Containers for Mortar Specimens—The containers shall
be rigid, watertight, nonabsorptive, free of oil or grease, and either cylindrical or rectangular in cross section. Mortar
surface area shall be provided for ten undisturbed readings of
penetration resistance in accordance with clear distance requirements
specified in Procedure. The lateral dimension shall
be at least 6 in. [150 mm] and the height at least 6 in. [150