APPLICATIONS OF FERROCEMENT IN FAST
Normally ferrocement water tanks
are constructed with straight
sides and rectangular of cubical
in shape. A novel spherical
shape has been constructed.
The weight of concrete ( ferrocement
mortar in this case) in this
6.4 mtr dia water tank is 16
tonnes and it holds water of
about 1,20,000 ltr ( thus the
concrete weight is only about
13 % of the weight of water.
Refer Photo 22.
A sphere is
a very exiting geometric form
and its unique properties make
it the most appropriate water
tank. For a given volume, a
sphere has a minimum surface
area compared to any other form,
i.e. more efficient use of construction
materials. A sphere has no sharp
edges or corners to lodge bacteria
and dirt. The tank is very easy
due to water pressure is maximum
at 0.6 depth ( from bottom)
and it goes no decreasing to
zero at the base of the tank.
On the contrary a rectangular
tank has maximum hoop tension
at the bottom. In the case of
underground tanks, the earth
pressure provides uniform compression
on the surface of tank to efficiently
balance the hoop tension resulting
from water pressure.
water tank in RCC or steel would
be very costly due to excessive
shuttering cost or sheet formation
cost. No shuttering is required
for ferrocement tank. Only temporary
supporting is required during
hardening of mortar.
for supply , return and overflow
and washout are placed within