Precast and demountable reinforced-concrete composite beams for hybrid constructions

The goal of circular economy is the transition from a linear, open economy to a circular, closed economy in which materials retain their value, resources are preserved and landfill waste avoided. Peikko defines a circular solution as projects that include products and processes that enable disassembly and reuse. Product information is retained over the entire life cycle of the components.

Peikko defines hybrid construction as the efficient combination of various materials, components and structural systems to optimize safety, speed, space and sustainability.

The combination of steel-concrete and wood-concrete elements offers significant advantages such as high load-bearing capacity, lightness and resource preservation. Deltabeam Green enables flexible use of building materials where they are best used. A combination can be realized with all slab constructions such as prestressed concrete hollow- core slabs, in-situ concrete as well as wood and wood-concrete composite slabs. This construction method opens up new architectural possibilities of aesthetics, functionality and durability, creates more usable space, reduces emissions and improves the quality of life.

With a proportion of more than 90% recycled steel, Deltabeam Green considerably minimizes use of materials, compared to conventional steel structures. Deltabeam beams are usually cast in-situ with concrete to minimize CO₂ emissions caused by additional transport. Screw connections, for example, can be used for demountable connections (Fig. 1).

This combination of materials and type of construction allows implementation of even the most complex construction projects.