Strength properties of pavement concrete containing nano-particles

Strength properties (including flexural, compressive and splitting tensile strengths) of pavement concrete containing nano-particles are experimentally studied and compared with that of plain pavement concrete. Both nano-SiO₂ and nano-TiO₂ are respectively used to be as the additives. The test results show that the flexural, compressive and splitting tensile strengths of pavement concrete containing nano-particles are all enhanced to some extent. Firstly, the strength properties of pavement concrete are enhanced with the increasing amount of nano-particles, and the peak values are achieved at certain amount. Subsequently, the strength properties of pavement concrete are reduced with the increasing amount of nano-particles. The optimum amount of nano-TiO₂ and nano-SiO₂ added into pavement concrete are respectively 1.0% and 2.0%. The linear relationship between flexural and compressive strengths of pavement concrete containing nano-particles is obtained, which shows that the compressive strength of pavement concrete containing nano-particles enhances with increasing flexural strength, and this is favorable to the durability of pavement concrete.