6.3.1. Origin and Production

Try these first

1. 1.

   What is silica fume primarily used for in concrete?

   Hint

   Think about its role in the concrete mix.

2. 2.

   What is the particle size of silica fume?

   Hint

   Recall the significance of size in particle interactions.

3. 3.

   What is silica fume a by-product of?

   • Cement production
   • Silicon and Ferrosilicon alloys
   • Fly ash

   Hint

   Think about industries that involve electric arc furnaces.

4. 4.

   True or False: Silica fume contributes to increased permeability in concrete.

   • True
   • False

   Hint

   Recall the benefits it provides to concrete structure.

5. 5.

   A construction project uses 1000 kg of cement. If 10% silica fume is to be added, calculate the weight of silica fume required and discuss its expected benefits.

   Hint

   Apply the concept of percentages to find the weight.

6. 6.

   Explain how the addition of silica fume might alter the curing time of a batch of concrete compared to regular concrete.

   Hint

   Consider the interaction between silica fume and water.