Main Article Content
Concrete is a commonly used building substance. Mostly the cement quantity and quality reflects on the overall concrete production. The use of high cement causes a rise in carbon dioxide emissions, and nano-silica (nSiO2) as a composite alternative has been used to decrease the cements level in composite blends. Currently, the emphasis will be on fundamental research throughout the atomic or nano-levels of the concrete contents. In fact, the experiments continue to enhance the quality and longevity of mortar and have functional features and substantial increases in concrete. It sums up the impact of nano-silica on both the physiological and mechanical characteristics of the concrete. This article also explains the drawbacks and disadvantages of using nano-silica to boost the high-performance concrete (HPC). The use of SiO2 nanoparticles as demonstrated to improve considerably the mechanical characteristics and sustainability of HPC, although by utilizing CNS the flowability of new concrete is reduced.