Mud-resistant agent for high-performance polycarboxylic acid water reducer as well as preparation method of mud-resistant agent

Abstract

The invention discloses a mud-resistant agent for a high-performance polycarboxylic acid water reducer as well as a preparation method of the mud-resistant agent. The invention relates to the technical field of a mud-resistant agent. The mud-resistant agent for the high-performance polycarboxylic acid water reducer comprises the following raw materials in parts by weight: 2 to 4 parts of polyethylene glycol, 1 to 2 parts of beta-cyclodextrin, 3 to 6 parts of hexadecyl trimethyl ammonium bromide, 0 to 40 parts of potassium chloride, 0 to 20 parts of sodium tripolyphosphate, 0 to 5 parts of citric acid, 0 to 1 part of EDTA-2Na and 150 to 273 parts of water. The preparation method of the mud-resistant agent for the high-performance polycarboxylic acid water reducer comprises the steps of sequentially dissolving the hexadecyl trimethyl ammonium bromide, the beta-cyclodextrin, the potassium chloride and / or the sodium tripolyphosphate, the citric acid and / or the EDTA-2Na with water with thetemperature of 80 to 100 DEG C, cooling to 40 DEG C, dissolving the polyethylene glycol and cooling to 20 to 30 DEG C. The mud-resistant agent can perform preferential adsorption or selective adsorption on mud in sand to reduce adsorption of water reducer molecules by the mud, so that the performance of the polycarboxylic acid water reducer is completely maintained and important significance in the development of the polycarboxylic acid water reducer is achieved.

Description

technical field [0001] The invention relates to the technical field of anti-mud agents, in particular to an anti-mud agent for high-performance polycarboxylate superplasticizers and a preparation method thereof. Background technique [0002] In recent decades, with the continuous development of concrete preparation and construction technology, the use of polycarboxylate water reducers to prepare high-performance concrete has become more and more widely used, and has become the development trend of concrete. Polycarboxylate superplasticizer has the advantages of small dosage, high water reducing rate, good cement adaptability, excellent slump retention performance, low chloride ion content and alkali content, small shrinkage rate and good durability, etc. It is widely used in housing construction and infrastructure construction projects. However, in the actual application process, it was found that the sand and mud content had a greater adverse effect on the concrete mixed w...

AI Technical Summary

Problems solved by technology

In recent years, natural sand resources are in short supply. With the acceleration of housing industrialization and the increase of infrastructure projects, a large amount of sand with high mud content is directly used in concrete, which makes the fresh concrete mixed with polycarboxylate superplasticizer The workability becomes worse, the slump retention ability decreases, and even the strength and durability of concrete are affected

[0003] At present, there is no effective way to solve the above problems. It can only be solved by increasing the amount of polycarboxylate superplasticizer, which increases the cost of concrete and increases the trouble of other processes.

However, although there are anti-mud agents on the market, whether it is powder or liquid anti-mud agents, they are actually one or more formulations of water-reducing agents. Easy to bleed, rapid slump loss, increased material cost

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