5.2.2.2. Impact Strength (Aggregate Impact Value - AIV)

Try these first

1. 1.

   What does AIV stand for?

   Hint

   Think about how it describes what the aggregate can withstand.

2. 2.

   Why is a lower AIV considered better?

   Hint

   Remember, we want aggregates that won't break easily!

3. 3.

   What does a lower Aggregate Impact Value indicate?

   • Higher durability
   • Lower strength
   • No impact on quality

   Hint

   Think about what it means for how long something lasts.

4. 4.

   True or False: An Aggregate Impact Value of 25% is ideal for concrete used in pavements.

   • True
   • False

   Hint

   Recall our discussion about preferred values for AIV.

5. 5.

   You have been tasked with selecting aggregates for a new concrete road. The project specifications highlight an AIV requirement of below 20%. You discover the aggregates available have an AIV of 22%. How would you handle this situation?

   Hint

   Consider options for replacement aggregates or adjustments to the mix.

6. 6.

   Evaluate how environmental conditions might influence the selection of aggregates with respect to their AIV.

   Hint

   Think about how time and weather can impact materials.