A Complete Information About the much Awaited Technology that have to increase the use of post tensioning in India

1. Post-Tension
INDIA
Let's
Presentation By
T RAJKIRAN
B SASHI KIRAN
S R SAI
PRAMOD
R BHYRAVA

2. Contents:
• Introduction
• Prestressing
• Types of Pre-stressing
• Advantages of Post Tensioning
• Current situation in India
• Applications and Examples of PT constructions
• Conclusion

3. Introduction
• Present issues in India
Earthquake prone regions
Over-population
Soil condition
• Present Solutions
 Seismic isolators
 Innovation in foundation
• Do we have an alternative, effective alternative?

4. PRESTRESSING
• DEF: To introduce internal stresses to counteract the stresses that will result
from applied load.
• It can be used to produce beams, floors or bridges with a longer span than is
practical with ordinary reinforced concrete.

5. Types of PRESTRESSING
• There are two types of prestressing(tensioning)

6. Pre Tensioning

7. Contd.

8. Post Tensioning
• Post-tensioning is done at a project site and requires little
to no modifications of the same forming system that
would be used to construct non pre-stressed concrete.
• The systems used to post-tension concrete and masonry
consist of prestressing steel that is housed inside a duct or
sheath, which allows the prestressing steel to be placed
inside the typical job site formwork at the same time rebar
and other reinforcing is placed.

9. Equipments used:
1.Tendons

10. 2.Hydraulic Jack

11. 3.Wedges

12. Placement of Wedges

13. Tensioning of Tendons

14. Filling of Holes by Grouting

15. ADVANTAGES OF PT
• Crack control
• Economy
• Quality
• Faster Installation
• Controlling deflections
• More efficient

16. ADVANTAGES OF PT

17. ADVANTAGES OF PT

18. Usage Of PT
• First application have been conceived in 1933 in
France.
• Currently, 1000000’s of houses are constructed in
USA using PT.
• How far it is used in India?????

19. Current Situation
• Usage of ordinary RCC or pre tensioning concrete in
India are frequent.
• But what about POST TENSIONING?
• Can it serve better than ordinary RCC or pre
tensioning RCC?
Let’s see!!!

20. Advantages over ordinary RCC
• High seismic resilience
• Less consumption of concrete
• Stiffer Foundation
• Restressable
• Time reduction

21. Application of PT
• Slabs
• Residential buildings
• Foundations in houses
• Multipurpose buildings
• Tennis courts

22. Post Tensioned Constructions:
• San Francisco Public Utilities Commission
Headquarters
• 2201 Westlake/Enso
• Trump International Hotel & Tower

23. San Francisco Public Utilities
Commission Headquarters

25. Trump International Hotel & Tower

26. Conclusion
What we meant to say through
our presentation is that we need
to adapt much more innovative
and efficient ideas and
techniques so that being a Civil
Engineer we can serve much
better to our nation.