Sopov V. The methodological basis of the research and management of the microstructure of cement stone in concrete

Dissertation for the degree of doctor of technical sciences, specialty 05.23.05 - building materials and products. - Kharkov national University of Construction and Architecture, Kharkov, 2013. On the basis of precise low-temperature scanning microcalorimetry apparatus involving thermodynamics of phase transitions of the pore fluid in confined spaces has developed a methodology of determining of parameters of the microstructure of cement paste - thermoporometry, analysis of processes of the ice formation during the freezing cement stone, estimate the kinetic and thermodynamic characteristics of hardening binding systems. The basic laws of microporosity formation during solidification of mono- and multimineral binders are set, they are based on the ratio of gel and capillary micropores and changes in their total volume in time. The methods of measuring and predicting value degree of hydration of the binder, and specific values of the volumes of the pore fluid of different forms of communication are developed on the basis of the theory of multilayer adsorption and data thermoporometry. The correlation is set between the kinetics of the hydration process in hardening concrete structure formation and dynamics of cement. Experimentally identified opportunities technological control of microstructure parameters of cement and concrete by supplementation of different nature, the changes of temperature and humidity conditions of curing, etc. Keywords: differential scanning microcalorimetry, thermoporometry, dynamic microstructural index, ice formation, thermodynamics of phase transitions.