Landslide Failure Mechanisms of Dispersive Soil Slopes in Seasonally Frozen Regions

Table 3

Dispersibility of dispersive soil.

Crumb test	Double hydrometer test	Pinhole test					Exchangeable sodium percentage/ESP (%)	Sodium adsorption ratio/SAR
	Dispersion ratio (%)	Dry density (g·cm^−3)	Final head (mm)	Pinhole size	Final flow (ml/s)	Colour
Dispersive	96.6	1.53	50	×3	1.7	Dark	23.15	25.77

Notes: ASTM D4647-1993 (USA).