Another forward step has been made in 3D printing as concrete can now be printed as well. A university specializing in technology, TU Eindhoven in Eindhoven, Netherlands, uses a apparatus that creates concrete objects of up to 36 ft. long, 16 ft. wide, and 13 ft. high.

Here's how the machine which resembles an overhead hoist crane with a swivel head that is attached by a hose to a concrete mixer and pump works:

In traditional construction practices, concrete is poured into an existing mold. This 3D printer will push out concrete in a more free-form, customizable way, allowing for smaller and more detailed construction, as well as the use of different mixes of concrete in a single piece.

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