1、Designation:D297414Standard Test Methods forMoisture,Ash,and Organic Matter of Peat and OtherOrganic Soils1This standard is issued under the fixed designation D2974;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.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 These test methods cover the measurement of moisturecontent,ash content,and organic matter in peats and otherorganic soils,such as
3、 organic clays,silts,and mucks.TestMethod D2216 provides an alternative method for determiningmoisture content in mineral soils and rock.1.1.1 Test Method AMoisture is determined by drying peator organic sample at 110 6 5C.1.1.2 Test Method BAlternative moisture method whichremoves the total moistur
4、e in two steps:(1)evaporation ofmoisture at room temperature,(2)subsequent oven drying ofair dried sample at 110 6 5C.This method is used when thepeat is to be used as fuel.1.1.3 Test Method CAsh content of a peat or organic soilsample,for general purposes,is determined by igniting ovendried sample
5、from moisture content determination in a furnaceat 440 6 40C.1.1.4 Test Method DAsh content of a peat or organic soilsample,for materials used for fuel,is determined by ignitingoven dried sample from moisture content determination in afurnace at 750 6 38C.1.2 Test Method A should be used for general
6、 classification,except for use of the peat as a fuel.Test Method B should beused when peats are being evaluated for use as a fuel1.3 The values stated in SI units are to be regarded as thestandard.No other units of measurement are included in thisstandard.1.4 All observed and calculated values shall
7、 conform to theguidelines for significant digits and rounding established inPractice D6026.1.4.1 The procedures used to specify how data are collected/recorded or calculated in this standard are regarded as theindustry standard.In addition,they are representative of thesignificant digits that genera
8、lly 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;and it is common practice toincrease or reduce significant digits of reported data to becommensurate with these conside
9、rations.It is beyone the scopeof this standard to consider significant digits used in analysismethods for engineering design.1.5 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 ContainedFluidsD2216 Test Methods for Laboratory Determination of Water(Moisture)Content of Soil and Rock by
11、 MassD2944 Practice of Sampling Processed Peat MaterialsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design and ConstructionD4753 Guide for Evaluating,Selecting,and Specifying Bal-ances and Standard Masses for Use in
12、Soil,Rock,andConstruction Materials TestingD6026 Practice for Using Significant Digits in GeotechnicalDataE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Terminology3.1 Definitions:3.1.1 For definitions of common technical terms in thisstandard,refer to Terminology D653.4.Sum
13、mary of Test Methods4.1 Test Method AMoisture is determined by drying a peator organic soil sample at 110 6 5C.The moisture content isexpressed as a percent of the oven dry mass.1These test methods are under the jurisdiction ofASTM Committee D18 on Soiland Rock and are the direct responsibility of S
14、ubcommittee D18.22 on Soil as aMedium for Plant Growth.Current edition approved Nov.1,2014.Published November 2014.Originallyapproved in 1971.Last previous edition approved in 2013 as D2974 13.DOI:10.1520/D2974-14.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Cust
15、omer 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 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 194
16、28-2959.United States1 4.2 Test Method BThis is an alternative moisture methodwhich removes the total moisture in two steps:(1)evaporationof moisture in air at room temperature(air-drying),and(2)thesubsequent oven drying of the air-dried sample at 110 6 5C.This method is used when the peat is to be used as fuel.Themoisture content is expressed as both a percent of the oven drymass and of the as received mass.4.3 Test Methods C and DAsh content of a peat or organicsoil sample is determined by ign
