3-D printing a building
The gantry, a moveable framework supporting the printhead from the Automated Construction of Expeditionary Structures, a 3-D printer, applies a layer of concrete with aggregate to a wall section of a barracks hut at the Construction Engineering Research Laboratory in Champaign, Illinois.

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Photo by: Mike Jazdyk |  VIRIN: 170620-A-MV376-848.JPG