Polycarboxylic acid super-retarding water reducing agent and preparation method thereof

The invention discloses a polycarboxylic acid super-retarding water reducing agent, relates to the technical field of water reducing agents, and in particular relates to a polycarboxylic acid super-retarding water reducing agent which comprises a polycarboxylic acid water reducing agent mother liquor, a polymerization inhibitor, an air entraining agent, a solidification inhibitor, a dispersing agent, a chain transfer agent and a proper amount of water. The retarder provided by the invention forms an insoluble film layer on the surface of cement particles, prevents further contact between the cement particles and water, delays hydration reaction of cement, can adjust the initial and final setting time of fresh concrete, and reduces or inhibits concrete slump loss caused by a high-efficiency water reducing agent. 本发明公开了一种聚羧酸超缓凝减水剂，涉及减水剂技术领域，具体一种聚羧酸超缓凝减水剂，包括聚羧酸减水剂母液，阻聚剂、引气剂、凝固抑制剂、分散剂、链转移剂和适量的水。本发明提出的缓凝剂在水泥颗粒表面形成一层不溶性质的膜层，阻止水泥颗粒与水的进一步接触，延缓水泥的水化反应，能够调整新拌混凝土的初终凝时间，减轻或抑制高效减水剂所引起的混凝土坍落度损失。