Abstract

This paper details experimental investigations into how nano silica and nano alumina affect the mechanical properties of high-performance concrete. In order to reduce the amount of cement needed, mineral admixtures such as nano silica, nano alumina, and micro silica are used. High performance concrete’s compression strength, split tensile strength, and flexural strength have all been studied. Nano silica is added to concrete at a rate of 3% by weight of cement, nano alumina is set at 1% after trials, and micro silica is set at 10%. Mechanical properties were found to be significantly enhanced by the addition of both nano silica and nano alumina, as compared to the control mix. The addition of nanoparticles to concrete enhanced its mechanical properties by increasing its consistency and decreasing its porosity.

Key words: High performance concrete, Micro silica, Nano-Silica, Nano-Alumina, Nano-Iron oxide, Nano-titanium oxide, Nano carbon tubes