••• 9 ••• Innovationen Bonding technology Building with wood and concrete Building with wood provides an important contribution towards climate protection. By combining wood and concrete, the Fraunhofer WKI is significantly expanding the range of applications for timber constructions. By means of a novel bonding technology, an accelerated production of woodconcrete composite elements (WCC elements) has been made possible. The aim is to establish construction with WCC elements in multi-story buildings as a competitive alternative to pure precast reinforced concrete components. Wood-concrete hybrid components optimally combine the specific material properties of wood and concrete. With its low weight and high tensile strength, wood is perfectly suited for lightweight construction. The combination with concrete improves the load-bearing capacity, fire resistance and sound insulation, whilst simultaneously enabling a slender component design. In the current “SafeTeCC” research project, researchers at the Fraunhofer WKI are, in collaboration with two research partners and great support from the industry, developing processes and technologies for the rapid and simple production of high-quality wood-concrete composite elements using an innovative rapid-bonding technique. The novel joining technique is intended to improve the structural properties, cost-effectiveness and recyclability of wood-concrete composite elements and, as a result, to contribute towards an increased application of renewable raw materials in solid construction. The researchers are thereby also taking into account the utilization of hardwood as a regionally available raw-material source. “We are developing a standardized procedure for the production of long-term resistant WCC components under practical conditions. In addition to the hotbonding technique, we are testing and analyzing alternative bonding technologies for the joining of wood and smooth-surfaced precast concrete components. This is being conducted in collaboration with our project partners from the Technische Universität Braunschweig and the University of Kassel. During the research work, a practical application for factory and constructionsite production of the components is also being taken into account,” reported Malte Mérono, Project Manager at the Fraunhofer WKI. The research results will be summarized in a practical guide that presents the specific implementation steps and relevant criteria in a user-friendly format. This guide is intended to serve as a planning basis and to facilitate the efficient production of WCC elements by, in particular, small and medium-sized enterprises (SMEs). The development devised by Malte Mérono and his partners has already passed the practical test. In collaboration with fischerwerke GmbH & Co. KG, a bonded WCC element has been successfully installed as a suspended ceiling in a multi-story construction project. The company is now seeking building-authority approval for the suspended ceiling. “With the approval of the bonded suspended ceiling, we will take a big step forward towards our goal of being able to utilize wood in multi-story building construction. This is an important contribution towards an ecological revolution in the construction industry, which is dominated by reinforced concrete,” said Malte Mérono. Block shear tests based on DIN EN 14080 are conducted at the Fraunhofer WKI in order to determine which adhesive is best suited for the hot bonding of WCC components (here: test specimen with 2C epoxy-resin adhesive) Foto: Fraunhofer WKI | Anna Lissel Push limits. Smash barriers. Break boundaries. And when you’ve conquered all those obstacles? You discover your full capacity for greatness. World of Concrete delivers all the real-world solutions that will crush your challenges and take your expertise to new heights. Growth opportunities are everywhere, whether you’re getting hands-on with game-changing tools and tech or shaking hands with your future partners. Ready for maximum success? Nothing’s standing in your way. ACHIEVE PEAK PERFORMANCE VIEW GLOBAL EVENTS LAS VEGAS CONVENTION CENTER EDUCATION: JANUARY 19-22, 2026 EXHIBITS: JANUARY 20-22, 2026
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