ON VISCO-PLASTIC CHARACTERISTICS OF HETEROGENEOUS COMPOSITIONS IN THE PROCESS OF THEIR MIXING

Abstract

The trend of expansion of the raw material base and the use of various inert and active additives are characteristic for almost all branches of production that use mixing process and are considered by researchers in the framework of various scientific areas in corresponding fields, including in the food industry to evaluate the technological and consumer characteristics of a variety of products using different methods and control means. The process of mixing of liquids and solids, especially on an industrial scale, has its problems. The search for solutions, which allow avoiding the typical problems of mixing, meanwhile maintaining lower labor costs, expenditures for cleaning, recycling and energy resources, generates one of the objectives of the quality management system in terms of the development of an effective set of optimization elements of viscoplastic properties of heterogeneous compositions. The research on filler with different grain-size content made with the use of simplex lattice method of experiment planning shows that the studies of mass visco-plastic properties at the stage of mixing allows determining an optimum grainsize content that takes into account both the creation of a continuous spatial network of the binder in the composition and the density of its packing material. Along with the content of the binder, its viscosity as of the mass component also affects the visco-plastic properties of the mass. Promising binders are those of increased degree of aromaticity (high-temperature), because the low-molecular components are mainly evaporated during the subsequent treatment, weakening the structure of the material. During the process of mixing the use of plasticizers and mineral supplements, which are regulators of chemisorption interaction of the binder and filler, providing improved density-limited physical properties and reduction in energy consumption, is efficient. The quality of products on the basis of heterogeneous compositions containing liquid and solid phases can be assessed by the correlation dependences between visco-plastic properties of mass at the stage of mixing and the properties of the final product of these masses.