Scientists in Singapore have created a pair of robots that can work in unison to 3D print concrete building structures.

According to reports, the robots were created by scientists at Nanyang Technological University.  They can be programmed using a computer and use a technique called “swarm printing” to create designs without crashing into each other.  The robots use a specially formulated cement mix designed specifically for use in 3D printing.  The machines built the small structure in eight minutes and it took about a week to achieve its full strength.

The ability to use multiple robots could make it easier and more efficient to 3D print larger concrete structures.