A few introductory words about refractory concrete
As a rule, this type of concrete is used in the construction of furnaces, chimneys, both in housing and in industrial construction. Manufactured according to all rules, the material provides reliable protection and safety. Depending on the purpose, specialists purchase various types of concrete - cellular, dense or lightweight.
Such concrete can also be used as a thermal insulation material. Due to the fact that you need to work with the material in the same way as with conventional concrete, the costs for construction work are reduced. This material perfectly withstands the temperature drops, does not change its quality after heating, that's why heat-resistant concrete becomes the best option for the construction of specialized objects.
Developments for critical temperature conditions
In practice, conventional concrete mixes do not tolerate high temperatures. Even those options that are considered to be among the most high-quality and expensive, can not guarantee safety at a temperature exceeding 150 degrees. The material begins to crumble, to lose shape, as a result of which the whole structure suffers.
For this reason, specialists have developed special compositions that preserve properties in conditions of high temperatures. To date, there are so-called highly refractory concretes used in conditions where the temperature exceeds 1770 degrees, refractory variants that operate with temperatures from 1580 to 1770 degrees, and heat-resistant , their limit is 1580 degrees.
Any heat-resistant concrete consists of base and filler, in the manufacture of such material, specific elements are used: liquid glass, aluminum cement, expanded clay and others.
Refractory version, which includes alumina, does not react to acids, which gives it additional advantages.
Evaluating the effectiveness of the material, we can confidently say that the use of heat-resistant concrete is much more economical than buying heat-resistant boards. The fact is that when laying tiles, a specialist is forced to use a special solution that breaks down under the influence of temperatures. With regard to concrete, such surprises can not occur.
Features of choice of heat-resistant concrete
In order to make concrete refractory and suitable for use in places with elevated temperatures, for example, for the construction of a furnace, asbestos, alumina cement, liquid glass, and also barium cement are added to the composition. All these additions become one with a common hardening component, and are also refractory.
The composition of ordinary concrete includes elements that, when heated, undergo a process of dehydration or dehydration. The concrete structure subjected to such testing quickly bursts, it breaks down, it is almost impossible to stop the process. To prevent such trouble, in places with high temperature it is necessary to use refractory compounds.
Considering high-temperature concrete, we can note the increased content of impurities in its composition. Each element fulfills its role, connecting the material with increasing temperature, making it more durable. Depending on the requirements, choose a material with the addition of a specific element, so some fillers can withstand temperatures as low as 1580 degrees, while others perfectly show themselves even when exposed to a temperature of 1770 degrees.
