ASTM_D_7830_-_D_7830M_-_14.pdf

Designation:D7830/D7830M14Standard Test Method forIn-Place Density(Unit Weight)and Water Content of SoilUsing an Electromagnetic Soil Density Gauge1This standard is issued under the fixed designation D7830/D7830M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method covers the procedures for determiningin-place properties of non-frozen,unbound soil and soil aggre-gate mixtures such as total density,gravimetric water contentand relative compaction by measuring the intrinsic impedanceof the compacted soil.1.1.1 The method and device described in this test methodare intended for in-process quality control of earthwork proj-ects.Site or material characterization is not an intended result.1.2 UnitsThe values stated in either SI units or inch-pound units given in brackets are to be regarded separately asstandard.The values stated in each system may not be exactequivalents;therefore,each system shall be used independentlyof the other.Combining values from the two systems mayresult in non-conformance with the standard.1.2.1 The gravitational system of inch-pound units is usedwhen dealing with inch-pound units.In this system,the pound(lbf)represents a unit of force(weight)while the unit for massis slugs.The rationalized slug unit is not given in this standard.1.2.2 In the engineering profession,it is customary practiceto use,interchangeably,units representing both mass and force,unless dynamic calculations are involved.This implicitlycombines two separate systems of units,that is,the absolutesystem and the gravimetric system.It is undesirable to combinethe use of two separate systems within a single standard.Theuse of balances or scales recording pounds of mass(lbm),orthe recording of density in lbm/ft3should not be regarded asnonconformance with this standard.1.3 All observed and calculated values shall conform to theGuide for Significant Digits and Rounding established inPractice D6026.1.3.1 The procedures used to specify how data is collected,recorded,and calculated in this standard are regarded asindustry standard.In addition,they are representative of thesignificant digits that should generally be retained.The proce-dures used do not consider material variation,purpose forobtaining the data,special purpose studies,or any consider-ations for the users objectives;and it is common practice toincrease or decrease the number of significant digits of reporteddata commensurate with these considerations.It is beyond thescope of this standard to consider significant digits used in theanalysis methods for engineering design.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.NOTE1ASTM International takes no position respecting the validityof any patent rights asserted in connection with any item mentioned in thisstandard.Users of this standard are expressly advised that determinationof the validity of any such patent rights,and the risk of infringement ofsuch rights,are entirely their own responsibility.2.Referenced Documents2.1 ASTM Standards:2D422 Test Method for Particle-Size Analysis of SoilsD653 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)D1556 Test Method for Density and Unit Weight of Soil inPlace by Sand-Cone MethodD1557 Test Methods for Laboratory Compaction Character-istics of Soil Using Modified Effort(56,000 ft-lbf/ft3(2,700 kN-m/m3)D2167 Test Method for Density and Unit Weight of Soil inPlace by the Rubber Balloon MethodD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2937 Test Method for Density of Soil in Place by theDrive-Cylinder Method1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.08 on Special andConstruction Control Tests.Current edition approved.Published November 2014.Originally approved in2013.Last previous edition approved in 2013 as D7830 13.DOI:10.1520/D7830_D7830M14.2For 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.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or I