Micro silica is widely used in concrete, which makes concrete have higher compressive strength, water resistance and chemical resistance. This can reduce material costs and energy consumption. New nano materials, such as nano silica or nanotubes, lead to further improvement of resistance and strength. Nano silica particles or nanotubes are transformed into nano cement particles in the process of concrete solidification. Smaller particles lead to shorter particle distance, and materials with higher density and less porosity. This increases the compressive strength and reduces the permeability. However, one of the main disadvantages of nanopowders and materials is that they are easy to form aggregates during wetting and mixing. Unless the individual particles are well dispersed, caking will reduce the exposed particle surface, resulting in the degradation of concrete performance.