Concrete Spalling On Buildings
What causes concrete spalling? Concrete spalling is most commonly caused by corrosion of the steel reinforcement bars embedded in the concrete matrix. The net result of the corrosion of the rebar is the growth of ferrous oxide scale on the rebar. The ferrous oxide scale exerts enough force on the surrounding material that it splits the concrete. This splitting is what we refer to as spalling.
Concrete Spalling On Driveways
Concrete spalling on driveways is more common in colder climates where freeze-thaw cycles are prevalent. Freezing causes the water in the capillaries of the concrete to expand, creating pressure. Over time, the expansive pressure from repeated cycles of freezing and thawing can break away the top surface of the concrete, leaving pit marks and exposing the coarse aggregate.
Concrete Spalling In Foundations And Basements
Concrete spalling in foundations/basements is most commonly caused by water being pushed from the surrounding soil in through your basement walls. The water, and/or pressure from the water, causes spalling.
How To Prevent Concrete Spalling
The most effective way to prevent concrete spalling is to seal your concrete with a permanent concrete sealer (hardener and densifier) or apply a water repellent.
How To Repair Concrete Spalls
You repair concrete spalls like you would repair a concrete crack. The Foundation Armor concrete repair kit can be used to repair cracks inside and outside on foundation walls, foundation floors, concrete driveways, decks, patios, and more.