Mechano-chemical processes and physico-chemical activity of cement-mineral dispersed sys-tems in concrete technology

Abstract

An effective way of controlling the structure formation and obtaining concretes with the required properties is the directional regulation of processes occurring as a result of the physico-chemical interaction of raw materials components during their preparation and joint application. For cement-mineral dispersed concrete systems, it is important to study the physical and chemical activity of raw materials components, taking into account the mechanical and chemical processes implemented at the stages of their preparation technology - grinding, mixing, etc. The purpose of the article is to assess the influence of mechanical and chemical processes in the preparation of components on their physico–chemical activity in the composition of cement-mineral dispersed concrete systems. The paper substantiates the methodological approach of research and the choice of raw materials components of cement-mineral dispersed concrete systems. It has been experimentally established that as a result of mechanical and chemical processes of powdering (grinding) and an increase in dispersion, the physico-chemical activity of a unit of mass of mineral components and cement increases, while the physico-chemical activity of a unit of surface area decreases. This phenomenon is largely due to structural changes, which affects the change in the properties of dry and hardened cement-mineral and cement systems. The implementation of the methodological approach of research based on the analysis of mechanical and chemical processes and their influence on the physico-chemical activity of cement-mineral systems is important in the development of effective methods for controlling structure formation and obtaining concretes with the required properties through targeted regulation and optimization of formulation and technological parameters.