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ASTM C456-93(2003)

(Test Method)

Standard Test Method for Hydration Resistance of Basic Bricks and Shapes

Standard Test Method for Hydration Resistance of Basic Bricks and Shapes

SIGNIFICANCE AND USE
This test method compares relative resistance to hydration of basic refractory brick and shapes in laboratory tests.  
This test method allows an estimate to be made of the relative potential for hydration.  
The test method is used in industry and in some cases it is used for specification purposes.  
The results must be carefully used as a means of predicting whether or not basic brick or shapes will hydrate under actual conditions of storage or service.
SCOPE
1.1 This test method covers measurement of the relative resistance of basic brick and shapes to hydration.  
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3  This standard does not purport to address all of the safety problems, 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
31-Oct-2003
ICS
81.080 - Refractories
Technical Committee
C08 - Refractories
Drafting Committee
C08.04 - Chemical Behaviors
Current Stage
Ref Project

Relations

Replaces
ASTM C456-93(1998) - Standard Test Method for Hydration Resistance of Basic Bricks and Shapes
Effective Date
01-Nov-2003
Replaced By
ASTM C456-93(2008) - Standard Test Method for Hydration Resistance of Basic Bricks and Shapes
Effective Date
01-Mar-2008
Referred By
ASTM C544-18 - Standard Test Method for Hydration of Dead-Burned Magnesite or Periclase Grain
Effective Date
01-Nov-2003
Referred By
ASTM C71-12(2018) - Standard Terminology Relating to Refractories
Effective Date
01-Nov-2003

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ASTM C456-93(2003) - Standard Test Method for Hydration Resistance of Basic Bricks and ShapesASTM C456-93(2003) - Standard Test Method for Hydration Resistance of Basic Bricks and Shapes
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ASTM C456-93(2003) - Standard Test Method for Hydration Resistance of Basic Bricks and Shapes
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:C 456–93 (Reapproved 2003)
Standard Test Method for
Hydration Resistance of Basic Bricks and Shapes
This standard is issued under the fixed designation C 456; 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.
1. Scope
1.1 This test method covers measurement of the relative
resistance of basic brick and shapes to hydration.
1.2 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
information only.
1.3 This standard does not purport to address all of the
safety problems, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
2. Significance and Use
2.1 This test method compares relative resistance to hydra-
tion of basic refractory brick and shapes in laboratory tests.
2.2 This test method allows an estimate to be made of the
relative potential for hydration.
2.3 The test method is used in industry and in some cases it
is used for specification purposes.
2.4 The results must be carefully used as a means of
predicting whether or not basic brick or shapes will hydrate
under actual conditions of storage or service.
3. Apparatus
FIG. 1 Suitable Apparatus for Measuring Hydration Resistance of
3.1 Autoclave, suitable for operation at 80 psi (552 kPa) at
Basic Brick and Shapes (See )
324°F (162°C), and equipped with pressure- and temperature-
measuring devices, and safety equipment. Fig. 1 is illustrative
5. Procedure
of a suitable, commercially available apparatus.
5.1 Dry the test specimens to constant weight at 220 to
230°F (105 to 110°C) in a forced-air drier.
4. Test Specimens
5.2 Add sufficient water to the autoclave to maintain 80 psi
4.1 The test specimens shall be 1-in. (25-mm) cubes cut
(552 kPa) at 324°F (162°C) for the duration of each 5-h test,
from the interior of basic refractory brick or shapes so that no
but not enough to permit contact with any of the specimens.
original surfaces are present. Only one specimen shall be cut
5.3 Place each specimen in a lidless No. 2 porcelain
from each of five bricks or shapes.
crucible, and place the crucible in the autoclave on a suitable
rack to protect the specimen from drip or condensate (Fig. 2).
5.4 Heat the autoclave with the pressure release valve open;
This test method is under the jurisdiction of ASTM Committee C08 on
after a steady flow of steam is obtained through the valve,
Refractories and is the direct responsibility of Subcommittee C08.04 on Chemical
Behaviors.
continue to purge for 3 min to remove all air, close the valve,
Current edition approved November 1, 2003. Published January 2004. Originally
and bring the autoclave to 80 psi (552 kPa) and at 324°F
approved in 1960. Last previous edition approved in 1998 as C 456 – 93 (1998).
(162°C) in a total time of 1 h. Maint
...

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