Which risk increases when rebar cages in reinforced concrete columns experience insufficient concrete cover?

💡 Explanation

When concrete cover is insufficient, rebar is exposed to environmental elements, allowing chloride ingress because the concrete's passivation layer is compromised, leading to corrosion. Therefore, accelerated corrosion results occurs, rather than buckling, spalling, or bond strength issues which require more significant structural overloading or failure in design standards.

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