ASTM C838-96(2010)e1
(Test Method)Standard Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes
Standard Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes
SIGNIFICANCE AND USE
This test method provides a means of determining bulk density on as-manufactured logs, blocks, or shaped articles.
This test method is suitable for manufacturing control and acceptance specifications.
Test Method C559 may be used when a higher degree of accuracy is required.
SCOPE
1.1 This test method covers the determination of the density of as-manufactured carbon and graphite from measurements of mass and dimensions at room temperature.
1.2 This test method is applicable to boronated carbon and graphite.
1.3 This test method is not applicable to carbon- and graphite-containing materials that are thermally unstable at or below temperatures of 200°C.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.5 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 and health practices and determine the applicability of regulatory limitations prior to use.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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´1
Designation: C838 − 96(Reapproved 2010) An American National Standard
Standard Test Method for
Bulk Density of As-Manufactured Carbon and Graphite
Shapes
This standard is issued under the fixed designation C838; 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.
´ NOTE—Updated units of measurement throughout the standard editorially in May 2010.
1. Scope 4. Significance and Use
1.1 This test method covers the determination of the density 4.1 This test method provides a means of determining bulk
of as-manufactured carbon and graphite from measurements of density on as-manufactured logs, blocks, or shaped articles.
mass and dimensions at room temperature.
4.2 This test method is suitable for manufacturing control
1.2 This test method is applicable to boronated carbon and and acceptance specifications.
graphite.
4.3 Test Method C559 may be used when a higher degree of
1.3 This test method is not applicable to carbon- and accuracy is required.
graphite-containing materials that are thermally unstable at or
5. Test Specimens
below temperatures of 200°C.
5.1 Logs or Blocks—May be measured and weighed as-
1.4 The values stated in SI units are to be regarded as
manufactured or after rough ends have been squared by
standard. No other units of measurement are included in this
machining. The stock shall preferably have been indoors after
standard.
heattreatment;ifthereisdoubtthatthepieceisdry,weigh,dry,
1.5 This standard does not purport to address all of the
and reweigh it. Repeat, if necessary, until there is less than
safety concerns, if any, associated with its use. It is the
0.1 % weight loss. The drying temperature should be from 110
responsibility of the user of this standard to establish appro-
to 200°C.
priate safety and health practices and determine the applica-
5.2 Shaped Articles—Other than right circular cylinders or
bility of regulatory limitations prior to use.
rectangular parallelepipeds may be measured, and a correction
made for the cavities or protuberances if the specimen volume
2. Referenced Documents
can be determined within 0.5 % (see 6.2).
2.1 ASTM Standards:
C559 Test Method for Bulk Density by Physical Measure-
6. Procedure
ments of Manufactured Carbon and Graphite Articles
6.1 Logs or Blocks—Measure as-manufactured on the diam-
eter or cross section at two different locations, taking care to
3. Terminology
avoid distortions. Take four length measurements on cylinders
3.1 Definitions of Terms Specific to This Standard:
90° apart on the periphery of the circular end faces. On
3.1.1 bulk density, n—the mass of a unit volume including
rectangular pieces, make four length measurements, two each
both permeable and impermeable voids (and boron compounds
along opposite faces. Make additional measurements, if
in the case of boronated carbon or boronated graphite) present
needed, to determine a valid mean for each dimension. Make
in the material at room temperature.
dimensional and mass measurements with equipment accurate
to 0.5 %.
6.2 Shaped Articles—Make dimensional and mass measure-
This test method is under the jurisdiction of Committee D02 on Petroleum
ments with equipment accurate to 0.5 %.
Products and Lubricants and is the direct responsibility of Subcommittee D02.F0 on
Manufactured Carbon and Graphite Products.
Current edition approved May 1, 2010. Published May 2010. Originally
7. Calculation
approved in 1980. Last previous edition approved in 2005 as C838 – 96 (2005).
7.1 Calculate the bulk density as follows:
DOI: 10.1520/C0838-96R10E01.
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