1 Introduction
2 Materials and Methods
2.1 Bacterial Growth Condition
2.2 Experimental Setup
2.3 Soil Properties
Properties | Values | Method |
---|---|---|
Specific gravity | 2.6 | ASTM D-854 |
Liquid limit (%) | 54 | ASTM D-4318 |
Plastic limit (%) | 35 | ASTM D-4318 |
Plasticity index (%) | 19 | – |
Hydraulic conductivity (cm/s) | 2.7 × 10−7
| Head (1982) |
Maximum dry density (g/cm3) | 1.49 | ASTM D-698 |
Optimum moisture content (%) | 31.15 | ASTM D-698 |
Unified soil classification | CH | ASTM D-2487 |
Mineral Composition | Kaolinite (Al2Si2O5(OH)4) | X-ray analysis |
Undrained shear strength (kPa) | 6 | BS 1377-7 |
3 Experimental Procedures
3.1 Sample Preparation
3.2 Electrokinetic Experiments
No | Code | Test activities | Date (days) | Normal polarity | Polarity reversal |
---|---|---|---|---|---|
1 | T1 | Injection of the calcium chloride solution into the anode chamber | 1–3 | √ | |
2 | T2 | Injection of the culture bacteria and urea into the cathode chamber | 4–7 | √ | |
3 | T3 | Injection of the culture bacteria and urea into the cathode chamber | 8–11 | √ | |
4 | T4 | Measurement of electrical potentials across the specimen and over the time | 1–11 | √ | √ |
5 | T5 | Vane shear test across the specimen | 18 | – | – |
6 | T6 | Measurement of water content and CaCO3 percent on each section | 18 | – | – |