Designation:D5084−10StandardTestMethodsforMeasurementofHydraulicConductivityofSaturatedPorousMaterialsUsingaFlexibleWallPermeameter1ThisstandardisissuedunderthefixeddesignationD5084;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope*1.1Thesetestmethodscoverlaboratorymeasurementofthehydraulicconductivity(alsoreferredtoascoeffıcientofper-meability)ofwater-saturatedporousmaterialswithaflexiblewallpermeameterattemperaturesbetweenabout15and30°C(59and86°F).Temperaturesoutsidethisrangemaybeused;however,theuserwouldhavetodeterminethespecificgravityofmercuryandRT(see10.3)atthosetemperaturesusingdatafromHandbookofChemistryandPhysics.Therearesixalternatemethodsorhydraulicsystemsthatmaybeusedtomeasurethehydraulicconductivity.Thesehydraulicsystemsareasfollows:1.1.1MethodA—ConstantHead1.1.2MethodB—FallingHead,constanttailwaterelevation1.1.3MethodC—FallingHead,risingtailwaterelevation1.1.4MethodD—ConstantRateofFlow1.1.5MethodE—ConstantVolume–ConstantHead(bymer-cury)1.1.6MethodF—ConstantVolume–FallingHead(bymercury),risingtailwaterelevation1.2Thesetestmethodsusewaterasthepermeantliquid;see4.3andSection6onReagentsforwaterrequirements.1.3Thesetestmethodsmaybeutilizedonallspecimentypes(undisturbed,reconstituted,remolded,compacted,etc.)thathaveahydraulicconductivitylessthanabout1×10−6m/s(1×10−4cm/s),providingtheheadlossrequirementsof5.2.3aremet.Fortheconstant-volumemethods,thehydraulicconductivitytypicallyhastobelessthanabout1×10−7m/s.1.3.1Ifthehydraulicconductivityisgreaterthanabout1×10−6m/s,butnotmorethanabout1×10−5m/s;thenthesizeofthehydraulictubingneedstobeincreasedalongwiththeporosityoftheporousendpieces.Otherstrategies,suchasusinghigherviscosityfluidorproperlydecreasingthecross-sectionalareaofthetestspecimen,orboth,mayalsobepossible.Thekeycriter...
