22.3.2. Abrasion test

Try these first

1. 1.

   What is the main purpose of the Los Angeles abrasion test?

   Hint

   Think about the importance of materials' resistance to friction.

2. 2.

   What does a lower Los Angeles abrasion value indicate?

   Hint

   Consider how this affects road durability.

3. 3.

   What did the abrasion test measure?

   • A. Thickness of the aggregate
   • B. Hardness and durability
   • C. Weight of the aggregate

   Hint

   Think about the impacts of wear on aggregates in road construction.

4. 4.

   True or False: A Los Angeles abrasion value over 40% is acceptable for a water-bound macadam base course.

   • True
   • False

   Hint

   Consider the quality thresholds for construction materials.

5. 5.

   Given an aggregate sample subjected to the Los Angeles abrasion test that results in a 38% loss in weight, discuss its suitability for use in a bituminous concrete project with supportive reasoning.

   Hint

   Review the permissible limits for different pavement types.

6. 6.

   You have two aggregate samples, one with a 30% and another with a 50% Los Angeles abrasion value. Discuss which sample is preferable for construction and why.

   Hint

   Think about how abrasion values guide material selection.