Finishing Coatings Based on Modified Cement Colloidal Systems

Abstract

The processes of development of finishing coatings on the basis of cement colloidal systems are determined. It is shown that the introduction of modifying additives in combination with mechanical activation allows using the optimal technological parameters of processing to give colloidal cement composites the necessary properties and increase the resistance of protective decorative coatings. The joint activation of the components of colloidal cement adhesive with a modifying additive leads to an increase in the strength of the samples at all times of hardening. Studies have shown that modifying additives and fillers have a positive effect on the thixotropic properties of the system and contributes to the formation of the hydrate with colloidal particles, which leads to hardening of the reinforcement system of a composite. It is found that the addition of metakaolin enhanced the activity of fine cement systems. The use of modifying additives in the production of colloidal cement systems and solutions based on them for decorative coatings can significantly improve a number of indicators of the quality of solutions both at the stage of preparation and use in the implementation of the application processes, and at the stage of operation. Using the functional steps of modifying additives helps to control the quality of the solutions of decorative coatings (water demand, peel ability, water-holding capacity, survivability, etc.) and cement (porosity, average density, strength, deformability, etc.). The presented studies are related to the processes of modification of colloidal cement systems in order to obtain decorative coatings with increased technical and operational characteristics.