Designation:C1860−19StandardTestMethodsforMeasurementofTensileStrengthorBondStrengthofPortlandCement-BasedPlasterbyDirectTension1ThisstandardisissuedunderthefixeddesignationC1860;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thesetestmethodscoverproceduresfordeterminingthetensilestrengthofasectionofportlandcement-basedplaster,thebondstrengthbetweenportlandcement-basedplasterandasolidplasterbase,orthefastenerpull-outorlathpull-overstrengthforportlandcement-basedplasterbasesoverframingineitheranexterior(stucco)orinteriorapplication.Thetestproceduresaredestructiveinnaturewithinthelocalizedtestareasand,aftertestingisconcluded,requireappropriaterepairofthefinishsystemaswellasanyunderly-ingmaterialsdamagedduringtesting.1.2Thetestmethodsaresuitableforuseonportlandcement-basedplasterfinishsystemsonbothnewandexistingconstruction.Testmethodshallbeconductedaminimumof28daysafterapplicationoftheportlandcement-basedplaster.TestMethodAshallbeusedtodeterminethetensilestrengthorbondstrengthofdirect-appliedportlandcement-basedplasterandmaybeusefulinevaluatingtheefficacyofdifferentsurfacepreparationcharacteristics,bondingagents,orboth.TestMethodBshallbeusedtodeterminethetensilestrengthofportlandcement-basedplasterinstalledovermechanicallyattachedlath.1.3Thetestmethodsaresuitableforuseinbothlaboratoryandfieldsamples.Nocorrelationshallbemadebetweenlaboratoryandfieldtesting.1.4Thetestmethodsarenotintendedtoevaluatetheperformanceoftheunderlyingconstructionorframingmem-bers.Testresultsonaparticularbuildingmaybevariabledependingonthespecimenlocation,condition,andinstallation,andaresubjecttointerpretationbythetestspecifier.1.5Thetestmethodsarenotintendedtoevaluatetheperformanceofcoatingsappliedtothesurfaceoftheportlandcement-basedplaster.1.6Thetestmethodsarenotintendedt...
