Designation:D5493−06(Reapproved2016)StandardTestMethodforPermittivityofGeotextilesUnderLoad1ThisstandardisissuedunderthefixeddesignationD5493;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofthewaterpermittivitybehaviorofgeotextilesinadirectionnormaltotheplaneofthegeotextilewhensubjectedtospecificnormalcompressiveloads.1.2Useofthistestmethodislimitedtogeotextiles.Thistestmethodisnotintendedforapplicationwithgeotextile-relatedproductssuchasgeogrids,geonets,geomembranes,andothergeocomposites.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Theinch-poundunitsgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD653TerminologyRelatingtoSoil,Rock,andContainedFluidsD4354PracticeforSamplingofGeosyntheticsandRolledErosionControlProducts(RECPs)forTestingD4439TerminologyforGeosyntheticsD4491/D4491MTestMethodsforWaterPermeabilityofGeotextilesbyPermittivityD4716/D4716MTestMethodforDeterminingthe(In-plane)FlowRateperUnitWidthandHydraulicTransmissivityofaGeosyntheticUsingaConstantHeadE11SpecificationforWovenWireTestSieveClothandTestSieves3.Terminology3.1Definitions:3.1.1geotextile,n—anypermeabletextilematerialusedwithfoundation,soil,rock,earth,oranyothergeotechnicalengineeringrelatedmaterialasanintegralpartofamanmadeproject,structure,orsystem(seeTerminologyD4439).3.1.2hydraulicgradient,i,n—thelossofhydraulicheadperunitdistanceofflow,dh/dL(seeTestMethodD4716/D4716M).3.1.3permittivity,(ψ),(T-1),n—ofgeotextiles,thevolumet...
