Chapter 10 Flashcards
1
Q
Advantages of prestressing
A
- Increase in durability
- Full section is utilised
- Increase in shear capacity
2
Q
Limitations of prestressing
A
- Use of high strength materials is costly
- Additional cost in auxiliary equipment
- Need for quality control and inspection
3
Q
Describe Pre-tensioned concrete
A
- Tendons stressed between abutments
- Concrete cast and cured
- Tendons released and prestress transferred
4
Q
Pre-tensioned concrete can be
A
- Lintels
- Beams
- Floor slabs
5
Q
Describe Bonded Post-tensioned concrete
A
- Concrete cast and cured
- Tendons stressed and prestress transferred
- Tendons anchored and subsequently grouted
6
Q
Describe Unbonded Post-tensioned concrete
A
- Tendon coated with grease and covered by plastic sheathing
- Tension transferred through steel cable acting against steel anchors
- Main disadvantage: Cable can destress itself and burst out of the slab if damaged
