Masterthesis SS25: Jiaxian Peng

This project proposes a closed‐loop system that integrates mushroom farming with temporary mycelium-based architecture. Wood-decay fungi such as oyster (Pleurotus ostreatus) and lingzhi/reishi (Ganoderma spp.) serve dual roles: their fruiting bodies are harvested for food or medicine, while the residual mycelium is grown within reusable 3D-printed or modular formwork to create construction blocks. After mushroom harvest, these mycelium blocks are dried and repurposed as structural elements—arches, columns, walls—enabled by a novel topologically interlocking geometry. The module design relies on a series of rotations and mirrorings that yield symmetric shapes with only two unique surface types, allowing six interlocking mold pieces to be fabricated. Two assembly strategies enhance structural performance: a post-tensioned system that uses elastic cords to compress blocks—and thus boost friction without damaging the material—and a bamboo-reinforced approach that exploits bamboo’s rapid renewability and mycelium’s geometric malleability to compensate for its tensile and shear weaknesses. Looking forward, automation could manage suspended cultivation units, continuously producing mushrooms and mycelium bricks. Community kits and shared pavilions would enable household-level growing and temporary construction, while open-source molds allow global DIY participation. A signature “Mushroom Pavilion” illustrates the concept: a solar-powered, rainwater-harvesting community hub whose facade comprises biodegradable mycelium bricks within a bamboo frame. As exterior blocks biodegrade, they can be replaced seamlessly, embodying a regenerative agricultural-architectural ecosystem that educates and empowers users while minimizing waste.

Masterthesis SS25: Stefanie Appelgrün

The free DDU Master’s thesis “Silent Silhouettes” by Stefanie Appelgrün investigates the potential of additively manufacturing acoustic absorbers from clay. The goal is to develop a mono-material, sustainable, and acoustically effective structure that does not require additional carrier materials or composites. As part of an extensive initial research, the current state of research on additively manufactured clay structures, the acoustic behavior of porous materials, and the influence of internal geometry on sound absorption was analyzed. Building on this, the first part of the project identified geometric parameters that enhance the acoustic performance of clay structures — among them a wave-shaped outer contour, a microstructured surface with openings, and an internal, highly porous geometry based on a growth-based algorithm. Differential growth generates channel-like geometries that, through specific overlaps, form complex three-dimensional pore spaces. The developed geometry is based on alternating concave and convex base curves that create a pocket-like structure arranged bead-like along a higher-order curve. This results in a silhouette with narrow vertical openings that enables targeted reflection and attenuation of sound down to the energetic minimum. At defined points, the sound is absorbed by the porous growth pattern developed here. Computer-based simulations, impedance tube measurements, and reverberation chamber tests confirm the increased acoustic performance. This demonstrates the potential of additively manufactured clay structures as a sustainable alternative to conventional acoustic solutions.

DDU featured in Bauwelt 18.2025

In the recent Bauwelt 18.2025, we discuss how AI is changing design processes, planning workflows, and the role of architects. Within our ZIM innovation network “AI in Building Design”, we put these ideas into practice and develop AI-driven tools for real projects.

The Digital Design Unit (DDU) is now publishing a comprehensive curriculum PDF outlining its full range of courses. The document provides a clear overview of all Bachelor’s and Master’s level offerings – including seminars, design studios, research modules, and thesis formats. It is especially valuable for prospective students and applicants considering a transition into the Master’s program, offering structured guidance and insight into the DDU's focus areas, specialization opportunities, and academic profile within the department of architecture.

Lecture, May, 27, 5pm, DDU

Due to the renovation of the architecture building, DDU also had to relocate within the building. You will therefore now find us on the first floor, in the former white computer pool. Further information can be found here