Evaluation of clay properties of Zagustayskoe deposit for use in the manufacture of building materials

It is found out that the clay of the Zagustayskoe deposit belongs to the coarse clay raw materials when considering the content of fine fractions. The clay is represented in the dust-like form with the content of more than 50% of clayey particles. Due to the chemical composition the investigated clay refers to half sour ones, and due to the the mineralogi-cal composition it refers to a montmorillonite-kaolinite-hydromica clay.