ASTM C673-97

Standard Classification of Fireclay and High-Alumina Plastic Refractories and Ramming Mixes

SCOPE
1.1 This classification covers fireclay and high-alumina plastic refractories and ramming mixes that can be pounded or rammed into place to form a monolithic structure. The terms "plastic" and "ramming mix" are generally intended to describe the workability of the material. In this regard, plastics are considered to be materials having a workability index of more than 15% in accordance with Test Method C181, while ramming mixes generally have less than 15% workability by the same procedure.

General Information

• Status: Historical
• Publication Date: 09-Nov-1997
• Technical Committee: C08 - Refractories
• Drafting Committee: C08.92 - The Joseph E. Kopanda Subcommittee for Editorial, Terminology and Classification

Relations

• Replaced By: ASTM C673-97(2003) - Standard Classification of Fireclay and High-Alumina Plastic Refractories and Ramming Mixes
• Effective Date: 10-Apr-2003
• Referred By: ASTM C1054-18 - Standard Practice for Pressing and Drying Refractory Plastic and Ramming Mix Specimens
• Effective Date: 10-Nov-1997

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C 673 – 97
Standard Classification of
Fireclay and High-Alumina Plastic Refractories and
Ramming Mixes
This standard is issued under the fixed designation C 673; 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.
TABLE 1 Classification of Fireclay and High-Alumina Plastic
1. Scope
Refractories and Ramming Mixes
1.1 This classification covers fireclay and high-alumina
plastic refractories and ramming mixes that can be pounded or
Class PCE, min Al O ,
2 3
%
rammed into place to form a monolithic structure. The terms
A
“plastic” and“ ramming mix” are generally intended to de- High-duty 31 NR
Super-duty NR
scribe the workability of the material. In this regard, plastics
32 |n$
are considered to be materials having a workability index of
60 % alumina 35 57.6 to 62.5
more than 15 % in accordance with Test Method C 181, while
65 % alumina 35-36 62.6-67.5
ramming mixes generally have less than 15 % workability by
70 % alumina 36 67.6 to 72.5
80 % alumina 37 77.6 to 82.5
the same procedure.
85 % alumina NR 82.6 to 87.5
90 % alumina NR 87.6 to 92.5
2. Referenced Documents
95 % alumina NR 92.6 to 97.5
100 % alumina NR >97.5
2.1 ASTM Standards:
A
C 24 TestMethodforPyrometricConeEquivalent(PCE)of NR = not required.
Fireclay and High-Alumina Refractory Materials
C 181 Test Method for Workability Index of Fireclay and
4.2 High-alumina plastic refractories and ramming mixes
High-Alumina Plastic Refractories
are divided into eight different classifications: (1) 60 % alu-
NOTE 1—Chemical analysis of refractory products are determined by a
mina, (2) 65 % alumina, (3) 70 % alumina, (4) 80 % alumina,
combination of x-ray fluorscence (XRF) and inductively coupled plazma
(5) 85 % alumina, (6) 90 % alumina, (7) 95 % alumina, and (8)
(ICP) using standard reference materials (SRM); including various types
100 % alumina.
of minerals and refractory materials which are available from the National
Institute of Standards and Technology and other appropriate sources.
5. Basis of Classification
5.1 The properties required for compliance with a particular
3. Significance and Use
classification are shown in Table 1.
3.1 This classification defines a group of classes for use by
those producing or purchasing fireclay and high-alumina plas-
6. Test Methods
tic refractories and ramming mixes. Each class is limited by
6.1 The determination of aluminum oxide (Al O )onan
2 3
PCE, or alumina content, or both. This classification is fre-
ignition-free basis, as required by this classification, as deter-
quently used as a specification when the properties shown in
mined by XRF and ICP.
Table 1 are the only items specified.
6.2 The determination of
...