Standard Historical Last Updated: Sep 16, 2013 Track Document
ASTM C673-97(2008)

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

Standard Classification of Fireclay and High-Alumina Plastic Refractories and Ramming Mixes C0673-97R08 ASTM|C0673-97R08|en-US Standard Classification of Fireclay and High-Alumina Plastic Refractories and Ramming Mixes Standard new BOS Vol. 15.01 Committee C08
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Significance and Use

This classification defines a group of classes for use by those producing or purchasing fireclay and high-alumina plastic refractories and ramming mixes. Each class is limited by PCE, or alumina content, or both. This classification is frequently used as a specification when the properties shown in Table 1 are the only items specified.

TABLE 1 Classification of Fireclay and High-Alumina Plastic Refractories and Ramming Mixes

Class
PCE, min
Al 2O3,
%
High-duty31NRA
Super-duty32½NR
60 % alumina3557.6 to 62.5
65 % alumina35-3662.6-67.5
70 % alumina3667.6 to 72.5
80 % alumina3777.6 to 82.5
85 % aluminaNR82.6 to 87.5
90 % aluminaNR87.6 to 92.5
95 % aluminaNR92.6 to 97.5
100 % aluminaNR>97.5

A NR = not required.

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 C 181, while ramming mixes generally have less than 15 % workability by the same procedure.

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Details
Book of Standards Volume: 15.01
Developed by Subcommittee: C08.92
Pages: 2
DOI: 10.1520/C0673-97R08
ICS Code: 81.080