Soil insensitive polycarboxylic acid water reducer and preparation method thereof

Abstract

The invention relates to a soil insensitive polycarboxylic acid water reducer and a preparation method of the reducer. The water reducer is prepared by taking a 4-hydroxybutyl vinyl ether macromonomer, unsaturated carboxylic acid, unsaturated sulfonate and an unsaturated ester micromonomer as a comonomer, and an initiator and a chain transfer agent as a molecular regulator for copolymerization reaction. A mass ratio of the 4-hydroxybutyl vinyl ether macromonomer to unsaturated carboxylic acid to unsaturated sulfonate to the unsaturated ester micromonomer to the initiator to the chain transfer agent to deionized water is (24-120):(4-8):(6-8):(10-20):(0.8-1.5):(0.4-2):(70-120). The invention further provides the preparation method of the water reducer. The water reducer is insensitive to a sand content of a sandstone material in concrete; when the water reducer is used for the concrete with the high sand content, the water reducer has higher water reducing capability and smaller slump loss than the traditional polycarboxylic acid water reducer; and the water reducer solves the problem that the traditional polycarboxylic acid water reducer is sensitive to soil, a raw material of sandstone, in the concrete application.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a water reducer insensitive to the mud content of sand and gravel materials in concrete, in particular to a non-soil sensitive polycarboxylate water reducer, which belongs to the technical field of building materials . The invention also relates to a preparation method of a polycarboxylate water reducer, in particular to a preparation method of a non-soil sensitive polycarboxylate water reducer. Background technique [0002] As a green and environmentally friendly concrete chemical admixture, polycarboxylate superplasticizer has been widely used in the industry because of its excellent functions. In many concrete projects, traditional high-efficiency concrete such as naphthalene series is increasingly unable to meet engineering needs due to limitations in technical performance. Polycarboxylate-based high-performance water-reducing agent, based on the mechanism of dispersing cement to des...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a non-soil-sensitive polycarboxylate water reducer, which is not sensitive to the mud content of sand and gravel materials in concrete, and can be used in concrete with high mud content to have higher Water-reducing ability and small slump loss to solve the problem of sensitivity to sand and gravel raw materials in the application of traditional polycarboxylate water-reducing agents in concrete applications

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