Mechanical Properties of High Performance Concrete Containing Nano Silica and Silica Fume

The construction industry is a major consumer of material and energy sources in the world. Among all the materials used in construction, concrete is the most widely used which have a significant impact. Meanwhile, nanotechnology is one of the most influential technologies in this century and it has significantly impacted the construction sector. The main objective of this study is to investigate the effect of nano silica and silica fume on the mechanical properties of High performance concrete. In this study, Mechanical properties like compressive strength, split tensile, flexural strength of high performance concrete containing nano silica and silica fume have been investigated. For this purpose, different trail mixtures were designed with different amounts of silica fume and nano silica admixtures. Portland cement was partially replaced by 1%, 1.5%, 2%, 3% of nano silica and silica fume were replaced by 5%, 7.5%, and 10%. The results confirmed that both nano silica and silica fume performs better than the conventional concrete in mechanical properties. Owing to the size of nano silica, it shows better results than the silica fume.