Intensifier suitable for concrete prepared from manufactured sand and preparation method of mother solution thereof

Abstract

The invention relates to an intensifier suitable for concrete prepared from manufactured sand. The intensifier is prepared from the following components in parts by weight: 1 to 8 parts of TPEG, 8 to20 parts of triethanolamine, 4 to 15 parts of gellan gum, 3 to 10 parts of polyisoprene rubber latex, 3 to 10 parts of modified starch, 6 to 20 parts of sodium lignin sulfonate and 1 to 8 parts of filler. Compared with the prior art, the concrete intensifier has the advantages that the dosage of the modified starch and water is adjusted, and a proper amount of gellan gum and polyisoprene rubber latex is added, so that the thickening and water retention functions of the product on the concrete are improved on the basis of an original technique, the bad effects of multiple edges and corners andhigh mud and powder content of the manufactured sand on the concrete workability are improved, the sensitivity to use of water reducing agents such as polycarboxylic acid and the like in the manufactured sand concrete is reduced, the workability of the manufactured sand concrete is obviously improved, the bleeding and segregation phenomena are relieved, the homogeneity of the manufactured sand concrete is increased, and the strength dispersion of a solidification body of the manufactured sand concrete is reduced.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to a preparation method of a concrete strengthening agent and its mother liquor. Background technique [0002] The strong agent (reducer) used in concrete on the market can fully disperse the cement particles and prevent them from agglomerating together, so that some cement particles that can only serve as fillers can be fully hydrated and improve the pore structure of the concrete. And the interface transition zone, so that the cement stone structure becomes more dense and uniform, thereby significantly improving the strength of the concrete, and can reduce the amount of cement without reducing the strength of the original concrete. [0003] With the continuous development of the construction market, the natural sand used in the production of concrete is increasingly exhausted. At the same time, it is the general trend to use machine-made sand to produce concrete. Howev...

AI Technical Summary

Problems solved by technology

However, due to the many edges and corners of the machine-made sand and the large amount of mud and powder, the concrete prepared from the machine-made sand has poor workability, bleeding and segregation, which eventually lead to poor homogeneity of the concrete. Concrete strength is more discrete

At present, the commonly used strong agents (reducers) in the market can improve the workability of concrete and increase the strength of concrete, and the use effect is greatly reduced due to the complexity of machine-made sand.

For example, in the prior art, Chinese patent CN104016617B discloses a concrete strength agent, which contains isopentenol polyoxyethylene ether, triethanolamine, modified starch, sodium lignosulfonate, filler and moisture, but the strength The agent is also mainly suitable for concrete prepared with natural sand, and the effect is not ideal when it is applied to concrete produced with machine-made sand

Therefore, the adaptability of the existing potent agents is poor, resulting in limitations in their promotion and application.

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