Effect of nano titanium dioxide on anti-fouling performance of concrete

In view of the serious pollution of municipal engineering concrete, the anti-pollution concrete is prepared with nano-TiO2, the influence of nano-TiO2 on the working and mechanical properties of concrete is studied, and the influence of $\mathbf{nano}-\mathbf{TiO}_{2}$ on the anti-pollution performance of concrete is standardized by testing the growth of algae, The conclusions are as follows: the concrete that meets the construction requirements can be prepared after adding $\mathbf{nano}-\mathbf{TiO}_{2}$. However, because the particle size of $\mathbf{nano}-\mathbf{TiO}_{2}$ is very small, it needs to absorb more mixing water, resulting in the reduction of concrete working performance and the need to greatly increase the amount of admixture; with the increase of $\mathbf{nano}-\mathbf{TiO}_{2}$ content, the compressive strength of concrete at all ages is improved, the relative value of concrete fluorescence is significantly decreased, and the anti-pollution ability of concrete is improved; the most serious part of concrete biological pollution is the dry wet cycle area.