6.2.2. Types of Fly Ash

Try these first

1. 1.

   What is fly ash?

   Hint

   Think about what comes from burning coal.

2. 2.

   Name the two types of fly ash.

   Hint

   Remember F for Few calcium and C for Cementitious.

3. 3.

   What type of fly ash is low in calcium and has pozzolanic properties?

   • Class A
   • Class B
   • Class F
   • Class C

   Hint

   Remember F is for Few calcium.

4. 4.

   True or False: Class C fly ash can provide both pozzolanic and cementitious qualities.

   • True
   • False

   Hint

   C for Cement!

5. 5.

   Design a concrete mix for a highway that requires rapid strength gain. Specify the role of Class C fly ash.

   Hint

   Think about the setting time and strength needs.

6. 6.

   Evaluate the environmental benefits of substituting traditional cement with fly ash in a large-scale construction project.

   Hint

   Consider both environmental impacts and cost savings.