Résumé

The most widely used construction material is reinforced concrete which is heavy, has rather high embedded carbon, strongly draws upon non-renewable resources, is challenging to re-use, and exhibits rather poor building-physical properties. A high potential for a more sustainable development of building construction is located in timber-based composite structures. These should be, however, not be produced with regular concrete, as this still introduces the mentioned disadvantages. Mixes of cement with wood components, so called wood-cement compounds (WCC), may be one of the answers for an even more sustainable evolution of timber-concrete composite construction. Some of the non-renewable parts (gravel, sand) of concrete are substituted with renewable ones in WCCs, with the objective to create a light-weight, pourable, selfcompacting, cheap, easily recyclable, and thus, “greener” cement-based construction material that has further benefits with regard to building-physical properties to be exploited in so-called hybrid structural elements. This paper reports on results of laboratory testing for determining short- and long-term mechanical properties of newly developed WCC recipes, i.e. density, elastic moduli, compressive and tensile strength, shrinkage, and creep properties. Furthermore, their economic feasibility is assessed as well and potential challenges in structural applications of WCCs are pointed out.

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