5.1. Classification of Aggregates

Try these first

1. 1.

   What are fine aggregates?

   Hint

   Think about the size of particles.

2. 2.

   Give an example of coarse aggregates.

   Hint

   What is retained on the 4.75 mm sieve?

3. 3.

   What type of aggregates are larger than 4.75 mm?

   • Fine Aggregates
   • Coarse Aggregates
   • Natural Aggregates

   Hint

   Recall the size classifications.

4. 4.

   True or False: Lightweight aggregates have a density greater than 2000 kg/m³.

   • True
   • False

   Hint

   Think about density levels.

5. 5.

   Analyze a concrete mix design that uses 50% natural coarse aggregates and 50% recycled aggregates. Discuss potential strengths and weaknesses of this mix.

   Hint

   Think about how aggregate quality impacts concrete.

6. 6.

   Design a scenario where lightweight aggregates would be essential for a concrete application and explain why.

   Hint

   Consider applications where weight-saving is critical.