Shield backfill grouting slurry and preparation method thereof

The invention discloses shield backfill grouting slurry, and relates to the technical field of shield grouting and high polymer materials. The mortar is prepared from the following components in parts by weight: 15-20 parts of a curing and cementing additive, 80-90 parts of muck and 78-107 parts of water, the curing and cementing admixture is prepared from sebacic dihydrazide, inorganic acid, xanthan gum, dicyandiamide and silicon phosphate powder; the shield wall post-grouting slurry is good in fluidity and high in groutability before grouting, high in strength after grouting, good in waterproofness, high in temperature resistance and high in acid and alkali corrosion resistance, and can meet the requirements of shield wall post-grouting; the curing and cementing admixture forms an insoluble and infusible high polymer with a three-way net structure, has excellent insulating property, mechanical property and chemical stability, can accelerate slurry solidification, and can improve the overall strength, compre