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What Is The Difference Between Concrete Cancer And Concrete Spalling?
Concrete Spalling is the surface-level process of concrete breaking away, while concrete cancer is the internal, widespread corrosion of steel reinforcement within the concrete that causes and accelerates spalling. Spalling begins as flaking or chipping, whereas cancer involves the rust and expansion of internal steel, creating pressure that leads to cracking, bulging, and disintegration of the concrete itself.
What Is Concrete Spalling?
What it is:
A process where the surface layer of concrete starts to degrade, chip, flake, or crumble.
Causes:
Environmental factors like moisture, temperature changes, or poor-quality materials can weaken the concrete.
Signs:
Cracking, crumbling, peeling, or chipping concrete, as well as rust stains or bubbling on the surface.
What Is Concrete Cancer?
What it is:
An advanced stage of spalling where internal steel reinforcement corrodes and expands, causing severe structural issues and the spread of damage.
Causes:
Moisture penetrates the concrete, reaching the steel, causing it to rust. The rust expands, creating internal pressure that cracks the concrete.
Signs:
Rust stains, cracking, bubbling, bulging sections, and delamination (layers separating). The condition spreads as more steel is exposed, leading to further deterioration.
What Is The Key Difference?
The Key Difference
Spalling is the visible symptom, while concrete cancer is the underlying cause and the spreading process. You can have spalling without it being concrete cancer, but you cannot have concrete cancer without signs of spalling.
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