骨料--美国河砂标准ASTM-C-144-2004

Designation:C144–03AmericanAssociationStateHighwayandTransportationOfficialsStandardAASHTONo.:M45-70(1974)StandardSpecificationforAggregateforMasonryMortar1ThisstandardisissuedunderthefixeddesignationC144;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheDepartmentofDefense.1.Scope1.1Thisspecificationcoversaggregateforuseinmasonrymortar.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thefollowingprecautionarycaveatpertainsonlytothetestmethodsportion,Section7,ofthisstandard.Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:C40TestMethodforOrganicImpuritiesinFineAggre-gatesforConcrete2C87TestMethodforEffectofOrganicImpuritiesinFineAggregateonStrengthofMortar2C88TestMethodforSoundnessofAggregatesbyUseofSodiumSulfateorMagnesiumSulfate2C117TestMethodforMaterialsFinerthan75-μm(No.200)SieveinMineralAggregatesbyWashing2C123TestMethodforLightweightPiecesinAggregate2C128TestMethodforSpecificGravityandAbsorptionofFineAggregate2C136TestMethodforSieveAnalysisofFineandCoarseAggregates2C142TestMethodforClayLumpsandFriableParticlesinAggregates2C270SpecificationforMortarforUnitMasonry3C404SpecificationforAggregatesforMasonryGrout3D75PracticeforSamplingAggregates43.MaterialsandManufacture3.1Aggregateforuseinmasonrymortarshallconsistofnaturalsandormanufacturedsand.Manufacturedsandistheproductobtainedbycrushingstone,gravel,orair-cooledironblast-furnaceslagspeciallyprocessedtoensuresuitablegra-dation.NOTE1—Careshouldbetakentoensureasuitableparticleshape,sinceexcessivequantitiesofflatandelongatedparticleshavehistoricallycausedproblemswithworkability.4.Grading4.1Aggregateforuseinmasonrymortarshallbegradedwithinthefollowinglimits,dependinguponwhethernaturalsandormanufacturedsandistobeused:PercentPassingSieveSizeNaturalSandManufacturedSand4.75-mm(No.4)1001002.36-mm(No.8)95to10095to1001.18-mm(No.16)70to10070to100600-μm(No.30)40to7540to75300-μm(No.50)10to3520to40150-μm(No.100)2to1510to2575-μm(No.200)0to50to104.2Theaggregateshallnothavemorethan50%retainedbetweenanytwoconsecutivesievesofthoselistedin4.1normorethan25%between300-μm(No.50)andthe150-μm(No.100)sieve.4.3Ifthefinenessmodulusvariesbymorethan0.20fromthevalueassumedinselectingproportionsforthemortar,theaggregateshallberejectedunlesssuitableadjustmentsaremadeinproportionstocompensateforthechangeingrading.NOTE2—Forheavyconstructionemployingjointsthickerthan12.5mm(1⁄2in.),acoarseraggregatemaybedesirable;forsuchworkafineaggregateconformingtoSpecificationC404issatisfactory.4.4Whenanaggregatefailsthegradationlimitsspecifiedin4.1and4.2,itmaybeusedprovidedthemortarcanbeprepared1ThisspecificationisunderthejurisdictionofASTMCommitteeC12onMortarsforUnitMasonryandisthedirectresponsibilityofSubcommitteeC12.04onSpecificationsforAggregatesforMortar.CurrenteditionapprovedJanuary10,2003.PublishedJune2003.OriginallypublishedasC144–39T.LastpreviouseditionC144–01.2AnnualBookofASTMStandards,Vol04.02.3AnnualBookofASTMStandards,Vol04.05.4AnnualBookofASTMStandards,Vol04.03.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.tocomplywiththeaggregateratio,waterretention,aircontent,andcompressivestrengthrequirementsofthepropertyspeci-ficationsofSpecificationC270.5.Composition5.1DeleteriousSubstances—Theamountofdeleterioussubstancesinaggregateformasonrymortar,eachdeterminedonindependentsamplescomplyingwiththegradingrequire-mentsofSection4,shallnotexceedthefollowing:ItemMaximumPermissibleWeightPercentFriableparticles1.0Lightweightparticles,floatingonliquidhavingaspecificgravityof2.00.5AAThisrequirementdoesnotapplytoblast-furnaceslagaggregate.5.2OrganicImpurities:5.2.1Theaggregateshallbefreeofinjuriousamountsoforganicimpurities.Exceptashereinprovided,aggregatessubjectedtothetestfororganicimpuritiesandproducingacolordarkerthanthestandardshallberejected.5.2.2Aggregatefailinginthetestmaybeused,providedthatthediscolorationisdueprincipallytothepresenceofsmallquantitiesofcoal,lignite,orsimilardiscreteparticles.5.2.3Aggregatefailinginthetestmaybeusedprovidedthat,whentestedfortheeffectoforganicimpuritiesonstrengthofmortar,therelativestrengthatsevendayscalculatedinaccordancewiththeProcedureSectionofTestMethodC87,isnotlessthan95%.6.Soundness6.1Exceptashereinprovided,aggregatesubjectedtofivecyclesofthesoundnesstestshallshowaloss,weightedinaccordancewiththegradingofasamplecomplyingwiththelimitationssetforthinSection4,notgreaterthan10%whensodiumsulfateisusedor15%whenmagnesiumsulfateisused.6.2Aggregatefailingtomeettherequirementsof6.1maybeaccepted,providedthatmor