The invention discloses a preformed material for post-tensioned prestressing pipeline vacuum grouting or mudjacking and a preparation method thereof. The preformed material includes the following components by weight percent: 65 to 95 percent of
silicate cement, 0.01 to 3 percent of high-range water-
reducing agent, 0 to 1 percent of stabilizing agent, 0.05 to 5 percent of retarding agent, 1 to 20 percent of expanding agent, 0.2 to 2 percent of
corrosion inhibitor, 0.01 to 1 percent of air entraining agent and 0 to 30 percent of mineral materials, wherein by uniformly and proportionally mixing the
silicate cement, the high-range water-
reducing agent, the stabilizing agent, the retarding agent, the expanding agent, the
corrosion inhibitor, the air entraining agent and the mineral materials, the post-tensioned prestressing pipeline vacuum grouting or mudjacking preformed material can be obtained. After being uniformly mixed and stirred with water with
neutral pH value according to the
water cement ratio ranging from 0.24 to 0.32, the preformed material can be used, the obtained grouting material has the advantages of low
water cement ratio, favorable flowability, no water bleeding and
delamination, and favorable pumpability; meanwhile, the preparation method of the preformed material is simple and the
raw material sources of the preformed material are wide.