ASTM_D_4718_-_87_2007.pdf

Designation:D471887(Reapproved 2007)Standard Practice forCorrection of Unit Weight and Water Content for SoilsContaining Oversize Particles1This standard is issued under the fixed designation D4718;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This practice presents a procedure for calculating theunit weights and water contents of soils containing oversizeparticles when the data are known for the soil fraction with theoversize particles removed.1.2 The practice also can be used to calculate the unitweights and water contents of soil fractions when the data areknown for the total soil sample containing oversize particles.1.3 This practice is based on tests performed on soils andsoil-rock mixtures in which the portion considered oversize isthat fraction of the material retained on the No.4 sieve.Basedon these tests,this practice is applicable to soils and soil-rockmixtures in which up to 40%of the material is retained on theNo.4 sieve.The practice also is considered valid when theoversize fraction is that portion retained on some other sieve,such as the34-in.sieve,but the limiting percentage of oversizeparticles for which the correction is valid may be lower.However,the practice is considered valid for materials havingup to 30%oversize particles when the oversize fraction is thatportion retained on the34-in.sieve.1.4 The factor controlling the maximum permissible per-centage of oversize particles is whether interference betweenthe oversize particles affects the unit weight of the finerfraction.For some gradations,this interference may begin tooccur at lower percentages of oversize particles,so the limitingpercentage must be lower for these materials to avoid inaccu-racies in the computed correction.The person or agency usingthis practice shall determine whether a lower percentage is tobe used.1.5 This practice may be applied to soils with any percent-age of oversize particles subject to the limitations given in 1.3and 1.4.However,the correction may not be of practicalsignificance for soils with only small percentages of oversizeparticles.The person or agency specifying this practice shallspecify a minimum percentage of oversize particles belowwhich the practice need not be applied.If a minimum percent-age is not specified,5%shall be used.1.6 This practice may not be applicable to soil-rock mix-tures which degrade under field compaction.1.7 This practice offers a set of instructions for performingone or more specific operations.This document cannot replaceeducation or experience and should be used in conjunctionwith professional judgment.Nat all aspects of this practice maybe applicable in all circumstances.This ASTM standard is notintended to represent or replace the standard of care by whichthe adequacy of a given professional service must be judged,nor should this document be applied without consideration ofa projects many unique aspects.The word“Standard”in thetitle of this document means only that the document has beenapproved through the ASTM consensus process.2.Referenced Documents2.1 ASTM Standards:2C127 Test Method for Density,Relative Density(SpecificGravity),and Absorption of Coarse AggregateD698 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 MassD2922 Test Methods for Density of Soil and Soil-Aggregate1This practice is under the jurisdiction of ASTM Committee D18 on Soil andRockand is the direct responsibility of Subcommittee D18.03 on Texture,Plasticityand Density Characteristics of Soils.Current edition approved Sept.1,2007.Published September 2007.Originallyapproved in 1987.Last previous edition approved in 2001 as D4718 87(2001).DOI:10.1520/D4718-87R07.2For 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 States1 in Place by Nuclear Methods(Shallow Depth)(With-drawn 2007)3D3017 Test Method for Water Content of Soil and Rock inPlace by Nuclear Methods(Shallow Depth)D4253 Test Methods for Maximum Index Density and UnitWeight of Soils Using