6.2.3. Properties

Try these first

1. 1.

   What is a mineral admixture?

   Hint

   Think about materials that improve concrete.

2. 2.

   Name two types of pozzolanic admixtures.

   Hint

   Consider by-products from industrial processes.

3. 3.

   What is the main function of mineral admixtures in concrete?

   • Enhance performance
   • Reduce cost
   • Accelerate setting time

   Hint

   Think about how these additions affect concrete properties.

4. 4.

   Silica fume is known for which property?

   • True
   • False

   Hint

   Recall its role in improving strength.

5. 5.

   Evaluate the trade-offs when using silica fume in concrete mixtures with respect to workability and strength.

   Hint

   Think about how reactivity and particle size influence concrete mix.

6. 6.

   Formulate a mix design incorporating 25% fly ash and discuss its expected impact on hydration and strength development.

   Hint

   Discuss how pozzolanic reactions occur during hydration.