Concrete Damage from Low pH Water

Concrete damage from low pH water happens when acids react with the hydrated cement paste. This reaction dissolves the paste, so the concrete becomes softer and weaker. The problem is often seen in chimneys, sewers, and industrial settings.

The amount of damage depends on how acidic the water is....

Acids interacting with concrete dissolve the hydrated cement paste, leading to a softened and structurally weakened material.

Acidity breaks down the concrete when the water pH drops below 6.5, and the deterioration accelerates if the pH level falls below 4.5.

Water with 15 to 60 parts per million of carbon dioxide, such as melted ...