Chile approves use of copper slag as artificial aggregate

Published: Feb 28, 2026 09:06

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Chile's Ministry of Health has officially authorized the use of copper slag as artificial aggregate in construction, such as for road surfaces. Published into law on February 12, 2026, Supreme Decree 46 aims to transform a significant mining waste product into a valuable resource.

Industry group Consejo Minero stated the regulation promotes the circular economy by turning a historical liability into an input for infrastructure. Mining companies Anglo American and Codelco supported the effort through pilot projects demonstrating the material's safe application in paving and public spaces.

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