1、Designation:D5744131Standard Test Method forLaboratory Weathering of Solid Materials Using a HumidityCell1This standard is issued under the fixed designation D5744;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revi
2、sion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1NOTEEditorially updated Research Report footnote information in Section 13 in December 2013.1.Scope1.1 This kinetic test method covers a labor
3、atory weatheringprocedure that(1)enhances reaction-product transport in theaqueous leach of a solid material sample of specified mass,and(2)measures rates of weathering-product mass release.Solubleweathering products are mobilized by a fixed-volume aqueousleach that is performed and collected weekly
4、.Leachate samplesare analyzed for pH,alkalinity/acidity,specific conductance,sulfate,and other selected analytes.1.1.1 This test method is intended for use to meet kinetictesting regulatory requirements for mining waste rock and oressized to pass a 6.3-mm(0.25-in.)Tyler screen.1.1.2 Interlaboratory
5、testing of this method has been con-fined to mine waste rock.Application of this test method tometallurgical-processing waste(for example,mill tailings)isoutside the scope of the test method.1.2 This test method is a modification of a laboratoryweathering procedure developed originally for miningwas
6、tes(1-3).2However,it may have useful application wher-ever gaseous oxidation coupled with aqueous leaching areimportant mechanisms for contaminant mobility.1.3 This test method calls for the weekly leaching of awell-characterized solid material sample(weighing at least1000-g),with water of specified
7、 purity,and the collection andchemical characterization of the resulting leachate.Test dura-tion is determined by the users objectives of the test.1.4 As described,this test method may not be suitable forsome materials containing plastics,polymers,or refined met-als.These materials may be resistant
8、to traditional particle sizereduction methods.1.5 Additionally,this test method has not been tested forapplicability to organic substances and volatile matter.1.6 This test method is not intended to provide leachatesthat are identical to the actual leachate produced from a solidmaterial in the field
9、 or to produce leachates to be used as thesole basis of engineering design.1.7 This test method is not intended to simulate site-specificleaching conditions.It has not been demonstrated to simulateactual disposal site leaching conditions.Furthermore,the test isnot designed to produce effluents that
10、are in chemical equilib-rium with the solid phase sample.1.8 This test method is intended to describe the procedurefor performing the laboratory weathering of solid materials.Itdoes not describe all types of sampling and analytical require-ments that may be associated with its application.1.9 The va
11、lues stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.9.1 ExceptionThe values given in parentheses are forinformation only.1.10 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theres
12、ponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3D75 Practice for Sampling AggregatesD276 Test Methods for Identification of Fibers in Texti
13、lesD420 Guide to Site Characterization for Engineering Designand Construction Purposes(Withdrawn 2011)41This test method is under the jurisdiction of ASTM Committee D34 on WasteManagement and is the direct responsibility of Subcommittee D34.01.04 on WasteLeaching Techniques.Current edition approved
14、Sept.1,2013.Published September 2013.Originallyapproved in 1996.Last previous edition approved in 2012 as D5744-12.DOI:10.1520/D5744-13E01.2The boldface numbers in parentheses refer to the list of references at the end ofthis standard.3For referenced ASTM standards,visit the ASTM website,www.astm.or
15、g,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Dr
16、ive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 D653 Terminology Relating to Soil,Rock,and ContainedFluidsD737 Test Method for Air Permeability of Textile FabricsD1067 Test Methods for Acidity or Alkalinity of WaterD1125 Test Methods for Electrical Conductivity and Resis-tivity of WaterD1193 Specification for Reagent WaterD1293 Test Methods for pH of WaterD1498 Test Method for Oxidation-Reduction Potential ofWaterD2234/D2234M Practice for Collection of a Gross Sampleof CoalD3370 P
