Damages to structural members
viz. RCC columns, beams, slabs often are due to corrosion of reinforcement
steel, as a result of chloride ingress or carbonation. Poor workmanship could
be an additional contributing factor.
The best procedure would be to:
- Remove all the
loose concrete completely and clean the reinforcement with wire brush.
- Apply Rusticide
by means of cotton waste or swab to the reinforcement.
- After 24 hrs.
apply a passivating coat of Polyalk Fixoprime / cement slurry in 1:1.25
proportion to the chemically derusted surface of steel.
- Apply a priming
cum bonding coat of Polyalk EP/cement slurry in the proportion of 1:0.5 by
weight by brush to the concrete.
- Immediately
place polymer modified mortar prepared by mixing.
1 kg
Polyalk EP
5 kgs Cement (fresh)
15 kgs Quartz Sand (graded)
Water quantity sufficient to each desired consistency.
- Finish the surface with 1:4 Cement Mortar.
- Cure as usual.
