1.1. Introduction

Try these first

1. 1.

   What does compaction do to soil?

   Hint

   Think about what happens to air pockets in soil.

2. 2.

   Define Optimum Moisture Content.

   Hint

   What does the term 'optimum' suggest?

3. 3.

   What is the primary purpose of soil compaction?

   • Enhance permeability
   • Increase density
   • Reduce moisture

   Hint

   Think about the benefits of denser soil.

4. 4.

   True or False: Higher moisture beyond OMC increases the dry density.

   • True
   • False

   Hint

   Consider the sweet spot in moisture content.

5. 5.

   A contractor believes that increasing moisture content beyond OMC will help achieve stronger soil for a road. Discuss the validity of this approach.

   Hint

   Refer back to how excess moisture affects soil behavior.

6. 6.

   Compare the effects of compaction in clayey versus sandy soils, focusing on their moisture behavior.

   Hint

   Think about how different soil types interact with water.