ASTM C544-03(2008)

Standard Test Method for Hydration of Dead Burned Magnesite or Periclase Grain

SIGNIFICANCE AND USE
This test method determines relative hydration resistance of magnesia grain.  
This test method is used in industry to evaluate grain samples and is used for specification purposes in some cases.  
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

• Status: Historical
• Publication Date: 29-Feb-2008
• ICS: 91.100.15 - Mineral materials and products
• Technical Committee: C08 - Refractories
• Drafting Committee: C08.04 - Chemical Behaviors

Relations

• Replaces: ASTM C544-03 - Standard Test Method for Hydration of Dead Burned Magnesite or Periclase Grain
• Effective Date: 01-Mar-2008
• Replaced By: ASTM C544-03(2013) - Standard Test Method for Hydration of Dead Burned Magnesite or Periclase Grain
• Effective Date: 01-Apr-2013

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
Designation: C544 − 03(Reapproved 2008)
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
1.1 This test method covers the measurement of the relative 4.2 Standard Sieves, ASTM No. 6 (3.35 mm), No. 12 (1.70
resistance of magnesia grain to hydration.
mm), No. 20 (850 µm), No. 40 (425 µm), and No. 50 (300 µm).
1.2 This standard does not purport to address all of the
NOTE 2—The equivalent Tyler Standard Series sieves described in Test
safety concerns, if any, associated with its use. It is the
Methods C92 may be substituted for the ASTM sieves.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Procedure
bility of regulatory limitations prior to use.
5.1 Remove the material retained on a No. 6 (3.35-mm)
2. Referenced Documents
sieve, and crush it to pass the No. 6 sieve to obtain the
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
Materials
5.2 Separate this sample into the following three fractions:
C456 Test Method for Hydration Resistance of Basic Bricks
Passing Sieve No. Retained on Sieve No.
and Shapes
6 (3.35 mm) 12 (1.70 mm)
C493 Test Method for Bulk Density and Porosity of Granu-
12 (1.70 mm) 20 (850 µm)
20 (850 µm) 40 (425 µm)
lar Refractory Materials by Mercury Displacement (Dis-
continued 2002) (Withdrawn 2002)
5.3 Prepare a 100-g specimen by using equal parts by
weight of the three sizes listed in 5.2.
3. Significance and Use
5.4 Add sufficient water to the autoclave to maintain 80 psi
3.1 This test method determines relative hydration resis-
(552 kPa) at 324°F (162°C) for the duration of each 5-h test,
tance of magnesia grain.
but not enough to permit contact with any of the specimens.
3.2 This test method is used in industry to evaluate grain
5.5 Place each weighed specimen in a No. 3 porcelain
samples and is used for specification purposes in some cases.
crucible, and cover with a loosely crimped piece of aluminum
3.3 Care must be taken in interpreting the data.
foil to protect the specimen from drip or condensate. Dry the
covered crucibles in a forced-air dryer at 220 to 230°F (105 to
4. Apparatus
110°C) for at least 2 h.
4.1 Autoclave, suitable for operation at 80 psi (552 kPa) at
324°F (162°C) and equipped with pressure- and temperature-
5.6 Place the preheated rack containing the specimens in the
measuring devices and safety equipment.
autoclave. Heat the autoclave with the pressure-release valve
open; after a steady flow of steam is obtained through the
This test method is under the jurisdiction of ASTM Committee C08 on valve, continue to purge for 3 min to remove all air, close the
Refractories and is the direct responsibility of Subcommittee C08.04 on Chemical
valve, and bring the autoclave to 80 psi (552 kPa) at 324°F
Behaviors.
(162°C) in a total time of 1 h. Maintain the autoclave at 80 6
Current edition approved March 1, 2008. Published March 2008. Originally
5 psi (552 6 35 kPa) and 324 6 4°F (162 6 2°C) for 5 h.
approved in 1964. Last previous edition approved in 2003 as C544 – 03. DOI:
10.1520/C0544-03R08.
2 5.7 Allow sufficient cooling to lower the autoclave to 20 to
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
30 psi (138 to 207 kPa) with the release valve closed, and then
Standards volume information, refer to the standard’s Document Summary page on
carefully open the relief valve to reduce the autoclave to
the ASTM website.
3 atmospheric pressure in a total time between 30 and 60 min.
The last approved version of this historical standard is referenced on
www.astm.org. Remove the specimens and dry to constant weight at 220 to
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
C544 − 03 (2008)
TABLE 1 Material Properties
230°F (105 to 110°C) in a forced-air dryer. Record the
individual specimen weight, G. Material Number 1234
Chemical Analysis (Calcined
5.8 PlaceeachspecimenwiththecoverandthepanonaNo.
Basis
...

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.
e1
Designation:C 544–92 (Reapproved 1998) Designation:C 544–03 (Reapproved 2008)
Standard Test Method for
Hydration of Dead Burned Magnesite or Periclase Grain
This standard is issued under the fixed designation C 544; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Editorial changes were made throughout in March 1998.
1. 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.
2. Referenced Documents
2.1 ASTM Standards:
C 92 Test Methods for Sieve Analysis and Water Content of Refractory Materials
C 357 Test Method for Bulk Density of Granular Refractory Materials
C 456 Test Method for Hydration Resistance of Basic Bricks and Shapes
C 493 Test Method for Bulk Density and Porosity of Granular Refractory Materials by Mercury Displacement (Discontinued
2002)
3. 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.
4. Apparatus
4.1 Autoclave, suitable for operation at 80 psi (552 kPa) at 324°F (162°C) and equipped with pressure- and temperature-
measuring devices and safety equipment.
NOTE 1—A suitable apparatus is shown in Fig. 1 of Test Method C 456.
4.2 Standard Sieves, ASTM No. 6 (3.35 mm), No. 12 (1.70 mm), No. 20 (850 µm), No. 40 (425 µm), and No. 50 (300 µm).
NOTE 2—The equivalent Tyler Standard Series sieves described in Test Methods C 92 may be substituted for the ASTM sieves.
5. Procedure
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 maximum
amount of coarse material. Recombine with the portion passing the No. 6 sieve, and screen the resultant sample to remove all
material passing a No. 40 (425-µm) sieve. If necessary, dry at 220 to 230°F (105 to 110°C).
5.2 Separate this sample into the following three fractions:
Passing Sieve No. Retained on Sieve No.
6 (3.35 mm) 12 (1.70 mm)
12 (1.70 mm) 20 (850 µm)
20 (850 µm) 40 (425 µm)
5.3 Prepare a 100-g specimen by using equal parts by weight of the three sizes listed in 5.2.
This test method is under the jurisdiction of ASTM Committee C-8 on Refractories and is the direct responsibility of Subcommittee C08.04 on Chemical Behaviors.
Current edition approved July 15, 1992. Published September 1992. Originally published as C544–64. Last previous edition C544–91.
This test method is under the jurisdiction of ASTM Committee C08 on Refractories and is the direct responsibility of Subcommittee C08.04 on Chemical Behaviors.
Current edition approved March 1, 2008. Published March 2008. Originally approved in 1964. Last previous edition approved in 2003 as C 544 – 03.
Annual Book of ASTM Standards, Vol 15.01.
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,[e-mail]ards
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.
C 544–03 (2008)
TABLE 1 Material Properties
Material Number 1234
Chemical Analysis (Calcined
Basis), %:
Silica (SiO ) 1.0 3.3 0.7 0.55
Alumina (Al O ) 0.5 1.7 0.2 0.2
2 3
Iron Oxide (Fe O ) 0.5 3.8 0.2 0.2
2 3
Chromic Oxide (Cr O ) . 2.2 . .
2 3
Lime (CaO) 3.0 11.0 0.7 2.2
Boron Oxide (B O ) . . . . . . 0.03 <0.01
2 3
Magnesia (MgO) 95.0 78.0 98.2 96.75
Total, % 100.0 100.0 100.0 99.9
Bulk Specific Gravity:
By Water Displacement . . 3.21 3.32
(ASTM C 357)
By Water Displacement . . 3.21 3.32
(ASTM C 357))
By Mercury Displacement 3.36 3.15 3.27 3.37
(ASTM C 493)
By Mercury Displacement 3.36 3.15 3.27 3.37
(ASTM C 493))
5.4 Add sufficient water to the autoclave to maintain 80 psi (552 kPa) at 324°F (162°C) for the duration of each 5-h test, but
not enough to permit contact with any of the specimens.
5.5 Place each weighed specimen in a No. 3 porcelain crucible, and cover with a loosely crimped piece of aluminum foil to
protect the specimen from drip or condensate. Dry the covered crucibles in a forced-air dryer at 220 to 230°F (105 to 110°C) for
at least 2 h.
TABLE 2 Repeatability and Reproducibi
...