7. Case Studies on Durability Failures

Try these first

1. 1.

   What is the primary cause of corrosion in reinforced concrete structures?

   Hint

   Think about materials and environmental exposure.

2. 2.

   What chemical reaction occurs during carbonation in concrete?

   Hint

   Consider what happens to the material's alkalinity.

3. 3.

   What was the main cause of corrosion in the coastal bridge?

   • Inadequate drainage
   • High chloride ingress
   • Poor material selection

   Hint

   Consider how environmental factors interact with construction practices.

4. 4.

   True or False: Carbonation increases the alkalinity of concrete.

   • True
   • False

   Hint

   Think about what happens to pH when CO₂ reacts with concrete.

5. 5.

   Analyze the long-term impact of moisture exposure on the durability of concrete structures subjected to chloride attack and carbonation.

   Hint

   Consider how preventive measures can mitigate these effects.

6. 6.

   Design a concrete mixture suitable for designing a coastal bridge that minimizes durability issues seen in previous case studies.

   Hint

   Think about the right blend of materials and practices to enhance the concrete's longevity.