Concrete


 * [[image:ConcreteRecycler3.jpg width="161" height="239" align="right"]]Concrete is a construction material composed of cement and water. This material is used to make architectural structures, foundations, bridges, highways, pavements and bricks.

Nowadays, concrete is more used in the world due to that it's durable and safest material construction.

Concrete have high resistance at compressive and low tensile. The concrete structure will split to long duration due to tension and contraction of this material; though it offers fire resistance and it have 100 years of useful life. Likewise, the use of concrete reduces the risk of structural collapse due to its vertical stiffness.**


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 * [[image:lupa-buscar.jpg align="left"]]Wikipedia:** @http://en.wikipedia.org/wiki/Concrete