ASTM D7626-19
(Test Method)Standard Test Methods for Determining the Organic Treat Loading of Organophilic Clay
Standard Test Methods for Determining the Organic Treat Loading of Organophilic Clay
SIGNIFICANCE AND USE
5.1 This standard test method is intended as an index test to determine the organic treat loading of organophilic clay. This standard test method can be used for manufacturing quality control and construction quality assurance material evaluation.
5.2 The percent organic treat loading of organophilic clay is a relative indicator of its adsorptive capacity. Organophilic clay is used for remediation of contaminated sediment, soil, and groundwater.
5.3 The two test methods denote different devices, a muffle furnace and a thermal gravimetric analyzer. The thermal gravimetric analyzer may be programmed to reach a higher temperature than the muffle furnace, but the organic matter will be burnt off at 750 °C.
Note 3: The quality of the result produced by this standard is dependent on the competence of the personnel performing it, and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of those factors.
SCOPE
1.1 This standard covers two index test methods that can be used in the evaluation of the amount of organic compound chemically bonded to the base clay portion of a representative sample of organophilic clay.
1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard. Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.
Note 1: This standard is presented using SI units. Use of units other than SI is allowed. However, if other units are used, the performance of a units conversion check of the calculations should be included as a part of the calculations.
1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.
1.3.1 Two test methods are provided in this standard. The methods differ in equipment, the size of the specimen (mass) required and the significant digits reported.
1.3.2 The procedures used to specify how data are collected/recorded or calculated in this standard are regarded as the industry standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives; and it is common practice to increase or reduce significant digits of the reported data to be commensurate with these considerations. It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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.
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Designation: D7626 − 19
Standard Test Methods for
Determining the Organic Treat Loading of Organophilic
1
Clay
This standard is issued under the fixed designation D7626; 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 international standard was developed in accor-
dance with internationally recognized principles on standard-
1.1 This standard covers two index test methods that can be
ization established in the Decision on Principles for the
used in the evaluation of the amount of organic compound
Development of International Standards, Guides and Recom-
chemically bonded to the base clay portion of a representative
mendations issued by the World Trade Organization Technical
sample of organophilic clay.
Barriers to Trade (TBT) Committee.
1.2 The values stated in SI units are to be regarded as the
standard. No other units of measurement are included in this 2. Referenced Documents
standard. Reporting of test results in units other than SI shall 2
2.1 ASTM Standards:
not be regarded as nonconformance with this standard.
D653 Terminology Relating to Soil, Rock, and Contained
Fluids
NOTE 1—This standard is presented using SI units. Use of units other
than SI is allowed. However, if other units are used, the performance of a
D3740 Practice for Minimum Requirements for Agencies
units conversion check of the calculations should be included as a part of
Engaged in Testing and/or Inspection of Soil and Rock as
the calculations.
Used in Engineering Design and Construction
1.3 All observed and calculated values shall conform to the
D4753 Guide for Evaluating, Selecting, and Specifying Bal-
guidelines for significant digits and rounding established in
ances and Standard Masses for Use in Soil, Rock, and
Practice D6026.
Construction Materials Testing
1.3.1 Two test methods are provided in this standard. The
D6026 Practice for Using Significant Digits in Geotechnical
methods differ in equipment, the size of the specimen (mass)
Data
required and the significant digits reported.
E11 Specification for Woven Wire Test Sieve Cloth and Test
1.3.2 Theproceduresusedtospecifyhowdataarecollected/
Sieves
recorded or calculated in this standard are regarded as the
E145 Specification for Gravity-Convection and Forced-
industry standard. In addition, they are representative of the
Ventilation Ovens
significant digits that generally should be retained. The proce-
3. Terminology
dures used do not consider material variation, purpose for
obtaining the data, special purpose studies, or any consider-
3.1 Definitions—For definitions of common technical terms
ations for the user’s objectives; and it is common practice to
in this standard, refer to Terminology D653.
increase or reduce significant digits of the reported data to be
3.2 Definitions of Terms Specific to This Standard:
commensuratewiththeseconsiderations.Itisbeyondthescope
3.2.1 base clay, n—an untreated naturally occurring clay
of this standard to consider significant digits used in analysis
(for example, bentonite, kaolinite).
methods for engineering design.
3.2.2 initial mass loss, n—the amount of water and residual
1.4 This standard does not purport to address all of the
organic compound not bound to the base clay.
safety concerns, if any, associated with its use. It is the
3.2.3 organic treat loading, n—the amount of organic com-
responsibility of the user of this standard to establish appro-
pound chemically bonded to the base clay portion of an
priate safety, health, and environmental practices and deter-
organophilic clay.
mine the applicability of regulatory limitations prior to use.
3.2.4 organophilic, adj—having a strong affinity for oil and
other insoluble organic compounds.
1
These test methods are under the jurisdiction ofASTM Committee D18 on Soil
andRockandarethedirectresponsibilityofSubcommitteeD18.21onGroundwater
2
and Vadose Zone Investigations. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Feb. 1, 2019. Published February 2019. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2010. Last previous edition approved in 2018 as D7626–10(2018). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/D7626-19. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7626 − 19
3.2.5 organophilic clay, n—a manufactured material con- 6.4 Balance or Scale, a balance or scale for determinin
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7626 − 10 D7626 − 19
Standard Test Methods for
Determining the Organic Treat Loading of Organophilic
1
Clay
This standard is issued under the fixed designation D7626; 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
1.1 This standard covers two index test methods that can be used in the evaluation of the amount of organic compound
chemically bonded to the base clay portion of a representative sample of organophilic clay.
1.2 The values stated in SI units are to be regarded as the standard. No other units of measurement are included in this standard.
Reporting of test results in units other than SI shall not be regarded as nonconformance with this standard.
NOTE 1—This standard is presented using SI units. Use of units other than SI is allowed. However, if other units are used, the performance of a units
conversion check of the calculations should be included as a part of the calculations.
1.3 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice
D6026.
1.3.1 Two test methods are provided in this standard. The methods differ in equipment, the size of the specimen (mass) required
and the significant digits reported.
1.3.2 The procedures used to specify how data are collected/recorded or calculated in this standard are regarded as the industry
standard. In addition, they are representative of the significant digits that generally should be retained. The procedures used do not
consider material variation, purpose for obtaining the data, special purpose studies, or any considerations for the user’s objectives;
and it is common practice to increase or reduce significant digits of the reported data to be commensurate with these considerations.
It is beyond the scope of this standard to consider significant digits used in analysis methods for engineering design.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.5 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.
2. Referenced Documents
2
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
D3740 Practice for Minimum Requirements for Agencies Engaged in Testing and/or Inspection of Soil and Rock as Used in
Engineering Design and Construction
D4753 Guide for Evaluating, Selecting, and Specifying Balances and Standard Masses for Use in Soil, Rock, and Construction
Materials Testing
D6026 Practice for Using Significant Digits in Geotechnical Data
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E145 Specification for Gravity-Convection and Forced-Ventilation Ovens
1
These test methods are under the jurisdiction of ASTM Committee D18 on Soil and Rock and are the direct responsibility of Subcommittee D18.21 on Groundwater
and Vadose Zone Investigations.
Current edition approved May 1, 2010Feb. 1, 2019. Published June 2010February 2019. Originally approved in 2010. Last previous edition approved in 2018 as
D7626–10(2018). DOI: 10.1520/D7626-10.10.1520/D7626-19.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7626 − 19
3. Terminology
3.1 Definitions—For common definitions of common technical terms in this standard, refer to Terminology D653.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 base clay, n—an untreated naturally occurring clay (e.g., (for example, bentonite, kaolinite).
3.2.2 initial mass loss, n—the amount of water and residual organic compound not
...
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