24.2.2. Constituents of a mix

Try these first

1. 1.

   What are the primary functions of coarse aggregates in a bituminous mix?

   Hint

   Think about why we use larger rocks.

2. 2.

   Name one example of a fine aggregate.

   Hint

   Consider what type of material fills the gaps in larger aggregates.

3. 3.

   What is the primary purpose of coarse aggregates in a bituminous mix?

   • To provide color
   • To provide strength
   • To provide smoothness

   Hint

   Think about what happens if you used only small pieces.

4. 4.

   True or False: Fillers help in achieving impermeability in a bituminous mix.

   • True
   • False

   Hint

   What role do fillers play in the mix's structure?

5. 5.

   Suppose you are designing a pavement for a highway that expects heavy traffic loads. Discuss how you would choose the constituents of a bituminous mix to meet these demands.

   Hint

   Consider the importance of strength and stability under load.

6. 6.

   Analyze a scenario where the water-cement ratio in fillers is overly high. What could be the implications for the bituminous mix?

   Hint

   What happens to a mixture when there's too much liquid relative to solids?