6.1. Requirements of Road Aggregates

Try these first

1. 1.

   What does ACV stand for?

   Hint

   Focus on the strength testing of aggregates.

2. 2.

   What is the permissible maximum value for water absorption?

   Hint

   Think about how water affects aggregates.

3. 3.

   What is the maximum Aggregate Crushing Value (ACV) for wearing surfaces?

   • 30%
   • 35%
   • 40%

   Hint

   Remember the specific limits for different applications.

4. 4.

   True or False: A lower Specific Gravity indicates better quality aggregates.

   • True
   • False

   Hint

   Consider what density means in this context.

5. 5.

   You have two types of aggregates, A and B. Aggregate A has an ACV of 25%, and B has an AIV of 32%. Determine which aggregate is better for use in wearing surfaces and provide reasoning.

   Hint

   Focus on the definitions of ACV and AIV for choosing.

6. 6.

   Evaluate the impact of high water absorption rates on the durability of a roadway. How would this information influence the choices in material selection for a highway project?

   Hint

   Consider the long-term effects of moisture on asphalt quality.