Designation:C270−14aStandardSpecificationforMortarforUnitMasonry1ThisstandardisissuedunderthefixeddesignationC270;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversmortarsforuseintheconstruc-tionofnon-reinforcedandreinforcedunitmasonrystructures.Fourtypesofmortararecoveredineachoftwoalternativespecifications:(1)proportionspecificationsand(2)propertyspecifications.NOTE1—Whenthepropertyspecificationisusedtoqualifymasonrymortars,thetestingagencyperformingthetestmethodsshouldbeevaluatedinaccordancewithPracticeC1093.1.2Theproportionorpropertyspecificationsshallgovernasspecified.1.3Whenneitherproportionorpropertyspecificationsarespecified,theproportionspecificationsshallgovern,unlessdataarepresentedtoandacceptedbythespecifiertoshowthatmortarmeetstherequirementsofthepropertyspecifications.1.4Thisstandardisnotaspecificationtodeterminemortarstrengthsthroughfieldtesting(seeSection3).1.5Thetextofthisspecificationreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.6ThetermsusedinthisspecificationareidentifiedinTerminologiesC1180andC1232.1.7Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.8Thefollowingsafetyhazardscaveatpertainsonlytothetestmethodssectionofthisspecification:Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocumen...
