In the pursuit of sustainable design, architects and material innovators are increasingly revisiting traditional materials such as timber and clay. These biobased resources, when paired with modern technologies, offer eco-friendly alternatives to conventional construction methods and pave the way for circular and regenerative practices. Two pioneering projects, Think Earth – Regenerative Building and Swircular, led by ETH Zurich and Empa, illustrate how material innovation and digital ecosystems can transform the built environment.

Think Earth: Reimagining Materials for Circular Construction
Timber and earth are highly sustainable materials, valued for their abundance, recyclability, and ability to sequester carbon. The Think Earth project harnesses these materials to develop modular building systems that are not only climate-friendly but also regenerative and reusable. Prefabricated clay blocks, designed to be dry-stacked without adhesives, allow for straightforward disassembly and reuse. These blocks, combined with timber elements, form flexible structures that can be reconfigured or dismantled for alternative uses.

A key focus of the project is on improving timber connections, enabling wooden components to be reused in up to 90% of cases. By refining joint systems, researchers ensure that the structural properties of timber are preserved, extending its lifecycle and minimising waste. Additionally, Think Earth is advancing clay-based materials with enhanced water resistance and load-bearing capabilities, meeting modern construction standards while maintaining their eco-friendly credentials.

Swircular: A Digital Ecosystem for Circularity
Complementing Think Earth, the Swircular project introduces a cutting-edge digital system to support circular construction. Swircular assigns QR codes to timber and other building components, linking them to a comprehensive database that tracks material properties, usage history, and potential for reuse. This digital ecosystem enables greater transparency and simplifies the reuse and recycling of materials, ensuring a seamless transition to circular design principles.

For architects, interior designers, and other creative professionals, Swircular offers practical tools to align their projects with sustainability goals. By connecting physical materials to their digital records, the system facilitates more efficient planning, reduces waste, and ensures that materials can be reclaimed and reused in future projects. This digital-first approach bridges the gap between innovative material use and practical application in the construction industry.

Driving Innovation for a Sustainable Future
Both Think Earth and Swircular are part of Innosuisse’s flagship programme, which promotes interdisciplinary collaboration to address pressing societal and environmental challenges. Supported by Swiss universities, industrial partners, and research institutions, these projects demonstrate the power of partnership in driving sustainable innovation.

Beyond construction, the potential applications of these developments extend to other design disciplines. Swircular’s digital tracking system, for instance, could be adapted to monitor materials used in product design, packaging, or furniture production, broadening its impact across industries.

A Blueprint for Regenerative Design
The synergy between Think Earth and Swircular offers a compelling vision for the future of sustainable design. By combining traditional biobased materials like timber and clay with advanced digital technologies, these projects exemplify how the construction industry can transition to circular and regenerative practices. For architects, designers, and material specialists, they underscore the immense potential of rethinking materials and integrating technology to meet the challenges of climate change and resource scarcity.

As demand grows for sustainable and circular solutions in design, Think Earth and Swircular serve as inspiring examples, paving the way for a more adaptable, eco-conscious, and resource-efficient built environment.

Source: ETH Zurich, Empa News
Photos: Pallavi Keshri and Linus Schmitz / ETH Zurich, Oxara, Daniel Winkler Fotografie