6.6.2. Properties

Try these first

1. 1.

   What is the primary component of Fly Ash?

   Hint

   Think about where Fly Ash comes from.

2. 2.

   List one effect of Silica Fume on concrete.

   Hint

   Recall the main properties of Silica Fume.

3. 3.

   What property does Fly Ash primarily improve in concrete?

   • Workability
   • Color
   • Soundness

   Hint

   Consider how Fly Ash is used in concrete mixtures.

4. 4.

   True or False: Silica Fume increases the risk of water segregation in mixes that lack superplasticizers.

   • True
   • False

   Hint

   Think about the properties of Silica Fume.

5. 5.

   Design a concrete mix using Fly Ash and explain how you would determine the appropriate replacement level.

   Hint

   Base your conclusion on the specific demands of your construction project.

6. 6.

   Evaluate the impact of increasing Metakaolin in a mix and discuss the potential consequences on early strength vs. long-term performance.

   Hint

   Reflect on how active pozzolans affect hydration in the early stages.