Question

For a line showing the relation between water content and dry density for a constant degree of saturation is __________

(a) \(ρ_d=\frac{G}{1+wG}S\)

(b) \(ρ_d=\frac{Gρ_w}{wG}S\)

(c) \(ρ_d=\frac{ρ_w S}{1+wG}\)

(d) \(ρ_d=\frac{Gρ_w}{1+\frac{wG}{S}}\)

I have been asked this question during an online interview.

My question is from Modified Proctor Test and Harvard Miniature Compaction Test topic in division Compaction of Geotechnical Engineering I

Answer 1

Correct choice is (d) \(ρ_d=\frac{Gρ_w}{1+\frac{wG}{S}}\)

The explanation is: For a line showing the relation between water content and dry density for a constant degree of saturation is given by,

\(ρ_d=\frac{Gρ_w}{1+\frac{wG}{S}},\)

where, ρd=dry mass density

ρw= mass density of water

G=specific gravity

S=degree of saturation.