Cement-based grouting material for crack resistance of semi-flexible pavement as well as preparation method and application of cement-based grouting material

The invention relates to the field of pavement materials, in particular to a cement-based grouting material for crack resistance of a semi-flexible pavement and a preparation method and application thereof.The grouting material is prepared from, by weight, 300-315 parts of water, 4.5-5.5 parts of a water reducing agent, 35-42.5 parts of fly ash, 0.5-2.5 parts of an early strength agent, 470-490 parts of cement, 120-139 parts of superfine sand, 50-68.5 parts of limestone mineral powder and 115-165 parts of an anti-cracking agent. The anti-cracking agent is formed by homogenizing steel slag powder, sulphoaluminate cement and dihydrate gypsum; the cement-based grouting material prepared by the invention is simple in production process, effectively utilizes the characteristic that the volume of the steel slag expands when encountering water, is superior in defect conversion, can effectively improve the volume stability of the cement-based grouting material for the semi-flexible pavement, enhances the interface bo