Concrete curing agent and preparation method thereof

Abstract

The invention provides a concrete curing agent which is prepared from the following components in parts by weight: 90-99 parts of core-shell structure macromolecule emulsion, 0-5 parts of film-forming aid, 0.1-2 parts of defoaming agent, 0-5 parts of leveling agent and 0-1 part of thickening agent. The concrete curing agent is simple in preparation method, the emulsion of a core-shell structure is prepared by using an emulsion polymerization method, hydroxyl groups are introduced into the shell layer, and the hydroxyl groups can have chemical bonding action with silicon atoms on the surface of the concrete, so that the binding force of the curing agent with the surface of the concrete is improved, and the water retention effect of the concrete curing agent is ensured.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a concrete curing agent with an emulsion type core-shell structure, and also relates to a preparation method of the concrete curing agent. Background technique [0002] Concrete curing is an important part of concrete construction. After the concrete is poured, it must be cured during the initial setting process, that is, to maintain the necessary humidity and temperature so that it has enough water to ensure the hydration reaction. Improper early maintenance can easily lead to concrete drying shrinkage cracking and insufficient hydration reaction, the latter can easily lead to the compactness of the concrete structure not meeting the design requirements; proper maintenance can greatly improve the durability, strength, wear resistance and volume stability of concrete sexual performance. [0003] The traditional maintenance methods include grass bag maintenance, plas...

AI Technical Summary

Problems solved by technology

However, the traditional styrene-acrylic emulsion has poor bonding force with the wet surface of freshly poured concrete, resulting in unsatisfactory water retention effect, and its maintenance effect is difficult to meet actual needs

[0004] Patent CN102010230 discloses a preparation method of concrete curing agent, but the organofluorine unsaturated monomer and organosilicon unsaturated monomer used in this method are expensive and costly; and the formed organofluorine and organosilicon polymer have strong hydrophobicity , which is not conducive to the wetting of the curing agent on the newly poured concrete surface and the uniform coating of the curing agent on the concrete surface

[0005] Patent CN102976652 discloses a method for preparing a concrete curing agent with a high water retention rate. However, this method is a traditional styrene-acrylic emulsion. The introduction of a core-shell structure can only reduce the minimum film-forming temperature of the emulsion, and cannot fundamentally improve the formed Inhibitory Effect of Curing Film on Surface Moisture of Fresh Concrete

[0006] Patent ZL02111497.8 discloses a water-based liquid film type concrete curing agent. However, this method is a curing agent formed by compounding acrylate polymer emulsion and wax emulsion. The compounding of physical effects does not have a positive synergistic effect, and the two poor compatibility

[0007] The inventions of the above-mentioned curing agents are all considered only from the curing agent itself, without considering the bonding effect of the curing agent and the concrete surface, so it is difficult to meet the actual needs