Concrete curing agent and preparation method thereof

Abstract

The invention discloses a concrete curing agent and a preparation method thereof. The concrete curing agent consists of the following components in percentage by weight: 60-70% of modified nano silicon dioxide solution, 20-30% of ethanol, 2-4% of tetramethoxy silane or tetraethoxysilane, 1-2% of 1mol / L nitric acid and 4-6% of deionized water. The preparation method comprises the following steps: adding nano silicon dioxide dispersion liquid into ethanol; adding the tetramethoxy silane or tetraethoxysilane; adding the deionized water and 1mol / L nitric acid; heating to 60 DEG C; and stirring for reacting for 3 hours to obtain the concrete curing agent. The prepared concrete curing agent can avoid the shortcomings of cracking, spalling and the like of traditional water-preservation curing coating; and meanwhile, after curing, the coating does not need to be cleared, and adverse effect on the pasting reprocessing of the surface or engineering construction application is avoided.

Description

technical field [0001] The invention relates to the field of concrete, in particular to a concrete curing agent and a preparation method thereof. Background technique [0002] In the construction or production process of prefabricated materials in highways, airports and cement factories, a large amount of water is required for its own hydration reaction due to the setting and hardening of cement. Therefore, the water retention and maintenance of the cementitious structure directly affects the quality of engineering or engineering prefabricated products. There is usually a curing period of 7 days to 28 days after concrete is poured. The shrinkage of concrete and the resulting cracking are a persistent problem in the quality of concrete engineering, and they have also been concerned by academic and engineering circles. In order to prevent water from being lost by evaporation during the curing process, conditions must be created during construction to fully hydrate the cement ...

AI Technical Summary

Problems solved by technology

[0004] 1) Polymer water-retaining curing agent: by spraying a layer of polymer resin material on the surface of the concrete after initial setting, such as paraffin wax, or various polymer waterproof emulsions, this type of material can effectively prevent the volatilization of water and play a very important role. Good waterproof and water-retaining maintenance effect, but the problem with this kind of material is that it is not easy to remove after the maintenance is completed, and the formed organic polymer layer affects the subsequent processing and use, such as causing poor adhesion, peeling, etc., which affect the quality of the project

The drying speed of the surface and the inside is different, resulting in a stress difference, which is easy to cause the surface layer to crack, peel, and fall off, thus losing the effect of water retention and maintenance, and affecting the hardening quality of the concrete behind

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