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In its natural condition a soil sample has a mass of 1.980 kg and a volume of 0.001 m3. After being completely dried in an oven, the mass of sample is 1.800 kg. Specific gravity is 2.7. Unit wt of water is 10 kN/m3. Degree of saturation of soil is.
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- 0.65
- 0.7
- 0.54
- 0.61
Correct Option: C
Mass in natural state (m1) = 1.980 kg.
Mass in dry state (m2) = 1.800 kg.
Volume = 0.001 m3
G = 2.7 γw = 10 kN/m3
| γ = | = | = 1980 kg/m3. | ||
| v | .001 |
| γd = | = | = 1800 kg/m3. | ||
| v | .001 |
| γd = | 1 + w |
| 1800 = | 1 + w |
| w = | - 1 = 0.1 | 1800 |
| γd = | 1 + e |
| 1800 = | 1 + e |
(rw = 1000 kg/m3)
| e = | - 1 = 0.5 | 1800 |
| e = | = | |||
| Sr | Sr |
| Sr = | = 0.54 | 0.5 |
