Process

Manufacturing Process

The Pre Stressed Concrete Poles are manufactured in their respective mould made from MS Sheets of higher thickness. The mould of the poles to be casted are cleaned and well lubricated by using the mould releasing liquid. The reinforcing tendons are pre stressed with the help of the Electrical/Hydraulic Jack and the wires are locked at the end og the wires by using barrel and wedges.

The concrete of required mixed in the concrete mixture maintaining the specified cement content and water cement ration. The concrete mix is then casted in the mould with proper vibration by using form vibrators different locations of the mould for the uniform compaction throughout the pole. The compaction is done sufficiently so that it attains proper compaction and the remains no air voids inside the concrete.

The casted poles are either covered with a layer of sacking, canvas, hessian or similar absorbent material and kept constantly wet, or it is cured inside the water curing tank and kept inside up to the time when the strength of the concrete is at least equal to the minimum strength of the concrete at the time of transfer of stress.