ASTM_D_5856_-_15.pdf

Designation:D585615Standard Test Method forMeasurement of Hydraulic Conductivity of Porous MaterialUsing a Rigid-Wall,Compaction-Mold Permeameter1This standard is issued under the fixed designation D5856;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers laboratory measurement of thehydraulic conductivity(also referred to as coeffcient of per-meability)of laboratory-compacted materials with a rigid-wall,compaction-mold permeameter.1.2 This test method may be used with laboratory-compacted specimens that have a hydraulic conductivity lessthan or equal to 1 105m/s.The hydraulic conductivity ofcompacted materials that have hydraulic conductivities greaterthan 1 105m/s may be determined by Test Method D2434.1.3 UnitsThe values stated in SI units are to be regardedas the standard,unless other units are specifically given.Bytradition in U.S.practice,hydraulic conductivity is reported incm/s,although the common SI units for hydraulic conductivityare m/s.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD698 Test Methods for Laboratory Compaction Character-istics of Soil Using Standard Effort(12 400 ft-lbf/ft3(600kN-m/m3)D854 Test Methods for Specific Gravity of Soil Solids byWater PycnometerD1557 Test Methods for Laboratory Compaction Character-istics of Soil Using Modified Effort(56,000 ft-lbf/ft3(2,700 kN-m/m3)D2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2434 Test Method for Permeability of Granular Soils(Constant Head)(Withdrawn 2015)3D3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD5084 Test Methods for Measurement of Hydraulic Con-ductivity of Saturated Porous Materials Using a FlexibleWall PermeameterE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Terminology3.1 Definitions:3.1.1 hydraulic conductivity,kthe rate of discharge ofwater under laminar flow conditions through a unit cross-sectional area of a porous medium under a unit hydraulicgradient and standard temperature conditions(20C).3.1.1.1 DiscussionThe term coeffcient of permeability isoften used instead of hydraulic conductivity,but hydraulicconductivity is used exclusively in this test method.A morecomplete discussion of the terminology associated with Dar-cys law is given in the literature4.3.1.2 For common definitions of technical terms in thisstandard,refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 fluxquantity of flow per unit area per unit time.3.2.2 pore volume of flowthe cumulative quantity ofoutflow from a test specimen divided by the volume of porespace in the specimen.1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.04 on HydrologicProperties and Hydraulic Barriers.Current edition approved June 1,2015.Published July 2015.Originally approvedin 1995.Last previous edition approved in 2007 as D585695(2007).DOI:10.1520/D5856-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.4Olson,R.E.,and Daniel,D.E.,“Measurement of the Hydraulic Conductivityof Fine-Grained Soils,”Symposium on Permeability and Groundwater ContaminantTransport,ASTM STP 746,ASTM,1981,pp.1864.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 4.Significance and Use4.1 This test method applies to one-dimensional,laminarflow of water within laboratory-compacted,porous materialssuch as soil.4.2 The hydraulic conductivity of porous materials gener-ally decreases with an increasing amount of air in the pores ofthe material.This test method applies to porous materialscontaining little or no air.The test method is designed tominimize the amount of air in the test specimen.However,thistest method does not ensure complete saturation of the testspecimen with water.In cases where it is essential to saturatethe test specimen fully with water,t