Assembly Line

What is concrete made of?

Concrete takes gravel and crushed stone, silica sand, cement, water and rebar directly. Trace them back and you pass 26 made things on the way to 18 raw materials.

How concrete is made See it on the map

What goes straight in

From the ground: 18 raw materials

Made along the way: 24 things

Metals 7

Chemicals and fuels 15

Plastics and fibers 1

Electronics 1