6.2. Fly Ash (Pulverised Fuel Ash)

Try these first

1. 1.

   What is fly ash?

   Hint

   Think about where it comes from.

2. 2.

   Name the two classes of fly ash.

   Hint

   Consider their calcium content.

3. 3.

   What is the primary composition of fly ash?

   • Calcium carbonate
   • Silicon dioxide
   • Aluminum oxide

   Hint

   Remember the key components discussed.

4. 4.

   Class F fly ash is high in calcium. True or False?

   • True
   • False

   Hint

   Think about the characteristics of Class F.

5. 5.

   Given a scenario where concrete is used in a high-durability environment, what considerations might lead you to choose Class F fly ash over Class C?

   Hint

   Consider the environmental factors affecting durability.

6. 6.

   Analyze how the introduction of fly ash might affect the scheduling of a construction project that relies on early strength gain.

   Hint

   Review how fly ash influences early versus long-term strength.