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By: Rajendra Ganapati Hegde and K G Gupta.
This research examines the combined influence of epoxy resin and Alccofine when used as partial substitutes for cement in producing sustainable, high-performance concrete. The study aims to improve both strength and durability properties while simultaneously reducing cement usage and its environmental impact. Concrete mixes were prepared with epoxy resin contents of 0%, 5%, and 10% by weight of cement, along with Alccofine replacement levels of 5%, 10%, and 15%. The experimental program involved assessing compressive strength, split tensile strength, and flexural strength at curing periods of 7, 28, and 56 days. Additionally, durability performance was evaluated through tests on water absorption, resistance to acidic environments, and rapid chloride permeability to understand long-term behavior under aggressive exposure conditions.The results indicated that the mix containing 5% epoxy resin and 10% Alccofine exhibited the most balanced performance across both strength and durability parameters. This optimum combination resulted in an increase of approximately 24% in compressive strength and 18% in flexural strength compared to the control mix, along with a significant reduction in water absorption, indicating improved matrix densification and reduced porosity. Microstructural analysis using Scanning Electron Microscopy (SEM) confirmed the formation of a denser and more homogeneous internal structure. This improvement is attributed to the combined effect of Alccofine-induced pozzolanic reactions, which contribute additional calcium silicate hydrate (C–S–H) formation, and the polymeric film-forming characteristics of epoxy resin, which enhance particle bonding and reduce micro crack propagation. Overall, the study shows that the combined use of epoxy resin and Alccofine can significantly improve the mechanical performance and durability of concrete. The findings highlight the potential of such hybrid cementitious systems in developing sustainable construction materials with enhanced resistance to chemical attack and improved long-term structural performance, aligning with the objectives of eco-efficient and resource-optimized construction practices.
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