Copper tailings replace sand in autoclaved aerated concrete production When using this life cycle inventory (LCI) data, it is critical to only include it for AAC production where copper tailings are substituted for sand and a portion of cement. The appropriate calcium-silicate ratio (w(Ca)/w(Si)) of 0.56 should be maintained. Note that the system boundary excludes the transportation of other raw materials outside the factory and does not account for the potential environmental impacts after the production of the copper tailings AAC product. Actual production data and on-site research from companies in Jiangxi Province in 2019 should be referenced for accurate assessments.