ZJ-II expansion joint is a special grouting plugging material for the expansion joint. Low viscosity (near the viscosity of water) can be perfused into the subtle gaps of concrete to generate impermeable gel and filling the subtle gaps of the expansion joints to achieve the purpose of seepage blocking leakage.The slurry gel time can be accurately adjusted so as to control the diffusion radius, low permeability, good aging resistance in the water, and the slurry and gel are environmentally friendly and non-toxic, which is an almost ideal chemical grouting material.