Designation:D4261−05(Reapproved2018)StandardPracticeforSurfaceCleaningConcreteMasonryUnitsforCoating1ThisstandardisissuedunderthefixeddesignationD4261;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticecoverssurfacecleaningofconcretema-sonryunitstoremovedust,dirt,mortarspatter,oil,andgreasepriortotheapplicationofcoatings.Proceduresincludevacuumcleaning,air-blastcleaning,watercleaning,detergentwaterwash,steamcleaning,andmechanicalcleaning.1.2Thispracticemayalterthesurfaceprofileoftheconcretebutisprimarilyintendedtocleanthesurface.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.Forspecifichazardstatements,seeSection5.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4258PracticeforSurfaceCleaningConcreteforCoatingD4262TestMethodforpHofChemicallyCleanedorEtchedConcreteSurfacesD4263TestMethodforIndicatingMoistureinConcretebythePlasticSheetMethod2.2OtherStandard:ACI531.1-76SpecificationforConcreteMasonryConstruc-tion33.SummaryofPractice3.1Surfacecleaningisintendedtoprovideaclean,contamination-freesurfacesuitablefortheapplicationofcoatings.3.2Acceptablesurfacesshallbefreeofdust,dirt,mortarspatter,oil,grease,andothercontaminants.Mortarjointsshallbestruckflushortooledwitharoundjointerandshallbefreeofroughedgesandnibs(seeACI531.1-76).3.3Vacuumcleaning,airblastcleaning,wate...
