Stonehenge in England, the Great Pyramids of Giza, the Peruvian citadel are three striking examples of the durability of stone structures that have stood for hundreds or even thousands of years. Stone is one of the oldest and most durable building materials, but it is not easy to work with and also difficult to transport.
Therefore, a kind of "liquid stone" was created - concrete, which makes it easy to build buildings and structures of any shape and size. However, concrete that works well in compression does not perform well in compression. This problem can be solved by reinforcing concrete. Steel reinforcing bars create a strong frame for concrete, resulting in a new composite material, reinforced concrete. An important component of the material that works well at any voltage, and allows it to be used in large volumes when performing construction work. Of course, in addition to fittings in construction and industry, shaped pipes, square pipes, steel pipes and various types of rolled metal are also widely used.
In theory, other types of materials could be used to strengthen concrete. But, as a rule, we use steel, because it expands and contracts under different weather conditions (in hot and cold weather) about the same as concrete itself, which means that this prevents the concrete from cracking. Also, for the construction of structures in contact with an aggressive environment, it is possible to use stainless steel reinforcement, but for the majority of facilities, steel reinforcement is the best option in terms of price-quality ratio, which determines the durability of structures.
