Apparatus: Mould shall consist of a metal frustum of cone having the following internal dimensions: Bottom diameter-20 cm Top diameter -10 cm Height -30 cm The mould shall be of a metal other than brass and aluminium of at least 1.6 mm (or 16 BG) thickness. The top and bottom shall be open and at right angles to the axis of the cone. The mould shall have a smooth internal surface. It shall be provided with suitable foot pieces and handles to facilitatelifting it from the moulded concrete test specimen in a vertical direction as required by the test. A mould provided with a suitable guide attachment may be used. Tamping rod shall be of steel or other suitable material 16 mm in diameter 60 mm long and rounded at one end. Procedure: The internal surface of the mould shall be thoroughly cleaned and free form superfluous moisture and any set concrete before commencing the tes...
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