PROBLEM
Corrosion of embedded reinforcing steel was causing spalling on the walls. It was determined that the cause was carbonation to a 3.5 inch (8.9 cm) depth on the walls, which lowered the pH of the concrete.
APPLICATION
The design parameters required that the repair
• Provide a minimum 20-year design life
• Stop water absorption into the wall
• Reduce or stop corrosion
• Change the appearance of the walls as little as possible, or not at all
The repair program prior to coating included 1,000,000 ft2 (92,903 m2) of surface area with 200,000 ft2 (18,581 m2)of hand patches.
CONCLUSION
MCI®-2020 V/O and Keim’s Concrete Coatings were chosen to repair and protect the walls based on their 20-year warranties and the fact that together they could fulfill the other specified repair design requirements.
PRODUCTS
