【astm標準】d 6459 - 15

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