Kelly Ball Penetration Apparatus ASTM C-360
Used for estimation of workability of portland cement concrete in terms of depth of penetration of a hemispherical metal weight into the plastic concrete. Double of Kelly Ball reading indicates approximately the slump of the concrete tested.
The apparatus consists of the following :-
- A hemispherically shaped mild steel weight of approximately 14 kg with graduated handle.
- A stirrup frame which guides the h e m i s p h e r i c a l weight and also serves as datum or measuring penetration of the ball.