MIT engineers use 3D-printed steel to repair corroded bridge
The big picture: According to the American Society of Civil Engineers, more than half of the 623,218 bridges in the US are in a state of significant deterioration. Getting them back in good standing would cost north of $191 billion – no small chunk of change. For researchers at MIT, finding a more cost-effective solution using modern technology is a worthy cause. Using a laser-based additive manufacturing technique called cold spray, the team successfully repaired a corroded section of a bridge