THE USE OF CONCRETE IN THE CONSTRUCTION OF SKYSCRAPERS

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    The construction of skyscrapers was started by the use of metal frames, which began in the USA at the end of the 19th century. Since then, buildings known as "Chicago structures" have spread widely around the world. For a long time, record heights were achieved only at the expense of using the unique properties of steel and improving construction technology. Despite many attempts in this direction, the use of concrete as the most common material in construction was almost impossible. The current situation changed radically after the discovery of the possibility of modifying concrete, i.e. giving it desired properties. The practical use of modified concrete has shown such advantages over steel that in recent years, almost all super-skyscrapers with a load-bearing core have been constructed with reinforced concrete.