Concrete maintaining agent

Abstract

The invention relates to a curing agent of concrete, comprising styrene-acrylic emulsion, acrylamide solution, sodium silicate solution and organosilane solution; the styrene-acrylic emulsion is poured into the acrylamide solution; the sodium silicate solution and the organosilane solution are added and uniformly stirred with low speed to form the curing agent of the concrete; water soluble material with good film forming ability is used without solvent; neither volatile substances are generated nor secondary environmental pollution are caused; the invention comprises organosilane, rapidly penetrates into capillary pores wall inside the concrete, and then chemically reacts with part of the water and air in the concrete to generate silicon dioxide; the capillary pore channels are blocked, and a solid waterproof layer is formed to prevent evaporation of internal moisture and avoid invasion of external harmful substance, which helps to improve the durability of the concrete, keeps the concrete in a maintenance state for a long period, and improves durability of the concrete.

Description

technical field [0001] The invention relates to a water-based building material, in particular to a concrete curing agent. Background technique [0002] After the cement concrete is poured, it is necessary to have the necessary temperature and humidity during the initial setting process to ensure sufficient moisture for the hydration reaction to proceed completely. The traditional maintenance methods include laying grass bags, plastic films and watering. These methods are time-consuming , laborious, can not effectively block the evaporation of water, low water retention rate, poor maintenance effect. [0003] In order to improve its water retention rate, various concrete curing agents have appeared at present. The commonly used concrete curing agents are divided into two types: inorganic and organic. The inorganic type is mostly silicate concrete curing agents. The performance is low, and it cannot effectively prevent the efflorescence of concrete pores. After spraying and ...

AI Technical Summary

Problems solved by technology

[0002] After the cement concrete is poured, it is necessary to have the necessary temperature and humidity during the initial setting process to ensure sufficient moisture for the hydration reaction to proceed completely. The traditional maintenance methods include laying grass bags, plastic films and watering. These methods are time-consuming , Laborious, cannot effectively block the evaporation of water, low water retention rate, poor maintenance effect

[0003] In order to improve its water retention rate, various concrete curing agents have appeared at present. The commonly used concrete curing agents are divided into two types: inorganic and organic. The inorganic type is mostly silicate concrete curing agents. The performance is low, and it cannot effectively prevent the efflorescence of concrete pores. After spraying and curing, it will affect the appearance quality of concrete, and some will form a non-tough secondary covering film on the concrete surface. When exposed to water or wind and sun, It is very easy to hydrolyze and age and fall off; the organic type usually has resin type, latex type and emulsion type. Among them, the resin type curing agent contains volatile solvents, which is easy to pollute the environment and cannot meet the requirements of environmental protection. The maintenance of latex type curing agent after curing The film is firm and difficult to break, affecting the subsequent processes, and the cost is relatively high; the water retention rate and film-forming performance of the emulsion type curing agent are greatly improved compared with the above curing agents. The paraffin emulsion type curing agent developed in recent years The water retention rate is high, it is harmless to the environment, and the curing film is relatively easy to remove, but most of the developed paraffin emulsion curing agents use relatively expensive paraffin as raw materials, the amount of emulsifier is high, and the emulsifier formula is relatively complicated. Lead to higher production costs, which limits the popularization and application

[0004] Disclose a kind of concrete film curing agent and process method as the Chinese patent that the patent No. is ZL85105219, is to be made up of paraffin, stearic acid, aliphatic higher amine, glacial acetic acid and polyoxyethylene fatty alcohol ether, wherein paraffin and emulsifier The dosage ratio is 1:1, resulting in relatively high cost

[0005] The Chinese patent whose patent number is ZL99110818.3 discloses a kind of emulsion type concrete curing agent, comprises mixed petroleum hydrocarbon, emulsifier, water, and the water retention rate of this curing agent is 84.3%, and compressive strength is 87.9%, and its curing effect Compared with existing curing agents, it has improved to a certain extent, but it is still not ideal

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