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The effect of NaCI concentration on the physico-chemical properties of clays

UDK: УДК 624.131.43

I.А. Zvereva, V.I. Kachenov

The article presents data on the swelling of clay soils of kaolinite and montmorillonite compositions, depending on the concentration of brine (15%, 30%, 35%). The nature of swelling of clays is associated with the formation of loosely bound water in the diffuse layer of the colloid micelle. As a result of the swelling in the 30% brine solution, the diffusion layer has the maximum power, the cations from the solution compensate for all colloid charges, hence the swelling value is of the greatest importance. In kaolinite clay, the increase in the concentration of the salt (C) solution occurs uniformly in time (t), in montmorillonite clay, the time (t) of the formation of the maximum value of the swelling strain decreases with increasing concentration of the salt (C) solution. Taking into account the mineral and granulometric composition of clays, the swelling deformation in Lobanovsky montmorillonite is less than in kaolinites.

Файл: И.А. Зверева, В.И. Каченов.pdf, 5 pag.

Рубрика: Инженерная геология
Выпуск №8: По материалам IX Всероссийской молодежной конференции аспирантов, молодых ученых и студентов «СОВРЕМЕННЫЕ ТЕХНОЛОГИИ В СТРОИТЕЛЬСТВЕ. ТЕОРИЯ И ПРАКТИКА», (Часть I ,июнь, 2017)