22.3.5. Shape tests

Try these first

1. 1.

   What does the flakiness index measure?

   Hint

   Think about the least dimensions of particles.

2. 2.

   Define the elongation index.

   Hint

   Focus on the longest dimension of aggregate particles.

3. 3.

   What does the flakiness index assess in aggregate testing?

   • Proportion of spherical particles
   • Proportion of flaky particles
   • Proportion of elongated particles

   Hint

   Focus on the definition of flakiness.

4. 4.

   True or False: The elongation index is applicable only to aggregate particles larger than 6.3mm.

   • True
   • False

   Hint

   Think about the size limitations.

5. 5.

   If given a sample of aggregate with a flakiness index of 35% and an elongation index with no established limits, how would you assess its suitability for pavement?

   Hint

   Consider how flakiness affects performance.

6. 6.

   Propose a strategy to ensure that the aggregates used in a new pavement project remain within the optimal flakiness and elongation indices. What measures would you suggest?

   Hint

   Think about regular testing and quality control.