Summary of the technology
The cement industry accounts for 6% of the EU’s CO2 emission. In a typical reinforced concrete building, floors account for approximately half of the amount of concrete. The necessity for concrete in flooring systems can be significantly reduced by using different materials. The combination of timber and concrete has become especially interesting in the last decades.
The research is focused on timber-concrete composite (TCC) structural floors. Usually, TCC floors are made of timber beams or a deck connected to an upper concrete layer.
Nevertheless, there are many ways to combine and connect timber and concrete into one hybrid floor component. Engineering conceptions are conditioned by varying functional requirements.
Description of the technology
In Luxembourg, there is a growing need for modular, reusable, resource efficient components in the construction industry, to serve some of the country’s strategic goals.
The research is done on a connection technology that allows destruction-free assembly and reassembly of a TCC floor and its main constituents. It does not require the use of steel shear connectors. It is composed of a specific notch embedding a concrete compression link that can be processed separately from the rest of the upper concrete layer. The connection technology relies on mechanical interlocking.
- This technology allows destruction-free assembly and re-assembly.
- Manufacturing and assembly of many steel shear connectors is not necessary.
- The notch is relatively easy to realise. It can be automated as well as performed by a craftsman with conventional tools.
- Many different types of timber can be used, under the form of beams or decks.
- Once recycling becomes inevitable, the parsing of different materials is straightforward.
- The elements have been pretested with finite-element analysis.
- Laboratory tests are planned
University of Luxembourg
Research & Technology Organization