Abstract: Through the analysis of water separating rate, viscosity, stone body strength, durability and other tests on the two kinds of grouting materials of Portland cement and superfine cement, the experimental results show that the superfine cement has better stability and lower viscosity when the water cement ratio is greater than 0.8.The strength of the stone body is higher and the density of the stone has a compact structure and good durability.In the simulated grouting test of loess, the effect of grouting is summarized.The two kinds of grouting materials are similar to splitting soil in shape, to verify compliance with the laws of mechanics.Through soil mechanics experiment, the superfine cement squeeze better density of soil than Portland cement.It''s obvious that the shear strength of the soil is improved, and the compression ratio is lower than that of the Portland cement grouting soil.The results show that the superfine cement is more suitable for the prospect of grouting loess.

Key words: loess grouting;superfine cement;viscosity;stone body strength;durability