Influence of electrochemical treatment on a typical laterite
| Autor: | O. A. Agbede, A. L. Ayodele |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Materials science Sodium 030106 microbiology Metallurgy 0211 other engineering and technologies Soil Science chemistry.chemical_element 02 engineering and technology Building and Construction Calcium engineering.material Geotechnical Engineering and Engineering Geology Phosphate Cementation (geology) Electrochemistry 03 medical and health sciences chemistry.chemical_compound chemistry Mechanics of Materials Laterite engineering Phosphoric acid 021101 geological & geomatics engineering Nuclear chemistry |
| Zdroj: | Proceedings of the Institution of Civil Engineers - Ground Improvement. 171:103-111 |
| ISSN: | 1755-0769 1755-0750 |
| DOI: | 10.1680/jgrim.16.00030 |
| Popis: | The results of the undrained shear strength (Su) and stiffness (Vs) of electrochemically stabilised residual tropical laterite soil (RTLS) are presented. Calcium (Ca2+) and phosphate (PO43−) ions from calcium chloride and phosphoric acid, respectively, were injected individually and together into remoulded RTLS by applying 1 and 2 V/cm direct current electrical gradient for 5 d to facilitate cementation within the treated soil. Three different systems were employed using 1·0 M calcium chloride or 0·01 M sodium chloride as the anolyte and 1 M phosphoric acid or 0·01 M sodium chloride as the catholyte. Polarity reversal was also employed in some tests. The efficacy of the treatment was based on the soil Su and stiffness. The injection of Ca2+ led to a reduction in both the Su (90%) and stiffness (8%) of the treated RTLS. The injection of PO43− resulted in improvement in both the soil Su (151%) and stiffness (20%) of the treated RTLS. The study concluded that in stabilising the RTLS, injection of PO43− is effective whereas the injection of Ca2+ is not. |
| Databáze: | OpenAIRE |
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