Because precast concrete can be cast at ground level in factory conditions, it has these added features:
Better Finishes:
Better finishes can be obtained with precast concrete because the inside surface of the mould is kept in good condition.
There is no grout loss, such as that from badly fitting formwork, which results in poor quality concrete like shown below.
By careful selection of materials and finishing processes, a wide range of high quality finishes can be obtained.
No space needed on site for storing moulds and reinforcement:
Precast components are made in a factory and delivered to site where they are lifted straight from the lorry onto the building.
Faster erection at site:
Components are erected straight from the delivery lorry. This leads to faster erection , where the difference between in-situ and precast construction is as shown below:
In both cases there is considerable amount of finishing work to be carried out. This is often less in precast than in-situ work due to the quality of the products.
what are disadvantages of precast concrete?
Pre-cast concrete allows for a very small margin for error as the incorrect dimensions of pre-cast concrete may result in changing the entire design.
Yes, agreed. Thanks for your openion. Pl tell me more, if any.
Pre-cast concrete allows for a very small margin for error as the incorrect dimensions of pre-cast concrete may result in changing the entire design.
What is the importance of precast concrete.
why are you thinking for disadvantages of pre-cast concrete, Pre-cast concrete was designed for progressive construction and minimise the duration of time. Comparatively the advantages of pre-cast are more than cast in-situe. Example:-In previous days one bridge construction duration was minimum four to five years, Now a days we are constructed the bridge in one year only by segmental process of Pre-cast Concrete (Superstructures).