11.2.4. Mix Composition

Try these first

1. 1.

   What are supplementary cementitious materials?

   Hint

   Think about materials like fly ash.

2. 2.

   What is the role of aggregate in concrete?

   Hint

   Consider what makes concrete strong.

3. 3.

   Which of the following is a supplementary cementitious material?

   • Sand
   • Fly Ash
   • Water

   Hint

   Which one is not just a filler?

4. 4.

   True or False: Higher permeability in concrete is desirable for durability.

   • True
   • False

   Hint

   Think about what we want to keep out of concrete.

5. 5.

   Calculate the optimal mix design for a concrete exposed to marine conditions, factoring in the use of SCMs and quality aggregates.

   Hint

   Refer to standards for marine exposure recommendations.

6. 6.

   Evaluate a concrete mix with high permeability and the potential effects on structural durability over time.

   Hint

   What happens to concrete when it absorbs water?