ASTM C544-03(2013)
(Test Method)Standard Test Method for Hydration of Dead Burned Magnesite or Periclase Grain
Standard Test Method for Hydration of Dead Burned Magnesite or Periclase Grain
SIGNIFICANCE AND USE
3.1 This test method determines relative hydration resistance of magnesia grain.
3.2 This test method is used in industry to evaluate grain samples and is used for specification purposes in some cases.
3.3 Care must be taken in interpreting the data.
SCOPE
1.1 This test method covers the measurement of the relative resistance of magnesia grain to hydration.
1.2 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.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: C544 − 03 (Reapproved 2013)
Standard Test Method for
Hydration of Dead Burned Magnesite or Periclase Grain
This standard is issued under the fixed designation C544; 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 1—Asuitable apparatus is shown in Fig. 1 of Test Method C456.
1. Scope
4.2 Standard Sieves, ASTM No. 6 (3.35 mm), No. 12 (1.70
1.1 This test method covers the measurement of the relative
mm), No. 20 (850 µm), No. 40 (425 µm), and No. 50 (300 µm).
resistance of magnesia grain to hydration.
1.2 This standard does not purport to address all of the
NOTE 2—The equivalent Tyler Standard Series sieves described in Test
Methods C92 may be substituted for the ASTM sieves.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
5. Procedure
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
5.1 Remove the material retained on a No. 6 (3.35-mm)
sieve, and crush it to pass the No. 6 sieve to obtain the
2. Referenced Documents
maximum amount of coarse material. Recombine with the
2.1 ASTM Standards:
portionpassingtheNo.6sieve,andscreentheresultantsample
C92 Test Methods for Sieve Analysis and Water Content of
to remove all material passing a No. 40 (425-µm) sieve. If
Refractory Materials
necessary, dry at 220 to 230°F (105 to 110°C).
C357 Test Method for Bulk Density of Granular Refractory
5.2 Separate this sample into the following three fractions:
Materials
Passing Sieve No. Retained on Sieve No.
C456 Test Method for Hydration Resistance of Basic Bricks
6 (3.35 mm) 12 (1.70 mm)
and Shapes
12 (1.70 mm) 20 (850 µm)
20 (850 µm) 40 (425 µm)
C493 Test Method for Bulk Density and Porosity of Granu-
lar Refractory Materials by Mercury Displacement (Dis-
5.3 Prepare a 100-g specimen by using equal parts by
continued 2002) (Withdrawn 2002)
weight of the three sizes listed in 5.2.
5.4 Add sufficient water to the autoclave to maintain 80 psi
3. Significance and Use
(552 kPa) at 324°F (162°C) for the duration of each 5-h test,
3.1 This test method determines relative hydration resis-
but not enough to permit contact with any of the specimens.
tance of magnesia grain.
5.5 Place each weighed specimen in a No. 3 porcelain
3.2 This test method is used in industry to evaluate grain
crucible, and cover with a loosely crimped piece of aluminum
samples and is used for specification purposes in some cases.
foil to protect the specimen from drip or condensate. Dry the
3.3 Care must be taken in interpreting the data.
covered crucibles in a forced-air dryer at 220 to 230°F (105 to
110°C) for at least 2 h.
4. Apparatus
5.6 Place the preheated rack containing the specimens in the
4.1 Autoclave, suitable for operation at 80 psi (552 kPa) at
autoclave. Heat the autoclave with the pressure-release valve
324°F (162°C) and equipped with pressure- and temperature-
open; after a steady flow of steam is obtained through the
measuring devices and safety equipment.
valve, continue to purge for 3 min to remove all air, close the
valve, and bring the autoclave to 80 psi (552 kPa) at 324°F
This test method is under the jurisdiction of ASTM Committee C08 on
(162°C) in a total time of 1 h. Maintain the autoclave at 80 6
Refractories and is the direct responsibility of Subcommittee C08.04 on Chemical
5 psi (552 6 35 kPa) and 324 6 4°F (162 6 2°C) for 5 h.
Behaviors.
Current edition approved April 1, 2013. Published August 2013. Originally
5.7 Allow sufficient cooling to lower the autoclave to 20 to
approved in 1964. Last previous edition approved in 2008 as C544 – 03 (2008).
30 psi (138 to 207 kPa) with the release valve closed, and then
DOI: 10.1520/C0544-03R13.
carefully open the relief valve to reduce the autoclave to
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
atmospheric pressure in a total time between 30 and 60 min.
Standards volume information, refer to the standard’s Document Summary page on
Remove the specimens and dry to constant weight at 220 to
the ASTM website.
3 230°F (105 to 110°C) in a forced-air dryer. Record the
The last approved version of this historical standard is referenced on
www.astm.org. individual specimen weight, G.
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C544 − 03 (2013)
TABLE 1 Material Properties
5.8 PlaceeachspecimenwiththecoverandthepanonaNo.
50 (300-µm) sieve, and screen according to Test Meth
...
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