1、Designation:D2980171Standard Test Method forSaturated Density,Moisture-Holding Capacity,and Porosityof Saturated Peat Materials1This standard is issued under the fixed designation D2980;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision
2、,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.1NOTEEditorially updated units of measurement statement in April 2018.1.Scope*1.1 This test method was designed to evalua
3、te the aeration,water penetration,and water retention properties of peat underfield conditions of water saturation by measurement of thesaturated density,the moisture holding capacity,and theporosity.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses afte
4、r SI units areprovided for information only and are not considered standard.1.3 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.3.1 The procedures used to specify how data are collected/recorded or calculated in thi
5、s standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that generally should 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
6、;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these considerations.It is beyond the scopeof this standard to consider significant digits used in analysismethods for engineering design1.4 This standard does not purport to address all of the
7、safety 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 regulatory limitations prior to use.1.5 This international standard was developed in accor-dance
8、 with internationally 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
9、:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2974 Test Methods for Moisture,Ash,and Organic Matterof Peat and Other Organic SoilsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD475
10、3 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 GeotechnicalDataE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definitions:3.1.1 For co
11、mmon definitions of common terms in thisstandard,refer to Terminology D653.4.Summary of Test Method4.1 The test method sets up standardized conditions formeasuring the volume and mass of saturated peat.From thesedata,saturated volume,mass,moisture-holding capacity(on amass and volume basis),dry peat
12、 volumes,and porosity can bedetermined.5.Significance and Use5.1 This test method measures the air-filled spaces(poros-ity)and the moisture-holding capacity of peat on both a massand a volume basis under conditions of saturation.If large1This test method is under the jurisdiction ofASTM Committee D1
13、8 on Soil andRock and is the direct responsibility of Subcommittee D18.22 on Media for PlantGrowth.Current edition approved Feb.1,2017.Published February 2017.Originallyapproved in 1971.Last previous edition approved in 2010 as D2980 04(2010).DOI:10.1520/D2980-17E01.2For referenced ASTM standards,vi
14、sit 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 Changes section appears at the end of this standardCopyright ASTM International,100 B
15、arr 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 Recommend
16、ations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 spaces are present,water and air can penetrate easily.If spacesare smaller,the water holding capacity is increased.Waterholding capacity is larger in humified peat materials(smallinter-particulate spaces)(sapric soil),whereas water and air-penetration is larger in unhumified peat(larger inter-particulatespaces)(fibric soil).The spaces can also be an indication of theoxygen available to the plant roots.As su
