Safety and Longevity Technologies of Infrastructure, Buildings and Facilities

Technologies of safety and durability are designed to provide the operation of facilities for the entire period of their functioning without creating a condition dangerous to life and health of people and without harming the environment The results of theoretical and experimental studies form the basis of technologies. In the article mathematical modeling of mass transfer in the processes of corrosion of the first type that occurs in concrete, when exposed to water with low rigidity, when the constituent parts of cement stone are dissolved and washed out by water, has been conducted. The obtained expressions allow to calculate the value of the concentrations of free calcium hydroxide in the thickness of the construction at any time and its content in the liquid phase, that gives the opportunity to predict the dynamics and kinetics of processes of corrosion destruction. The results are presented in graphical form.