Study of thermodynamic processes in a concrete mixture hardening in winter conditions

Abstract

The aim was to study thermodynamic processes taking place in a concrete mixture hardening in winter conditions. Laboratory studies show that different ways of concrete paving affect the quality of the work performed. To study thermodynamic processes, a stand was used that controlled the temperature fields in different places of the volume height of the concrete product and heating elements with a positive coefficient of thermal resistance. The results of the distribution of temperature fields across different places of the volume height of the concrete mixture were analysed, depending on the different methods of concrete paving used. The studies have shown the need to tentatively warm up the base of constructions to reduce the time of concrete mixture hardening, and additionally to warm up the mixture when paving essential structures. The experiments have shown that using heating elements with a positive coefficient of resistance during concrete works helps to provide the necessary quality of repair and construction work in low-temperature conditions.