A kind of preparation method of anti-clay concrete admixture

Abstract

The invention discloses a preparation method of an anti-clay concrete admixture, which comprises the preparation of polyether-based glycidyl ether and the preparation of the anti-clay admixture. The preparation of polyether-based glycidyl ether is as follows: Oxyalkylene and catalyst react under certain temperature and pressure conditions to make polyether polyol; then continue to add epichlorohydrin and react under certain temperature and pressure conditions to obtain polyether-based glycidyl ether; anti-clay admixture The preparation is to react polyether-based glycidyl ether and secondary amine monomers under certain temperature and pressure conditions to obtain tertiary amino-based polyethers; then add halogenated hydrocarbons to tertiary amino-based polyethers, and React under pressure conditions to obtain the finished anti-clay admixture.

Description

technical field

[0001] The invention relates to a method for preparing a concrete admixture, in particular to a method for preparing a clay-resistant concrete admixture, and belongs to the application field of concrete admixtures. Background technique

[0002] Polycarboxylate superplasticizer is the third generation of high-performance superplasticizer, which has the characteristics of low dosage, high water reducing rate and good fluidity retention performance, and has been widely used in the concrete industry. With the increasing scarcity of high-quality natural sand and gravel aggregates, fly ash, slag and machine-made sand have been widely used in the concrete industry. On the one hand, these materials can improve the workability of concrete to a certain extent, on the other hand, the clay content and gradation control of these materials are insufficient, which leads to adaptability problems of polycarboxylate superplasticizers in concrete, and affects the working perfor...

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