Antirust Method of Brushing the Surface of Reinforced Concrete with Nitrite Solution
A technology of reinforced concrete and nitrite, which is applied in the field of rust inhibition by nitrite solution on the surface of reinforced concrete, can solve problems such as slowness, and achieve the effect of simple and effective operation and speeding up penetration.
Active Publication Date: 2017-05-31
NINGBO UNIV
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Problems solved by technology
However, due to the slowness of natural penetration of nitrite in concrete, its application as a penetrating rust inhibitor on the surface of reinforced concrete structures is less
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[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0014] The anti-corrosion method of brushing the surface of reinforced concrete with nitrite solution comprises the following specific steps:
[0015] (1) Test the reinforced concrete structure with a steel corrosion tester to find out the rusted parts;
[0016] (2) The surface of the rusted part is frosted, and the frosted area is 1.2 to 1.5 times the area of the rusted part, and the frosted surface completely covers the rusted part;
[0017] (3) Blending nitrite into a saturated aqueous solution of nitrite;
[0018] (4) Moisten the frosted surface with a saturated aqueous solution of nitrite to form a water film on the frosted surface;
[0019] (5) Cover the frosted surface with a sponge that absorbs enough nitrite saturated aqueous solution, then cover the waterproof felt cloth on the sponge, and seal and fix the surrounding edges of th...
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The invention discloses a method for brushing a nitrite solution on the surface of reinforced concrete to inhibit rusting. The method is characterized by including: finding a rusty position, and frosting the surface of the rusty position; using a nitrite saturated water solution to moisten the frost surface to form a water film on the frost surface; covering the frosted surface with a sponge sufficiently absorbing the nitrile saturated water solution; covering the sponge with waterproof felt cloth, and hermetically fixing the edge around the waterproof felt cloth to the surface of a reinforced concrete structure; pressing a weight on the waterproof felt cloth to enable thickness of the sponge to be compressed by more than one third, and maintaining for 2-3 weeks. The method has the advantages that the method is simple, convenient and effective in operation, and permeation velocity of the nitrile solution in concrete can be increased, so that the nitrile solution is enabled to serve as a permeable rusting inhibitor to be externally coated on the surface of the reinforced concrete structure, is especially suitable for large-area antirust repairing of the reinforce concrete structure and has no obvious negative influence on structural performance of a concrete body.
Description
technical field [0001] The invention relates to an antirust method for reinforced concrete structures in the field of construction, in particular to a method for antirust by painting a nitrite solution on the surface of reinforced concrete. Background technique [0002] Nitrite, as a steel rust inhibitor in reinforced concrete structures, has a good corrosion inhibitory effect, and its antirust / rust prevention effect depends on the molar ratio of chloride ions to nitrite ions in concrete. The greater the chloride content, the NO required to inhibit steel corrosion 2 - / CI - The greater the molar ratio. my country's "Technical Specifications for the Application of Concrete Admixtures" stipulates: when the chlorine salt anti-rust concrete antifreeze agent is 0.5% to 1.5% of the cement weight, the ratio of sodium nitrite to chloride salt should be greater than 1; When the amount of chloride salt is 1.5% to 3% of the cement weight, the ratio of sodium nitrite to chloride sal...
Claims
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IPC IPC(8): C04B41/50
Inventor 孙武柳俊哲巴明芳贺智敏
Owner NINGBO UNIV