Construction work with concrete is continuous, they also do not stop in winter. The complexity of winter work lies in negative temperatures, this is especially true for construction in the cold regions of the country, the Far North, for example.
Because, as you know, the combination of low temperature and high humidity is extremely destructive for concrete mixtures and structures made from them.
For such cases, there are special concrete additives against frost. They improve the properties of concrete mixtures and increase the quality of existing mortars. The use of such additives in working with concrete or reinforced concrete contributes to their durability and extends the service life of concrete structures.
The first antifreeze additives appeared almost immediately, with the beginning of the use of concrete in construction. And it is absolutely impossible to imagine working with concrete mixtures without such additives in the cold season. So why is this so if a high -quality concrete mixture made on the best equipment using the latest achievements of science is already good for use?.. It’s simple – in concrete mixtures there is always water, which, when frozen, forms ice crystals, and they, in turn, have a larger volume than the original volume of water. Considering all this, in concrete that has not yet hardened as required, areas with unacceptable high pressure are formed, which leads to a decrease in the strength of concrete products and the destruction of their structure. And the earlier the freezing of concrete occurs, the more its quality decreases.
That is precisely why it is simply necessary to use really high-quality concrete additives against frost, which are currently a huge selection provided by various companies.
And for convenience, you can calculate the approximate amount of antifreeze mixture consumption *
Air temperature Mixture consumption against frost, l
0 to -5 8
0 to -10 12
From 0 to – 15 16
* the consumption of the anti-frost additive is based on 400 kg of dry mix or 100 kg of ready-made cement.