Method for carrying out reinforced concrete anticorrosion by using nanometer silica

Abstract

The invention discloses a method for carrying out reinforced concrete anticorrosion by using nanometer silica. The method comprises the following steps: 1, processing the surface of concrete to make the surface be flattened, and brushing the surface with an aqueous blanket; 2, uniformly mixing two components of nanometer silica according to a ratio of 1:1, disposing for 2h, and uniformly coating the surface of the concrete with the obtained mixture to make a nanomaterial form a film; and 3, disposing for 6h or above, and coating the nanomaterial to improve the thickness of the nanomaterial formed film. The surface of common concrete, heavily stressed concrete and special additive concrete is protected by using the nanometer silica; a transparent or colored compact protection film with the thickness of 20-30[mu]m is formed on the surface of the concrete at normal temperature in order to meet long-term carbonizing resistance, anticorrosion, chloride ion penetration prevention, biological erosion prevention, and shedding and spalling prevention requirements of the concrete; and the above obtained protection coating layer has the characteristics of high wear resistance, high corrosion resistance and easy cleaning.

Description

technical field [0001] The invention relates to a method for anticorrosion of reinforced concrete, in particular to a method for anticorrosion of reinforced concrete by using nano silicon dioxide. Background technique [0002] When the concentration of sulfate in the environment is high, it will cause physical and chemical corrosion of concrete, and its strength and durability will be significantly reduced, which will endanger the project. At present, in areas with high sulfate concentration, such as: tunnel gypsum surrounding rock sections, anti-sulfate cement or adding concrete anti-sulfate corrosion preservatives are often used to prevent concrete from being corroded by sulfate. This method can reduce its chemical corrosion. , but it cannot solve the physical corrosion of concrete in areas with high sulfate concentrations. At present, there are still some methods of using concrete hydrophobic agent, concrete sealant and other methods to protect the sulfate corrosion of c...

AI Technical Summary

Problems solved by technology

[0002] When the concentration of sulfate in the environment is high, it will cause physical and chemical corrosion of concrete, and its strength and durability will be significantly reduced, which will endanger engineering.

At present, in areas with high sulfate concentration, such as: tunnel gypsum surrounding rock sections, anti-sulfate cement or adding concrete anti-sulfate corrosion preservatives are often used to prevent concrete from being corroded by sulfate. This method can reduce its chemical corrosion. , but it cannot solve the physical corrosion of concrete in areas with high sulfate concentration

At present, there are still some methods of using concrete hydrophobic agent, concrete sealant and other methods to protect the sulfate corrosion of concrete, but the effect is not good, and the corrosion of sulfate to concrete cannot be avoided. Therefore, a new type of concrete anti-corrosion is needed. corrosion method

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