Concrete cancer is the term we use when the steel reinforcing bars inside concrete begin to corrode. As the rust expands, it places pressure on the surrounding concrete, gradually weakening the structure. Let’s take a look at six signs this is happening.
Cracks appearing in the surface
Small cracks are the first visible warning sign, and although not every crack indicates concrete cancer, growing or spreading cracks need closer attention.
Rust stains
Brown or orange staining might mean moisture has reached the reinforcing steel, so look out for those rust marks because they appear before more obvious structural damage develops.
Local experts can help too, so if you’ve got concrete Cheltenham, for example, companies like this one www.monstermixconcrete.co.uk/concrete-cheltenham can take a look for you.
Bulging concrete
As steel corrodes, it expands, and this can force the concrete outwards and create raised or uneven areas.
Spalling
Spalling happens when pieces of concrete crack away or fall off completely.
Damp patches
Persistent damp areas or musty smells may indicate water is penetrating the concrete, and moisture is one of the main conditions that allows corrosion to continue.
Hollow sounds
If concrete sounds hollow when lightly tapped, it could mean the outer layer has separated from the material beneath.
So while these signs don’t always confirm concrete cancer, they should never be dismissed. Early investigation is usually simpler and less expensive than waiting until significant damage has occurred. Regular inspections and prompt repairs can help protect both the appearance and structural integrity of reinforced concrete for many years to come.
