Water-soluble grafting polycarboxylic acids dehydragent and preparation thereof

Abstract

The invention relates to a water-soluble grafting poly carboxylic acid water reducing agent and a preparation method thereof. The water-soluble grafting poly carboxylic acid water reducing agent is formed by the co polymerization of the monomers of five polymers of (A), (B), (C), (D) and (E). The preparation method is as follows: (1) polyether, polyester and the long side chain of a hetero atom are fetched in a polymer chain; (2), the pH value is regulated and neutralized; and (3) reactivation is carried out and a sulfonic group is fetched in. The water-soluble grafting poly carboxylic acid concrete water reducing agent prepared by the invention has the advantages of high water reducing rate, fixed absorption and anti-contraction performance, excellent comprehensive performance, good adaptability to cement, large slump constant retentivity, low cost, reasonable price and suitable popularization and application.

Description

technical field [0001] The invention relates to a polycarboxylate concrete water reducer and a preparation method of the polycarboxylate water reducer, in particular to a polycarboxylate water reducer with good slump retention ability and good adaptability to cement and its preparation method. Background technique [0002] Polycarboxylate superplasticizer is the preferred admixture for the preparation of vibration-free self-compacting high-performance concrete and high-strength ultra-high-strength high-performance concrete. It has good water solubility and stable performance. When added to concrete as a water reducing agent, it can have a strong dispersion effect on cement particles with a small amount of use, and this dispersion effect will not prolong over time. And significantly lower, that is, it shows better slump retention performance. And under the condition of maintaining the workability and high fluidity of the concrete, the water-cement ratio of the concrete can ...

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Problems solved by technology

However, it fails to further solve the adaptability problem of polycarboxylate superplasticizer, and in the actua

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