A Review Study on Compressive Strength of Nanoparticle (Silica) Modified Concrete

In the modern era, concrete is the most common and usable material available on earth which construct a large number of civil infrastructure due to its low cost, fir resistant and able to cast in any desired form. Construction industry is used portland cement as primary binding material. The main environmental issue connected with the production of ordinary portland cement is the emissions of carbon dioxide which is due to the combustion of fossil fuels and calcinations of lime stones. Reduction in the usage of portland cement will reduced the demand of portland cement hence reduction in the emissions of carbon dioxide will occur. Now in present scenario, many researchers try to modify the concrete using subsidiary cementeous materials, out of which silica nanoparticles is used to reduce the utilities of cement, which will be helpful for both environment and enhancing the strengthening properties of concrete. The continuous development of nano material science in concrete has added a new part to the efforts to improve its properties. Nano particle, due to its nano particle size can modify the mechanical behavior of concrete by changing the microstructure. The present investigation focuses towards the compressive strength of silica nanoparticle modified concrete of M25 grade mix. Four batches were prepared to show the effect of addition of silica nanoparticle on the mechanical behaviour of concrete, through replacing silica nanoparticle by 0.40%, 0.80%, and 1.20% of the weight of cement to compare with the conventional concrete by keeping the water to cement ratio 0.45. The specimens were tested for UPV and compressive strength at ages of 7, 14 & 28 days respectively. On the basis of the experiment results, it was concluded that there is a substantial increase in the early age and small increase in the overall strength of the concrete by increasing the silica nanoparticle content in the concrete mix, when the cement is partially substitute with silica nanoparticle for 7, 14 & 28 days respectively.