Abstract
This paper presents the results of laboratory tests of the effects of high pressure on the microstructure of clay particles. They were made of an aqueous suspension of clay, which was pressurized at 200MPa. High pressure was obtained in the original high-pressure test stand. The microstructures were examined in the scanning electron microscope (SEM). The changes were defined by comparison of the data before and after adding pressure in the high pressure chamber. The tests results show that irreversible mechanical changes occur in the microstructure of the clay particles and some minerals under the pressure of 200MPa, manifested by cracks and disintegration of mineral particles.
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