A soil has a dry unit weight of 16.25 kN/m3 and saturated unit weight of 20 kN/m3. If the degree of saturation of soil is 50%, then its bulk unit weight will be ______
a) 20.748 kN/m3
b) 17.628 kN/m3
c) 18.123 kN/m3
d) 19.246 kN/m3
Answer: c
Explanation: Given,
Dry unit weight γd = 16.25 kN/m3
Saturated unit weight γsat = 20 kN/m3
Degree of saturation S = 50% = 0.5
Bulk unit weight γ = γd + S[γsat– γd]
γ = 16.25 + 0.5[20-16.25]
γ =18.123 kN/m3.
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