FORMATION OF THE STRUCTURE AND PHYSICAL AND MECHANICAL PROPERTIES OF NON-AUTOCLAVED FOAM CONCRETE WITH AN ACTIVATED SOLUBLE COMPONENT

Abstract

This article presents the results of an experimental study on the influence of mechanochemical activation of the mortar component on the physical and mechanical properties of non-autoclaved foam concrete. The relevance of the topic is обусловлена the need to increase the strength and operational reliability of cellular concretes while simultaneously reducing cement consumption and the energy intensity of production. The object of the study is non-autoclaved foam concrete, and the subject is the processes of structure formation and strength development under conditions of mechanochemical activation. The aim of the study is to establish the patterns of influence of combined mechanical and chemical activation on material properties and to determine the possibilities for their regulation. The Box-Behnken plan is applied. The study employed methods of physical experimentation, experimental design (in particular, a multifactor approach), and analysis of the obtained dependencies. The theoretical basis includes the works of domestic and foreign researchers in mechanochemical activation and concrete technology. It has been established that the use of high-speed mixing in combination with chemical accelerating additives ensures a redistribution of structural changes in the solid phase, intensifies cement hydration processes, and promotes the formation of a denser material structure. The obtained results confirm the possibility of a significant increase in the strength of foam concrete up to 325% and controlled regulation of its properties in a wide range, which opens up prospects for effective use of the material in modern construction.