Calculation of Crack Formation During the Thermal Stress State of Concrete Masses and Development of Measures to Improve the Operational Properties of Concrete

Abstract

The modeling of the thermally stressed state of the building foundation slab is considered. The performed calculations took into account the occurrence of stresses as a result of heating the concrete mass during cement hydration. To simulate the thermal stress state, the specialized Midas Fea software package is used. In carrying out the research, materials from articles on the construction and examination of the current state of buildings and structures made of concrete and fiber-reinforced structures were used. At control points, diagrams of changes in temperatures, stresses, and crack formation coefficients in relation to the time of curing are obtained. The isopoles of temperature distribution and crack formation coefficients over the volume of the studied array are obtained. Measures have been developed to improve the operational properties of concrete, including engineering and technical recommendations to reduce the negative impact of temperature differences on the manufacturing process of concrete mixtures and foundations.