Assessment of the effects of the cement paste compo site in presence TiO 2 nanoparticles

Abstract

The purpose of this study is to investigate the com pressive strength and workability of concrete by pa rtial replacement of cement with nano-phase TiO 2 particles. TiO 2 nanoparticles with the average diameter of 15 nm were used with four different contents of 0.5%, 0.1%, 1.5% an d 2.0% by weight. The results showed that the use o f nano- TiO 2 particles up to maximum replacement level of 2.0% produces concrete with improved strength. However, the ultimat e strength of concrete was gained at 1.0% of cement replacement. The workability of fresh concrete was decreased by increasing the content of TiO 2 nanoparticles. It is concluded that partial replac ement of cement with nanophase TiO 2 particles improves the compressive strength of concrete but decreases its workability. (Journal of American Science 2010;6(4) :43-46). (ISSN: 1545- 1003).