6.6. Liquidity Index

Try these first

1. 1.

   What is the liquidity index (LI) formula?

   Hint

   Look at what factors contribute to the LI.

2. 2.

   What does a liquidity index less than 0 signify?

   Hint

   Recall the classification ranges from the section.

3. 3.

   What does a liquidity index greater than 1 indicate?

   • Very solid soil
   • Liquid soil
   • Stiff soil

   Hint

   Think about the implications of a high water content in soil.

4. 4.

   True or False: A liquidity index between 0.25 and 0.5 indicates stiff soil.

   • True
   • False

   Hint

   Recall the classification scale discussed.

5. 5.

   If a soil has a plastic limit of 28%, liquid limit of 52%, and moisture content of 41%, calculate the liquidity index and classify it. What are the engineering implications?

   Hint

   Ensure to analyze how this impacts soil load-bearing capacity.

6. 6.

   Analyze a given soil’s moisture content of 30% with a liquid limit of 65% and plastic limit of 30%. What are the liquidity index and its classification? Discuss the conditions necessary for safe construction.

   Hint

   Consider how softness affects building foundations.