Abstract
In order to investigate the effect of exchangeable cations on rheology of clay body, plasticity of the synthetic kaolinite body whose surface cations were replaced by a particular one were measured by using Pfefferkorn methods. Unfrozen water (binding water) on the synthetic kaolinite surface were also measured by using low temperature differencial scanning calorimetory to estimate the binding forth of cations with water. Following results were obtained.
1) The plasticity is encouraged by exchanging cations on synthetic kaolinite surface.
2) Thickness of unfrozen water on the kaolinite surface is about 9-13Å.
3) Plasticity and thickness of unfrozen water film on the synthetic kaolinite closely relate to ionic radius and hydration energy of exchanged cation.
