1、Designation:D7830/D7830M14(Reapproved 2021)1Standard 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
2、 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.1NOTEReferenced Documents section was updated editorially in July 2021.1.Sco
3、pe1.1 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 describ
4、ed 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 are to be regarded separately as standard.Thevalues stated in each system may not be
5、exact equivalents;therefore,each system shall be used independently of the other.Combining values from the two systems may result in noncon-formance 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
6、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 t
7、wo 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 asnonconforma
8、nce 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,th
9、ey 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 o
10、f 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.
11、It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE1ASTM International takes no position respecting the validityof any patent rights asserted in connectio
12、n 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.1.5 This international standard was developed in accor-dance with intern
13、ationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Termi
14、nology 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/D1556M Test Method for Density and Unit Weightof Soil in Place by Sand-Cone Method1This test method is under the jurisdiction
15、ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.08 on Special andConstruction Control Tests.Current edition approved July 15,2021.Published July 2021.Originallyapproved in 2013.Last previous edition approved in 2014 as D7830 14.DOI:10.1520/D7830_D7830M14R21E
16、01.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Princi
