Review article

Various modifications of the crystal structure of gypsum are considered, their wide variety is noted. The effect of an innovative carbon nanomodifier with a diamond structural lattice on the crystal structure and properties of gypsum has been investigated. It is established that a carbon nanomodifier of high purity (99.99%) in the form of a liquid-phase system consisting of bi-distilled water and nanodiamond particles, obtained by hydrodynamic cavitation, changes the shape of gypsum crystals. Herewith, a heteroepitaxial mechanism of formation and growth of gypsum crystals on nanodiamond particles in a spherical octahedral shape previously unknown for gypsum is noted. The effect of the addition of a liquid-phase nanodiamond system on the setting time and normal density of gypsum dough based on popular industrial binders G-6 and G-16 is shown. The physical and mechanical properties of nanomodified gypsum materials are presented in comparison with gypsum obtained on the original gypsum binders.