Published Paper Details:

This project investigates the mechanical performance and sustainability potential of geopolymer concrete (GPC) produced using industrial by-products--fly ash and Ground Granulated Blast Furnace Slag (GGBS)--as an alternative to conventional Ordinary Portland Cement (OPC). In light of the urgent need to reduce carbon emissions from the construction industry, the study explores geopolymer technology as a viable pathway to green construction. The research involved preparing five different mix proportions of fly ash and GGBS (100:0, 75:25, 50:50, 25:75, and 0:100), activated using sodium silicate solution alone, under ambient curing conditions. Compressive strength of the mixes was tested at 3, 7, and 28 days. Results revealed that mixes with higher GGBS content significantly improved early-age strength due to its calcium-rich composition, while fly ash contributed to strength at later stages. The findings underscore the importance of optimizing binder combinations for specific performance goals. The geopolymer mixes showed promising strength development without the need for thermal curing, making them suitable for practical construction scenarios, especially in warm climates. This work directly contributes to several United Nations Sustainable Development Goals (SDGs): SDG 9 (Industry, Innovation and Infrastructure) through development of innovative materials; SDG 11 (Sustainable Cities and Communities) by promoting eco- friendly construction solutions; SDG 12 (Responsible Consumption and Production) by utilizing industrial waste; and SDG 13 (Climate Action) through the reduction of CO? emissions associated with cement production. The study confirms that geopolymer concrete, based solely on sodium silicate-activated fly ash and GGBS, presents a practical and sustainable alternative to OPC. Future work may focus on exploring durability aspects and extending the use of other local industrial wastes, further reinforcing its role in a circular economy framework.