Ester polycarboxylate superplasticizer with rust inhibition function and preparation method thereof

Abstract

The invention relates to the technical field of concrete admixtures, in particular to an ester polycarboxylate superplasticizer with a rust inhibition function and a preparation method thereof. The ester polycarboxylate superplasticizer is prepared from an esterification product, an ester macromonomer, acrylic acid, an unsaturated polyhydroxy monomer and a rust inhibition functional monomer B with double bonds, amino groups and sulfur bonds through copolymerization. The esterification product is prepared from a rust inhibition functional monomer A with benzene rings and hydroxyl groups and unsaturated acid through esterification reaction. According to the ester polycarboxylate superplasticizer with a rust inhibition function, provided by the invention, the rust inhibition functional monomer A containing benzene rings and hydroxyl groups and the unsaturated acid are esterified to prepare an esterification product which participates in a next-step copolymerization reaction, so that the molecules of the polycarboxylate superplasticizer have groups such as the benzene rings, the amino groups and the hydroxyl groups, nitrogen atoms in the amino groups and the hydroxyl groups can improve the adsorption capacity with the surface of a steel bar and inhibit the electrochemical reaction process of the surface of the steel bar, meanwhile, the amino groups can be combined with H<+> on the cathode surface, the cathode reaction rate is reduced, and the corrosion inhibition effect of the steel bar is enhanced.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to an ester polycarboxylate water reducer with antirust function and a preparation method thereof. Background technique [0002] In recent years, with the continuous and rapid development of my country's economy, the intensity and scale of my country's infrastructure construction have also continued to increase, and the application of concrete components has also increased. Prestressed high-strength concrete pipe piles have the advantages of short construction period, excellent mechanical properties, high cost performance, and less construction conditions, and solve the problem of traditional piles such as driven prefabricated solid piles, bored piles, and vibrating sinking pipe piles. The disadvantages of the foundation are widely used in engineering foundations such as bridges, ports, and docks. [0003] For offshore buildings and buildings in saline-alkali areas, the...

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Problems solved by technology

[0007] In order to solve the problem that the steel bars of marine engineering and saline-alkali construction mentioned in the background technology are easily corroded, the present invention provides a kind of ester polycarboxylate water reducer with anti-corrosion function, wherein, esterified products, esters Macromonomer, acrylic acid, unsaturated polyhydroxy monomer and anti-corrosion functional monomer B with double bond, amino group and sulfur bond are prepared by copolymerization;

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