Research Article
Impact of In Situ Soil in Soil-Bentonite Cutoff Wall Backfill on Compressibility and Hydraulic Conductivity
Table 1
Properties of constituted soils.
| Property | Standard | Constituent soil | Sand | Nanjing clay | Ca-bentonite |
| Fines fraction, FF | ASTM [11] | 0 | 72.5 | 100 | Clay fraction, CF | ASTM [11] | 0 | 17 | 49 | Specific gravity, Gs | ASTM [12] | 2.65 | 2.74 | 2.63 | Liquid limit, (%) | ASTM [13] | — | 34.5 | 269.4 | Plastic limit, (%) | ASTM [13] | — | 20.4 | 34.0 | Classification | ASTM [14] | SP | CL | CH | Swell index, SI (mL/2 g) | ASTM [15] | — | 2.2 | 16.5 | Primary clay mineral | 1 | — | Illite (53%) | 2Mont. (82%) |
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1X-ray diffraction analysis. 2Mont., montmorillonite.
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