Strength Characteristics and Slope Stability of Expansive Soil from Pingdingshan, China

Table 3

Shear strength parameters of expansive soil at the dry density of 1.6 g/cm³.

Water content (%)	Angle of internal friction (°)	Cohesive force (kPa)
19.11	28.0	36.0
20.00	23.4	37.0
21.12	16.1	68.0
24.00	12.2	67.2
25.00	8.1	58.0
26.00	6.4	55.7
30.00	3.6	43.2
31.00	0.0	34.2
33.00	0.0	24.2