Which risk increases in concrete columns when chlorides penetrate to the level of the reinforcing steel?

💡 Explanation

When chlorides reach the reinforcing steel, chloride-induced corrosion initiates causing the steel to expand and crack the surrounding concrete which is called spalling. This reduces the column's ability to deform plastically under load. Therefore decreased ductility from spalling becomes significantly higher, rather than buckling, fire resistance, or tensile strength improvements, as these involve different chemical processes.

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