7.1 - Compaction increases density and decreases void ratio.
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Practice Questions
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What happens to the voids in a soil mass when it is compacted?
💡 Hint: Think about what happens when you press a sponge.
Which has higher shear strength, dry of optimum or wet of optimum soil?
💡 Hint: Remember the effects of moisture on soil structure.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is the primary effect of soil compaction?
💡 Hint: Consider what happens when soil is compacted.
True or False: Soil compacted wet of optimum always displays higher shear strength.
💡 Hint: Think about how water affects soil particles.
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Challenge Problems
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Given a soil type with a starting void ratio of 0.8, calculate the new void ratio after compaction that doubles the soil density, assuming no change in volume.
💡 Hint: Consider the formula density = mass/volume and how void ratio relates to the volume of solids and voids.
Evaluate how changing the moisture content during compaction of a clayey soil impacts its long-term consolidation settlement.
💡 Hint: Think about how the state of water affects clay particle arrangements.
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