Designation:A820/A820M−16StandardSpecificationforSteelFibersforFiber-ReinforcedConcrete1ThisstandardisissuedunderthefixeddesignationA820/A820M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thisspecificationcoversminimumrequirementsforsteelfibersintendedforuseinfiber-reinforcedconcrete.Fivetypesofsteelfibersforthispurposearedefinedaspiecesofsmoothordeformedcold-drawnwire;smoothordeformedcutsheet;melt-extractedfibers;mill-cutormodifiedcold-drawnwiresteelfibersthataresufficientlysmalltobedispersedatrandominaconcretemixture.1.2Thisspecificationprovidesformeasurementofdimensions,tolerancesfromspecifieddimensions,andre-quiredminimumphysicalproperties,andprescribestestingprocedurestoestablishconformancetotheserequirements.1.3Inthecaseofconflictbetweenarequirementofaproductspecificationandarequirementofthisspecification,theproductspecificationshallprevail.Inthecaseofaconflictbetweenarequirementoftheproductspecificationorarequirementofthisspecificationandamorestringentrequire-mentofthepurchaseorder,thepurchaseordershallprevail.Thepurchaseorderrequirementsshallnottakeprecedenceifthey,inanyway,violatetherequirementsoftheproductspecificationorthisspecification;forexample,bythewaivingofatestrequirementorbymakingatestrequirementlessstringent.1.4ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.2.ReferencedDocuments2.1Thefollowingdocuments,oftheissueineffectonthedateofmaterialpurchase,formapartofthisspecificationtotheextentreferencedherein.2.2ASTMStandards:2A370TestMethodsandDefinitionsforMechanicalTestingofSteelProductsA700GuideforPackaging,Marking...
