Application Of Carbon Nanotubes in Construction: A Review

Incorporating carbon nanotubes (CNTs) in the construction field offers significant potential, particularly for enhancing the mechanical properties of cement-based materials. When partially replacing cement, CNTs can significantly boost both compressive and flexural strengths, making them an effective additive for reinforcing structural elements. CNTs act as micro-reinforcements, effectively bridging cracks in the matrix and distributing the applied loads more evenly. Their inclusion at optimal levels—particularly between 0.15% and 0.25% by weight fraction—yields the most substantial strength improvements, enhancing flexural strength by up to 55% and compressive strength by up to 22%. Beyond 0.25%, however, dispersion issues and increased viscosity reduce the effectiveness of CNTs. This makes proper processing and careful proportioning essential for real-world applications in cement preparation, ensuring that CNTs are fully utilized for improved performance in construction materials.