Switzerland: Holcim Schweiz and Voliro have conducted the first official measurement drone flights at the Siggenthal integrated cement plant. The drone used took measurements to determine the steel wall thicknesses of the cement kiln and the cyclone preheater.

The companies have been testing using aerial drones to conduct inspection and maintenance work as part of Holcim’s ‘Plants of Tomorrow’ initiative. The drones developed by ETH Zürich spin-off company Voliro can be rotated around all axes by a special rotor system and can fly upside down. They are being tested in areas that are difficult for human employees to reach, such as the steel walls and casings of production facilities and silos.

Voliro was founded in 2019 and it is developing a new generation of flying drones for the inspection and maintenance of industrial plants. The drones can be equipped with a variety of sensors that perform visual, thermal and contact-based measurements. The drone's 360° design allows sensors to take measurements even on curved and inclined surfaces. This potentially allows hard-to-reach areas in a cement plant to be assessed without shutting down production. Holcim has been supporting Voliro's product development since 2019 and is providing the technology start-up with the infrastructure in Siggenthal for test flights. The building materials producer has also been supporting the project with its own knowledge about non-destructive testing.