a) The concreting area should be clean and free from
any loose binding wire, nails, wooden pieces, soil etc.
b) The concreting labourers should walk only on
walkway stools (ghoddas), so that the laid steel does not get affected. Walkway ghoddas
should be of 230 mm width and 1500 mm in length.
c) Concrete should not take more than ten minutes from
the time it is discharged from the mixer drum to its final placing point.
d) The person who finally places the concrete into the
members should function as a 'MAAL DALNEWALLA' (material placer) and not 'MAAL
FEKANEWALLA' (material thrower).
e) Concrete should not be dropped from a height of
more than 1 meter. This will prevent segregation of the mix., which happens
when concrete is dropped from a height of more than 1 mt.
f) Concreting should be done in strips.
g) The width and length of the strip should be such
that the second strip for concreting starts within the setting time of the
first strip concrete.
h) If the concreting strip is not completed within the
setting time, (normally 30 minutes) to prevent COLD JOINT use Keep alive (ZINDA
RAKHO) procedure.
i) Zinda Rakho � Place 2 pans of concrete on the setting concrete,
and re-vibrate the drying surface, thereby extending the life of the
concrete.
j) No worker should be allowed to clean the 'ghamela'
of its loose material by banging on the slab. A special banging plate be kept
for the same.
