Designation:D5313/D5313M−21StandardTestMethodforEvaluationofDurabilityofRockforErosionControlUnderWettingandDryingConditions1ThisstandardisissuedunderthefixeddesignationD5313/D5313M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thistestmethodcoversproceduresforevaluatingthedurabilityofrockforerosioncontrolwhenexposedtowettinganddryingconditionsonslabsofrockusingbothqualitativeandquantitativemethods.Thisdurabilitytestexposestherocksamplestoacycleofwettinganddryingsuchasthoseexperiencedduetofluctuatingwaterlevelsandweatherconditions,withtestsdoneatroomtemperatureasthebaseline.Therockslabs,preparedperproceduresinPracticeD5121,areintendedtoberepresentativeoftheproposedsourceoferosioncontrolrockanditsweaknesses.1.2Thetestisappropriateforbreakwaterstone,armorstone,riprap,andgabionsizedrockmaterials.1.3Thelimitationsofthetestaretwofold.1.3.1First,thesizeofthecutrockslabspecimensmayeliminatesomeoftheinternaldefectspresentintherockstructure.Thetestspecimensmaynotberepresentativeofthequalityofthelargerrocksamplesusedinconstruction.Carefulexaminationoftherocksourceandpropersamplingisessentialinminimizingthislimitation.1.3.2Secondly,thetestrequirestherockslabstobeexposedto80cyclesofwettinganddrying.Thetestistime-intensiveandwouldrequireaminimumofthreemonthsanduptosixmonthstocompletethesamplepreparation,testing,andanalysisportionsoftheprocedure.1.4Theuseofreclaimedconcreteandothersuchmaterialsasriprapisbeyondthescopeofthistestmethod.1.5Units—ThevaluesstatedineitherSIunitsorinch-poundunits[presentedinbrackets]aretoberegardedsepa-ratelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedinde-pendentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.5.1Thegravitationalsystemofinch...
