6.1.5. Shape of Particles

Try these first

1. 1.

   What is the main reason why the shape of aggregates is important?

   Hint

   Think about how they fit together.

2. 2.

   Name a type of shape for aggregates.

   Hint

   There are four main types discussed.

3. 3.

   What is the maximum Flakiness Index for surface courses?

   • 10%
   • 15%
   • 20%

   Hint

   Check standard specifications.

4. 4.

   True or False: Angular aggregates provide better interlocking compared to rounded aggregates.

   • True
   • False

   Hint

   Consider how shapes interact.

5. 5.

   Calculate the Flakiness Index for a sample aggregate batch where 20 out of 100 particles fall under the flaky category.

   Hint

   Use the formula for calculating index percentages.

6. 6.

   Design a construction plan that incorporates different shapes of aggregates for a high-load pavement. What shapes would you select and why?

   Hint

   Think about the performance characteristics needed for each layer of pavement.