Precast concrete

Question 1

Name the differences between in-situ and precast

Answer 1

Uncontrolled environment vs controlled
Lengthy construction vs rapid
Multistage vs Single stage casting
Lacking quality vs high quality
Inefficient reuse of materials vs Minimal requirements for temporary support
Unskilled vs skilled labor force

Question 2

What are the social and environmental benefits of precast ?

Answer 2

Prafab is carried out away from residential areas reducing noise and pollution in those areas
More economical use of concrete implies less cement is produced
Effective transfer of skills amongst work force results in enhanced workforce

Question 3

What are the limitations of precast ?

Answer 3

Limitations on floor system layout
Transportation considerations
Special attention required for joints
More complex connections with pre-stressed systems