This study investigates the performance and decarburization potential of ultrafine binder-based geopolymer concrete (UFB-GPC) developed using ultrafine fly ash (UFFA) and ultrafine ground granulated blast furnace slag (UFGGBS) as sustainable alternatives to conventional Ordinary Portland Cement (OPC). The research focuses on evaluating the influence of varying percentages of UFGGBS replacement on workability, mechanical properties, durability, and microstructural behavior. Experimental results indicate a significant improvement in workability with increasing replacement levels, attributed to the ultrafine particle size and enhanced packing density of the binder system. Strength development and durability performance are found to be closely linked with the degree of geopolymerization and matrix densification. Comparative analysis with OPC-based concrete demonstrates superior performance and reduced environmental impact of UFBGPC. Furthermore, life cycle assessment (LCA) results confirm a substantial reduction in CO₂ emissions due to the utilization of industrial by-products, highlighting the strong decarburization potential of the developed material. The study identifies optimal mix proportions that balance performance and sustainability, making UFB-GPC a promising solution for eco-friendly construction.

Manjeet Kumar, Dr. Maroof Khan, "Decarbonization Potential of Ultrafine Binder-Based Geopolymer Concrete in Sustainable Construction" International Journal of Advanced Multidisciplinary Research and Educational Development, V2(4): Page(237-241) July - August 2026. ISSN: 3107-6513. www.ijamred.com. Published by Scientific and Academic Research Publishing.