7.3. Standard Tests on Aggregates

Try these first

1. 1.

   What is the acceptable crushing value for aggregates used in pavement layers?

   Hint

   Look for the threshold established in the Crushing Test.

2. 2.

   What does the Abrasion Test measure?

   Hint

   Think about how traffic wears down roads.

3. 3.

   What is the acceptable range of crushing value for aggregates?

   • <20%
   • <30%
   • <40%

   Hint

   Consider the specifications for construction aggregates.

4. 4.

   True or False: The Abrasion Test has a limit of less than 35% for bituminous mixes.

   • True
   • False

   Hint

   Remember the ranges for different tests.

5. 5.

   You have a sample with a crushing value of 35%. Analyze whether this sample is suitable for surface courses and explain your reasoning.

   Hint

   Refer back to the acceptable limits established in your notes.

6. 6.

   You need to select aggregates for a road requiring high durability against weathering. Which tests would be most relevant, and why?

   Hint

   Do remember to apply the reasoning of how weather impacts roads over time.