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← TechnologyWhich risk is exacerbated when excessive chlorides permeate reinforced concrete structures?
A)Rebar corrosion from depassivation✓
B)Concrete spalling from alkali-silica reaction
C)Creep deformation from aggregate breakdown
D)Buckling failure from reduced elasticity
💡 Explanation
When chlorides permeate concrete, depassivation occurs via disruption of the protective oxide layer on the rebar because chloride ions react with the cement matrix, freeing up corrosive agents. Therefore, rebar corrosion results, rather than other concrete failure modes like ASR spalling, creep deformation or elastic buckling.
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