Multifunctional polycarboxylic acid water reducing agent and preparing method thereof

The invention relates to the technical field of concrete additives, in particular to a multifunctional polycarboxylic acid water reducing agent and a preparing method thereof. By means of the water reducing agent, polycarboxylic acid of a branched structure is formed through free radical polymerizat...

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Bibliographische Detailangaben
Hauptverfasser: REN YUNJIE, QIAO LIFENG, PAN SHAOHUA, WANG ZHIJIE, QIN MANYI
Format: Patent
Sprache:chi ; eng
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Beschreibung
Zusammenfassung:The invention relates to the technical field of concrete additives, in particular to a multifunctional polycarboxylic acid water reducing agent and a preparing method thereof. By means of the water reducing agent, polycarboxylic acid of a branched structure is formed through free radical polymerization, the steric hindrance effect of side chains in molecules is enhanced, and the water reducing rate of the water reducing agent is increased; by introducing phosphate, the adsorption rate of the polycarboxylic acid water reducing agent on the surface of cement is increased, the water reducing rateis further increased, and the early strength is improved; after introduced diglycol is released, the viscosity of concrete can be remarkably reduced, and construction performance is improved; methylmethacrylate is added in the free radial polymerization reaction, in combination with all ester structures in polycarboxylic acid molecules, the encapsulation property of a gel material in the concrete can be remarkably improv