Establishment of pore types in the porous structure of expanded Kvareli clay-slate

The research goal is to establish number and types of pores of porous material (keramzit) obtained from natural and artificial expanded Kvareli slate. The dependence of open porosity values of initial natural and thermally expanded clay-slates on their grain sizes and number of pore types in materials under study has been established. Averaged values of true and apparent densities have been determined for natural Kvareli slate, and keramzit obtained through its high-temperature expansion. It was established, that the expanded Kvareli slate is characterized by 80 % porosity, while the ratio of closed and open pores is approximately presented in 7:1 proportion. (author)