In the present era, concrete is mixed, transported, placed, compacted, and finished. In spite of all the activities done through checking with high standard quality with tight schedule of work, there occurs marginal errors, such as honey combing, voids in concrete, and could not achieve desired values. So the traditional concerte is replaced with the new technique called SCC, that is Self Compaction Concrete. The workability properties of SCC show significant increase in strength and workability properties. Self Compacting Concrete has segregation resistance evaluated using workability tests, such as slump flow, V funnel, and L-Box tests.

The present work deals with addition of nano-silica to concrete as partial replacement to cement in dosages of 1%, 1.5%, and 2% by weight of cement. Based on early research, M25 grade concrete has been chosen for this work. The mix design was prepared using IS: 10262-2009 guidelines for concrete mix design proportioning. In the present work, 24 numbers of cube moulds and 12 numbers of cylinder moulds were casted with addition of nano-silica with different proportions, which are tested for compressive strength and split tensile strength. Addition of nano-silica to normal cement concrete show increase in compressive strength and decrease in splitting tensile strength.

The compressive strength of cement concrete can be increased considerably by the addition of nano-silica. Based on the experimental results, use of nano-Silica as partial replacement of cement in small quantities is advantageous on the performance of concrete. Nano-Silica added in small quantities can improve the compressive strength.