Concrete water-reducing agent and application thereof

Abstract

The invention discloses a concrete water-reducing agent and the application of the concrete water-reducing agent. The concrete water-reducing agent comprises the components by weight ratio: 58-80 parts of polycarboxylate high-performance water-reducing agent and 20-42 parts of compound containing hydroxyl and carboxyl. According to the concrete water-reducing agent, the advantages of the polycarboxylate high-performance water-reducing agent can be developed and the adaptability of the polycarboxylate high-performance water-reducing agent can be improved, in addition, the dosage is reduced, resources are saved, energy consumption is reduced and the comprehensive application cost of the polycarboxylate high-performance water-reducing agent can be lowered.

Description

technical field [0001] The invention relates to a concrete water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer (hereinafter referred to as PCA), as a new type of superplasticizer, has many unique advantages compared with other admixtures commonly used at present, and can play a better role in dispersion at low dosage. It is more suitable for low water-binder ratio concrete and is the first choice for high-performance concrete with high strength, self-compacting and high durability. [0003] PCA has a comb-shaped side chain molecular structure with polar groups such as sulfonic acid groups, carboxyl groups, polyethylene oxide groups, amine groups, hydroxyl groups, and ester groups. According to the analysis, the molecular structure model of PCA (such as figure 1 ), should include the following three levels: [0004] (1) Central linear main chain layer: mainly non-polar groups are connected to each other, which may ...

AI Technical Summary

Problems solved by technology

[0007] Due to the complex structure and synthesis mechanism of PCA

Although there are already such products in China, the current status is that only some manufacturers can really control the molecular structure of PCA through "structural design" to form a series of products. It is necessary to significantly reduce the production cost of PCA and improve its adaptability to achieve high performance. There is still a process for plasticizing effect and improving its plasticity

In addition, when PCA is used as a water-reducing agent, the cost is relatively high. When it is applied to concrete, the source ratio of concrete raw materials is relatively high, which limits its use.

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