Electrolytic manganese residue based autoclaved bricks with Ca(OH)2 and thermal-mechanical activated K-feldspar additions

Abstract Electrolytic manganese residue (EMR) is a type of solid wastes generated along with the production of electrolytic manganese. Currently, treatment and utilization of the EMRs are essentially insufficient, leading to lots of cultivated land being occupied, together with serious environmental pollution. In this study, we prepared EMR based autoclaved bricks (EMR-ABs) with the addition of Ca(OH)2 and thermal-mechanical activated K-feldspar. The orthogonal and single factor tests were performed to determine the influences of preparation conditions and associated mechanism. Results indicate that EMR-ABs could be obtained with 1-day compressive strength of 23.5 MPa and the Mn leaching concentration of