Influence of nano-silica on characteristics of cement mortar and concrete

Abstract

The use of nanotechnology is of prominent research interest in the construction industry. Introducing nanomaterials into cementitious systems enhances its characteristic material properties. Nano-silica is the most efficient nanomaterial in replacing cement without compromising its strength and durability. Nano-silica also enhances the properties of cement when in conjugation with other supplementary cementitious materials. Nano-silica offers high chemical reactivity and introduces filler effect in the cement matrix, thereby densifying the interfacial transition zone (ITZ) and improving the properties of cement-based materials. However, the addition of nano-silica more than the optimum dosage reduces the strength and durability. Apart from the dosage, many other parameters also influence the properties of nano-slica blended cement composites. This study deals with the changes in characteristic properties of cement and cement-based materials upon incorporation of nano-silica.