ASTM C974-87(2015)
(Practice)Standard Practice for Preparing Test Specimens from Basic Refractory Castable Products by Casting
Standard Practice for Preparing Test Specimens from Basic Refractory Castable Products by Casting
SIGNIFICANCE AND USE
2.1 This practice defines a procedure that ensures consistent preparation of specimens for product testing and evaluation.
2.2 This practice can be used in the laboratories of producers, users, and general-interest parties for research and development or quality-control work. It is particularly useful for interlaboratory comparisons or products, for repetitive evaluations or comparisons of products or product quality, and in specifying a uniform preparation practice for specimens for acceptance testing.
2.3 In using this practice it must be recognized that the structure of laboratory-cast specimens may differ significantly from the structure of material cast in field applications.
SCOPE
1.1 This practice covers a procedure for preparing test specimens from a basic refractory castable by casting prepared material in a mold. Specimens prepared in accordance with this procedure are intended for use in ASTM test methods.
1.2 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.
1.3 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.
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Designation: C974 − 87 (Reapproved 2015)
Standard Practice for
Preparing Test Specimens from Basic Refractory Castable
1
Products by Casting
This standard is issued under the fixed designation C974; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3.3 Vibration Table, spring or air-cushioned, with a pneu-
2
matic or electric driver.
1.1 This practice covers a procedure for preparing test
3.4 Oven, air circulating.
specimens from a basic refractory castable by casting prepared
material in a mold. Specimens prepared in accordance with this
4. Procedure
procedure are intended for use in ASTM test methods.
4.1 Store the material to be tested at 85 6 2°F (29.5 6 1°C)
1.2 The values stated in inch-pound units are to be regarded
for 24 h prior to testing.
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
4.2 Reduce the sample to the desired batch size with a
and are not considered standard.
sample splitter or by quartering, taking precautions to prevent
segregation. Sufficient material should be batched to provide at
1.3 This standard does not purport to address all of the
least a 10 % excess over test specimen requirements.
safety problems, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4.3 Add the weighed, dry batch to the mixer and dry-mix at
priate safety and health practices and determine the applica-
low speed for 30 s. Continue to mix at low speed while adding
bility of regulatory limitations prior to use.
the required amount of water (see 4.3.1) within 30 s. Wet-mix
at low speed for 4 min.
2. Significance and Use
4.3.1 Use the amount of water and mixing time (if different
from above) recommended by the manufacturer. The water
2.1 This practice defines a procedure that ensures consistent
must be potable and at a temperature of 85 6 2°F (29.5 6
preparation of specimens for product testing and evaluation.
1°C). Measure the water addition to the nearest 0.1 % by
2.2 This practice can be used in the laboratories of
weight.
producers, users, and general-interest parties for research and
4.4 Specimens should be cast in a mold immediately after
development or quality-control work. It is particularly useful
the batch is mixed so that all specimens made from a batch are
for interlaboratory comparisons or products, for repetitive
cast at the same time. The mold should be securely clamped to
evaluations or comparisons of products or product quality, and
thevibrationtabletop.Fillthemoldtooverflowingdistributing
in specifying a uniform preparation practice for specimens for
the material uniformly between each cavity. Vibrate in accor-
acceptance testing.
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C974 − 87 (Reapproved 2009) C974 − 87 (Reapproved 2015)
Standard Practice for
Preparing Test Specimens from Basic Refractory Castable
1
Products by Casting
This standard is issued under the fixed designation C974; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This practice covers a procedure for preparing test specimens from a basic refractory castable by casting prepared material
in a mold. Specimens prepared in accordance with this procedure are intended for use in ASTM test methods.
1.2 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.
1.3 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.
2. Significance and Use
2.1 This practice defines a procedure that ensures consistent preparation of specimens for product testing and evaluation.
2.2 This practice can be used in the laboratories of producers, users, and general-interest parties for research and development
or quality-control work. It is particularly useful for interlaboratory comparisons or products, for repetitive evaluations or
comparisons of products or product quality, and in specifying a uniform preparation practice for specimens for acceptance testing.
2.3 In using this practice it must be recognized that the structure of laboratory-cast specimens may differ significantly from the
structure of material cast in field applications.
3. Apparatus
3.1 Mixer, bench-type, Hobart or equivalent.
3.2 Steel Molds.
2
3.3 Vibration Table, spring or air-cushioned, with a pneumatic or electric driver.
3.4 Oven, air circulating.
4. Procedure
4.1 Store the material to be tested at 85 6 2°F (29.5 6 1°C) for 24 h prior to testing.
4.2 Reduce the sample to the desired batch size with a sample splitter or by quartering, taking precautions to prevent
segregation. Sufficient material should be batched to provide at least a 10 % excess over test specimen requirements.
4.3 Add the weighed, dry batch to the mixer and dry-mix at low speed for 30 s. Continue to mix at low speed while adding the
required amount of water (see 4.3.1) within 30 s. Wet-mix at low speed for 4 min.
4.3.1 Use the amount of water and mixing time (if different from above) recommended by the manufacturer. The water must
be potable and at a temperature of 85 6 2°F (29.5 6 1°C). Measure th
...
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