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← TechnologyWhich structural weakness arises when insufficient concrete cover exists around rebar?
A)Accelerated rebar corrosion by oxidation✓
B)Decreased ductility due to steel crystallization
C)Reduced beam shear capacity directly
D)Increased risk of concrete spalling directly
💡 Explanation
Insufficient concrete cover causes accelerated rebar corrosion via **electrochemical oxidation** because moisture and chlorides permeate the concrete, leading to oxidation; therefore, corrosion occurs, rather than solely reducing shear capacity or spalling.
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