17.9.1. Use of Supplementary Cementitious Materials

Try these first

1. 1.

   What does SCM stand for?

   Hint

   Remember it helps in improving concrete properties.

2. 2.

   Name one Supplementary Cementitious Material.

   Hint

   Think about materials that help in concrete.

3. 3.

   What role do Supplementary Cementitious Materials (SCMs) play in concrete?

   • They reduce strength.
   • They enhance durability and sustainability.
   • They replace aggregates.

   Hint

   Think about their benefits we discussed!

4. 4.

   True or False: Fly ash is derived from burning coal.

   • True
   • False

   Hint

   Think about the source of different materials.

5. 5.

   Given that a concrete mix without SCMs has a carbon footprint of 450 kg of CO2 per ton, calculate the potential reduction when using SCMs that reduces this by 25%.

   Hint

   Consider the percentage of reduction applied to the total emissions.

6. 6.

   Assuming a pavement uses 2000 tons of concrete, determine the amount of fly ash required if it replaces 30% of the cement content, given the cement content is 300 kg/m³ and the total volume is 1000 m³.

   Hint

   Calculate the volume of cement first, then apply the percentage to find the amount of fly ash.