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Хайрулина Олеся Игоревна261
стаж работы 19 лет
Россия, Сахалинская обл., село Ильинское

Величайшее изобретение в истории: бетон

The Greatest Invention in History: concrete Done by: Novikov Aleksandr

Again, traces of the use of concrete were discovered in Europe only 200 years ago. The concrete was a rocky mixture containing water, aggregate and binder. Thanks to the development of production technologies, such a substance as cement was invented

In 1796, the Englishman Parker obtained roman cement by firing a mixture of clay and lime – the first brand of cement in history. Cement mixed in certain proportions with gravel, sand and water formed concrete.

Cement began to be produced in Russia in the eighteenth century. In England – at the beginning of the nineteenth century, and it was there that hydraulic cement was invented. In France and Germany, the first cement factories were opened in 1842 and 1857, respectively. In America, cement production began in 1870.

In the modern construction market, concrete is represented by a variety of different types, different in their compositions and technical characteristics. There is ordinary, light, heavy, silicate, gypsum concrete; plastic concrete, asphalt concrete and many other types corresponding to various purposes and purposes.