Hazardous Bauxite Red Mud As the Principal Component of Sustainable Concrete

Mymrin V, Monica AA, Cechin L, Abdalla-Filho J, Karina QC, Fernando HP, Haminiuk CWI and Rodrigo EC

Published on: 2023-12-26


This article discusses the possibilty to use three types of industrial waste – hazardous highly alkaline bauxite red mud converter slag and lime production waste to produce sustainavle cementless concrete The axial compression strength values of the developed three-composite materials reached 4.3, 7.0, 11.8, and 14.9 MPa after 3, 28, 365, and 730 hydration days, respectively; the water absorption coefficient values on the 28th and 90th hydration days varied from 10.54 to 11.20%, and those of linear expansion coefficient were between 0.23 and 2.76%. The materials’ structure formation processes were studied by the XRD, SEM, EDS, AAS, and LAMMA methods. The solubility and leaching of metals, investigated by the AAS method, showed the compliance of the new compositions with Russian sanitary standards.