22.3. Aggregate tests

Try these first

1. 1.

   What does the crushing test evaluate?

   Hint

   Think about what happens to a material when you apply a heavy weight on it.

2. 2.

   What is a maximum aggregate impact value for wearing courses?

   Hint

   Remember, impact means sudden force.

3. 3.

   What is evaluated in the crushing test?

   • A. Aggregate weight
   • B. Resistance to crushing
   • C. Aggregate size

   Hint

   Recall what happens when you press down on an object.

4. 4.

   Is a high impact value desirable in aggregates?

   • True
   • False

   Hint

   Consider what happens when something hard hits something else.

5. 5.

   Given an aggregate sample fails the soundness test by losing 20% of its weight after five cycles, what does this indicate about its suitability for use in road construction?

   Hint

   Recall the acceptable limits for soundness.

6. 6.

   If an aggregate has high flakiness and elongation indices but passes the abrasion and crushing tests, how would that impact its performance in real-world applications?

   Hint

   Think about how shape affects the performance rating.