Influence of Nano-Carbon Additives on the Mechanical Properties of Cementitious Composites: A Study on Static and Dynamic Modulus Variations

This Effect of Nano-carbon additives on mechanical performance and durability of cementitious composites in oi terms of static and dynamic modulus is studied. A Nano carbon powder was admixed in 5%, 10% and 15 % levels as a cement replacement in M20, M25 and M30 concrete grades and the mechanical properties were for curing ages of 14, 28 and 84 days. These results show that 5% Nano-carbon addition has improved static and dynamic modulus by increasing stiffness, fatigue resistance and load bearing capability. However, modulus values decreased above 10 % and 15 % replacement levels (due to agglomeration effects and non-uniform dispersion of carbon particles to matrices). A statistical analysis of modulus variations revealed lower variability at 5 % replacement, indicating good performance. Those findings confirm that at controlled dosages, Nano carbon additives improve mechanical properties and are suitable for high-performance concrete (and) bridges, pavements, and smart infrastructure. This study highlights the feasibility of using nano carbon additives to reach the performance targets in high performance concrete applications such as bridges, pavements and smart infrastructure. This research encourages sustainability through the reduced use of cement and reduction of industrial waste by using waste derived carbon materials.