Table 1: Basic physical parameters of three kinds of red mud.

Type of sampleWet densitySpecific gravityPore rateLiquid limit (%)Plastic limit (%)Plasticity index

Bayer red mud from wetting process1.75 ± 0.011.22 ± 0.012.72 ± 0.0248.89 ± 0.0635.77 ± 0.5413.12 ± 0.49
Bayer red mud from drying process1.85 ± 0.021.22 ± 0.012.46 ± 0.0145.19 ± 0.4230.78 ± 0.3614.41 ± 0.19
Sintering red mud1.58 ± 0.011.06 ± 0.012.85 ± 0.0279.01 ± 0.4159.47 ± 0.2219.54 ± 0.36