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During Roman concrete production, which consequence arose when excessive seawater was used?

A)Accelerated rebar corrosion occurred rapidly
B)Increased setting time became substantial
C)Hydration heat caused thermal cracking
D)Aggregate segregation created weak points

💡 Explanation

Accelerated rebar corrosion occurred because chloride ingress caused depassivation of the steel reinforcement, therefore, corrosion occurred rather than prolonged strength due to lack of a passivating layer. *Electrochemical corrosion* is the cause.

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