Research Article
Hydraulic Conductivity of Polymer-Amended Sand-Bentonite Backfills Permeated with Lead Nitrate Solutions
Table 1
Properties of CB used in this study.
| | Index | CB | Test method |
| | Silt fraction (2–75 µm, %) | 100 | ASTM D 422 | | Clay fraction (<2 µm, %) | 69.3 | ASTM D 422 | | Classification | CH | ASTM D 2478 | | Liquid limit (%) | 269 | ASTM D 4318 | | Specific surface area (m2/g) | 252 | EGME method | | Swell index (mL/2 g) | 16.0 | ASTM D 5890 | | pH (water) | 10.33 | ASTM D 4972 | | Gs | 2.72 | ASTM D 854 | | CEC (meq/100 g) | 48.1 | ASTM D 7503 | | Ca2+ (meq/100 g) | 14.5 | ASTM D 7503 | | Mg2+ (meq/100 g) | 0.6 | ASTM D 7503 | | Na+ (meq/100 g) | 32.7 | ASTM D 7503 | | K+ (meq/100 g) | 0.3 | ASTM D 7503 |
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