5.4. Testing of Aggregates

Try these first

1. 1.

   What do we use sieve analysis for?

   Hint

   Think about how important the size of aggregates is in concrete.

2. 2.

   What does a lower Aggregate Crushing Value indicate?

   Hint

   Remember, lower is better for the structure.

3. 3.

   What does sieve analysis determine?

   • Particle size distribution
   • Aggregate shape
   • Moisture content

   Hint

   Remember how the process sorts different sizes.

4. 4.

   True or False: A higher Aggregate Impact Value is desirable for concrete applications.

   • True
   • False

   Hint

   Think about the resilience needed in concrete.

5. 5.

   Given an aggregate sample with an ACV of 25%, explain what this indicates about the quality of the aggregate and how it might affect a concrete mix design.

   Hint

   Consider how the ACV impacts structural longevity.

6. 6.

   Discuss how you would approach determining the specific gravity of an unknown aggregate sample using a coil as a reference. Include the necessary calculations.

   Hint

   Think about the displacement method related to specific gravity.