Circular Economy in Construction

The construction industry is undergoing a significant transformation towards sustainability, driven by innovative projects like the Circular B-I/O initiative. Funded by the Volkswagen Foundation, this project brings together key stakeholders including Meru University of Science & Technology (MUST), The Federal Institute for Materials Research and Testing (BAM), and SRH Berlin University of Applied Sciences. The primary goal is to develop circular economy-based concrete solutions using agricultural waste, invasive species, and industrial waste, thereby promoting sustainable construction and local supply chains.

At the forefront of the Circular B-I/O project are sustainable materials. The initiative focuses on utilizing bio-based materials such as agricultural waste and invasive species like water hyacinth. These materials are converted into environmentally friendly alternatives to traditional cement, significantly reducing carbon emissions through the production of biochar and ashes. This approach not only contributes to a more sustainable construction sector but also offers potential economic benefits for smallholder farmers by providing them with new revenue streams.

A crucial aspect of the project is the feasibility assessment conducted to evaluate the practicality of incorporating these ashes into concrete and cement production. This assessment is vital for understanding how these sustainable materials can be integrated into existing construction practices, ensuring both environmental sustainability and economic viability. By exploring these alternatives, the project aims to enhance the sustainability of Kenya’s construction sector while supporting local communities.

The Circular B-I/O project also emphasizes collaboration and research, fostering partnerships between institutions to ensure sustainable practices and stakeholder engagement. This collaborative approach is designed to create lasting impacts on the construction industry.

Recent developments include a visit by Eng. Thomas Pfeiffer and Paul Scholz from SRH Berlin University of Applied Sciences to the Institute of Cement and Concrete (ICC) at MUST on February 26, 2025. During this visit, the Vice Chancellor of Meru University of Science and Technology, Prof. Romanus Odhiambo, signed a memorandum of understanding with SRH University to enhance research and collaboration efforts.

The Circular B-I/O project aligns with broader efforts in the construction sector to adopt circular economy principles. This initiative highlights the industry’s commitment to sustainability and its potential contribution to reducing environmental impacts while promoting economic growth. By leveraging bio-based materials and fostering local supply chains, the project sets a precedent for sustainable construction practices that can be replicated globally. As the construction industry continues to evolve, projects like Circular B-I/O will play a pivotal role in shaping a more sustainable future.