Assignment 2 outline

Assignment 2 outline - CIVE 353 - Geotechnical Engineering...

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Depart m ent of Civil Engineering CIVE 353 - Geotechnical Engineering I ASSIGNMENT 2 Posted Date: Monday, Jan 18, 2010 Due Date: Monday, Jan 25, 2010 @4PM 1. Explain why cohesive and cohesionless soils have different: compressibility, strength and permeability properties? 2. Clays have a plastic limit while silts are non-plastic. Why does this happen? 3. You have two saturated samples of clay. One sample is kaolinite and the other is bentonite. Both clays have the same void ratio. Which clay will have a lower permeability? Explain your answer. 4. Four soil particle size analyses are presented in the following Table. Metric Sieve Size US Sieve Size Soil A (g) Soil B (g) Soil C (g) Soil D (g) 25mm 1 in 0 0 0 0 19 mm 3/4 in 0 62.14 0 0 9.5 mm 3/8 in 0 118.25 0 0 4.76 mm No.4 41.01 28.2 20 0 2.38 mm No.8 55.25 62 120 0 0.84 mm No.20 60.32 74.52 130 0 420 μ m No.40 141.66 100.63 130 241.4 250 μ m No.60 234 68.98 90 171.8 150 μ m No.100 98.97 110.1 80 14.7 75 μ m No.200 53.24 102.82 100 7.5 Pan Pan 37.32 53.25 20
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Assignment 2 outline - CIVE 353 - Geotechnical Engineering...

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