The US military’s research arm, DARPA, is exploring ways to 3D print concrete underwater using seafloor sediment and seawater. The initiative aims to overcome current limitations in maritime construction, which is often slow, costly, and environmentally intrusive.
By leveraging autonomous systems, DARPA envisions technology that could repair ports, seawalls, and piers, protect undersea cables, and even build artificial reefs.
DARPA Explores 3D Printing Concrete Underwater
The agency is seeking input from civilian industry and academia to develop advanced equipment capable of operating in shallow waters and depths up to 100 meters.
The long‑term goal is a fully autonomous deepwater system that uses AI to determine the best sediment‑water mix for construction in different environments.
This effort comes as US maritime infrastructure faces significant challenges.
Reports have highlighted that nearly half of Coast Guard facilities are past their expected service life, while saltwater, storms, and corrosion continue to damage critical logistics hubs. DARPA has previously funded projects on self‑repairing concrete inspired by biological systems, underscoring its interest in resilient infrastructure.
If successful, underwater 3D printing could revolutionize military logistics, offering rapid, autonomous repair capabilities in contested environments and reducing reliance on traditional, resource‑heavy construction methods.
Read the original article on Business Insider
