Unconfined Compressive Strength of Geopolymer Cement

Red mud is produced by the production of alumina and its disposal is now a global problem. Every year large amounts of red mud are released from the bauxite calcination method and its use has become an urgent problem. The initial study investigates the possible reuse of red mud through geopolymerization and itsreaction with other solid waste, such as fly ash. This document offers a concept that studies the geopolymerization of red mud, the main industrial leftover from the refining of alumina and fly ash, an industrial leftover from the burning of coal, consumingminimummaterials. Different synthesis factors (for example, the ratio of red mud / fly ash, sodium metasilicateNonahydrate solution in a solid mixture (ratio of red mud and fly ash), diverse concentrations of sodium metasilicateNonahydrate solution, etc.). They are altered to have an effect on the evaluation of mechanical properties of the final geopolymer product. In this study, the ratio of red mud to fly ashwas maintained at 50:50 as a constant ratio, the solution to the solid mixture as 1 and the change in concentration of the sodiummetasilicateNonahydrate solution (2M-6M). The outputs of the unconfined compression test display that these aspects have a substantialimpact on the mechanical characteristics of the synthesized geopolymer. Depending on the synthesis circumstances, the unconfirmed compressive strengths range from 2.391 kg / cm² to 10.963 kg / cm² and high values can be compared with some types of Portland cement. The results shows the two most important industrial leftovers, red mud and fly ash, can be reutilised to produce geopolymers that can substitute Portland cement and can further be used in the construction of civil infrastructure.