37.1.5. Plasticity Index (PI)

Try these first

1. 1.

   What is the Plasticity Index?

   Hint

   Think about the moisture content and soil behavior.

2. 2.

   How does a high PI affect liquefaction potential?

   Hint

   Consider how plasticity contributes to strength.

3. 3.

   What does Plasticity Index measure?

   • Soil density
   • Moisture content limits
   • Soil permeability

   Hint

   Think about the definition of PI.

4. 4.

   True or False: A higher Plasticity Index always indicates better soil strength.

   • True
   • False

   Hint

   Consider the relationship between PI and soil performance.

5. 5.

   A construction site is located on silty clay with a PI of 9. Evaluate the risks involved in an earthquake scenario.

   Hint

   Consider the relationship between PI and liquefaction risks.

6. 6.

   In an area where traditionally high PI clays are replaced with low PI soils, propose a mitigation strategy for future construction.

   Hint

   Assess how to strengthen the foundation on weaker soils.