Viscosity modifier and preparation method thereof

Abstract

The invention provides a viscosity modifier. The viscosity modifier comprises 1 to 5 parts of a polymer monomer, 0.1 to 0.5 parts of a chain initiator, 0.1 to 0.5 parts of a chain terminating agent, 0.1 to 1 part of a catalyst, 0.1 to 0.8 parts of a preservative, 0.005 to 0.02 parts of an antifoaming agent, 0.01 to 0.05 parts of a colorant and 80 to 120 parts of the water. The molecular weight of the polymer monomer is less than 2000. The compatibility of the viscosity modifier and the polycarboxylic acid mother liquor is very good so that the viscosity modifier is easy to use, can realize the polycarboxylate mother liquor rapid dispersion and can ensure long-term stability. The viscosity modifier can improve cohesion of concrete, does not influence a water-reducing rate of an additive, slump retention and setting time and can effectively improve the later strength of concrete.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a viscosity modifier and a preparation method thereof. Background technique [0002] In recent years, with the development of large-scale national infrastructure projects such as national railways, ports, and nuclear power plants, and the requirements of these key projects for high-performance concrete, the market for carboxylic acid-based high-performance water reducers has developed rapidly. Polycarboxylate superplasticizer has the advantages of high water reducing rate, good slump retention performance and low shrinkage, and its market application rate is getting higher and higher. However, during the construction of high-fluidity concrete, polycarboxylate-based water-reducers with a high water-reducing rate will reduce the cohesion of concrete, and bleeding and segregation are prone to occur, which seriously affects the strength and durability of concrete. Wait. ...

AI Technical Summary

Problems solved by technology

[0004] At present, the construction generally increases the internal cohesion and water retention of concrete by adding viscosity modifiers, but there are compatibility problems between polycarboxylate superplasticizers and viscosity modifiers

At present, the most commonly used ones are cellulose ether viscosity modifiers and polyacrylamide viscosity enhancers to adjust the viscosity of concrete, and the viscosity enhancers cannot be dissolved in the polycarboxylate superplasticizer solution in advance

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