Test Specimens
9.1 Preparation—The test specimens shall be right cylinders.
They may be formed and matured for the purpose of
compression testing, or they may be cut from matured whiteware
by sawing or coredrilling. The ends of all specimens shall
be ground or lapped to yield plane and parallel faces. These
faces shall be perpendicular to the axis of the specimen, and
parallel within 15 min of arc (0.044 rad).
9.2 Size—The size of the specimen should be no larger than
to require more than 80 % of the rated capacity of the testing
machine. Examples of specimen size limitations are shown in
Table 2.
9.3 Number of Specimens—The number of specimens shall
not be less than ten.