REGULATION OF POROSITY OF FINE-GRAINED CONCRETES WITH A MIXTURE OF SURFACTANTS

Abstract

The study of the structural features of fine-grained concretes is aimed at determining the ability to regulate porosity with a mixture of surfactants. Purpose is to determine the effect of a mixture of surfactants on the porous structure of fine-grained concrete. To achieve the goal, the following tasks were set: to conduct experimental studies of the effect of a mixture of coarse and colloidal hydrophilic surfactants on the porosity of fine-grained concrete.Methodology. The study is based on the analysis of current trends in the theory of fine-grained concrete structure formation, the study of scientific literature, as well as observations and practice of testing fine-grained concrete samples in accordance with the requirements of standards. Results. The key aspects of the influence of a mixture of surfactants on the size of cavities in fine-grained concrete have been identified. It has been shown that the introduction of colloidal hydrophilic surfactants into water in very low concentrations leads to the effect of hydrophilic hydration, i.e. changes in the interaction between water molecules. Hydrophilic hydration in water helps to reduce the porous structure of concrete. The basic principles and innovative approaches to controlling the porosity of fine-grained concretes are revealed.Scientific novelty. New trends aimed at improving the quality and efficiency of fine-grained concretes have been identified, namely the management of their porosity by a mixture of surfactants. It has been proven that the introduction of a mixture of hydrophilic surfactants into the composition of fine-grained concrete leads to a significant change in the number of pores.Practical relevance. The results of the study can be used in the manufacture of high-quality fine-grained concretes for the design of new museum and exhibition institutions, modernization of existing ones, as well as to improve the organization of space and provide comfort for visitors.