Application of Nano Silica in Cement-Based Materials - A Review

Nanotechnology aids a lot to bind materials in the construction industry. Nowadays due to the emergent uses of abundant nanoparticles in buildings, an enhanced understanding of nanotechnology in cement-based materials is needed to assess. Among them, nano silica shows a dynamic role in cement-based materials. The content of this paper summarized the evidence from past published research related to this study area. In this paper, we briefly introduce the impact of nano-silica on cement-based materials and the challenges related to it. Nano silica can act as both filler and pozzolanic material. It is reported that the addition of nano-silica leads to a reduction in setting time; this is due to the hydration reaction which is achieved through the high action of nano-silica. The size of nano silica is influenced by its specific surface area. Due to its tiny particle dimension, it has an excessive specific surface area. A denser microstructure of cement paste is observed by the addition of nano silica. This has an improved effect on the durability of concrete. In the case of the mechanical properties of concrete, it should be recognized that nanoSiO2 displays a restricted improvement