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