3. Mineral Admixtures (Supplementary Cementitious Materials – SCMs)

Try these first

1. 1.

   What is a mineral admixture?

   Hint

   Think about materials that react with calcium hydroxide.

2. 2.

   Name one type of mineral admixture and its source.

   Hint

   Consider the processes that generate waste materials.

3. 3.

   What is the primary benefit of using mineral admixtures in concrete?

   • A) Increase heat of hydration
   • B) Improve long-term strength
   • C) Reduce workability

   Hint

   Think about how these admixtures affect concrete performance.

4. 4.

   True or False: Fly ash can help reduce the permeability of concrete.

   • True
   • False

   Hint

   Recall the properties associated with fly ash.

5. 5.

   Analyze a case study where fly ash was used in a road construction project. Discuss the advantages it brought in terms of performance and sustainability.

   Hint

   Consider the lifecycle and environmental implications of using fly ash.

6. 6.

   Design a small experiment to compare the performance of concrete with and without silica fume in terms of strength and permeability. Outline your methodology.

   Hint

   Think about how to establish control and variability in your experiment.