Long-term durability of concrete structures

Abstract

The issue of long-term strength of concrete in construction structures is considered, taking into account the features of concrete structure and the impact on the durability of concrete and force resistance to deformation and destruction. An approach to assessing the long-term strength of concrete as a thermodynamic system has been proposed. The effect of the growth of concrete strength at an early age when firming it in different temperature and humid conditions is shown to change the initial module of concrete deformations in time due to the physical and chemical reaction of hardening. The article proposes an approach to building the functions of aging concrete based on the cynetics of the physical and chemical reaction of cement hydration in a concrete mixture using its stehometry. The form of aging functions is presented using the analysis of the chemical reactions of cement hydration in concrete.