8.1. Use of Supplementary Cementitious Materials (SCMs)

Try these first

1. 1.

   What is fly ash used for in concrete?

   Hint

   Think about its origin and its effect on concrete.

2. 2.

   True or False: Silica fume increases the pore size in concrete.

   Hint

   Consider how it affects concrete density.

3. 3.

   What is the primary benefit of adding silica fume to concrete?

   • Increases pore size
   • Enhances strength
   • Increases heat generation

   Hint

   Think about its effects on the microstructure.

4. 4.

   True or False: Fly ash decreases the heat of hydration in concrete.

   • True
   • False

   Hint

   Consider its impact on temperature management during curing.

5. 5.

   Design a concrete mix for a marine environment. Detail which SCMs you would use and why.

   Hint

   Focus on the environmental stresses present in marine settings.

6. 6.

   Evaluate the long-term economic benefits of using SCMs in large infrastructure projects.

   Hint

   Connect the use of SCMs to both initial investment and long-term performance.