Optimization of textile-reinforced concrete slabs with internal honeycomb structure

High emissions from cement production, labor shortages and high labor costs are currently among the biggest challenges facing the construction industry. Prefabricated components with high material efficiency in terms of concrete can provide a solution to these problems. The textile-reinforced concrete slab with an internal honeycomb structure is being investigated as a possible component for building construction, for example as a prefabricated floor element.

Textile-reinforced concrete slabs with an internal honeycomb structure offer considerable savings potential, as the concrete is only used in those areas where it is required for the load-bearing capacity. The top and bottom of the slab each have a concrete cover layer with carbon fiber reinforcement. In the middle are hexagonal fillers arranged 5 mm apart. Concrete webs fill the cavity between these fillers and connect the two surface layers. This allows the concrete to absorb compressive stress in the compression zone of the slab. In the tensile zone, the reinforcement absorbs the tensile stress. Concrete is saved in areas of the slab that are subject to less stress.

The load-bearing capacity of the developed slabs is verified both by numerical modeling and by tests on small prototypes.