ASTM D8187-18

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D8187 − 18
Standard Guide for
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Interpretation of Standard Humidity Cell Test Results
This standard is issued under the fixed designation D8187; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 1.5 This guide is intended to facilitate use of Test Method
D5744 to meet kinetic testing regulatory requirements for
1.1 This kinetic test guide covers interpretation and coop-
metallurgical processing products, mining waste rock, and ores
erative management of a standard laboratory weathering
sized to pass a 6.3-mm (0.25-in.) Tyler screen.
procedure, Test Method D5744. The guide suggests strategies
1.5.1 Interpretation of standard humidity cell test results has
foranalysisandinterpretationofdataproducedbyTestMethod
been found to be useful for segregation of ore and waste and
D5744 on mining waste rock, metallurgical processing wastes,
design of proper stockpiling and disposal facilities.
and ores.
1.1.1 Cooperative management of the testing involves 1.6 Interlaboratory testing of the standard D5744 humidity
agreement of stakeholders in defining the objectives of the cell has been confined to mine waste rock. Application of this
testing, analytical requirements, planning the initial estimate of guide to metallurgical processing waste (for example, mill
duration of the testing, and discussion of the results at decision process tailings) is not supported by interlaboratory test data.
points to determine if the testing period needs to be extended Method B of Test Method D5744, however, has been found
and the disposition of the residues.
useful for testing of metallurgical products, and this guide is
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also useful for interpretation of those results (1).
1.2 The humidity cell test (HCT) enhances reaction product
transport in the aqueous leach of a solid material sample of
1.7 Thisguideisintendedtodescribevariousproceduresfor
specified mass. Standard conditions allow comparison of the interpreting the results from standard laboratory weathering of
relative reactivity of materials during interpretation of results.
solid materials in accordance with Test Method D5744. It does
not describe all types of sampling and analytical requirements
1.3 The HCT measures rates of weathering product mass
that may be associated with its application, nor all procedures
release. Soluble weathering products are mobilized by a
for interpretation of results.
fixed-volume aqueous leach that is performed and collected
weekly. Leachate samples are analyzed for pH, alkalinity/ 1.8 The values stated in SI units are to be regarded as
acidity, specific conductance, sulfates, and other selected
standard. No other units of measurement are included in this
analyteswhichmayberegulatedintheenvironmentaldrainage guide.
at a particular mining or metallurgical processing site.
1.8.1 Exception—The values given in parentheses are for
information only.
1.4 This guide covers the interpretation of standard humid-
ity cell tests conducted to obtain results for the following 1.9 This standard does not purport to address all of the
objectives: safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
Guide and Objective Sections
A – Confirmation of Static Testing Results 5 – 6
priate safety, health, and environmental practices and deter-
B – Evaluation of Reactivity and Leachate Quality
mine the applicability of regulatory limitations prior to use.
for Segregating Mine, Processing Waste, or 7 – 8
1.10 This international standard was developed in accor-
Ore
C – Evaluation of Quality of Neutralization
dance with internationally recognized principles on standard-
Potential Available to React with Produced 9 – 10
ization established in the Decision on Principles for the
Acid
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
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This guide is under the jurisdiction of ASTM Committee D34 on Waste
Management and is the direct responsibility of Subcommittee D34.01.04 on Waste
Leaching Techniques.
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Current edition approved April 1, 2018. Published May 2018. Originally The boldface numbers in parentheses refer to a list of references at the end of
approved in 2018. DOI: 10.1520/D8187-18. this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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