2.2. Supplementary Cementitious Materials (SCMs)

Try these first

1. 1.

   What does SCM stand for in concrete?

   Hint

   Think about materials added to enhance concrete.

2. 2.

   Name one benefit of using fly ash in concrete.

   Hint

   It's a by-product of coke production.

3. 3.

   What is the primary benefit of incorporating SCMs into concrete?

   • A) Increased cost
   • B) Enhanced properties
   • C) Reduced workability

   Hint

   Think about what makes concrete stronger or more durable.

4. 4.

   True or False: Fly ash can contribute to lower environmental impact in concrete production.

   • True
   • False

   Hint

   Consider its role in reducing harmful material usage.

5. 5.

   Calculate the percentage reduction in CO2 emissions if using 30% fly ash replacement for cement in a given concrete mix.

   Hint

   Consider the proportion of cement used in the overall mix.

6. 6.

   Design a concrete mix that includes all four SCMs while maintaining the required strength of 60 MPa. What considerations must be taken into account?

   Hint

   Think about how each SCM affects workability and aesthetics.