Replacement of Cement by using Nano Titanium Dioxide in Concrete

Nanomaterials are very small sized materials with particle size in nanometers. These materials are very effective in changing the properties of concrete at the ultrafine level by the virtue of their very small size. Only a small percentage of cement proportions can be replaced to achieve the desired results. These nanomaterials improve the strength and permeability of concrete by filling up the minute voids and pores in the microstructure. The use of nano Titanium Dioxide (TiO2) in this study gives favourable results by increasing both compressive strength and tensile strength of concrete. In this study, we use nano Titanium Dioxide (anatase based TiO2) of size 15 nanometer (nm) to improve the compressive strength and tensile strength of concrete. An experimental study has been carried out by replacing the cement with nano titanium dioxide in the proportions of 0.5%, 1%, 1.5% and 2% (by weight of cement). The mix design used in this study was M25 and the mix proportion of M25 concrete was arrived by using IS 10262:2009 and IS 456:2000. The specimens (cubes and cylinders) were casted, cured and tested after 28 days to find out the compressive strength and split tensile strength of cubes and cylinders specimens. The maximum compressive strength is attained for 1.5% of Titanium Dioxide (TiO2) with replacement of cement (by weight of cement). Similarly, the maximum tensile strength is attained for 1.5% of Titanium Dioxide (TiO2) with replacement of cement (by weight of cement).