Practice Example 2 (4.2.2) - Inter-Relations - Geotechnical Engineering

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6 sample questions

Question 1.
What is the dry unit weight of soil?
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Think about how it differs from moist unit weight.
Question 2.
What is void ratio?
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Relate it to the concept of porosity.
3Question 3.
What is the relationship between void ratio and porosity?
- e = n/(1-n)
- e = 1/n
- e = n+n
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Consider the definitions of both terms.
4Question 4.
Specific gravity is the ratio of soil solids density to the density of water. True or False?
- True
- False
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Think about how we define specific gravity in relation to water.
Question 5.
A soil sample has a porosity of 0.43 and a dry unit weight of 1600 kg/m3. Calculate the volume of voids and the specific gravity of the soil solids.
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Use the relationships between porosity, density, and weight.
Question 6.
If a soil has a dry unit weight of 1400 kg/m3 and a specific gravity of 2.65, calculate its void ratio.
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Apply the concepts of unit weight and specific gravity.

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