Preparation and property of unfired brick using electrolytic manganese residue

Abstract

Abstract The feasibility of making unfired brick from the EMR with some additives in laboratory experiments was investigated in this paper. The results show that the EMR can be used to produce unfired bricks meeting JC/T 422-2007 for Mu 25 non-fired rubbish gangue brick. XRD and SEM analyses indicated that C-S-H, calcite, gypsum were newly generated phases in the unfired brick and there are almost no large capillary holes in the unfired brick, which can increase the compressive strength of the brick. The leaching toxicity test demonstrated that the unfired EMR bricks samples showed significant reduction in leach ability of heavy metals compared to raw EMR.