Sleeve grouting material for steel bar connection and preparation method thereof

The invention provides a sleeve grouting material for steel bar connection and a preparation method thereof and relates to the technical field of construction engineering. The sleeve grouting materialfor the steel bar connection is mainly prepared from raw materials including cement, aggregate, an admixture, a polycarboxylic water reducer, a plastic expanding agent, a compound expanding agent, aregulator and the like; the sleeve grouting material has great machine discharging flowability and flowability after 30min, slight expansion, early strength and high strength, is easy to produce and construct in the aspect of construction and has the advantages of reliable quality, low cost, shortened construction period, convenience for utilization and the like; the sleeve grouting material has long working time and strong environmental adaptability. The preparation method provided by the invention is simple and easy to operate; the sleeve grouting material for the steel bar connection, whichis applicable to room-temp