Advantages and Disadvantages Precast Cement Concrete Blocks Construction are
Advantages:
- The transport and storage of various components of concrete for cast-in-situ work are eliminated when pre-cast members are adopted.
- When pre-cast structures are to be installed, it is evident that the amount of scaffolding and formwork is considerably reduced.
- It is not necessary to provide joints in pre-cast construction.
- The moulds employed for preparing the pre-cast units are of steel with exact dimensions in all directions. These moulds are more durable and they can be used several times.
- Concrete of superior quality is produced as it is possible to have better technical control on the production of concrete in factory.
- The labour required in the manufacturing process of pre-cast units can easily be trained.
- The pre-cast structures can be dismantled, when required and they can be suitably used elsewhere.
- The pre-cast articles may be given the desired shape and finish with accuracy.
- The work can be completed in a short time, when pre-cast units are adopted. When pre-cast structures are to be installed, it is evident that the amount of scaffolding and formwork is considerably reduced.
Disadvantages:
- The economy achieved in pre-cast construction is partially balance by the amount to be spent in transport and handling of pre-cast members. It becomes, therefore, necessary to locate the pre-cast factory at such a place that transport and handling charges are brought down to the minimum possible extent.
- It becomes difficult to produce satisfactory connections between the pre-cast members.
- It is necessary to arrange for specific equipment for lifting and moving of pre-cast units.
- If not properly handled, the pre-cast units may be damaged during transport.
