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← ScienceWhich 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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