3.1. Gas Transport

Try these first

1. 1.

   What is carbonation in concrete?

   Hint

   Think about what happens to the pH when CO₂ interacts with concrete.

2. 2.

   Why is oxygen ingress a concern?

   Hint

   What element enhances the corrosion process in concrete?

3. 3.

   What does carbonation do to concrete?

   • True
   • False

   Hint

   Think about the chemical reaction involved with CO₂.

4. 4.

   Oxygen ingress is beneficial for concrete durability.

   • True
   • False

   Hint

   Consider the effects of oxygen on steel reinforcement.

5. 5.

   Design a concrete mix for a coastal structure aiming to minimize gas transport. Describe your choices and their impacts.

   Hint

   Consider the environmental factors when designing your mix.

6. 6.

   Evaluate a case where high carbonation rates were experienced in a structure. What preventive measures could have been implemented?

   Hint

   Think about architectural decisions that impact durability.