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Bridge concrete structure protection and repair material and preparation method thereof

A technology for concrete structures and repair materials, applied in the direction of anti-corrosion coatings, coatings, etc., can solve the problem that the corrosion phenomenon cannot be effectively avoided, and achieve good adhesion and anti-rust performance, prolong service life, and superior weather resistance.

Inactive Publication Date: 2016-10-05
GUANGZHOU CHENGXIN ROAD ENG EXAMINATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, invention patent ZL 201110245986.5 discloses a steel fiber rust prevention method, including steps: step 1, spraying a mixed aqueous solution of sodium hydroxide, sodium nitrate, and sodium nitrite on the steel fiber, so that the surface of the steel fiber is evenly covered A mixed aqueous solution of sodium hydroxide, sodium nitrate, and sodium nitrite; step 2, mixing the steel fiber and sodium hydroxide obtained in step 1 evenly; step 3, mixing the steel fiber and calcium hydroxide mixture obtained in step 2 at 130-150°C Fully dry at high temperature, that is, the anti-rust treatment of steel fibers is completed; this method cannot effectively avoid the corrosion phenomenon for concrete steel bars with high alkalinity.

Method used

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  • Bridge concrete structure protection and repair material and preparation method thereof
  • Bridge concrete structure protection and repair material and preparation method thereof

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Experimental program
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preparation Embodiment 1

[0037] A kind of antirust emulsion, after weighing each raw material by each raw material shown in table 1 and weight ratio, carry out following preparation steps:

[0038] (1) Mix the deionized water, emulsifier and initiator in the reactor and stir until dissolved, and slowly add the mixture of styrene (St), butyl acrylate (BA) and glycidyl methacrylate dropwise while stirring. A mixed monomer composed of ester (GMA) was pre-emulsified for 15 minutes to prepare a nuclear pre-emulsion for subsequent use;

[0039] (2) Mix the deionized water, emulsifier and initiator and stir until dissolved, and slowly add the mixture of butyl acrylate (BA), styrene (St), acrylate phosphate (EM-39) and The mixed monomer that monobutyl itaconate (MBI) constitutes makes the shell emulsion for subsequent use;

[0040] (3) Add deionized water, emulsifier, initiator and buffer in a four-necked flask equipped with a thermometer, agitator, and condenser. When the temperature is raised to 80°C, add ...

preparation Embodiment 2

[0043] A kind of antirust emulsion, its each raw material component and weight ratio are as shown in Table 1, and its basic preparation method is the same as embodiment 1.

preparation Embodiment 3

[0045] A kind of antirust emulsion, its each raw material component and weight ratio are as shown in Table 1, and its basic preparation method is the same as embodiment 1.

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Abstract

The invention relates to the technical field of protection of concrete structures, in particular to a bridge concrete structure protection and repair material and a preparation method thereof. The protection and repair material is prepared from an anti-rusting emulsion, an anti-rusting pigment, an anti-rusting agent, a dispersing agent, a defoaming agent, a coalescing agent, a pH regulator and water. The bridge concrete structure protection and repair material is subjected to coating application in bridge reinforced concrete structure damage, corrosion and exposed reinforcing bar repair, design indexes related to the bridge reinforced concrete structure damage, corrosion and exposed reinforcing bar repair can be met, good adhesion and rust resistance on reinforcing bars are achieved, a good repairing effect on rusty reinforcing bars can be achieved, the stability and durability of the concrete structure are improved, an external corrosive medium is effectively prevented from making contact with the reinforcing bars, the concrete reinforcing bars are effectively protected, and the service life of relates ridges is prolonged; in addition, the cost is low, pollution to environment is small, and therefore the bridge concrete structure protection and repair material is suitable for application and popularization in concrete structure protection and repair related fields.

Description

technical field [0001] The invention relates to the technical field of concrete structure protection, in particular to a bridge concrete structure protection repair material and a preparation method thereof. Background technique [0002] Concrete is a permeable pore network structure material commonly used in construction engineering. The permeability and the distribution of its porous network are the advantages of its widespread application. However, due to the long-term exposure of reinforced concrete structures to complex atmospheric environments , the reinforced concrete structure has been exposed to the complex atmospheric environment for a long time. Due to the shortcomings of the concrete itself, such as lack of density and poor crack resistance, the corrosive medium in the environment can easily penetrate into the interior of the concrete, causing corrosion of the internal steel bars and cracks along the bars. Affect the stability and durability of concrete structure...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D125/14C09D5/08C09D5/10C09D7/12
Inventor 余朝阳涂伟萍
Owner GUANGZHOU CHENGXIN ROAD ENG EXAMINATION