Concrete cubes were cast in standard steel mould of dimensions 150 mm x 150 mm
x 150 mm according to the specifications defined in BS 8110 1997 [8]. Similarly plain
concrete prisms were cast in steel mould of dimensions 100 mm x100 mm x 500 mm.
Plain concrete planks of 40 mm x 400 mm x 400 mm dimensions were cast in wooden
moulds and 50mm diameter cores were drilled out for porosity measurement from the
planks.