Soil-mechanics Questions Set 14:
What is the plasticity index of a cohesionless soil?
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What is the weight of the rammer used for the heavy compaction test?
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What type of bond holds the Montmorillonite clay mineral together?
Solution:
Determine the plasticity index and the toughness index of the given soil with the following properties:
Liquid limit = 50
Plastic limit = 25
Flow index = 10
Solution:
A soil sample in its natural state has mass of 2.290 kg and volume of 1.15 x 10-3 m3. After being oven dried, the mass of the sample is 2.035 kg. Gs for soil is 2.68. The void ratio of the natural soil is
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The contact pressure and settlement distribution for a footing are shown in figure.
The figure corresponds to a
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The natural void ratio of a saturated soil sample is 0.5 and its density index is 65%. If its void ratio in the loosest state is 0.8, then the water content corresponding to the densest state will be ______. (Take the specific gravity G = 2.67)
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A fully saturated clay specimen is placed in a consolidometer and subjected to a loading of 100 kN/m2. After a period of time, it was found that the average pore pressure in the specimen was 50 kN/m2. What is the percentage of consolidation reached?
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Which of the following statements is TRUE for the relation between discharge velocity and seepage velocity?
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Water flows in the upward direction in a tank through 2.5 m thick sand layer as shown in the figure. The void ratio and specific gravity of sand are 0.58 and 2.7 respectively. The sand is fully saturated. Unit weight of water is 10 kN/m3. 
The effective stress (in kPa, round off to two decimal places) at point A. located 1m above the base of the tank_________.
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