Question

I need apower point about presstressed concrete& and please will be clear , thanks so mutch.

Answer 1

Answer-

Some facts of prestressed concretePrestressed

concrete is of two type one is Pre-tentioning and another is post- tentioning

Pre-tentioning

in pre-tentioning the stressing wires Or tendons are stressed prior to placing concrete

post-tentioning

in post tentioning the wires or tendons are stressed and each end is anchored to concrete section after has been cast and has attained sufficient strength.

​​​​The following are key points about prestressed concrete

1. It is more durable than reinforced concrete
2. the size of structure is reduce as compare to reinforced concrete
3. prestressed concrete utilize maximum tention and compression of concrete.
4. prestressed concrete is more economical as compare to reinforced concrete
5. prestressed concrete can be used in long spans as the section of member can be reduced.
6. prestressed member is free from crack.
7. prestressed section is lighter so they can be transported easily.
8. the concrete diagonal tension can be reduced by using prestressed concrete
9. shear resistance increased by using curved tendons.
10. the major problem with prestressed concrete is strict supervision and skilled labour is required with strong technical knowledge.
11. in prestressed concrete advance advance construction Machineries like jacks Anchorage.