Designation:A981/A981M−11(Reapproved2016)StandardTestMethodforEvaluatingBondStrengthfor0.600-in.[15.24-mm]DiameterSteelPrestressingStrand,Grade270[1860],Uncoated,UsedinPrestressedGroundAnchors1ThisstandardisissuedunderthefixeddesignationA981/A981M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesprocedurestoestablishtherelativebondstrengthof0.600-in.[15.24-mm]diameter,Grade270[1860]steelprestressingstrandincementgroutasusedinprestressedgroundanchorsforthepurposeofevaluatingtheeffectsofmanufacturingpracticesonbondstrength.1.2Thebondstrengthvaluesobtainedarenotintendedtobeusedtodesignthebondlengthofgroundanchorsthatdependonfieldconditions.1.3Thistestmethodisnotintendedtobeusedasabondtestforprestressedconcreteapplications.1.4Thevaluesstatedineitherinch-poundorSIunitsaretoberegardedasstandard.Withinthetext,theSIunitsareshowninbrackets.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2A416/A416MSpecificationforLow-Relaxation,Seven-WireSteelStrandforPrestressedConcreteC150SpecificationforPortlandCementC511SpecificationforMixingRooms,MoistCabinets,MoistRooms,andWaterStorageTanksUsedintheTestingofHydraulicCementsandConcretesC1019TestMethodforSamplingandTestingGroutE4PracticesforForceVerificationofTestingMachines3.Terminology3.1DefinitionsofTermsSpecifictoThisStandard:3.1.1bondstrength—maximummeasuredloadinapulltestona0.600-in.[1...
