1、Designation:D494318Standard Test Method forShrinkage Factors of Cohesive Soils by the WaterSubmersion Method1This standard is issued under the fixed designation D4943;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.Scope*1.1 This test method covers the procedure for determiningthe shrinkage factors of cohesive soils,using the water sub-mersion techniq
3、ue,whereby the volume of a dried soil pat isdetermined while suspended in a water bath.1.2 The data obtained following this test method are alsoused to determine the shrinkage ratio,volumetric shrinkage,and linear shrinkage of the soil.1.3 This test method is applicable only for cohesive soils.1.4 S
4、ince this test method is performed only on that portionof a soil which passes the 425-m(No.40)sieve,the relativeconsistency of the tested portion of the soil to the properties ofthe sample as a whole must be considered when evaluating theentire soil sample.1.5 All recorded and calculated values shal
5、l conform to theguide for significant digits and rounding established in PracticeD6026.1.5.1 The procedures,used to specify how data arecollected/recorded and calculated in this standard,are regardedas the industry standard.In addition,they are representative ofthe significant digits that should gen
6、erally be retained.Theprocedures 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 reduce significant digits of reported data to becommensurate with these consideration
7、s.It is beyond the scopeof this standard to consider significant digits used in analysismethods for engineering design.1.6 UnitsThe values stated in SI units are to be regardedas standard except the sieve designations are shown using thealternative sieve designation in parentheses.No other units ofm
8、easurement are included in this standard.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,health,and environmental practices and deter-mine the applicability of
9、 regulatory limitations prior to use.For specific safety hazards,see Section 8.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides an
10、d Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C670 Practice for Preparing Precision and Bias Statementsfor Test Methods for Construction MaterialsC702 Practice for Reducing Samples ofAggregate to TestingSi
11、zeD75 Practice for Sampling AggregatesD420 Guide for Site Characterization for Engineering De-sign and Construction PurposesD653 Terminology Relating to Soil,Rock,and ContainedFluidsD854 Test Methods for Specific Gravity of Soil Solids byWater PycnometerD3740 Practice for Minimum Requirements for Ag
12、enciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4318 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,andConstructio
13、n Materials TestingD6026 Practice for Using Significant Digits in GeotechnicalDataE2251 Specification for Liquid-in-Glass ASTM Thermom-eters with Low-Hazard Precision LiquidsE11 Specification for Woven Wire Test Sieve Cloth and TestSieves1This test method is under the jurisdiction ofASTM Committee D
14、18 on Soil andRock and is the direct responsibility of Subcommittee D18.03 on Texture,Plasticityand Density Characteristics of Soils.Current edition approved June 1,2018.Published July 2018.Originally approvedin 1989.Last previous edition approved in 2008 as D4943 08,which waswithdrawn April 2017 an
15、d reinstated in June 2018.DOI:10.1520/D4943-18.2For 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 Chang
16、es section appears at the end of this standardCopyright 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 Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 3.Terminology3.1 Definitions:3