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← ScienceWhich structural failure occurs, within high humidity environments on magnesium hydroxide concrete due to hydrogen evolution?
A)Concrete tensile cracking and spalling✓
B)Accelerated rebar corrosion weakening structure
C)Alkali-silica reaction weakens aggregate
D)Freeze-thaw breaks cement-based materials
💡 Explanation
Tensile cracking will result upon hydrogen formation during corrosion of embedded magnesium hydroxide, because the electrochemical potential generates hydrogen gas within the voids via the Volmer mechanism, building pressure and therefore initiating cracking rather than the standard corrosion of rebar in a standard concrete mix.
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