Table 1.
Geotechnical and environmental geotechnical characteristics of the studied dispersive soil.
| Properties | Measured values | Methods |
|---|---|---|
| Clay fraction < 2 μm (%) | 51 | ASTM D422 |
| pH (1:10; soil: water) | 10.8 | ASTM D4972 |
| EC (1:10; soil: water) | 1.66 | ASTM D4972 |
| Carbonate content (%) | 11.5 | Hesse, 1971 |
| CEC (cmol/kg-soil) | 28.36 |
Hendershot and Duquette, 1986 |
| ESP (%) | 72 | Sherard et al.,1977 |
| SSA (m2/g) | 36.28 | Eltantawy and Arnold, 1973 |
| Strength Parameters | ASTM D3080 | |
| C (kPa) | 25 | |
| Friction angle φo | 15 | |
| UCS (kPa) | 410 | ASTM D2166 |
| Liquid limit (%) | 36 | ASTM D4318 |
| Plastic limit (%) | 18 | ASTM D4318 |
| Plasticity index (%) | 18 | ASTM D4318 |
| Optimum water content (%) | 18.4 | ASTM D698 |
| Maximum dry density (g/cm3) | 1.78 | ASTM D698 |
| Percent Dispersion (%) | 84 | ASTM D4224 |
| Crumb (Final Grade) | 4 | ASTM D6572 |
| USCS classification | CL | ASTM D422-87 |
| Mineral composition using XRD analysis | Kaolinite, Illite, Calcite, Quartz, Dolomite, Feldspar | ASTM D2216 |