Cement

Cement Plant.

Cement is a substance that can bind other materials together. It is made by heating limestone with clay and plaster (calcium, silicon, iron, and aluminum) and in some cases Pozzolanic ashes.

> The Assyrians and Babylonians used clay for this purpose, and the Egyptians advanced to the discovery of lime and gypsum mortar as a binding agent for building such structures as the Pyramids. The Greeks made further improvements and finally the Romans developed a cement that produced structures of remarkable durability. [1]

In 1824 the English mason Joseph Aspdin registered a patent on a cement that he called Portland Cement.

Cement has become one of the primary building materials for buildings such as skyscrapers.

## See also[edit]

* Sedimentary rock
* Asphalt
* Architecture

## External links[edit]

* Pozzolana

## References[edit]

1. ↑ A History of Cement