Answer / sjtbehera

Ferrocement is a composite material which is used in
building or sculpture with cement, sand, water and wire or
mesh material—often called a thin shell in North America.

Ferrocement has great strength and economy. It is
fireproof, earthquake safe and does not rust, rot or blow
down in storms. It has a broad range of applications which
include home building, creating sculptures, repair of
existing artifacts and building boats and ships.
The desired shape may be built from a multi-layered
construction of chicken wire or other steel mesh, and if
needed reinforced with steel wire or steel bars. Over this
finished framework, an appropriate mixture of cement, sand
and water is spread out. During hardening, the ferrocement
is kept moist, to ensure the cement is able to set and
harden.

The wall thickness of ferrocement constructions lies in
general between 10 and 30 mm (3/8 to 1-1/8 inch). Like
other applications of cement, a considerable amount of time
may be necessary for the material to fully cure and reach
its final strength. Curing time is dependent upon the span
or application load, and ferrocement can take a month
before it is ready for use. As the cement hydrates, it
becomes increasingly strong.


And OPC is Ordinary portland cement is used world wise
construnction.It is well known to everybody

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