The invention discloses a
gypsum-based hydraulic grouting material and a preparation method and application thereof. The grouting material is mainly composed of a
gypsum component, a
slag component, acement component, a sand component, a water
reducing agent component, a coagulation promoting component and a
water retention agent component. According to the grouting material, hydrated
calcium sulphoaluminate, namely
ettringite is generated under a reaction of
gypsum and
slag, so that the quantity of generated hydraulic minerals is large and stable; meanwhile, the
slag and
cement are subjectedto a secondary
hydration reaction to generate C-S-H gel so that grouting
slurry can stably exist in a base body to provide another strength source for the base body, an overall structure is formed with
ettringite, the mechanical properties of the foundation base body are improved, and the
softening coefficient of the foundation base body is increased; in addition, through the common functions ofthe three gel materials including the gypsum, the slag and the
cement, hydration and mineral reaction products in the foundation base body are stabilized, and the situation is avoided that after the local foundation base body encounters water, a lot of
strength loss is caused; besides, the coagulation promoting component is added, and the problem of coagulation retarding of the gypsum component issolved.