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Tableau 1
Analyses physico-chimiques des argiles étudiées.
Physical and chemical tests of the studied clays.
| Analyses | Échantillons | C2 | Cr1 | BM2 | Dj1 |
|---|---|---|---|---|---|
| Compositions chimiques (±2%) | SiO2 | 53,4 | 52,6 | 48,9 | 54,8 |
| Al2O3 | 17,9 | 18,8 | 15,6 | 13,6 | |
| Fe2O3 | 6,7 | 7,4 | 6,5 | 6,2 | |
| CaO | 2,8 | 0,6 | 6,0 | 4,5 | |
| MgO | 2,3 | 2,0 | 1,7 | 1,1 | |
| K2O | 4,1 | 4,8 | 4,5 | 3,9 | |
| Na2O | 0,4 | 0,2 | 0,4 | 0,8 | |
| SO3 | 1,1 | 1,0 | 1,5 | 4,0 | |
| Calcimétrie (± 2 %) | P.F. | 9,7 | 11,4 | 13,5 | 10,0 |
| CaCO3 | 7,2 | 3,4 | 12,8 | 6,9 | |
| Surface spécifique (m2/g±2) | S.S. | 35 | 34 | 32 | 35 |
| Granulométrie | Fraction < 2 µm | 37 | 35 | 45 | 38 |
| WL | 43 | 37 | 42 | 38 | |
| Plasticité (±2%) | WP | 25 | 24 | 22 | 25 |
| IP | 18 | 13 | 20 | 13 |
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