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Compressibility parameters of oedometric tests_
| Test | Cc | Cs | Cc/Cs | P0 (kPa) | Ps (kPa) | DH/H (%) | |
|---|---|---|---|---|---|---|---|
| Correlation | 0.43 | 0.11 | 4 | 2000–2500 (*) | – | – | |
| OT1 | 0.42 | 0.11 | 3.81 | – | – | – | |
| OT2 | 0.41 | 0.11 | 3.77 | 100 | – | – | |
| OT3 | Soil 01 | 0.30 | 0.08 | 3.75 | 150 | 1200 | 34.5 |
| Soil 02 | 0.30 | 0.08 | 3.75 | 170 | 800 | 29 | |
| Soil 03 | 0.28 | 0.075 | 3.73 | 180 | 1000 | 33 |
Chemical composition of minerals_
| Silica | Alumina | Calcium | Magnesium | Potassium | Sodium | Sulfur | Chlorine | |
|---|---|---|---|---|---|---|---|---|
| SiO2 | Al2O3 | Fe2O3 | CaO | MgO | K2O | Na2O | SO3 | Cl |
| 49.00% | 14.34% | 5.43% | 10.87% | 2.86% | 1.81% | 0.52% | 1.96% | 0.02% |
Variation of the state parameters as a function of suction domain on drying path_
| Test | Suction domain | Δe | Δe / (1+e0) (%) | ΔSr (%) | Δw (%) |
|---|---|---|---|---|---|
| D-W1 | s ≤ sd | 0.85 | −34 | 4 | 31.5 |
| sd ≤ s ≤ sSL | 0.24 | −14.5 | 3.5 | 9 | |
| s ≥ sSL | 0 | 0 | 86.5 | 13 | |
| D-W2 | s ≤ sd | 0.63 | −27.5 | 3.5 | 23 |
| sd ≤ s ≤ sSL | 0.24 | −14.5 | 3.5 | 9 | |
| s ≥ sSL | 0 | 0 | 86.5 | 13 |
Lithology of the site_
| Depth(*) | Soil description |
|---|---|
| 0 – 0.5 m | Topsoil, surface clayey sands |
| 0.5 – 2.5 m | Clay + Sandy clay |
| 2.5 – 10 m | Compact greenish marl with traces of sand, clay, gypsum and carbonate concretions. |
Mineralogical composition of the studied soil_
| Quartz | Calcite | Gypsum | Dolomite | Feldspar | Montmorillonite | Illite | Kaolinite |
|---|---|---|---|---|---|---|---|
| 19% | 16.5% | 0.1% | 2% | 2.4% | 40% | 5% | 15% |
Comparison of compressibility parameters of drying-wetting and oedometric tests_
| Test | Cc or Id (I) | Cs or Iw (II) | (I/II) |
|---|---|---|---|
| Correlation | 0.436 | 0.110 | 4 |
| OT1 | 0.420 | 0.110 | 3.81 |
| OT2 | 0.415 | 0.110 | 3.77 |
| D-W1 | 0.394 | 0.120 | 3.28 |
| D-W2 | 0.394 | 0.120 | 3.28 |
Physical and chemical properties of the studied material_
| Physical identification | ||
|---|---|---|
| ▪ Particle size | ||
| Gravel | (%) | - |
| Sand | (%) | 5 |
| Silt | (%) | 35 |
| Clay | (% < 2μm) | 60 |
| (% < 80μm) | 98 | |
| ▪ Atterberg limit | ||
| Liquid limit LL | (%) | 61.5 |
| Plastic limit PL | (%) | 29.5 |
| Plasticity index PI | (%) | 32 |
| ▪ Solid grains density | 2.65 | |
| Chemical identification | ||
| ▪ Value of methylene blue | 7.2 | |
| ▪ Specific surface area | (m2/g) | 150.7 |
| ▪ CaCO3 content | (%) | 46 |
| ▪ Organic matter content | (%) | 8.5 |
| ▪ Clay activity | 0.53 | |
Variation of the state parameters as a function of suction domain on wetting path_
| Test | Suction domain | Δe | Δe / (1+e0) (%) | ΔSr (%) | Δw (%) |
|---|---|---|---|---|---|
| D-W1 | s ≥ sSL | 0 | 0 | 72 | 13 |
| sSL ≤ s ≤ sresat | 0.18 | 13 | 16 | 5 | |
| s ≤ sresat | 0.45 | 28.5 | 7 | 18 | |
| D-W2 | s ≥ sSL | 0 | 0 | 72 | 13 |
| sSL ≤ s ≤ sresat | 0.18 | 13 | 16 | 5 | |
| s ≤ sresat | 0.45 | 28.5 | 7 | 18 |