Chapter 9 Flashcards
1
Q
Precast concrete construction
A
- Cast in manufacturing yard and fixed in position on site
- Normally cast in steel moulds
- More stringent dimensional precision is required
2
Q
Cast-in-situ
A
- Casting and fixing at the exact position on the construction site
- Usually cast in timber moulds
- Less critical in dimensional precision
3
Q
Types of movement joints
A
- Contraction joint
- Expansion joint
- Sliding joint
- Settlement joint
4
Q
Classification of joints in precast concrete
A
- Tension joint
- Compression joint
- Shear joint
5
Q
Advantages of precast concrete
A
- Faster construction speed
- Dimensional deviation is small
- Better quality control
6
Q
Limitations of precast concrete
A
- Tolerances must be allowed for
- Distance between precast yard and site will affect costing of project
- Accessibility, storage area and capacity of crane will affect erection process on site
7
Q
Manufacturing stage
A
- Mould fabrication
- Casting and curing of concrete
- Storage of precast components
- Delivery of components
8
Q
Erection stage
A
- Temporary storage in site
- Putting up the components
- Temporary support
- Fixing of joints
