This practice is useful for producing uniform specimens of refractory plastics and ramming mixes for use in standard ASTM tests. Samples thus formed may be used for referee testing when setting specifications between producer and user. Forming parameters such as sample size, workability, and forming pressure should be agreed upon and specified in the report when referee testing.

This practice is applicable for preparing test specimens of various sizes. Note that 9 by 4½ by 2½ in. (228 by 114 by 64-mm) samples, because of their large cross-section, have a greater tendency to form flaws during pressing, handling, and drying than smaller cross-sectional samples.

Other tests for which these specimens may be used encompass, but are not limited to, the following ASTM standards: Method C 16, Test Methods C 20, Test Method C 113, Test Methods C 133, Test Method C 179, Test Method C 288, Test Method C 417, Test Method C 577, Test Method C 583, Test Method C 704, Test Methods C 830, Test Method C 832, Practice C 874, Test Method C 885, and Test Method C 914.

A purpose of this practice is to minimize flaws in pressed specimens. It is not intended to duplicate all field installation conditions.

Variations in workability as determined by Test Method C 181 can significantly affect the number of flaws contained in a specimen. For comparison testing between two laboratories, the workability level should be established by mutual agreement.

This practice is not intended for preparing specimens of basic ramming mixes, anhydrous tap-hole mixes, nor resin bonded mixes.

1. Scope

1.1 This practice covers the pressing and drying of chemically and nonchemically bonded aluminum-silicate and high alumina plastic and ramming mix refractory specimens classified in accordance with Classification C 673.

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 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 (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C16 Test Method for Load Testing Refractory Shapes at High Temperatures

C20 Test Methods for Apparent Porosity, Water Absorption, Apparent Specific Gravity, and Bulk Density of Burned Refractory Brick and Shapes by Boiling Water

C113 Test Method for Reheat Change of Refractory Brick

C133 Test Methods for Cold Crushing Strength and Modulus of Rupture of Refractories

C179 Test Method for Drying and Firing Linear Change of Refractory Plastic and Ramming Mix Specimens

C181 Test Method for Workability Index of Fireclay and High-Alumina Refractory Plastics

C288 Test Method for Disintegration of Refractories in an Atmosphere of Carbon Monoxide

C417 Test Method for Thermal Conductivity of Unfired Monolithic Refractories

C577 Test Method for Permeability of Refractories

C583 Test Method for Modulus of Rupture of Refractory Materials at Elevated Temperatures

C673 Classification of Fireclay and High-Alumina Plastic Refractories and Ramming Mixes

C704 Test Method for Abrasion Resistance of Refractory Materials at Room Temperature

C830 Test Methods for Apparent Porosity, Liquid Absorption, Apparent Specific Gravity, and Bulk Density of Refractory Shapes by Vacuum Pressure

C832 Test Method of Measuring Thermal Expansion and Creep of Refractories Under Load

C874 Test Method for Rotary Slag Testing of Refractory Materials

C885 Test Method for Youngs Modulus of Refractory Shapes by Sonic Resonance

C914 Test Method for Bulk Density and Volume of Solid Refractories by Wax Immersion

Keywords

drying; forming; pressing; refractory plastics; refractory ramming mixes; Aluminum-silicate refractory specimens; Chemically-bonded refractory specimens; Drying or curing; Nonchemically-bonded refractory specimens; Pressing; Refractories (alumina); Refractories (plastic); Refractories (ramming mixes);

ICS Code

ICS Number Code 81.080 (Refractories)

Citing ASTM Standards

[Back to Top]