Carbon Prestressed Concrete : resource-saving and climate-friendly concrete components

Instead of steel as usual, the concrete of Carbon Prestressed Concrete (CPC) panels is reinforced exclusively with prestressed carbon fibres. The high-performance thin concrete elements thus enable material savings of up to 80 percent, depending on the design, and reduce the component’s CO2 footprint by up to 75 percent.

Carbon Prestressed Concrete : resource-saving and climate-friendly concrete components

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The smaller amount of concrete massively reduces the self-load of the structure, lowers the CO2 footprint and also significantly reduces transport costs. A further CO2 reduction of the component results from the use of significantly smaller quantities of carbon instead of large quantities of steel (factor 30). The thin elements can be manufactured industrially and in large formats and then cut to size. In addition to simple cuts, freely shaped cuts, surface treatments such as milling and brushing, drilling, slot milling or pockets are also possible.

The CPC panels were developed by the Swiss company CPC AG. Holcim Germany or its subsidiary Vetra Betonfertigteilwerke GmbH cooperates with the company in the market launch of the innovative components and further optimises their design (e.g. via concrete technology and composition). In Essen near Oldenburg (Lower Saxony), a state-of-the-art large-scale plant for CPC panels is being built, which will start production before the end of 2022. CPC AG is supplying the technology and the carbon fibres, for the production of which a new plant has been built in Switzerland.'”Building more with less, that is our credo. And with CPC we are taking a big step in this direction,’ comments Thorsten Hahn, CEO Holcim Germany.

Milestone abZ

“For these innovative concrete elements, a wide range of possible applications is opening up in the construction sector – for example, for filigree and sustainably produced balcony slabs, stairs, bridges and freely designed façade elements. This will interest many planners and architects who are looking for new, more sustainable solutions for their customers,” explains Vetra managing director Stefan Gramberg.

With the first general building approval (abZ) for prestressed carbon concrete in Germany, which was granted at the end of 2021, the resource-saving and climate-friendly concrete components with CPC technology can now also be used without complications. The approval includes a complete structural design of the CPC slabs, which can be used to individually design many structural components, such as stair treads, balcony slabs and exterior wall cladding. Modular bridges can also be created easily and in a resource-saving way with CPC panels.

“We want to continue to grow together – with this new building idea for concrete with an incredibly wide range of applications. The exclusive cooperation with the Holcim Germany Group now enables us to further optimise the idea, implement necessary investments and penetrate a significantly larger market with the innovative thin concrete elements,” says Prof. Josef Kurath, member of the Board of Directors of CPC AG and also the developer of this novel production method and the associated innovative joining technologies.

Holcim Germany also received the bauma 2022: International Innovation Award for their CPC – Carbon Pre-stressed Concrete.

More information www.holcim.de