6.1.1. Strength

Try these first

1. 1.

   What does the term 'strength' refer to in road aggregates?

   Hint

   Think about what aggregates need to endure.

2. 2.

   What is one test used to determine aggregate strength?

   Hint

   It has 'value' in its name.

3. 3.

   What is the maximum acceptable Aggregate Crushing Value for wearing surfaces?

   • 30%
   • 35%
   • 40%

   Hint

   Remember the specific limits set for various pavement types.

4. 4.

   True or False: Higher ACV values are more desirable for all pavement types.

   • True
   • False

   Hint

   Consider the context of how aggregates behave under traffic.

5. 5.

   Consider a new type of aggregate with an ACV of 45%. Discuss the implications of using this material for a city road with heavy traffic.

   Hint

   Think about how materials should withstand force over time.

6. 6.

   Propose a way to improve the adhesion of aggregates with bitumen if the Static Immersion Test shows poor results.

   Hint

   Consider what additives might enhance bonding.