3.2. Properties of Aggregates

Try these first

1. 1.

   What does specific gravity tell us about aggregates?

   Hint

   Think about how density is measured.

2. 2.

   Name two mechanical properties of aggregates.

   Hint

   Consider what might measure the strength of aggregates.

3. 3.

   What does porosity refer to in aggregates?

   • Water retention ability
   • Density
   • Size distribution

   Hint

   Think about how much space is filled by water in aggregates.

4. 4.

   True or False: Angular aggregates lead to lower workability than rounded aggregates.

   • True
   • False

   Hint

   Consider how shapes interlock.

5. 5.

   You need to design a concrete mix for a coastal environment prone to wear and moisture. What aggregate properties would you prioritize, and why?

   Hint

   Consider environmental factors that could affect concrete performance.

6. 6.

   Evaluate the effects of high porosity aggregates on the overall strength of concrete. What specific adjustments would you recommend?

   Hint

   Think about how water interact with aggregates in concrete.