A moisture-retaining heat-insulating cement concrete curing agent and preparation method thereof

Abstract

The invention discloses a moisture preserving heat insulating cement concrete curing agent and a preparation method thereof, and relates to a cement concrete curing agent. The moisture preserving heat insulating cement concrete curing agent comprises the following components: 30%-60% of core shell hollow polymer particles, 1%-2% of an emulsion stabilizer, 2%-8% of a film forming assistant, 0-5% of a leveling agent, and balance of water. A foaming agent, an emulsifier and a foam stabilizer are added into the water, and stirred to obtain a foam inner core, the formed foam bubbles can be stable to suspend in the water, and an air inner core emulsion is obtained; hard monomers are added into the air inner core emulsion, so that the hard monomers are gathered on gas-liquid interface of foam, a water soluble initiator is added for emulsion polymerization, the foam stabilizer is added, an inner layer core shell hollow polymer particles emulsion is obtained, then soft hydrophilic monomers are added for polymerization to obtain a core shell hollow polymer particles emulsion with a soft outer shell, and the emulsion stabilizer, the film forming assistant and the leveling agent are added to obtain the moisture preserving heat insulating cement concrete curing agent with good moisture preserving heat insulating effect.

Description

technical field [0001] The invention belongs to the technical field of cement concrete maintenance, and relates to a cement concrete curing agent, in particular to a moisturizing and heat-insulating cement concrete curing agent and a preparation method thereof. Background technique [0002] As the most widely used material in the world, concrete plays an irreplaceable role in engineering. Concrete technology is a systematic project, which is closely related to all links from proportioning design, mixing, transportation, pouring, vibration to maintenance. Any problem in any link will have a serious impact on the quality of concrete. The early maintenance of concrete is an important part of concrete quality assurance. Improper early maintenance will lead to cracking due to drying shrinkage of concrete, surface dehydration and insufficient hydration will affect the strength and durability of concrete, and excessive internal and external temperature differences will also acceler...

AI Technical Summary

Problems solved by technology

Resins usually contain volatile solvents, which pollute the environment and endanger human health; latex-type curing agents have problems such as high cost, difficulty in removing the film after curing, and affecting the progress of subsequent projects; emulsions have obvious advantages, but also have small spray thickness , poor film density, small spraying area per unit mass, etc.

Inorganic curing agents are mainly silicate solutions, which reduce the evaporation rate of water by enhancing the surface compactness, but they cannot form a film and the water retention rate is insufficient

[0005] Chinese patent CN 103253985 B discloses a composite cement concrete curing agent and its preparation method. Although the film is compact and has good water retention, it is complicated to clean up as a coating with water-based epoxy resin.

[0006] Chinese patent CN103058544 B discloses a two-component curing agent for concrete. Due to the use of two-component film formation, it is necessary to spray twice, which will increase the cost of manual spraying.

Although the core-shell structure is adopted, because it is a solid core-shell structure, it has no heat insulation effect and the cost is high

[0008] To sum up, although there are many types of concrete curing agents at present, and the water retention properties meet the requirements, they generally do not have heat insulation performance, resulting in a large amount of coating and high cost.