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CTU΄s study at the “V. International Conference Progress of Recycling in the Built Environment"


Václav Nežerka from the Czech Technical University in Prague had the opportunity to attend the "V. International Conference Progress of Recycling in the Built Environment" this October 2023 in Weimar, Germany. It was a gathering that stands at the forefront of sustainable construction practices. Amidst the historical backdrop of Weimar, renowned for its cultural heritage, this event carved out new pathways for the construction sector's future, highlighting the urgent need for innovative recycling techniques in the built environment.


Václav Nežerka presented a breakthrough study on enhancing the classification of construction and demolition waste (CDW) using advanced machine learning techniques. The research, which builds on a foundation of achieving up to a 92.3% accuracy rate in sorting CDW through RGB camera data, introduced a novel dataset acquisition method that promises to revolutionise this process further. By integrating industrial RGB cameras with force and acoustic transducers, the team showcased how to enrich machine learning algorithms with more precise data, potentially boosting classification accuracy beyond previous benchmarks.


The audience, a blend of international experts and practitioners, was particularly intrigued by the application of ultrasonic sensors in distinguishing between different types of waste materials. The team's methodology, which includes innovative feature extraction techniques such as shape indices, texture entropy, and mean intensity gradients, was met with curious inquiries, sparking fruitful conversations.


This year's conference, organised by the Weimar Institute of Applied Construction Research, took a deep dive into the latest developments in CDW recycling. With a legacy spanning over three decades, the institute's commitment to fostering sustainable practices shone through the comprehensive agenda. From exploring new processing techniques to examining the life cycle costs of recycled materials, the event was a confluence of ideas aimed at strengthening the production and use of recycled materials.


An exciting part of the event was the planned excursion to a state-of-the-art stationary recycling plant, providing a hands-on experience of the latest technologies in action. This real-world connection between theory and practice embodied the spirit of the conference, emphasising the real impact of academic research on industry practices.


The presentations and debates underscored the critical role of CDW recycling in not just preserving natural resources but also in paving the way for a more resilient and sustainable construction industry. In a world where the demand for raw materials is ever-increasing, and the need for sustainable solutions is paramount, the conference was a beacon of progress. It highlighted the collaborative efforts required to turn the tide toward more environmentally friendly practices. As Václav and his colleagues concluded their presentation, the impression left was clear: the path towards sustainable development in the built environment is being forged by such innovative research and shared expertise.

For those interested in delving deeper into the topics discussed at the conference, further information can be found at the event's web page:


Α record for the CTU contribution according to the published conference proceedings is available here: https://zenodo.org/records/10252435


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