A fall cone test was carried out on a soil to determine its Atterberg limits using a cone of mass 80 g. The following results were obtained. Penetration (mm) Water content (%) 8. 15 19 28 43.1 52.0 56.1 62.9 Determine (a) the liquid and plastic limits and (b) the plasticity index. (c) If the soil contains 45% clay, calculate the activity. (d) What is the predominant mineral in this soil?

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A: Step 1:Step 2: Step 3: Step 4:

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Laboratory Determination of Hydraulic Conductivity

Hydraulic conductivity is the measure of flowability of water inside the soil in the presence of a hydraulic gradient. The hydraulic gradient is defined as the difference in the water heads in the soil, which induces a water motion. In simple terms, a hydraulic gradient is the presence of a potential that induces a flow of water.