Designation:E1042−02(Reapproved2014)StandardClassificationforAcousticallyAbsorptiveMaterialsAppliedbyTrowelorSpray1ThisstandardisissuedunderthefixeddesignationE1042;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisclassificationcoversmaterialsappliedbytrowelorspraytosurfacesforthepurposeofincreasingtheiracousticalabsorption.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.2.ReferencedDocuments2.1ASTMStandards:2C423TestMethodforSoundAbsorptionandSoundAbsorp-tionCoefficientsbytheReverberationRoomMethodC634TerminologyRelatingtoBuildingandEnvironmentalAcousticsE84TestMethodforSurfaceBurningCharacteristicsofBuildingMaterialsE795PracticesforMountingTestSpecimensDuringSoundAbsorptionTestsE859TestMethodforAirErosionofSprayedFire-ResistiveMaterials(SFRMs)AppliedtoStructuralMembers3.Terminology3.1Definitions:3.1.1TheacousticalterminologyusedinthisclassificationisconsistentwithTerminologyC634.3.1.2Soundabsorptionaverage(SAA)—asinglenumberrating,theaverage,roundedofftothenearest0.01,ofthesoundabsorptioncoefficientsofamaterialforthetwelveone-thirdoctavebandsfrom200through2500Hz,inclusive,measuredaccordingtoC423.4.SignificanceandUse4.1Acousticallyabsorptivematerialsareusedforthecon-trolofreverberationandechoesinrooms.Thisstandardprovidesaclassificationmethodforacousticallyabsorptivematerialsapplieddirectlytosurfacesbytrowelorbyspray.5.BasisofClassification5.1Classificationismadeaccordingtotypeofmaterial,acousticalproperties,flamespread,anddustpropensity.5.2MaterialType—Classificationofacousticallyabsorptivematerialaccordingtomaterialtypeisasfollows:5.2.1TypeI—Materialiscementitious.TypeIingredientsshallbeuniformlymixedandreadyforusebytheadditionofwater.Whenreceived,thematerialinthecontainershallbedrya...
