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1、Designation:D6459?15StardTestMethodfDeterminationofRolledErosionControlProduct(RECP)PerfmanceinProtectingHillslopesfromRainfallInducedErosion1ThisstardisissuedunderthefixeddesignationD6459thenumberimmediatelyfollowingthe
2、designationindicatestheyearofiginaladoptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thi
3、stestmethodcoverstheguidelinesrequirementsproceduresfevaluatingtheabilityofRolledErosionControlProducts(RECPs)toprotecthillslopesfromrainfallinducederosion.CriticalelementsofthisprotectionaretheabilityoftheRECPto:1.1.1Ab
4、sbtheimpactfceofrainstherebyreducingsoilparticlelooseningthrough“splash”mechanisms1.1.2Slowrunoffencourageinfiltrationtherebyreducingsoilparticledisplacementtransptthrough“overlflow”mechanisms1.1.3Absbshearfcesofoverlflo
5、w1.1.4Trapsoilparticlesbeneath.1.2Thistestmethodutilizesfullscaletestingproceduresratherthanreducedscale(benchscale)simulationispatternedafterconditionstypicallyfoundonconstructionsitesattheconclusionofearthwkoperationsb
6、utpritothestartofrevegetationwk.Therefethisconsidersonlyunvegetatedconditions.1.3ThistestmethodprovidesacomparativeevaluationofanRECPtobaselinebaresoilconditionsundercontrolleddocumentedconditions.1.4ThevaluesstatedinSIu
7、nitsaretoberegardedasstard.Thevaluesgiveninparenthesesaremathematicalconversionstoinchpoundunitswhichareprovidedfinfmationonlyarenotconsideredstard.1.5Allobservedcalculatedvaluesshallconfmtotheguidelinesfsignificantdigit
8、sroundingestablishedinPracticeD6026unlesssupersededbythisstard.1.5.1Theproceduresusedtospecifyhowdataarecollectedrecdedcalculatedinthisstardareregardedastheindustrystard.Inadditiontheyarerepresentativeofthesignificantdig
9、itsthatgenerallyshouldberetained.Theproceduresuseddonotconsidermaterialvariationpurposefobtainingthedataspecialpurposestudiesanyconsiderationsftheuser’sobjectivesitiscommonpracticetoincreasereducesignificantdigitsofrepte
10、ddatatobecommensuratewiththeseconsiderations.Itisbeyondthescopeofthisstardtoconsidersignificantdigitsusedinanalyticalmethodsfengineeringdesign.1.6Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithits
11、use.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.AlsotheusermustcomplywithprevalentregulatycodessuchasOSHA(OccupationalHealthS
12、afetyAdministration)guidelineswhileusingthetestmethod.2.ReferencedDocuments2.1ASTMStards:2D653TerminologyRelatingtoSoilRockContainedFluidsD698TestMethodsfLabatyCompactionacteristicsofSoilUsingStardEfft(12400ftlbfft3(600k
13、Nmm3))D3740PracticefMinimumRequirementsfAgenciesEngagedinTestingInspectionofSoilRockasUsedinEngineeringDesignConstructionD6026PracticefUsingSignificantDigitsinGeotechnicalDataD6475TestMethodfMeasuringMassPerUnitAreaofEro
14、sionControlBlankets(Withdrawn2015)3D6525TestMethodfMeasuringNominalThicknessofRolledErosionControlProductsD6566TestMethodfMeasuringMassperUnitAreaofTurfReinfcementMats1ThistestmethodisunderthejurisdictionofASTMCommitteeD
15、18onSoilRockSubcommitteeD18.25onErosionSedimentControlTechnologyisthedirectresponsibilityofSection.02onErosionControlBlankets(ECBs).CurrenteditionapprovedNov.12015.PublishedNovember2015.iginallyapprovedin1999.Lastpreviou
16、seditionapprovedin2011asD6459–11.DOI:10.1520D645915.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsi
17、te.3Thelastapprovedversionofthishisticalstardisreferencedonwww.astm.g.ASummaryofChangessectionappearsattheendofthisstardCopyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates17.1.1Co
18、nstructanearthenembankmentusingconventionalearthwkplacementtechniques.Perfmcompactionoftheembankmenttocreateageotechnically(structurally)stableembankmentwithasurfaceslopeof3H:1Vhavingaslopelengthof12m(40ft).Fig.2showsaty
19、picalembankmentcrosssection.NOTE2—Theeffectofvariationsintestplotwidthlengthgradientdrainageconditionsarecurrentlybeingevaluated.7.1.2Platethetopsurfaceoftheembarkmentwithaminimum30cm(12in.)thickveneerofsoil.Generalsoilt
20、ypestobeusedftestingshallbeloamclays.TargetgrainsizesplasticityindicesareincludedinFig.3.Placetheveneerin15cm(6in.)liftscompactto9063%ofstardProctdensityinaccdancewithTestMethodD698.7.1.3Locatetestplotsontheembankmentusi
21、ngaplotsizeof2.4m(8ft)inwidth(crossslope)of12m(40ft)inlength(downslope).Separatethetestplotssuchthatoversprayfromtherainfallsimulatsdoesnotimpactadjacentplots.NOTE3—Theslopewidthlengthsteepnesswereedasbeingrepresentative
22、ofconditionstypicallyfoundonconstructionsites.Thistestplotconfigurationwaschosentoassureunifmityconsistenceoftestingactivities.7.1.4Isolatethetopedgesidesofeachtestplotbyawaterbarrierwhichfmstheboundaryofthetestplot.Bury
23、thebottomedgeofthebarrierapproximately10cm(4in.)todivertsurfaceflowsuchthatnointrusionofoutsidesurfacewaterontothetestplot(“runon”)occurs.Thebarriershallbecontinuoussuchthatjointsdonotallowoutsideflowtoentertheplot.Comme
24、rciallyavailablelawnedgingissuitablefthispurpose.7.1.5Loosenthesoilveneertoadepthofapproximately10cm(4in.)usingatillerotherappropriatetools.Rakethetilledplotsmoothwithasteelhrakelightlycompactusingaturfroller.Repairdepre
25、ssionsvoidssoftuncompactedareasbefetestingcommences.Alsofreetheplotfromobstructionprotrusionssuchasrootslargestonesotherfeignmaterial.SoilpreparationmethodsfbaresoiltestingFIG.1TypicalRainfallSimulatFIG.2TypicalEmbankmen
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