TY - JOUR AU - Gonzalez-Triviño, I. AU - Pascual-Cosp, J. AU - Moreno, B. AU - Benítez-Guerrero, M. PY - 2019/03/30 Y2 - 2024/03/28 TI - Manufacture of ceramics with high mechanical properties from red mud and granite waste JF - Materiales de Construcción JA - Mater. constr. VL - 69 IS - 333 SE - Research Articles DO - 10.3989/mc.2019.03818 UR - https://materconstrucc.revistas.csic.es/index.php/materconstrucc/article/view/2240 SP - e180 AB - Red mud (bauxite residue) is an alkaline suspension that is the by-product of alumina production via the Bayer process. Its elevated annual production and the global inventory of red mud determine its valorisation. Granite can be used as a source of fluxing oxides for the ceramic industry, as can the flake-shaped waste generated during the flaming of granite. In this work, a set of ceramic pieces made of red mud and granite waste are prepared and characterised via X-ray diffraction, a hardness test, electron scanning microscopy, a leaching test, and determining open porosity, water absorption, bulk density and flexural strength of the samples. The main crystalline phases in the high-temperature fired products are hematite, pseudobrookite and anorthite; the presence of magnetite reveals their ferrimagnetic character. All samples present high mechanical properties. Leaching results are below critical levels established by regulations. ER -