Which type of concrete spalling is promoted when reinforcing steel rebar corrodes?

💡 Explanation

When steel rebar corrodes, the oxidation process produces iron oxide, which occupies a larger volume, creating internal tensile stresses within the concrete matrix, exceeding its tensile strength. Therefore, rebar corrosion-induced spalling results, rather than other types, which are caused by entrapped air, alkali reactions, or freeze-thaw cycles.

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