Investigated in this experimental project is the possible main binder material in the manufacturing of geopolymer mortar: an industrial waste rich in silica, sugarcane bagasse ash (SBA). This initiative aims to reduce waste in the building industry by offering an environmentally suitable replacement for Portland cement, therefore lowering carbon emissions. Sodium silicate (Na2SiO3) and sodium hydroxide (NaOH) in an alkaline activator solution produced SBA's geopolymer mortar. By varying the molarity of the alkaline solution and mix ratios, one improved geopolymerization. Including tiny particles generated a suitable mortar mix adequate for both structural and non-structural applications. The purpose of the experiment was to use extensive characterisation under scanning electron microscopy (SEM) to assess SBA's microstructure and chemical content. Various geopolymer mortar mixes were prepared using combinations of FA, SBA, and Ground Granulated Blast Furnace Slag (GGBS), and tested for compressive strength at 7, 14, and 28 days. The results show that SBA significantly enhances the reactivity of the geopolymer system due to its high silica content. Among all tested mixes, the blend containing 70% FA, 20% SBA, and 10% GGBS exhibited the highest compressive strength at 28 days, outperforming both OPC and other geopolymer mixes. The findings confirm the potential of incorporating agricultural (SBA) and industrial (FA and GGBS) waste materials to produce high-performance, eco-friendly binders for sustainable construction applications.