Concrete mud resisting agent based on counter-insert layer design and preparing method thereof

Abstract

The invention relates to a concrete mud resisting agent based on counter-insert layer design and a preparing method. The method comprises the following steps that micro-molecule monomers, 2-butenoic acid, sodium methallyl sulfonate and hydroxyethyl methacrylate are stirred, dissolved and kept at the temperature of 70 DEG C-75 DEG C to obtain a uniform solution, then an oxidizing agent is added, and the mixture is stirred to obtain a uniform solution; a reducing agent and chain transfer agent mixture is added in a one-time mode, the mixture continues to be stirred for 2-4 h, pH is adjusted to be 8-9, and a proper amount of deionized water is added, so that the concrete mud resisting agent based on the counter-insert layer design is obtained. The method has the advantages that the prepared concrete mud resisting agent is provided with positive-charge functional group monomers, has a good ability to be adsorbed by montmorillonite clay preferentially, and can well stop polycarboxylate superplasticizer from being adsorbed between montmorillonite layers; the concrete mud resisting agent is high in adaptability, initial slump of concrete is increased, and the concrete has good workability.

Description

technical field [0001] The invention belongs to the field of building material admixtures, and in particular relates to a concrete anti-mud agent based on reverse intercalation design and a preparation method. Background technique [0002] In recent years, with the continuous development of my country's social economy, the demand for concrete for construction is increasing, the amount of sand and gravel has increased sharply, and high-quality sand and gravel resources have been exhausted. Most of the currently used sand and gravel have high mud content and unreasonable gradation. The mud in the sand is a clay mineral, the main component is montmorillonite, which is a layered silicate mineral. The sand with a high mud content will have a significant impact on the performance of the concrete mixed with polycarboxylate superplasticizer. Influence, especially when the mud content of sand and gravel is above 5%, it will make the concrete workability is not good or the slump loss...

AI Technical Summary

Problems solved by technology

The current solution to this problem is to increase the amount of polycarboxylate superplasticizer to reduce the impact of sand and mud on polycarboxylate water reducer. Large, and will increase the construction cost

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