Designation

Identification

Bentonite of Mostaganem [3]

Bentonite of Maghnia

Natural water content (%)(1)

9

8.5

Specific density of solid grains. Gs(2)

2.70

2.72

Percentage of particles < à 80 µm(3)

100

100

Percentage of particles C2 < à 2 µm(3)

46.5

42.5

Liquidity limit. Wl (%)(4)

187

240

Plasticity limit Wp (%)(4)

45

43

Plasticity index Ip (%)(4)

142

197

Consistency index Ic (%)(4)

1.25

1.18

Withdrawal limit Lr (%)(5)

13

10.24

Withdrawal index Ir (%)(5)

174

229.76

Activity (%) Ac(6)

3.89

6.06

Free swelling (ml)(7)

23

35

Value of methylene blue test (8)

8.25

18.75

specific area (m2/g)(9)

168

394

pH(10)

8.6

10.3