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← TechnologyWhich risk increases when concrete highway bridge beams experience excessive chloride penetration?
A)Prestress tendon galvanized steel corrosion✓
B)Beam shear capacity is amplified
C)Aggregate interlock strength improves
D)Concrete compressive strength increases rapidly
💡 Explanation
Excessive chlorides cause **depassivation**, disrupting oxide layers, leading to accelerated corrosion of prestressing steel strands within the beams; because the chloride ions break down the passive protective layer, therefore corrosion risk increases, rather than increasing compressive strength or shear resistance.
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