ASTM_D_1997_-_20.pdf

Designation:D199720Standard Test Method forLaboratory Determination of the Fiber Content of Peat andOrganic Soils by Dry Mass1This standard is issued under the fixed designation D1997;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.1.Scope*1.1 This test method covers the laboratory determination ofthe fiber content of peat and organic soils by dry mass.Classification D4427 provides the methodology to classify peatas it is used in this standard.1.2 Pieces of plant material such as roots or wood,largerthan 20 mm in smallest dimension are not considered fibers.1.3 Because this test method is simple and does not needsophisticated equipment in order to be performed,it is espe-cially recommended for routine reconnaissance work wherelarge numbers of samples need to be tested and mineralcontents are low.1.4 UnitsThe values stated in SI units are to be regardedas standard.No other units of measurement are included in thisstandard.Alternate sieve designations in parentheses are asprovided in Specification E11.1.5 All observed and calculated values shall conform to theguidelines for significant digits and rounding established inPractice D6026.1.6 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 regulatory limitations prior to use.1.7 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 and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil,Rock,and ContainedFluidsD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by MassD2974 Test Methods for Determining the Water(Moisture)Content,Ash Content,and Organic Material of Peat andOther Organic SoilsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4427 Classification of Peat Samples by Laboratory TestingD4753 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 GeotechnicalDataD6913 Test Methods for Particle-Size Distribution(Grada-tion)of Soils Using Sieve AnalysisE11 Specification for Woven Wire Test Sieve Cloth and TestSieves3.Terminology3.1 Definitions:3.1.1 For definitions of common technical terms used in thisstandard,refer to Terminology D653.4.Summary of Test Method34.1 A sample of peat or organic soil is reduced usingquartering to obtain a representative sample.The representa-tive sample is further reduced via quartering to obtain a test1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.22 on Media for PlantGrowth.Current edition approved March 1,2020.Published March 2020.Originallyapproved in 1991.Last previous edition approved in 2013 as D1997 13.DOI:10.1520/D1997-20.2For 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.3This test method is a modified version of one described in:Riley,J.L.,“Laboratory Methods for Testing Peat,”Ontario Peatland Inventory Project,Ontario Geological Survey Open File Report 5572,1986,pp.2122.*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 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.specimen.A portion of the test specimen is used to obtain awater content determination.Another portion of the test speci-men is placed in a beaker and mixed with a dispersing agentand allowed to stand for approximately 15 h.The mixture isthen poured over a sieve stack.Materials larger than 20 mm areremoved and the remaining specimen is washed until the waterruns clear.Then,the sieve with the specimen is soaked in HClfor 10 min and rewashed.The specimen is then filtered.Thespecimen retained on the filter and the filter paper is t