Designation:C187–10
AmericanAssociationState
HighwayandTransportationOfficialsStandard
AASHTONo.:T129
StandardTestMethodfor
NormalConsistencyofHydraulicCement1ThisstandardisissuedunderthefixeddesignationC187;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.
1.Scope*
1.1Thistestmethodcoversthedeterminationofthenormalconsistencyofhydrauliccement.
1.2Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.
1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.See1.4foraspecificwarningstatement.
1.4Warning—Freshhydrauliccementitiousmixturesarecausticandmaycausechemicalburnstoskinandtissueuponprolongedexposure.Theuseofgloves,protectiveclothing,andeyeprotectionisrecommended.Washcontactareawithcopiousamountsofwateraftercontact.Washeyesforaminimumof15min.Avoidexposureofthebodytoclothingsaturatedwiththeliquidphaseoftheunhardenedmaterial.Removecontaminatedclothingimmediatelyafterexposure.22.ReferencedDocuments2.1ASTMStandards:3C305PracticeforMechanicalMixingofHydraulicCementPastesandMortarsofPlasticConsistency
C490PracticeforUseofApparatusfortheDeterminationofLengthChangeofHardenedCementPaste,Mortar,andConcrete
C511SpecificationforMixingRooms,MoistCabinets,MoistRooms,andWaterStorageTanksUsedintheTestingofHydraulicCementsandConcretes
C1005SpecificationforReferenceMassesandDevicesforDeterminingMassandVolumeforUseinthePhysical
ThistestmethodisunderthejurisdictionofASTMCommitteeC01onCementandisthedirectresponsibilityofSubcommitteeC01.22onWorkability.
CurrenteditionapprovedMay1,2010.PublishedJune2010.Originallyapprovedin1944.Lastpreviouseditionapprovedin2004asC187–04.DOI:10.1520/C0187-10.2SectiononSafety,ManualofCementTesting,AnnualBookofASTMStandards,Vol04.01.3ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.
1TestingofHydraulicCements
D1193SpecificationforReagentWater
E177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethods
3.SignificanceandUse
3.1Thistestmethodisintendedtobeusedtodeterminetheamountofwaterrequiredtopreparehydrauliccementpastesfortesting.
4.Apparatus
4.1ReferenceMassesandDevicesforDeterminingMass,conformingtotherequirementsofSpecificationC1005.Thedevicesfordeterminingmassshallbeevaluatedforprecisionandbiasatatotalloadof1000g.
4.2GlassGraduates,200or250-mLcapacity,andconform-ingtotherequirementsofPracticeC490.
4.3VicatApparatus—TheVicatapparatusshallconsistofaframeA(Fig.1)bearingamovablerodB,weighing300g,oneendC,theplungerend,being10mmindiameterforadistanceofatleast50mm,andtheotherendhavingaremovableneedleD,1mmindiameterand50mminlength.TherodBisreversible,andcanbeheldinanydesiredpositionbyasetscrewE,andhasanadjustableindicatorF,whichmovesoverascale(graduatedinmillimetres)attachedtotheframeA.ThepasteisheldinarigidconicalringG,restingonaplanenonabsorptivesquarebaseplateH,about100mmoneachside.TherodBshallbemadeofstainlesssteelhavingahardnessofnotlessthan35HRC(SeeNote1),andshallbestraightwiththeplungerendwhichisperpendiculartotherodaxis.Theringshallbemadeofanoncorroding,nonabsorbentmaterial,andshallhaveaninsidediameterof70mmatthebaseand60mmatthetop,andaheightof40mm.Inadditiontotheabove,theVicatapparatusshallconformtothefollowingrequirements:
Weightofmovablerod
DiameterofplungerendofrodDiameterofneedle
InsidediameterofringatbottomInsidediameterofringattopHeightofringGraduatedscale
30060.5g1060.05mm160.05mm7063mm6063mm4061mm
Thegraduatedscale,whencomparedwithastandardscaleaccuratetowithin0.1mmatallpoints,shallnotshowadeviationatanypointgreaterthan0.25mm.
*ASummaryofChangessectionappearsattheendofthisstandard.
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C187–10
pathofabout150mmfromonehandtoanothersoastoproduceanearlysphericalmassthatmaybeeasilyinsertedintotheVicatringwithaminimumamountofadditionalmanipu-lation.Presstheball,restinginthepalmofonehand,intothelargerendoftheconicalringG,Fig.1,heldintheotherhand,completelyfillingtheringwithpaste.Removetheexcessatthelargerendbyasinglemovementofthepalmofthehand.PlacetheringonitslargerendonthebaseplateH,andsliceofftheexcesspasteatthesmallerendatthetopoftheringbyasingleobliquestrokeofasharp-edgedtrowelheldataslightanglewiththetopofthering,andsmooththetop,ifnecessary,withafewlighttouchesofthepointedendofthetrowel.Duringtheseoperationsofcuttingandsmoothing,takecarenottocompressthepaste.
6.3ConsistencyDetermination—Centerthepasteconfinedinthering,restingontheplate,undertherodB,Fig.1,theplungerendCofwhichshallbebroughtincontactwiththesurfaceofthepaste,andtightentheset-screwE.ThensetthemovableindicatorFtotheupperzeromarkofthescale,ortakeaninitialreading,andreleasetherodimmediately.Thismustnotexceed30saftercompletionofmixing.Theapparatusshallbefreeofallvibrationsduringthetest.Thepasteshallbeofnormalconsistencywhentherodsettlestoapoint1061mmbelowtheoriginalsurfacein30safterbeingreleased.Maketrialpasteswithvaryingpercentagesofwateruntilthenormalconsistencyisobtained.Makeeachtrialwithfreshcement.7.Calculation
7.1Calculatetheamountofwaterrequiredfornormalconsistencytothenearest0.1%andreportittothenearest0.5%oftheweightofthedrycement.
8.PrecisionandBias
8.1Thesingleoperator-instrumentprecisionhasbeenfoundtobe0.25(1S),andthemultilaboratoryprecisionhasbeenfoundtobe0.35(1S)asdefinedinPracticeE177;therefore,theresultsoftwoproperlyconductedtestsbythesameoperatorinalaboratoryshouldagreewithin0.7percentagepoint,andtestresultsbetweentwolaboratoriesshouldagreewith1.0percent-agepoint95%ofthetime.
9.Keywords
9.1consistency;normalconsistency;Vicatneedles
FIG.1VicatApparatus
NOTE1—TherequirementthattherodbemadeofstainlesssteelshallapplyonlytonewVicatapparatusorreplacementrodsandnottoequipmentinusewhichmeetstheotherrequirementsofthistestmethod.
4.4FlatTrowel,havingasharpenedstraight-edgedsteelblade100to150mminlength.
5.TemperatureandHumidity
5.1ThetemperatureoftheairandmixingwatershallconformtotherequirementsofSpecificationC511.
5.2TherelativehumidityofthelaboratoryshallconformtotherequirementsofSpecificationC511.
6.Procedure
6.1PreparationofCementPaste—Mix650gofcementwithameasuredquantityofwaterfollowingtheprocedureprescribedintheProcedureforMixingPastesofPracticeC305.ThewatershallconformtothenumericallimitsofSpecificationD1193forTypeIIIorTypeIVgradeofreagentwater.
6.2MoldingTestSpecimen—Quicklyformthecementpaste,preparedasdescribedin6.1,intotheapproximateshapeofaballwithglovedhands.Thentosssixtimesthroughafree
Foradditionalusefulinformationondetailsofcementtestmethods,referencemaybemadetothe“ManualofCementTesting,”
whichappearsintheAnnualBookofASTMStandards,Vol04.01.
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C187–10
SUMMARYOFCHANGES
CommitteeC01hasidentifiedthelocationofselectedchangestothistestmethodsincethelastissue,C187–04,thatmayimpacttheuseofthistestmethod.(ApprovedMay1,2010)
(1)RevisedSection5torefertoSpecificationC511fortemperatureandrelativehumidityrequirements.(2)Revisedthestandard,includingFig.1,tobesolelyinSIunits.
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