2.2. Properties of Aggregates

Try these first

1. 1.

   Define specific gravity in the context of aggregates.

   Hint

   Think about how heavy the aggregate feels compared to water.

2. 2.

   What is the importance of the shape of aggregates?

   Hint

   Consider how the piece of aggregate fits together.

3. 3.

   What shape of aggregate increases workability?

   • Angular
   • Rounded
   • Flaky

   Hint

   Think about how shape allows movement.

4. 4.

   True or False: A rough texture on aggregates reduces bonding with cement.

   • True
   • False

   Hint

   Consider how attachment works on surfaces.

5. 5.

   A construction company decides to use both lightweight and heavyweight aggregates for a specific project. How do these choices impact the overall concrete structure?

   Hint

   Consider what types of structures would benefit from either choice.

6. 6.

   Devise a series of tests to evaluate the quality of aggregates before they are used in concrete production. Include at least four test types and their significance.

   Hint

   Think of tests engineers often perform for material quality checks.