Designation:D8271−21StandardTestMethodfortheDirectMeasurementofSurfaceProfileofPreparedConcrete1ThisstandardisissuedunderthefixeddesignationD8271;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodissuitableforbothfieldandlaboratoryusetoquantifythedepthofsurfaceprofileofpreparedconcrete.Itmayalsobeusedonunpreparedconcretesurfaces.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesafterSIunitsareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafety,health,andenvironmentalpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalStandards,GuidesandRecom-mendationsissuedbytheWorldTradeOrganizationTechnicalBarrierstoTrade(TBT)Committee.2.ReferencedDocuments2.1ASTMStandards:2D4417TestMethodsforFieldMeasurementofSurfaceProfileofBlastCleanedSteelE177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE178PracticeforDealingWithOutlyingObservationsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethod3.SummaryofTestMethod3.1Thedepthofprofileismeasuredusingafinepointedprobeatapredeterminednumberoflocations,andtherangeandarithmeticmeanofthemaximumpeak-to-valleydistancesisdetermined.4.SignificanceandUse4.1Properbondingofcoatingsandliningstoconcretesurfacesrequirespropercleaningandfrequentlyrequirestheconcretetoberoughenedtoincreasethesurfacearea.Theroughness,alsoknownassurfaceprofile,canbeimpartedintoconcretebyabrasiveblastcleaning,acidetc...
