithanaccuracyof0.5%.Balancesorscalesshallbecalibratedatleastannuallyorwheneverthereisreasontoquestiontheaccuracyoftheequipment.Equipmentnotinoperatingconditionoroutoftoleranceshallbemarkedassuchandtakenoutofserviceuntilcorrected.4.3Pipet,orsimilarinstrument,fordrawingofffreewaterfromthesurfaceofthetestspecimen.4.4GlassGraduate,100-mLcapacityforcollectingandmeasuringthequantityofwaterwithdrawn.4.5TampingRod—Around,straightsteelrod,16mm[5⁄8in.]indiameterandapproximately610mm[24in.]inlength,havingthetampingendroundedtoahemisphericaltip,thediameterofwhichis16mm[5⁄8in.].4.6Theapparatuslistedin4.7,4.8,and4.9arerequirediftheprocedureofmeasuringtheamountofbleedingwaterrecoveredisoneinvolvingweighing,evaporation,andre-weighing.4.7MetalBeaker(Optional)—A1000-mLmetalbeakerforcollectingthedecantedsu