Repair of Parking Columns

Use the procedure for repairs to concrete damaged by corrosion , given in the other section of the website.

Alternatively, you can also follow the following procedure:

Strengthening columns in parking by confining with wire, meshes and fiber reinforced mortar

1. Remove plaster on columns if any. Expose the concrete surface and clean with wire brush.

2. Chase out about 5 to 6 mm deep ? 6mm wide spiral at a pitch of 75mm along the surface of the column.

3. Provide 4mm dia annealed M wire into these grooves and anchor by welding the wire by exposing existing side links at 0.50 mtr c/c and also at top and bottom end. The wire will provide additional side links. If welding is not possible then tie the wire to exposed links suitably tied with GI binding wire.

4. Provide 100 ? 100 mesh 10G weld mesh + 2 layer of ½ “? ½ “? 26 G GI hexagonal mesh over the entire column surface.

5. Apply polymer bond coat of 1 part polymer latex + 1 part water + 1.5 part cement (by weight) on prewetted column surface.

6. Apply first coat of fiber reinforced polymer mortar (like Smashtough) by quezing it through the mesh. Subsequent coats can b applied within 2 hours to make the thickness of 25mm to 30mm. The mortar is to be finished smooth to avoid replastering of columns again.

7. Cure for 7 days.