Building with CPC carbon concrete slabs, an entirely new type of concrete construction – method, engineering, designing

The CPC construction method is based on the semi-finished CPC carbon concrete slab. The CPC slab is produced at the plant in thicknesses ranging from 20 mm to 69 mm and in sizes of up to approx. 4m x 15 m. Using CNC plants or simple machines, the CPC slabs, which have been prestressed with carbon strands in a fine-meshed, multi-layered and endless pattern, can be processed, used on the construction site or assembled into more complex structural elements.

The slabs can be cut to any given size or shape. Within no more than a few centimeters from the cutting edge, the full prestressing force is applied to the slab, enabling it to be subjected to flexural and shear stresses in any given direction.

Since 2012, CPC slabs have been used in Switzerland as balcony slabs, staircases, platforms, as replacement pavements on pedestrian bridges, for elevated slab pavements and many other purposes. Entire structures have also been completed using CPC slabs, such as pedestrian bridges or bicycle shelters. Around 170 projects have been realized to date.

A general technical approval will shortly be granted by the German Institute for Structural Engineering (DIBt), permitting the use of CPC slabs in Germany as slabs exposed to flexural and shear loading.

CPC construction is exceptionally resource-efficient, saving between 50 % and 80 % in resources and weight compared to conventional concrete construction methods. In addition, the tremendous reduction in weight has a positive influence on the overall structure, in particular when carrying out reconstruction measures.

Research has already begun regarding the use of CPC slabs in tunnel construction, road bridge construction and for the entire supporting structure in building construction. Initial investigations show that, in terms of sustainability, a quantum leap has been achieved with this new construction method. Cost analyses show that, even with current prices of material, CPC construction will not be more expensive in the future than conventional reinforced-concrete construction. CPC construction does not sacrifice individuality in comparison with poured-in-place construction.


Related articles:

Issue 06/2022

CPC – a new concrete construction method: Highly resistant plug-in connectors between CPC slabs

The CPC-Optima (CPC = carbon-prestressed concrete) modular bridge system is suitable for pedestrian and cycle bridges. This trough bridge design comprises a deck slab and two lateral beams. The beams...


Innovation: CPC concrete slabs for the construction industry

CPC (carbon prestressed) concrete slabs are based on a new technology that evolved from a long-term research project conducted by ZHAW and the company Silidur AG, in Andelfingen, Switzerland. The...

Issue 06/2023

On the pathway to the first building in CPC construction

The CPC construction method is based on a totally new approach in load-bearing concrete construction and it differs from the conventional reinforced-concrete construction method fundamentally....

Issue 06/2022

Experimental investigations on punching shear of flat slabs made of carbon-reinforced concrete

So far, European standards do not stipulate generally applicable verification rules for the punching shear of slabs made of carbon-reinforced concrete. In addition, regulations on the structural...


ModularesBauen congress 2022: Expanding knowledge and networking

The 2nd ModularesBauen congress was held in Aachen in September 2022. The event was co-hosted by Aachen Building Experts e. V. Its members include various institutes of RWTH Aachen University as well...