Standard : BS4551-1
This is used for measuring the workability of pozzolana and also cement mortar and hydrated lime.
It consists of a machined brass/ Steel table top 300 mm dia +-2.5 mm dia. Mounted on a rigid stand. The table top is reinforced with equally disposed of ribs and allowed to conical brass mould 100 mm ID. Top dia and 50 mm high. Tabletop with cement sample is allowed to fall from a height of 12 mm by means of a cam.