Research on High Strength Easy Penetration of Cement Grouting Material

In view of the grouting difficulty of traditional cement materials, and organic materials are expensive, toxic and many other issues, a new type of cement grouting material is developed. Based on the optimization of micronization and additive of the grouting material, the seed setting rate of slurry can reach to 97%, and the stone body compressive strength of 1 d,3 d and 28 d can exceed 20 MPa,30 MPa,60 MPa, when the water cement ratio is 0.7 and the components achieve the best. By the industrial experiment, under the same conditions, the average deformation, subsidence of roof average, average floor heave amounts of the new grouting material section reduced by 349 mm, 20 mm, 334 mm, compared to the ordinary cement material section. It shows that the new cement grouting material has obvious reinforcement advantage.