6.2.2(a). Coarse Aggregates

Try these first

1. 1.

   What size defines coarse aggregates?

   Hint

   Think about the sieve size.

2. 2.

   Name one application of coarse aggregates.

   Hint

   Consider where road foundations are built.

3. 3.

   What are coarse aggregates defined as?

   • Aggregates smaller than 4.75 mm
   • Aggregates retained on a 4.75 mm sieve
   • Aggregates used only in concrete

   Hint

   Focus on the sieve size.

4. 4.

   True or False: Coarse aggregates are only used in concrete pavements.

   • True
   • False

   Hint

   Remember the applications discussed.

5. 5.

   Design a pavement structure using coarse aggregates and explain your reasoning for the sizes chosen.

   Hint

   Consider the traffic load and pavement durability.

6. 6.

   Evaluate the performance differences of angular versus rounded coarse aggregates in pavement layers.

   Hint

   Focus on how shape impacts stability.