(New Scientist) US army to 3D print concrete buildings and bridges in disaster areas

The US Army Corps of Engineers can now print concrete barracks, bunkers and other structures in challenging environments. Its Automated Construction of Expeditionary Structures (ACES) programme has also drawn up plans to create the world’s first 3D-printed vehicle bridge, and prototype printers should be in the field next year….

“Our priority was to develop a capability utilizing 3D printing technology for use in an expeditionary environment, specifically suited for military purposes,” says Megan Kreiger, program manager for additive construction at the US Army’s Engineer Research and Development Center in Vicksburg, Mississippi. “That means it has to ship in a container, it has to use local materials, it has to work in a dirty environment and it needs to be able to take a beating while still remaining reliable.”

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