Corroded RCC column and fins
Jacketing of column (full height approx. 12 mts.) by micro-concrete, using post-box formwork
Structure after patch repair
Structure after 5 years of completion of repair
Make OR Break Factor
The project was successfully completed within 30 days, which included just 7 days of shut-down.
THE CHALLENGE :
- The induced draft cooling tower was facing corrosion due to the combined corrosive effects of uncertain water chemistry, high temperatures, constant saturation and continuous natural aeration.
THE ODDS :
- Majority of the repairs had to be carried out under operation conditions
- Scaffolding had to be erected in the inclined portions as it was the outer face that bore the most damage
OUR RESPONSE :
- At a first step, corrosion had to be curtailed which was done via many curative and preventive measures
- Post that the cavities in the core concrete were grouted and other damaged concrete sections were patched up
- All structural elements were reinforced with additional steel and fibre wrapping
- And finally, a protective coating was applied to the repaired RCC surface