Publication at Faculty of Science |
2011
Abstract
The results showed that while German Friedland clay was not noticeably affected by the hydrothermal treatment, Wyoming bentonite and Chinese bentonite lost a significant part of the swelling pressure and experienced an obvious increase of hydraulic conductivity and stiffness. The most obvious chemical and mineralogical changes were an increase in Si content and the precipitation of silica, gypsum and kaolinite in the most heated parts of bentonite samples.
The precipitation of silica was believed to be the cause of the stiffening.