6.3.2. Properties

Try these first

1. 1.

   What is a mineral admixture?

   Hint

   Think about how materials are added to concrete.

2. 2.

   Name one property of fly ash.

   Hint

   How does it affect the mixing process?

3. 3.

   What type of material is fly ash?

   • Solid
   • Liquid
   • Gaseous

   Hint

   Think about its physical state.

4. 4.

   Silica fume has a high reactivity due to its:

   • Low surface area
   • High surface area
   • Chemical composition

   Hint

   Focus on the particle size and surface characteristics.

5. 5.

   Propose a concrete mix design incorporating at least two different mineral admixtures for a marine structure. Discuss the properties and reasons for the selection.

   Hint

   Consider the environment and structural requirements when selecting materials.

6. 6.

   Evaluate the impact of using a high percentage of fly ash on the hydration process and final concrete properties. What are the trade-offs?

   Hint

   Think about both immediate and long-term concrete performance.