Analysis on Physical and Mechanical Properties of Red Mud Materials and Stockpile Stability after Dilatation

Table 3

Strength and deformation indicators of the three kinds of red mud.

Type of sample	Peak strength			Cohesion c (kPa)	Internal friction angle φ(°)	Elasticity modulus E (MPa)	Poisson ration μ
	σ3 = 100 kPa	σ3 = 200 kPa	σ3 = 400 kPa
Bayer red mud from wetting process	280.16	485.12	870.46	38.49	34.12	30.16	0.365
Bayer red mud from drying process	489.25	620.16	1,308.61	58.01	35.80	28.51	0.334
Sintering red mud	1,301.21	2,057.10	3,110.78	356.42	33.58	15.78	0.345