Polycarboxylate-type high-performance water reducing agent and synthesis method thereof

Abstract

The invention relates to the field of building material production, and provides a polycarboxylate-type high-performance water reducing agent and a synthesis method thereof, and the synthesis method comprises the following steps: S1, preparing a kettle base solution; s2, preparing a dropwise adding solution A; s3, preparing a dropwise adding solution B; and S4, dropwise adding the dropwise adding solution A and the dropwise adding solution B into the kettle bottom solution obtained in the step S1 at a constant speed, aging for 1 hour, then adding a neutralizer, and supplementing water to obtain the polycarboxylic acid high-performance water reducing agent. The synthetic method of the polycarboxylate-type high-performance water reducing agent is simple, feasible and easy to operate, two chain transfer agents and two oxidants are used in the preparation process, and the dropwise adding time of the material B is prolonged, so that the purposes of improving the conversion rate of the synthetic reaction and the product stability are achieved, and the yield of the polycarboxylate-type high-performance water reducing agent is improved. The prepared polycarboxylic acid high-performance water reducing agent is high in conversion rate and high in product stability.

Description

technical field [0001] The invention relates to the field of building material production, in particular to a polycarboxylic acid-based high-performance water reducer and a synthesis method thereof. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it can disperse the cement particles, improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement. At present, the common cross-linked polycarboxylate superplasticizer on the market has a high water reducing rate after being added to concrete, but the workability of concrete is poor, and the mother liquor itself has poor slump retention effect, which affects the field use effect. ...

AI Technical Summary

Problems solved by technology

The common cross-linked polycarboxylate superplasticizer currently on the market has a high water reducing rate after being added to concrete, but the workability of the concrete is poor, and the mother liquor itself has poor slump retention effect, which affects the field use effect.

Moreover, most of the mother liquors on the market use a high amount of oxidant, which is likely to cause poor appearance of the concrete test block after forming.

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