Why do not we recommend concreting at a temperature below zero?
Despite the fact that the ideal conditions for concrete hardening are considered as ambient temperature + 20 ° C, it is sometimes necessary to refill it when the temperature is below freezing.
Concrete additives at temperatures below zero - principle of operation and composition
According to construction codes, the concept of winter conditions is slightly different from the generally accepted calendar. In particular, it is considered cold time to consider the conditions with an average daily temperature of about + 5 ° C and the possibility of nightfall at 0 ° C. As is known, at low temperatures, water crystallizes and hydration processes in cement-containing compounds slow down or they stop completely.
More about concrete
Hello! I do not think you have anything to worry about. At an average temperature of + 10 concrete it should reach approximately 40-50% of the design power within 5-7 days. As a tip, use a higher grade of cement with a lower slag content - this can heat up the concrete itself. Pour less water into the concrete (difficulty). The salt, of course, is a very powerful accelerator, but it affects the corrosion of the reinforcement. Somehow, we tested concrete samples with anti-freeze and without ...
At which temperature you can pour concrete
Additives in concrete at temperatures below zero will allow the foundation of the foundation even during the cold season to provide the necessary strength, reliability and durability of the structure. Although the most favorable environmental conditions for construction, plus, temperature + 3 ... + 25 ° C. However, in some cases it is not always possible to start building a house in the warm season, so you need to resort to special tools.
Casting of concrete at low temperatures
You do not have to be a builder who knows how important the foundation is. The strength and sustainability of the future structure depends on this. If you want a quality construction result, you must follow all the rules and standards. At what temperature we can pave the foundation and it is worth doing this work in cold - these are the common questions of people who are planning to build. In this material, all answers are supported by photographic materials and tables.