Concrete

In construction, concrete is a composite building material made from the mixture of aggregate and a cement binder.
The most common form of concrete consists of Portland cement, mineral aggregates and water.
Concrete does not solidify from drying after mixing and placement, the water reacts with the cement in a chemical process known as hydration. This water is absorbed by cement, which hardens, gluing the other components together and eventually creating a stone-like material. When used in the generic sense, this is the material referred to by the word concrete.
Concrete is used more than any other man-made material on the planet. It is used to construct pavements, building structures, foundations, and motorways/roads, overpasses, parking structures, brick/block walls and bases for gates, fences and poles.