Organosilicon concrete protective agent and preparation method

Abstract

The invention discloses an organosilicon concrete protective agent and a preparation method. The organosilicon concrete protective agent comprises the main compositions in percent by volume: 50-60% of an alkyl alkoxy silane, 5-10% of terminal-substituted polydimethylsiloxane, 3-5% of an emulsifier, 0.05-1% of a catalyst, 5-10% of a solvent and 20-30% of water. The protective agent is prepared by uniformly mixing the alkyl alkoxy silane, terminal-substituted polydimethylsiloxane and the emulsifier in the organic solvent at room temperature, then adding the catalyst to perform a uniform reaction, then dropwise adding the completely-reacted oil phase system into deionized water, and performing high-speed shearing for obtaining a paste. The preparation method is simple, the coating operation is simple, the cost is low, when the concrete surface is coated with the organosilicon concrete protective agent, a layer of a hydrophobic film is formed along the aperture inner walls of concrete, so that freeze-thaw cycle, chloride ion erosion and the like can be prevented, and the organosilicon concrete protective agent is applicable to facilities such as highways, bridges, tunnels, seaport wharfs, airports and the like, and is applicable to industrialized production.

Description

technical field [0001] The invention relates to an organosilicon concrete protective agent and a manufacturing method. Background technique [0002] Due to its superior performance, economy and durability, concrete has become an indispensable building material for modern industrial and civil buildings, harbor engineering, roads, tunnels and bridges. Until a few years ago, concrete was believed to be resistant to all harmful influences. But many accidents caused by concrete failure show that the actual situation is just the opposite, concrete is also vulnerable to damage, many concrete structures are in danger, and the economic loss caused by concrete failure has been increasing year by year. [0003] The damage of concrete structure is mainly caused by the erosion of temperature, water and other harmful substances in the environment where it is served. Water is the main factor and carrier of concrete damage, which can lead to direct physical damage, such as the tension cau...

AI Technical Summary

Problems solved by technology

This method has complex process, long reaction time, large energy consumption and high cost, and is not suitable for industrial production and application.