Which risk increases when reinforcing steel corrodes within a concrete support column?

💡 Explanation

When reinforcing steel corrodes, the iron oxidation product (rust) has greater volume than the original steel, causing expansive pressure at steel-concrete interface, leading to concrete cracking and delamination, called spalling. Therefore, rebar exposure happens, rather than shear failure, buckling, or torsion, which occur due to fundamentally different mechanical stresses or mechanisms.

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