612 m² mesograded foundation slab cast in December 2025.
A milestone has been reached in the construction of the IntCDC Building. We are pleased to announce that the 612 m² foundation slab produced from Functionally Graded Concrete (FGC), which will support the office areas of the building, was successfully cast on December 11th. FGC was applied to a construction project for the first time on this scale within the frame of the IntCDC's RP1 and RP2 research projects and following several years of research carried at the ILEK with his partners. This not only marks a major milestone for the research on lightweight concrete structures, but also signals the start of the construction of IntCDC’s new home.
The foundation slab incorporates around 3,000 mineral hollow spheres with diameters of 20 and 30 cm. These spheres are deliberately placed within the slab in the areas with moderate to low stress to reduce concrete use. Considering structural and functional requirements, this approach enables a 30% reduction in weight, demonstrating the practical application of a material-efficient and environmentally sustainable design approach to future-proof concrete construction.
The next milestone will be reached in spring 2026, when the first-floor slab will be cast incorporating another 16,000 mineral hollow spheres. Stay tuned!
