6.1. Increase in compaction increases density and number of contacts.

Try these first

1. 1.

   What is the primary effect of compaction on soil density?

   Hint

   Think about what happens to air in the soil during compaction.

2. 2.

   Name one way compacted soil affects shear strength.

   Hint

   Consider how particles interact as they are packed together.

3. 3.

   What happens to soil permeability when compaction increases?

   • Increases
   • Decreases
   • Remains the same

   Hint

   Remember the relationship between density and how well water can flow through soil.

4. 4.

   True or False: Compacted soil can be more permeable when compacted dry of optimum compared to wet.

   • True
   • False

   Hint

   Think about how moisture affects soil structure.

5. 5.

   Given a situation where a building is experiencing uneven settling, analyze approaches that could be taken during the compaction process to ensure uniform density.

   Hint

   Review how moisture impacts density and how equipment can vary compactive efforts.

6. 6.

   Evaluate the role of soil particle sizes in determining the permeability of compacted soils and their shear strength.

   Hint

   Think about how particle shape and size change the soil's response to compaction.