2. Prestressing is a method of applying
precompression to concrete and pretension
to steel wires
Prestressing Is done by using hydraulic jacks
In this method high strength steel (1500-
2000 mpa ) and concrete (35-200 mpa) is
used .
Full material strength of both steel and
concrete is utilised by this method
3. Deflection is minimised
Ideal for long spans
The cross section of members are reduced
due to higher grade materials
This will results in reduction of self weight of
the structure
Finally the structural behaviour is good and
and design of foundation is easy and
economical
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23. Expansive cement is used for construction
The extension in length takes place after
final setting
The prestressing is done automatically by
this method
