INFLUENCE OF FILLERS ON PROPERTIES OF LIQUID-GLASS COMPOSITIONS

Abstract

The article presents the results of studies of compositions based on sodium liquid glass and technogenic fillers of mineral and organic origin. As fillers materials were used that can affect the rheological properties and thermal transformation of liquid glass. The introduction of fillers increases the viscosity of the liquid glass compositions. To ensure the molding properties of compositions with a structural strength of 0.2 MPa, 65% or more of the filler is required. It was found that the molding properties of the compositions depend on type of filler. The greatest increase in the viscosity of the compositions is provided by the flask, slates combustible and lignite-bauxite, which limit the effect of free and adsorption water in the composition of the liquid glass. The effect of dispersity of fillers on the change in the molding properties of compositions was studied. An increase in the specific surface area of fillers from 350 to 550 m2/kg makes it possible to increase the structural strength of molding mixtures by 10 to 30%. To improve the molding properties of compositions characterized by high porosity, it is suggested to use combined fillers: cullet and organic filler; cullet and mineral filler containing pore-forming component (slates combustible, flask, lignite-bauxite, wastes of ore dressing).