1、Designation:D726309Standard Test Methods forLaboratory Determination of Density(Unit Weight)of SoilSpecimens1This standard is issued under the fixed designation D7263;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last r
2、evision.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 These test methods describe two ways of determiningthe total/moist and dry densities(unit weights)of intact,disturbed,remolded,an
3、d reconstituted(compacted)soil speci-mens.Density(unit weight)as used in this standard means thesame as“bulk density”of soil as defined by the Soil ScienceSociety of America.Intact specimens may be obtained fromthin-walled sampling tubes,block samples,or clods.Speci-mens that are remolded by dynamic
4、 or static compactionprocedures may also be measured by these methods.Thesemethods apply to soils that will retain their shape during themeasurement process and may also apply to other materialssuch as soil-cement,soil-lime,soil-bentonite or solidifiedsoil-bentonite-cement slurries.It is common for
5、the density(unit weight)of specimens after removal from sampling tubesand compaction molds to be less than the value based on tubeor mold volumes,or of in-situ conditions.This is due to thespecimen swelling after removal of lateral pressures.1.1.1 Method A covers the procedure for measuring thevolum
6、e of wax coated specimens by determining the quantityof water displaced.1.1.1.1 This method only applies to specimens in which thewax will not penetrate the outer surface of the specimen.1.1.2 Method B covers the procedure by means of the directmeasurement of the dimensions and mass of a specimen,us
7、ually one of cylindrical shape.Intact and reconstituted/remolded specimens may be tested by this method in conjunc-tion with strength,permeability(air/water)and compressibilitydeterminations.1.2 The values stated in SI units are to be regarded as thestandard.The values stated in inch-pound units are
8、 approxi-mate.1.3 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.3.1 The method used to specify how data are collected,calculated,or recorded in this standard is not directly related tothe accuracy with which the d
9、ata can be applied in design orother uses,or both.How one applies the results obtained usingthis standard is beyond its scope.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
10、-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(1
11、2 400 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)D1587 Practice for Thin-Walled Tube Sampling of Soils forGeotechnical Purpos
12、esD2166 Test Method for Unconfined Compressive Strengthof Cohesive SoilD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2487 Practice for Classification of Soils for EngineeringPurposes(Unified Soil Classification System)D2488 Practice for Descriptio
13、n and Identification of Soils(Visual-Manual Procedure)D3550 Practice for Thick Wall,Ring-Lined,Split Barrel,Drive Sampling of SoilsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock as1These test methods are under the jurisdiction ofASTM Committ
14、ee D18 on Soiland Rock and are the direct responsibility of Subcommittee D18.03 on Texture,Plasticity and Density Characteristics of Soils.Current edition approved March 15,2009.Published April 2009.DOI:10.1520/D7263-09.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact AST
15、M 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 Used in Engineering Design and Const
16、ructionD4220 Practices for Preserving and Transporting SoilSamplesD4318 Test Methods for Liquid Limit,Plastic Limit,andPlasticity Index of SoilsD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in Soil,Rock,andConstruction Materials TestingD6026 Practice for Using Significant Digits in GeotechnicalDataE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision Liquids2.2 Other Reference:Soil Science Society of America Glossary of S
