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Nanotechnology in construction sector is gaining widespread attentionas it provides a suitable alternative to fulfil the present need of sustainable construction without compromising the strength and cost of the concrete. Applications of silica nanoparticles (SNPs) in cementitious system results in three major advantages i.e. (1) Higher early stage strength, yielding to speedy construction; (2) Improvement in microstructure leading to higher performance against environmental constituents and (3) Modification in C-S-H structure, thereby exhibiting to enhanced durability.