Designation:C1357−09StandardTestMethodsforEvaluatingMasonryBondStrength1ThisstandardisissuedunderthefixeddesignationC1357;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONBondstrengthbetweenmortarandmasonryunitsisanimportantphysicalpropertyofmasonry.Increasedbondstrengthprovidesgreaterresistancetoloadsandtocracking.Bondstrengththereforeinfluencesstructuralintegrityandserviceability.1.Scope*1.1Thesetestmethodscovertheevaluationofflexuralbondstrength,normaltothebedjoints,ofmasonrybuiltofmanu-facturedmasonryunits,asdeterminedinaccordancewithTestMethodC1072.Samplingandtestingproceduresarereferenced,andtermsaredefined.Twodifferenttestmethodsarespecified,eachforadifferentpurpose:1.1.1Thefirsttestmethodisthe“TestMethodforLaboratory-PreparedSpecimens.”Itspurposeistocomparethebondstrengths(underthegivenconditions)ofmasonrymor-tars.Itcouldbeused,forexample,tocheckthequalityofmortarproductsafterproduction,ortoindicatethebondstrength(underthegivenconditions)ofamortarproductwithoutrequiringtheproducttobetestedincombinationwithmanydifferentunits.Itisnotintendedtorepresentfieldconditions.Itusesstandardconcretemasonryunits.Mortarsarebatchedbyweightequivalentsofvolumeproportionsandaremixedtoaprescribedflow.Prismsareconstructedusingajigandarebag-cured.NOTE1—Standardfiredclaymasonryunitsareunderdevelopmentbutarenotnowavailable.Whentheirdevelopmentiscomplete,theywillbeincorporatedintothesetestmethods.1.1.2Thesecondtestmethodisthe“TestMethodforField-PreparedSpecimens.”Itspurposeistoevaluatethebondstrength(underthegivenconditions)ofaparticularunit-mortarcombination,eitherforpreconstructionevaluationofmaterialsorforqualitycontrolpurposesduringconstruction.Mortarsarebatchedconventionally,andtheflowisnotprescribed.Prismsareconstructedconventionally(nojig)andarebag-c...
