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Which consequence results when corrosion causes iron oxide formation between reinforcing steel and concrete?

A)Increased internal expansive stress
B)Reduced alkalinity of surrounding concrete
C)Lowered steel temperature resistance
D)Increased cathodic protection effectiveness

💡 Explanation

Increased internal expansive stress arises because oxidation produces larger volumes of iron oxide via oxidizing reduction, leading to internal pressure build-up; therefore cracking appears in concrete, rather than remaining sound under load.

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