The Indian Army, working with IIT Hyderabad under Project PRABAL (Portable Robotic Printer for Printing Bunkers and Accessories), has taken a major step forward in defence infrastructure by deploying On-Site 3D Concrete Printing Technology, according to an official release. This capability, already tested in other operational zones, has now been successfully used by the Trishakti Corps in Sikkim and nearby forward areas.

The indigenous robotic 3D concrete printer—featuring a robotic arm, circular mixer, piston pump, and generator—is fully portable by vehicle and designed for fast movement across mountainous terrain. Created specifically for use in forward locations, it enables rapid construction of bunkers, sentry posts, and protective shelters. These printed structures have passed live ballistic testing, confirming their durability and protective capability.

The release noted that 3D concrete printing offers several key operational benefits, such as customised designs, improved blast and ballistic resistance, higher compressive strength, better quality control, efficient use of local materials, and quick construction within tactically acceptable timelines. It also allows for terrain-specific structures and advanced camouflage. The Army’s ongoing adoption of on-site 3D printing marks a major advancement in engineering and readiness, supporting fast, sustainable, mission-focused infrastructure development in difficult environments.