Designation:C28/C28M−10(Reapproved2015)StandardSpecificationforGypsumPlasters1ThisstandardisissuedunderthefixeddesignationC28/C28M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thisspecificationcoversgypsummill-mixedplaster,gypsumneatplaster,gypsumwood-fiberedplaster,andgyp-sumgaugingplaster.NOTE1—SpecificationC842containsapplicationproceduresforinte-riorgypsumplaster.1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.Thisparagraphdoesnotapplytotheappendix.1.3Thetextofthisstandardreferencesnotesandfootnoteswhichprovideexplanatorymaterial.Thesenotesandfootnotes(excludingthoseintablesandfigures)shallnotbeconsideredasrequirementsofthestandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C11TerminologyRelatingtoGypsumandRelatedBuildingMaterialsandSystemsC22/C22MSpecificationforGypsumC35SpecificationforInorganicAggregatesforUseinGyp-sumPlasterC471MTestMethodsforChemicalAnalysisofGypsumandGypsumProducts(Metric)C472TestMethodsforPhysicalTestingofGypsum,Gyp-sumPlastersandGypsumConcreteC778SpecificationforSandC842SpecificationforApplicationofInteriorGypsumPlas-terE11SpecificationforWovenWireTestSieveClothandTestSieves3.Terminology3.1Definitions—DefinitionsshallbeinaccordancewithTerminologyC11.3.2...
