2.1. Mechanism

Try these first

1. 1.

   Define durability in the context of concrete.

   Hint

   Think about how long concrete lasts under different conditions.

2. 2.

   What is permeability?

   Hint

   Consider what happens when water touches concrete.

3. 3.

   What property measures how easily fluids can pass through concrete?

   • Durability
   • Permeability
   • Workability

   Hint

   Think about moisture and fluids interacting with concrete.

4. 4.

   True or False: High permeability is beneficial for concrete durability.

   • True
   • False

   Hint

   Consider how water can weaken a structure.

5. 5.

   Design a concrete mix for a bridge in a cold region, factoring in freeze-thaw effects. Consider materials and ratios.

   Hint

   Remember to consider the environment and how materials interact.

6. 6.

   Evaluate a case where a building suffered from sulphate attack. Propose a remedial strategy for future constructions.

   Hint

   Think about safeguarding against the conditions that caused the attack.