Abstract
The article provides a comprehensive coverage of the problem of the influence of negative temperatures on the properties and structure of concrete during its early freezing. Studies have established the regularity of the content of the liquid phase in the cement gel at low temperatures, as well as the strength gain of cement. Water under ordinary conditions freezes at 0 ° C, and it would seem to make no sense to talk about cement hydration, but the properties of thin films of water and the change in their physical properties allow cement hydration to occur. Such water freezes at more negative temperatures, and being in a liquid state can react with cement minerals