Concrete curing compound and preparation method thereof

Abstract

The invention belongs to the field of a concrete admixture, and particularly relates to a concrete curing compound. The concrete curing compound is prepared from the following functional components by weight percent: 20-40% of water glass, 1-5% of polyaluminium sulfate, 2-8% of polyethylene glycol, 4-8% of organosilane, 0.1-0.3% of hydroxypropyl methyl cellulose and the balance of water. The concrete curing compound is low in cost, does not contain poisonous and harmful elements, has dual properties of compact and hard inorganic curing agent layer and an organic curing agent with good water-retention rate, enters into the concrete to promote hydration reaction by infiltration and diffusion action, has a compact surface structure, simultaneously can be crossly linked and combined with a hydration product and a surface layer silicon oxygen bond, and forms a rigid hydrophobic membrane layer. A concrete surface pore is plugged to prevent moisture evaporation, and plays the roles of penetration, maintenance, water conservation and autotrophic nutrition. The concrete curing compound is sprayed on the concrete surface, so that the concrete compression strength and the crack resistance can be effectively improved, and volume contraction is reduced.

Description

technical field [0001] The invention relates to a concrete curing agent, which can be used in construction projects of horizontal structures such as highways, airport runways, bridge pavements, etc., is especially suitable for the maintenance of concrete roads under high temperature, and belongs to the technical field of concrete admixtures. Background technique [0002] Curing is an important part of obtaining high-quality concrete. It not only affects the development of concrete strength, but also affects the durability of concrete, especially the performance of surface layer concrete. At present, the maintenance methods used in the project are mainly traditional maintenance methods such as spray watering maintenance, wet covering maintenance, plastic film maintenance, etc., which are time-consuming and labor-intensive and pollute the environment. Affected by the quality of construction personnel, work level and construction organization, the phenomenon of insufficient mai...

AI Technical Summary

Problems solved by technology

"Water-based liquid film type concrete curing agent" (patent number: CN1171831) developed by Fu Lefeng and others of Shanghai Sanrui Chemical Co., Ltd. and "a concrete curing agent" (patent number : CN101219867), all are formulated by styrene-acrylic emulsion, utilize organic solvent volatilization to form macromolecule film, because the hydrophobicity of styrene-acrylic macromolecule is poor, its water retention performance is not ideal, and film layer is flexible and easy to wear; Jiangsu The "preparation method of a concrete curing agent" (patent application number: 201010532946.4) developed by Li Lei and others of Bote New Materials Co., Ltd., although the hydrophobicity of styrene-acrylic polymers has been improved by introducing superhydrophobic group organic fluorine unsaturated monomers , the water retention rate can reach more than 95%, but there are many raw materials, long synthesis time, complicated process, and high cost, which is not reflected in the crack resistance of the surface layer.

Sichuan Huaying Construction Engineering Group Co., Ltd. Kuang Quanming and others developed the "multifunctional cement concrete shrinkage and anti-cracking curing agent" (patent number: CN101565284), which uses the shrinkage reduction mechanism of shrinkage reducing agent and the film-forming mechanism of organic polymer curing agent to combine two types of additives The mixture of anti-cracking agent, shrinkage reduction and enhanced maintenance effect is better, but the price of shrinkage reducing agent is high, and its preparation cost is also high

Therefore, curing agents need to be further studied and improved in terms of anti-cracking and shrinkage reduction performance, but there are few curing agents with this performance

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