ASTM_D_8187_-_18.pdf

Designation:D818718Standard Guide forInterpretation of Standard Humidity Cell Test Results1This standard is issued under the fixed designation D8187;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.Scope1.1 This kinetic test guide covers interpretation and coop-erative management of a standard laboratory weatheringprocedure,Test Method D5744.The guide suggests strategiesfor analysis and interpretation of data produced by Test MethodD5744 on mining waste rock,metallurgical processing wastes,and ores.1.1.1 Cooperative management of the testing involvesagreement of stakeholders in defining the objectives of thetesting,analytical requirements,planning the initial estimate ofduration of the testing,and discussion of the results at decisionpoints to determine if the testing period needs to be extendedand the disposition of the residues.1.2 The humidity cell test(HCT)enhances reaction producttransport in the aqueous leach of a solid material sample ofspecified mass.Standard conditions allow comparison of therelative reactivity of materials during interpretation of results.1.3 The HCT measures rates of weathering product massrelease.Soluble weathering products are mobilized by afixed-volume aqueous leach that is performed and collectedweekly.Leachate samples are analyzed for pH,alkalinity/acidity,specific conductance,sulfates,and other selectedanalytes which may be regulated in the environmental drainageat a particular mining or metallurgical processing site.1.4 This guide covers the interpretation of standard humid-ity cell tests conducted to obtain results for the followingobjectives:Guide and ObjectiveSectionsA Confirmation of Static Testing Results5 6B Evaluation of Reactivity and Leachate Qualityfor Segregating Mine,Processing Waste,orOre7 8C Evaluation of Quality of NeutralizationPotential Available to React with ProducedAcid9 101.5 This guide is intended to facilitate use of Test MethodD5744 to meet kinetic testing regulatory requirements formetallurgical processing products,mining waste rock,and oressized to pass a 6.3-mm(0.25-in.)Tyler screen.1.5.1 Interpretation of standard humidity cell test results hasbeen found to be useful for segregation of ore and waste anddesign of proper stockpiling and disposal facilities.1.6 Interlaboratory testing of the standard D5744 humiditycell has been confined to mine waste rock.Application of thisguide to metallurgical processing waste(for example,millprocess tailings)is not supported by interlaboratory test data.Method B of Test Method D5744,however,has been founduseful for testing of metallurgical products,and this guide isalso useful for interpretation of those results(1).21.7 This guide is intended to describe various procedures forinterpreting the results from standard laboratory weathering ofsolid materials in accordance with Test Method D5744.It doesnot describe all types of sampling and analytical requirementsthat may be associated with its application,nor all proceduresfor interpretation of results.1.8 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisguide.1.8.1 ExceptionThe values given in parentheses are forinformation only.1.9 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.1.10 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.1This guide 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 April 1,2018.Published May 2018.Originallyapproved in 2018.DOI:10.1520/D8187-18.2The boldface numbers in parentheses refer to a list of references at the end ofthis standard.Copyright 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 2.Referenced Documents2.1 ASTM Standards:3D5681 Terminology for Waste and Waste ManagementD5744 Test Method for Laboratory Weathering of SolidMaterials Using a