Concrete anti-segregation agent for polycarboxylate-type water reducer and preparation method of concrete anti-segregation agent

• Main Authors: ZHU YERAN, WEN JINBAO, DU ZHIQIN, TANG XIUSHENG, CHEN GUOXIN
• Format: Patent
• Language: Chinese; English
• Published: 23.12.2022
• Subjects: ARTIFICIAL STONE; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; LIME, MAGNESIA; MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; REFRACTORIES; SLAG; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF NATURAL STONE

The invention discloses a concrete anti-segregation agent for a polycarboxylic acid water reducer and a preparation method of the concrete anti-segregation agent, and belongs to the technical field of concrete materials in building materials, and the concrete anti-segregation agent specifically comprises the following steps: firstly, preparing a long-chain branched copolymer from a monomer A, a monomer B and a cross-linking agent under the oxidation-reduction action; and uniformly stirring the long-chain branch copolymer, the sulfite and the chelating agent in proportion to obtain the concrete anti-segregation agent. The concrete anti-segregation agent prepared by the preparation method disclosed by the invention is compounded with a polycarboxylic acid water reducing agent for use, so that the compatibility problems of flocculation, layering and the like are avoided, the wrapping property and the flowability of the concrete can be obviously improved, the bleeding segregation phenomenon is avoided, and the wo