Designation:D6767−14StandardTestMethodforPoreSizeCharacteristicsofGeotextilesbyCapillaryFlowTest1ThisstandardisissuedunderthefixeddesignationD6767;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftheporesizedistributionofgeotextilefilterswithporesizesrangingfrom1to1000µm.NOTE1—Theaccuracyofthisprocedurehasbeenverifieduptoamaximumporesizeof500µm.Abovethisvalueaccuracyhasbeenfoundtobeequipmentdependentandshouldbeverifiedbytheuserthroughchecksonmaterialswithknownopeningsizes.1.2Thetestmethodmeasurestheentireporesizedistribu-tionintermsofasurfaceanalysisofspecifiedporesizesinageotextile,definedintermsofthelimitingdiameters.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1129TerminologyRelatingtoWaterD1193SpecificationforReagentWaterD4354PracticeforSamplingofGeosyntheticsandRolledErosionControlProducts(RECPs)forTestingD4439TerminologyforGeosynthetics3.Terminology3.1Definitions—Fordefinitionsofothertermsusedinthistestmethod,refertoTerminologiesD4439andD1129.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1bubblepointporesize(O98),n—thelargesteffectiveporediameterdetectedbythesuddenincreaseofflowrateatthebeginningofthewettest.3.2.2poreconstriction(O),n—diameterofacirclehavingthesameareaasthesmallestsectionofagivenpore.3.2.3poresize(Oi),n—capillaryequivalentporediameterforwhichthepercentoftotalporediametersiinagivenge...
