Bonding material for protecting sandstone type stone cultural relic body and protection method

The invention discloses a bonding material for protecting a sandstone type stone cultural relic body and a protection method, and relates to the technical field of sandstone type cultural relic protection, the technical key points are as follows: the bonding material comprises a bonding material and a grouting material, the bonding material comprises the following components by mass: 12-18% of superfine Portland cement, 0.5-1% of water glass, 8-12% of water, and 70-76% of hydraulic lime; the grouting material is composed of the following components: 97-98% of epoxy resin and 2-3% of metakaolin. According to the method, the bonding material is adopted for repairing the cultural relics, the compressive strength, the tensile strength and the shear strength of the sandstone cultural relics are remarkably improved, then the weather resistance and the corrosion resistance of the sandstone cultural relics are improved, and the method has important significance for protecting the cultural relics and improving the saf