slump mold

slump cone

A mold in the form of a truncated cone with a base diameter of 8 in. (20 cm), top diameter 4 in. (10 cm), and height 12 in. (30 cm); used to fabricate a specimen of freshly mixed concrete for the slump test; a cone 6 in. (15 cm) high is used for tests of freshly mixed mortar and stucco.