Carbonation of reinforced concrete can increase the risk of steel corrosion because it
Correct answer: A. Lowers the pore-water alkalinity
- A. Lowers the pore-water alkalinity
- B. Raises the pore-water alkalinity
- C. Increases the cement content
- D. Prevents oxygen from reaching steel
Explanation
Carbonation reacts with alkaline cement products and lowers the pH of the concrete. When the passive film on reinforcing steel is destroyed, corrosion becomes more likely if moisture and oxygen are available.
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About Concrete Technology
Concrete technology covers cement, aggregates, water and admixtures, including their properties, proportioning and effect on fresh and hardened concrete. It explains workability, water-cement ratio, setting, hydration, strength, durability, curing, mix design and common defects, while distinguishing segregation and bleeding from general loss of workability.
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