Testing the steel in concrete columns

In the case of concrete cover separation and the presence of cracks due to the rusting of the reinforcement steel to a degree that is not significant, where there is no need to increase the concrete dimensions of the column or the reinforcement steel, the following steps should be followed:

1. Straps are made every 50-75 cm along the entire length of the column by removing the concrete cover with a width of 5 cm at the strap locations, cleaning the reinforcement steel thoroughly from rust, and painting it with an anti-rust material. Then, the column is strapped at the strap locations with 2 ties of 10 mm.

2. The straps are secured on the surface of the column using a clamp, and in the case of columns with large sections, the straps can be fixed to the column using anchors embedded in the surface of the column.The belts are secured on the surface of the column using a wrench, and in the case of columns with large sections, the belts can be fixed to the column using anchors embedded in the surface of the column.

3. Fill the belt areas with a strong mortar such as polymer-modified cement mortar reinforced with fibers or epoxy mortar.The belt areas are filled with a strong mortar such as polymer-modified cement mortar reinforced with fibers or epoxy mortar.

4. The concrete cover remains in the areas between the belts.The concrete cover is removed in the areas between the belts.

5. The rebar is cleaned of rust using a wire brush mounted on a drill or a sandblasting gun.The rebar is cleaned of rust using a wire brush attached to a drill or a sandblasting gun.

6. The iron is coated with an anti-rust material.The iron is coated with an anti-rust substance.

7. The surfaces are sprayed with a strong mortar, such as polymer-modified cement mortar.The surfaces are sprayed with a strong mortar, such as polymer-modified cement mortar.

8. The concrete cover is made from a special concrete consisting of fine aggregate with a maximum particle size of no more than 5mm, sand, and cement in high proportions not less than 400kg/m3, along with additives to improve the workability of the concrete.

9. In some cases, the concrete cover is made from polymeric cement mortar, fiberglass-reinforced cement mortar, or epoxy mortar, depending on the structural requirements.