Concrete is one of the most sought-after materials in construction. It differs in durability, reliability and long service life. However, in violation of the use of technology, the structure of the concrete solution can be broken, which leads to cracks and fractures throughout the building.
Water crystals are formed in the concrete solution, which prevent the mixture from drying out by reducing the average daily air temperature below 5C. Frozen liquid creates internal pressure, leading to the formation of cracks and irreversible loss of strength. Therefore, during its curing with special attention it is necessary to monitor the temperature and humidity.
It is considered that construction works are carried out only in the warm season, but in practice it turns out differently. There are deadlines for the delivery of facilities, and downtime sometimes turns out to be more expensive than continuing construction in adverse weather. Therefore, special technologies have been developed to maintain comfortable conditions for the maintenance of materials. For a concrete mix, this is a whole complex of measures aimed at heating it and preventing freezing.
There are several types of heating a concrete mix for its proper hardening. The most common:
Consider the advantages and disadvantages of each.
The essence of the procedure consists in immersion in a concrete mixture of electrodes of various designs - plate, rod, string. This is a relatively simple method that is implemented easily and quickly, but has several disadvantages:
Besides the fact that the technology of heating by electrodes implies the obligatory control of competent specialists, the process itself consumes a large amount of electricity. 1 electrode requires at least 45A, and the number of their connection to the transformer is significantly limited. In addition, as the solution dries, the costs increase.
The essence of the method is that the concrete layer itself insulated wire is laid, which heats up and carries out the heating of the solution. Unlike the previous method, it is more economical in cost and limited only by the transformer power. Of the minuses, the following can be noted:
This method is based on covering the concrete elements with an awning that ensures a uniform increase in temperature. The disadvantages of this method include the relatively expensive cost, but it overlaps with a number of technological advantages:
Concrete heating is an important technological process that needs to be approached with particular attention. After all, the service life, durability and reliability of the future construction depend on it.