The Influence of Activated Dispersed Additives on Electrical Conductivity of Anhydrite Compositions

Abstract

The paper presents the results of studies of the structure and properties of a fluorohydrite binder modified by a chrysotile nanotubes dispersion in a medium of calcium nitrate solution. It is shown that addition of this modifier into the anhydrite composition leads to a 106-fold decrease in electrical resistance. Microstructural analysis of the fluorohydrite composition showed changes in the morphology of new formations with the creation of crystalline hydrates of increased density. The presence of elongated nanocrystals on the surface of the hardened matrix was noted. In addition, IR spectrum absorption lines, prove the presence of calcium nitrate in the pore space of the composition, which contributes to a significant decrease in the electrical resistance of the developed composite.

Effect of Carbon-Containing Additives on the Properties of Fluoroanhydrite Compositions Used for Flooring

“…Compositions for antistatic flooring are developed, that are based on metal-saturated concrete with the addition of grinding sludge from bearing production [10]. Also known are the fluoroanhydrite compositions for flooring with low electrical resistance, which show that the addition of carbon soot in an amount of 7% by weight of fluoroanhydrite provides a decrease in the electrical resistance of the composition reducing its value to 100 Ohm [11], while the addition of a chrysotile dispersion based on 40% calcium nitrate in an amount 1.5% by weight of fluoroanhydrite reduces the electrical resistance by 106 times [12]. However, the improvement of the electrically conductive properties of the materials is usually accompanied by a decrease in the strength by 50-70% [11,12].…”

“…Also known are the fluoroanhydrite compositions for flooring with low electrical resistance, which show that the addition of carbon soot in an amount of 7% by weight of fluoroanhydrite provides a decrease in the electrical resistance of the composition reducing its value to 100 Ohm [11], while the addition of a chrysotile dispersion based on 40% calcium nitrate in an amount 1.5% by weight of fluoroanhydrite reduces the electrical resistance by 106 times [12]. However, the improvement of the electrically conductive properties of the materials is usually accompanied by a decrease in the strength by 50-70% [11,12]. Considering all the above, the aim of this research was to determine the electrical conductive properties of the previously developed plasticized fluoroanhydrate composition used for flooring and to select an effective technological solution for its modification, which would reduce the electrical conductivity of the material while maintaining high physical and mechanical characteristics.…”