Designation:D5891−02(Reapproved2009)StandardTestMethodforFluidLossofClayComponentofGeosyntheticClayLiners1ThisstandardisissuedunderthefixeddesignationD5891;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversanindexmethodthatenablestheevaluationoffluidlosspropertiesofaclaymineralfilmdepositedonafilterpaperfroma6%solidsslurryofclaymineralat100-psi(-kPa)pressureasameasureofitsuseful-nessforpermeabilityorhydraulicconductivityreductioningeosyntheticclayliners(GCL).1.2ThistestmethodisadaptedfromAmericanPetroleumInstitutedrillingfluidspecificationsforbentonite.1.3Powderedclaymineralistestedasproduced;granularclaymineralshouldbegroundto100%passinga100meshU.S.StandardSievewithaminimumof65%passinga200meshU.S.StandardSievewiththewholegroundproductusedfortesting.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.22.ReferencedDocuments2.1ASTMStandards:3D1193SpecificationforReagentWaterE1SpecificationforASTMLiquid-in-GlassThermometersE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodE725TestMethodforSamplingGranularCarriersandGranularPesticides2.2APIStandards:APIRP131,RecommendedPracticeforLaboratoryTestingofDrillingFluids43.Terminology3.1Definitions—Fordefinitionsoftermsusedinthistestmethod,refertoAPIStandardsandASTMdefinitionsforGCLproducts.4.SignificanceandUse4.1ClaymineralisthefunctionalcomponentofGCLthatreducesthehydraulicconductivityofindustrialwasteorgroundwaterthroughtheliner.4.2Claymineralqualitycanvarysignifica...
