6.5.2. Properties

Try these first

1. 1.

   What is fineness in the context of mineral admixtures?

   Hint

   Think about how smaller particles might impact chemical reactions.

2. 2.

   Define workability in concrete.

   Hint

   Remember, it's about how easily concrete can be mixed and used.

3. 3.

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

   • Immediate strength gain
   • Long-term strength enhancement
   • Lower water requirement

   Hint

   Think about how these materials act over time.

4. 4.

   True or False: GGBS requires water and alkaline conditions to achieve its hydraulic properties.

   • True
   • False

   Hint

   Consider why hydration is significant.

5. 5.

   You are designing a concrete mix for a marine structure. Discuss the selection of mineral admixtures and how you would justify your choices based on their properties.

   Hint

   Think about the environment and stresses the concrete will face.

6. 6.

   Analyze how changes in curing conditions might affect the performance of silica fume in a concrete mix. What practices would you recommend?

   Hint

   Consider the relationship between water and reaction rates.