ASTM C1039-85(2010)e1

Standard Test Methods for Apparent Porosity, Apparent Specific Gravity, and Bulk Density of Graphite Electrodes

SIGNIFICANCE AND USE
The results of these test methods can be used as a quality control or quality assurance check of electrodes either during their manufacture or at the user's location. The results of these methods tend to be operator-sensitive, therefore, care must be taken in the execution of the test in order to obtain reproducible results.
SCOPE
1.1 These test methods cover the determination of apparent porosity, apparent specific gravity, and bulk density of cores taken from graphite electrodes manufactured for use in electric arc furnaces. (See also C559 and C838.)
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 This standard does not purport to address 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.

General Information

• Status: Historical
• Publication Date: 30-Apr-2010
• ICS: 71.100.99 - Other products of the chemical industry
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.F0 - Manufactured Carbon and Graphite Products

Relations

• Replaces: ASTM C1039-85(2005) - Standard Test Methods for Apparent Porosity, Apparent Specific Gravity, and Bulk Density of Graphite Electrodes
• Effective Date: 01-May-2010
• Referred By: ASTM C781-20 - Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
• Effective Date: 01-May-2010
• Referred By: ASTM C1836-16(2023) - Standard Classification for Fiber Reinforced Carbon-Carbon Composite Structures
• Effective Date: 01-May-2010
• Referred By: ASTM C1783-15 - Standard Guide for Development of Specifications for Fiber Reinforced Carbon-Carbon Composite Structures for Nuclear Applications
• Effective Date: 01-May-2010
• Referred By: ASTM C783-85(2020) - Standard Practice for Core Sampling of Graphite Electrodes
• Effective Date: 01-May-2010
• Referred By: ASTM D6354-23 - Standard Guide for Sampling Plan and Core Sampling of Carbon Cathode Blocks Used in Aluminum Production
• Effective Date: 01-May-2010
• Referred By: ASTM C1793-15 - Standard Guide for Development of Specifications for Fiber Reinforced Silicon Carbide-Silicon Carbide Composite Structures for Nuclear Applications
• Effective Date: 01-May-2010
• Referred By: ASTM C1835-16(2023) - Standard Classification for Fiber Reinforced Silicon Carbide-Silicon Carbide (SiC-SiC) Composite Structures
• Effective Date: 01-May-2010

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
´1
Designation:C1039 −85(Reapproved 2010) An American National Standard
Standard Test Methods for
Apparent Porosity, Apparent Specific Gravity, and Bulk
Density of Graphite Electrodes
This standard is issued under the fixed designation C1039; 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 editorially in May 2010.
1. Scope 4. Apparatus
1.1 These test methods cover the determination of apparent 4.1 Drying Oven.
porosity, apparent specific gravity, and bulk density of cores
4.2 Analytical Balance, capable of weighing to 0.1 g.
taken from graphite electrodes manufactured for use in electric
4.3 Autoclave or Pressure Vessel, capable of withstanding
arc furnaces. (See also C559 and C838.)
one atmosphere externally and designed to withstand at least
1.2 The values stated in SI units are to be regarded as
448 to 483 kPa internal pressure.
standard. No other units of measurement are included in this
4.3.1 The pressure vessel shall be provided with an opentop
standard.
container to hold the specimens and a means of introducing
1.3 This standard does not purport to address the safety
water around the specimens while specimens are being held at
concerns, if any, associated with its use. It is the responsibility
low pressure.
of the user of this standard to establish appropriate safety and
4.4 Vacuum Pump.
health practices and determine the applicability of regulatory
4.5 Wire Loop, Halter or Stirrup, fabricated with 22 AWG
limitations prior to use.
(9.643 mm) copper wire shall be provided for determining
suspended weight.
2. Referenced Documents
4.6 Smooth Linen or Cotton Cloth.
2.1 ASTM Standards:
C559 Test Method for Bulk Density by Physical Measure-
5. Test Specimens and Sampling
ments of Manufactured Carbon and Graphite Articles
C783 Practice for Core Sampling of Graphite Electrodes
5.1 Electrodes can be sampled using Practice C783 that
C838 Test Method for Bulk Density of As-Manufactured
result in a specimen with approximately 50 mm diameter and
Carbon and Graphite Shapes
191 mm long or a specimen of equivalent volume.
5.2 If sizes and shapes which are different from those
3. Significance and Use
described in 5.1, these shall be included in the report.
3.1 Theresultsofthesetestmethodscanbeusedasaquality
5.3 For each test, select at least five electrodes, at random,
control or quality assurance check of electrodes either during
to represent a lot.The lot size will be determined by agreement
their manufacture or at the user’s location. The results of these
of the parties desiring the tests.
methods tend to be operator-sensitive, therefore, care must be
takenintheexecutionofthetestinordertoobtainreproducible
6. Calibration
results.
6.1 Prior to obtaining the suspended weights of the
specimens, the balance shall be adjusted to zero with the wire
stirrup suspended from the balance and immersed into a
These test methods are under the jurisdiction of ASTM Committee D02 on
container of the liquid to the same depth in the liquid as occurs
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee
D02.F0 on Manufactured Carbon and Graphite Products.
when a specimen is in place.
Current edition approved May 1, 2010. Published November 2010. Originally
approvedin1985.Lastpreviouseditionapprovedin2005asC1039–85(2005).DOI:
7. Procedure
10.1520/C1039-85R10E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
7.1 Determinations of Dry Weight, D:
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.1.1 Dry the test specimens to constant weight by heating
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. to 100 to 110°C. Cool and determine the dry weight, D,in
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C1039−85 (2010)
grams to the nearest 0.1 g. If the time between drying and
S = suspended weight, g.
weighing exceeds 8 h, the specimens must be stored in a
NOTE 2—This assumes that one cubic centimetre of water weighs 1 g.
desiccator. This is true within about 3 parts in 1000 for water at 20 to 25°C.
7.1.2 The determination of dry weight may be done either
8.2 Volume of Open Pores—Obtain the volume of open
before or after the saturation operation. If the specimen is
pores by subtracting the dry weight, D, from the saturated
friable or there is evidence that particles have broken loose
weight, W.
during the saturation operation, the dry weight shall be
Volume of open pores, cm 5 W 2 D (2)
obtained after the suspended and saturated weights have been
8.3 Volume of Impervious Portion—Obtain the volume of
determined. Drying as described in 7.1.1 must be carried out.
impervious portion by subtracting the suspended weight, S,
7.2 Saturation:
from the dry weight, D.
7.2.1 Using the pressure vessel described in 4.3, place the
Volume of impervious portion, cm 5 D 2 S (3)
specimens in the open-top container inside the vessel. Close
and seal the vessel and pump down at least to 133 Pa (1 mm
8.4 Apparent Porosity, P—The apparent porosity, P,is
Hg) and maintain this pressure for 30 min.
expressed as a percentage of
...