Compaction can improve which of the following properties?

Compaction can improve which of the following properties?

• A. Load bearing capacity
• B. All of the above
• C. Reduced permeability
• D. Control shrinkage and swelling

Answer: (B)

Compaction densifies soil by packing particles closer together, which raises the dry unit weight and lowers the void ratio. This increased density strengthens the soil and improves its ability to carry loads, reducing settlements under stress. It also reduces permeability because the tighter pore structure makes it harder for water to flow through and disrupts easy flow paths. Additionally, with less void space and a denser matrix, the soil’s tendency to swell when moist is limited and shrinkage is better controlled. Since compaction can improve load-bearing capacity, reduce permeability, and help control shrinkage and swelling, the best choice is the one that reflects all of these improvements.

Compaction densifies soil by packing particles closer together, which raises the dry unit weight and lowers the void ratio. This increased density strengthens the soil and improves its ability to carry loads, reducing settlements under stress. It also reduces permeability because the tighter pore structure makes it harder for water to flow through and disrupts easy flow paths. Additionally, with less void space and a denser matrix, the soil’s tendency to swell when moist is limited and shrinkage is better controlled. Since compaction can improve load-bearing capacity, reduce permeability, and help control shrinkage and swelling, the best choice is the one that reflects all of these improvements.