Concrete

strong

Concrete

Concrete is made of sand, lime, and water.

Concrete was used to put interior walls to keep enemies away.

Concrete was used for a great effect in the construction of the dome of Romes Pantheon.

Concrete is so strong, it was used for buildings and factories.

Concrete is strong when being squeezed and weak when being stretched.

Why has concrete played such a big role?

A long time ago countries have used walls of concrete to keep away from enemies. The great wall of China was made out of concrete and it was very successful. Concrete today is used in factories and is used for today roads. Concrete has been a really successful invention.

Strong!

Who made concrete?

John Smeaton in 1756