The construction project for V-ZUG ‘s new production and assembly building called Zephyr Ost in the Zug Tech Cluster is the largest to date in which CO2-enriched concrete has been used. It is made from recycled concrete from the building materials group Holcim , which is enriched with CO2 using a neustark process. According to a press release , the construction work started on Wednesday. The building is scheduled to go into service in 2023.
For this climate-friendly concrete, CO2 from Switzerland is being used for the first time. The start-up based in Bern and spun off from the Swiss Federal Institute of Technology Zurich ( ETH ) in 2019, neustark extracts the CO2 from the wastewater treatment plant of the ara region Bern AG .
The recycled granulate for concrete production is processed by the recycling processing plant Arge EvoREC in Oberdorf NW. This is a joint venture between Holcim Kies und Beton AG and Zimmermann Umweltlogistik AG . The granulate is then carbonated by neustark using the dry process. The technology has been tested in the past few months and is now being used commercially.
With the use of 4,200 cubic meters of recycled concrete and the binding of CO2, a total saving of 71 tons of CO2 is achieved compared to conventional construction. That corresponds roughly to the annual CO2 uptake of 3500 Swiss firs.
“We are pleased to be able to come one step closer to our vision of climate-neutral and circular concrete production with the help of the innovative neustark process,” said Giovanni Barbarani, Head of Concrete Performance at Holcim Switzerland. “This project is a milestone on the way to sustainable building in Switzerland, also thanks to its regionality and short transport routes.”
The Metall Zug Group wants to create “a new piece of the city for an industrial ecosystem” in the Zug Tech Cluster. Other industrial companies, start-ups, technology-related service providers, training institutions and apartments are also to be located there.