Designation:C1142−95(Reapproved2013)StandardSpecificationforExtendedLifeMortarforUnitMasonry1ThisstandardisissuedunderthefixeddesignationC1142;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversextendedlifemortarasdeliv-eredforuseinconstructionofnon-reinforcedorreinforcedunitmasonry.1.2Thisspecificationisapropertystandard.1.3Fourtypesofmortararecovered:RM,RS,RN,andRO.Thesetypesofmortarcanbemanufacturedbyusingoneofthefourmortarformulationswithmasonryaggregate:portlandcement,portlandcement-lime,masonrycement,ormasonrycementwithportlandcements.ThematerialsarelistedinSection5.1.4AppendixX1providesarationalestatementandcom-mentary.2.ReferencedDocuments2.1ASTMStandards:2C91SpecificationforMasonryCementC144SpecificationforAggregateforMasonryMortarC150SpecificationforPortlandCementC207SpecificationforHydratedLimeforMasonryPur-posesC270SpecificationforMortarforUnitMasonryC780TestMethodforPreconstructionandConstructionEvaluationofMortarsforPlainandReinforcedUnitMasonryC1072TestMethodsforMeasurementofMasonryFlexuralBondStrengthE447TestMethodforCompressiveStrengthofLaboratoryConstructedMasonryPrisms(Withdrawn1997)3E518TestMethodsforFlexuralBondStrengthofMasonry2.2OtherDocument:NationalInstituteofStandardsandTechnology,Handbook44,Specifications,Tolerances,andOtherTechnicalRe-quirementsforCommercialWeighingandMeasuringDevices43.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1Alltermsinthisspecificationhavetheirconventionalmeaning,exceptasfollows:3.1.2extendedlifemortars—mortarconsistingofcementi-tiousmaterials,aggregate,waterandset-controladmixtureswhicharemeasuredandmixedatacentrallocation,usingweight-or-volume-controlequipment.Thismortar,asdeliveredtoaconstructionsite,shallbeusableforaperiodinexcessof21⁄2h.4.OrderingInformati...
