Designation:C1555–03aStandardPracticeforAutoclavedAeratedConcreteMasonry1ThisstandardisissuedunderthefixeddesignationC1555;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.INTRODUCTIONMasonryunitsofautoclavedaeratedconcrete(AAC)canbeproducedwithdimensionaltolerancesassmallas1⁄16in.(1.5mm).Asaconsequence,AACmasonryunitscanbelaidwithmortarjointsapproximately3⁄8in.(9mm)thick,andalsowiththinnerjoints.TheexteriorfaceoftheresultingAACmasonrywallisthenprotectedfromtheelementsusinganexteriorwytheofmasonry,acladdingsystem,orabreathablecoatingresistanttopenetrationbyliquidwater.Theinteriorfacecanbeplastered,furred,orpainted.1.Scope*1.1ThispracticeappliestoconstructionandtestingofmasonrymadeofAACunits.Itincludesorreferencestermi-nology,materialspecifications,andmethodsoftest.Itrefer-encesspecificationsandtestmethods.1.2Units—Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitswhichareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C270SpecificationforMortarforUnitMasonryC476SpecificationforGroutforMasonryC1072TestMethodforMethodforMeasurementofFlex-uralBondStrengthC1232TerminologyofMasonryC1386SpecificationforPrecastAutoclavedAeratedCon-creteHigh-PrecisionWallConstructionUnitsE72MethodsofConductingStrengthTestsofPanelsforWallConstructionE96TestMethodsforWaterVaporTransmissionofMate-rialsE514TestMethodforWaterPenetrationandLeakageThroughMasonryE518TestMethodsforFlexuralBondStrengthofMasonryE519TestMethodforDiagonalTensi...
