Pouring concrete in columns needs great caution to ensure the achievement of designated strength and durability.
Place the concrete in layers and compact each layer properly to obtain a consolidated contract mass that in circles Steel bars and has low permeability.
Use vibrations to consolidate fresh contract but avoid over vibration as it may cause segregation in concrete Improper concreting procedures may cause the segregation, honeycomb, and reinforcement corrosion. As a result, the concrete column or concrete wall may deteriorate and fail.
Pouring of concrete in the column:
If the height of the wall or the column form is not considering it’s long then poured concrete from the top of the forms. Please concrete at or close to its final position.
Pour concrete in layers with a thickness ranging from 30 to 50 cm if the height of the reinforced concrete column is large.
Place concrete walls with a maximum of 60cm layer in one pass to avoid segregation.
For walls deeper than 1.2 meters then pour concrete to vertical trunks positioned at an interval of 2.4 meters.
The freefall of contract from the trunk and should be done from 0.9 to 1.5m otherwise segregation would occur.
Discharge contract into the form for a character without the use of trunk, if possible to decrease the segregation possibilities.