A soil sample is having a specific gravity of 2.60 and a void ratio of 0.78. The water content in percentage required to fully saturate the soil at that void ratio would be
- A10
- B30Correct
- C50
- D70
Solution
Concept
e S = w G
Formula
w = e S / G
Step-by-step solution
1. For a saturated soil S = 1. 2. w = e / G = 0.78 / 2.60 = 0.30 = 30%.
Explanation
The fundamental relation e·S = w·G gives the water content at full saturation as w = e/G.
Shortcut
Saturated: w = e/G.
Common mistake
Multiplying e and G.
Correct answer: B) 30