A kind of strong agent suitable for concrete prepared by machine-made sand and preparation method of mother liquor thereof

Abstract

The invention relates to a concrete strengthening agent suitable for machine-made sand preparation, and its ingredients include the following components: 1-8 parts by weight of isopentenol polyoxyethylene ether, 8-20 parts by weight of triethanolamine, 4 parts by weight of cold cement ‑15 parts by weight, 3‑10 parts by weight of polyisoprene latex, 3‑10 parts by weight of modified starch, 6‑20 parts by weight of sodium lignosulfonate, and 1‑8 parts by weight of filler. Compared with the prior art, the concrete strength agent of the present invention adjusts the dosage of modified starch and water, adds an appropriate amount of components cold gelatin and polyisoprene latex, and improves the thickening of the product on the basis of the original technology And water retention function, improve the adverse effects of machine-made sand grains with many edges and corners, large mud and powder content on the workability of concrete, reduce the sensitivity of polycarboxylate and other water-reducing agents in machine-made sand concrete, and significantly improve the performance of machine-made sand concrete Workability, relieve bleeding and segregation, improve the homogeneity of machine-made sand concrete, and reduce the strength dispersion of machine-made sand concrete solidified body.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to a concrete strength agent suitable for machine-made sand preparation and a preparation method for 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, and the production of concrete with machine-made sand h...

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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