Effects of Nano-Silica on Mechanical and Physico-Chemical Characteristics of High-Performance Concrete (HPC)

The numerous ordinarily practiced artificial material used for civil infrastructure development on the globe is cement concrete. This is an essential building substance applied broadly in framed structures, roads, dams, and bridges. The amount and property of cement reveal the overall performance of dry and green concrete. As the amount of cement increases, it makes an addition in carbon dioxide discharges which leads to a negative environmental impact. However, the properties of cement are enhanced by nano-silica (nSiO2) as a composite choice to reduce the quantity of cement in concrete. Recently, researchers are highlighting primary investigation during the microscopic or nano-levels of the cement concrete composition. The investigations extend to improve the performance and durability of cement concrete to get a high-performance concrete for the new era. This research article sums up the influence of nano-silica on the physiological and mechanical qualities of cement concrete. This article further describes the shortcomings and limitations of adopting nano-silica to advance high-performance concrete (HPC). The use of SiO2 nanoparticles demonstrated to improve considerably the mechanical characteristics and sustainability of HPC; although by utilizing CNS, the flowability of new concrete is reduced.