Finishing Operations:

Subsequent are the operations adopted for finishing of concrete surface.

(a) Screeding,

(b) Floating, and

(c) Trowelling.

Screeding

The leveling operation which removes humps and hollows and gives a true, uniform concrete surface is called screeding.

The process of screeding is also known as striking off. Directly edge is used for screeding. Straight edge is specially prepared and is slightly longer than the section being finished. The surface is struck off through moving the straight edge back and forth with a 'saw' like motion across the top of the forms. A straight edge is advanced forward a short distance along with each movement. A little quantity of concrete mix should always be kept ahead of the straight edge to fill the voids and maintain a plane surface. Screeds might be of vibrator type or roller type. Vibrators could also be fitted on screeds.

Figure: Screeding