Which outcome impairs a prestressed concrete beam in a marine environment?

💡 Explanation

Chloride ions penetrate the concrete, causing *rebar depassivation* that leads to corrosion embrittlement of the high-strength steel tendons, because the corrosion reduces the tendon's cross-sectional area and load-bearing capacity. Therefore, structural integrity is compromised, rather than from thermal stress or freeze-thaw distress of concrete.

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