▎ 摘　　要

NOVELTY - Preparing composite concrete water-reducing agent comprises (i) dispersing modified microcapsules in the mother liquid of the water reducing agent by ultrasonic, adding initiator under the action of the redox system, synthesizing aqueous solution free radical aggregate using microcapsule modified water-receiving agent, (ii) weighing each component raw material according to the parts, mixing the microcapsulate modified water reduction agent with the remaining raw materials, and stirring uniformly to obtain a composite-type concrete water reducer, and (iii) mixing the modified microcapules with the rest raw materials. USE - Preparation of composite type concrete water reducing agent used for concrete additive. Uses include but are not limited to cement, sand, stone and water. ADVANTAGE - The method has the function of filling and repairing the crack generated by concrete plastic shrinkage, reduce the shrinkage crack in the concrete, can supplement water-reducing agent to the poured concrete, improves the over-thick phenomenon in concrete, and improving the mechanical property and durability of the concrete.