Practice Settlement (2.5) - Effect of Addition of Admixtures - Geotechnical Engineering

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6 sample questions

Question 1.
What is the primary purpose of adding admixtures to soil?
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Think about what construction needs.
Question 2.
How does compaction affect voids in soil?
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Compaction means squeezing the soil.
3Question 3.
What is the primary effect of adding stabilizing agents to soil?
- Increase permeability
- Stabilize soil
- Decrease density
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Think about why we use admixtures.
4Question 4.
True or False: Compaction increases the void ratio of soil.
- True
- False
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Remember what happens during compaction.
Question 5.
Calculate the desired compaction level needed to achieve optimal density in a sandy soil given an existing density of 1.6 g/cm³ and a target of 1.8 g/cm³.
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Consider the relationship between density and the amount of compaction effort needed.
Question 6.
Discuss the implications of choosing soil compacted wet of optimum versus dry of optimum on a construction project.
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Reflect on balance between immediate stability and long-term settlement.

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