en.Wedoany.com Reported - Shimizu Corporation has recycled approximately 25,000 tons of construction demolition waste into steel bars at a construction site in Tokyo, reusing them in the new building on the same site, achieving a closed-loop recycling of construction waste.
Shimizu Corporation presented this project at the fourth seminar of the Advanced Scrap Recycling Research Group, led by the University of Tokyo. The company has established a dedicated recycling channel covering demolition contractors, scrap processors, traders, and electric arc furnace steel mills, ensuring traceability in the resource circulation process. This recycling project aims to promote the utilization of scrap steel, aligning with carbon neutrality and circular economy development goals.
Honda R&D Research Institute introduced at the seminar a plan to increase the use of recycled steel in automobile production through technological improvements. The company has developed a chemical treatment method that maintains paint adhesion standards even when the copper content in steel sheets exceeds 0.2%. High copper content is a key challenge in recycled steel. Honda stated that improving the purity of end-of-life vehicle scrap is essential for achieving large-scale "vehicle-to-vehicle" recycling, and reducing residual copper and other impurity elements is critical for the automotive industry to expand the use of high-quality recycled steel.
The research group, led by the University of Tokyo, brings together 29 organizations, including steel mills, scrap recyclers, traders, automakers, construction companies, and government agencies. Market participants noted that as Japan advances its decarbonization goals, enhanced cooperation across the steel industry chain will help achieve higher-quality scrap utilization and improve long-term recycling efficiency.
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