Concrete is the most widely used man-made building material in the world. More than 5 billion tons of cement are produced annually worldwide, of which about 40% are used in China. Concrete made from this cement exceeds 10 billion tons per year. If you can imagine how much concrete has been used for centuries, it would be incredible. The history of cement and concrete dates back more than 5,000 years. If you trace the history of known geological cement, it can be traced back to about 12 million years.
Let us insist on men's participation but return to Egypt. Of course, the Egyptians hope that we can choose to use some Las Vegas precast concrete templates to create pyramids. Ancient Egyptians used mud and straw and plaster to bond their dry bricks. In order to bond this boulder, they used lime mortar. At about the same time, the Chinese used cement materials between the bamboo on board and the Great Wall.
The Greeks were the first to discover how hydraulic mortars work in the air and in the water. This was used to build waterproof cans, just as today's Hawaiian precast concrete uses similar concrete in a fully submerged prefabricated form. The Romans then refined the mortar and attributed it to the invention of concrete, adding the crushed brick aggregate to a mixture of lime putty and ash or brick ash. You can still see some of their works in the Coliseum, the Pantheon, the Great Roman Baths, and more outstanding examples of the durability of these new building materials.
Unfortunately, after the demise of the Roman Empire, it seems that concrete and cement production has stagnated. It was not until the seventeenth century that it really returned. Obviously, the first concrete structure ever built since the Romans was the Eddystone Lighthouse in England. The first concrete bridge was built in 1818 and is located in Suak, France. Then in England in 1824, a man named Joseph Asputin invented Portland cement. This cement is named Portland because it is similar to the stone of the quarry in Portland Island. It is still in use today, such as a prefabricated concrete utility vault.
Orignal From: Concrete is everywhere
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