2.2. Factors Affecting Permeability

Try these first

1. 1.

   What does permeability refer to?

   Hint

   Think about how water moves through a sponge.

2. 2.

   Why is a lower water-to-cement ratio beneficial?

   Hint

   Consider strength in concrete.

3. 3.

   What is the effect of a lower water-to-cement ratio on permeability?

   • Increases permeability
   • Decreases permeability
   • No effect

   Hint

   Consider how density affects movement.

4. 4.

   True or False: Higher porosity generally means lower permeability.

   • True
   • False

   Hint

   Think about how much space is available for water.

5. 5.

   You have two concrete samples: one with a w/c ratio of 0.55 and another with 0.35. Predict which one will have higher permeability and why.

   Hint

   Consider how water affects the concrete mixture.

6. 6.

   Explore the effects of inadequate compaction on concrete performance in a wet environment.

   Hint

   Think about how air pockets influence water flow.