In a groundbreaking advancement for the construction industry, researchers at Delft University of Technology have developed an innovative mobile sensor-based inspection system designed to enhance the efficiency and reliability of quality inspections for recycled coarse aggregates (RCA). This technology, spearheaded by Cheng Chang and his team at the Resource & Recycling department, addresses a significant challenge in the recycling of End-of-Life (EoL) concrete, where inconsistent quality often hampers the use of recycled materials.
The new system boasts the capability to process over 100 tons of RCA per hour, making it a game-changer in the industry. Utilizing advanced 3D scanning and laser-induced breakdown spectroscopy (LIBS), the system provides real-time analysis of particle size distribution with an impressive Root Mean Square Error of less than 5.5%. Additionally, its contaminant detection accuracy stands at 94%. “This technology not only streamlines the inspection process but also ensures that the materials meet stringent quality standards, which is crucial for their acceptance in construction projects,” Chang stated.
One of the standout features of this innovative system is its use of incremental learning techniques. As new spectral data is collected, the system updates its chi-square distribution parameters dynamically, allowing for continuous refinement of its models without the need for complete retraining. This adaptability not only maintains high classification performance but also significantly reduces downtime and operational costs associated with traditional methods.
Moreover, the integration of radio frequency identification (RFID) tags for monitoring data enhances traceability throughout the recycling process. This level of transparency is increasingly important as the construction sector moves toward more sustainable practices. By bolstering the reliability of recycled materials, this technology supports the circular economy, reducing reliance on natural aggregates and promoting environmentally friendly infrastructure development.
The implications of this research extend beyond construction. The mobile sensor-based system can be applied in various fields, including mining, waste management, and resource recovery, thereby broadening its impact on sustainability efforts across industries. Chang emphasized, “Our goal is not only to improve the quality of recycled materials but also to pave the way for a more sustainable future across multiple sectors.”
The development of this innovative technology signals a pivotal shift in how the construction industry approaches material quality and sustainability. As the demand for eco-friendly practices continues to grow, this system may very well become a standard in quality inspections, reshaping the landscape of concrete recycling and paving the way for more resilient and sustainable infrastructure.
This significant research was published in ‘Developments in the Built Environment,’ a journal dedicated to advancing knowledge in the field of construction and civil engineering. For more information, visit lead_author_affiliation.
