Experimental Investigation of Unsaturated Silt-Sand Soil Permeability

Table 2

Basic properties of the studied soil samples.

Specification	Sample
	FK0	FK10	FK20	FK30	FK40
Sand content (by dry weight) (%)	100	90	80	70	60
Silt content (by dry weight) (%)	0	10	20	30	40
Specific gravity, Gs (gr/cm^3)	2.658	2.663	2.684	2.671	2.652
Maximum dry density, γd,max (gr/cm^3)	1.594	1.719	1.797	1.799	1.67
Minimum dry density, γd,min (gr/cm^3)	1.385	1.423	1.424	1.402	1.356
Saturated permeability coefficient Ks (m/s), γd,max (gr/cm^3) = constant = 1.4	8.41e−2	3.26e−2	9.42e−3	3.63e−3	3.13e−4
Plasticity index, PI	NP	NP	NP	NP	NP
Maximum void ratio, emax	0.883	0.839	0.844	0.871	0.924
Minimum void ratio, emin	0.633	0.517	0.459	0.481	0.531
D10 (mm)	0.151	0.069	0.019	0.012	0.0069
D30 (mm)	0.194	0.174	0.156	0.077	0.032
D50 (mm)	0.25	0.233	0.214	0.191	0.164
D60 (mm)	0.285	0.269	0.253	0.229	0.203
Cu (D60/D10)	1.887	3.899	13.316	19.083	29.42
Cc ((D30)^2/(D60D10))	0.875	1.631	5.063	2.158	0.731
Soil classification (USCS)	SP	SP-SM	SM	SM	SM