Clean the standard cube moulds, 6 Nos., thoroughly and
tighten all the nut-bolts properly.
Apply oil to all contact surfaces of the mould.
Size of the mould is normally 150 mm x 150 mm x 150
mm.
While concreting take random samples from the mix in a
ghamela (pan).
Pour concrete in the cubes in 3 layers.
Compact each layer with 35 Nos. of strokes with the
tamping rod.
Finish the top surface by thapi/trowel after
compaction of the last layer.
Cover the mould by a damp Hessian cloth immediately to
prevent loss of water.
Each specimen should be taken from different locations
of the proposed concreting.
After 24 hours, remove the specimen from the mould.
While removing, take care to avoid breaking of the edges.
Code the cubes with paint or marker. Coding should be
self explanatory, showing the site name, concrete location, building no. and
the date of casting.
Submerge the specimen in clean, fresh water until the
time of testing.
Test three specimens for 7 days and three specimens
for 28 days curing.
