1、Designation:D652807Standard Test Method forConsolidated Undrained Direct Simple Shear Testing ofCohesive Soils1This standard is issued under the fixed designation D6528;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、 revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This test method defines equipment specifications andtesting procedures for the measurement of constant volumestrength and str
3、ess-strain characteristics of cohesive soils afterone-dimensional consolidation using a constant rate of simpleshear deformation mode of loading.The constant volumecondition is equivalent to the undrained condition for saturatedspecimens.1.2 This test method is written specifically for devices thatt
4、est rectangular parallelepiped or cylindrical specimens.Othermore general devices,such as the torsional shear hollowcylinder,may be used to perform consolidated constant volumesimple shear tests but are beyond the scope of this test method.1.3 This test method is applicable to testing intact,labora-
5、tory reconstituted,and compacted soils,however,it does notinclude specific guidance for reconstituting or compacting testspecimens.1.4 It shall be the responsibility of the agency requestingthis test to specify the magnitude of the normal consolidationstress prior to constant volume shear and,when a
6、ppropriate,the maximum normal consolidation stress,which will result inan overconsolidated specimen.1.5 All recorded and calculated values shall conform to theguide for significant digits and rounding established in PracticeD6026.1.5.1 The procedures used to specify how data are collected/recorded a
7、nd calculated in this test method are regarded as theindustry 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 f
8、or the users objectives;it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof this test method to consider significant digits used inanalysis methods for engineering design.1.5.2 Measurements made to more s
9、ignificant digits orbetter sensitivity than specified in this standard shall not beregarded a nonconformance with this standard.1.6 The values stated in SI units are to be regarded as thestandard.Reporting test results in units other than SI shall beregarded as conformance with this test method.1.6.
10、1 In the engineering profession it is customary practiceto use,interchangeably,units representing both mass and force,unless dynamic calculations(F=Ma)are involved.This implic-itly combines two separate systems of units,that is,theabsolute system and the gravimetric system.It is scientificallyundesi
11、rable to combine two separate systems within a singlestandard.This test method has been written using SI units;however,inch-pound conversions are given in the gravimetricsystem,where the pound(lbf)represents a unit of force(weight).The use of balances or scales recording pounds ofmass(lbm),or the re
12、cording of density in lb/ft3should not beregarded as nonconformance with this test method.1.7 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
13、and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D422 Test Method for Particle-Size Analysis of SoilsD653 Terminology Relating to Soil,Rock,and ContainedFluidsD854 Test Methods for Specific Gravity of Soil Solids byWater PycnometerD1587
14、 Practice for Thin-Walled Tube Sampling of Soils forGeotechnical PurposesD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2435 Test Methods for One-Dimensional ConsolidationProperties of Soils Using Incremental LoadingD2487 Practice for Classificatio
15、n of Soils for EngineeringPurposes(Unified Soil Classification System)D2488 Practice for Description and Identification of Soils1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.05 on Strength andCompressibility of S
16、oils.Current edition approved Nov.15,2007.Published December 2007.Originallyapproved in 2000.Last previous edition approved in 2000 as D6528 00.DOI:10.1520/D6528-07.*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(Visual-Manual Procedure)D3550 Practice for Thick Wall,Ring-Lined,Split Barrel,Drive Sampling of SoilsD3740 Practice for Minimum Requirements for AgenciesEngaged
