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.
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