24-11-2022
Carbonisation is the reaction of carbon dioxide in the atmosphere with calcium hydroxide in the cement. This reaction produces calcium carbonate, which in turn impairs the protection offered by the concrete to the embedded steel reinforcement. Where the steel is too close to the concrete surface, carbonisation will cause the embedded steel to corrode and expand, causing the concrete to fracture and spall. Our structural engineers can investigate whether carbonisation is affecting the strength and durability of your building and provide specifications for appropriate repairs.