ASTM C24

Standard Test Method for Pyrometric Cone Equivalent (PCE) of Fireclay and High Alumina Refractory Materials

Compares the deformation of prepared cone specimens with Orton PCE test cones. Indicate approximate cone value anticipated or describe material. A representative sample of 150 gm or more of granular material to pass a No. 70 ASTM Sieve (No. 65 Tyler) should be submitted.

One specimen up to cone 36: $400 per test
Two specimens in one firing, within 3 cone numbers, up to cone 36: $520 per test
One specimen up to cone 38: $485
Two specimens in one firing, within 3 cone numbers, up to cone 38: $600

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SIGNIFICANCE AND USE

The deformation and end point of a cone corresponds to a certain heat-work condition due to the effects of time, temperature, and atmosphere. The precision of this test method is subject to many variables that are difficult to control.

Therefore, an experienced operator may be necessary where PCE values are being utilized for specification purposes.

PCE values are used to classify fireclay and high alumina refractories. This is an effective method of identifying fireclay variations, mining control, and developing raw material specifications.

Although not recommended, this test method is sometimes applied to materials other than fireclay and high alumina. Such practice should be limited to in-house laboratories and never be used for specification purposes.

1. SCOPE

1.1 This test method covers the determination of the Pyrometric Cone Equivalent (PCE) of fire clay, fireclay brick, high alumina brick, and silica fire clay refractory mortar by comparison of test cones with standard pyrometric cones under the conditions prescribed in this test method.

1.2 Units - The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.

1.2.1 Exceptions - Certain weights are in SI units with inch-pound in parenthesis. Also, certain figures have SI units without parenthesis. These SI units are to be regarded as standard.

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.

1.1 This test method covers the determination of the Pyrometric Cone Equivalent (PCE) of fire clay, fireclay brick, high alumina brick, and silica fire clay refractory mortar by comparison of test cones with standard pyrometric cones under the conditions prescribed in this test method.

COPYRIGHT NOTICE

Extracted, with permission, from ASTM C24 Standard Test Method for Pyrometric Cone Equivalent (PCE) of Fireclay and High Alumina Refractory Materials, copyright ASTM International, 100 Barr Harbor Drive, West Conshohocken, PA 19428. A copy of the standard may be purchased from ASTM International, phone 610-832-9555, e-mail: service@astm.org, website: www.astm.org.

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