2.3.3. Significance in Pavement Engineering

Try these first

1. 1.

   What are the three components of Atterberg limits?

   Hint

   Think about the states of moisture in soil.

2. 2.

   What is the significance of a high Plasticity Index?

   Hint

   Consider how moisture affects soil behavior.

3. 3.

   What does the Plasticity Index signify?

   • Soil cohesion
   • Soil expansion potential
   • Soil compaction rate

   Hint

   Think about how soil changes with moisture.

4. 4.

   True or False: A higher Plasticity Index always indicates better soil for pavement subgrade.

   • True
   • False

   Hint

   Consider what high PI indicates regarding volume changes.

5. 5.

   Evaluate a pavement design scenario with high moisture retention in the subgrade due to expansive soils. Suggest treatments and their rationale.

   Hint

   Consider both chemical and physical methods for intervention.

6. 6.

   In a case study, a highway constructed on high PI soils experienced cracking after heavy rains. How could the original design have integrated PI considerations?

   Hint

   Look into pre-emptive design changes that ensure durability.