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Material for quickly repairing marine concrete in service and construction technology thereof

A technology of marine concrete and repair materials, which is applied in sea area engineering, water conservancy engineering, polyurea/polyurethane coatings, etc., can solve problems such as endangering human health, requiring high construction environment, polluting the environment, etc., and achieves the effect of prolonging the service life

Inactive Publication Date: 2010-12-08
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the marine anti-corrosion coatings widely used include: epoxy resin, polyurethane, acrylic resin and chlorinated rubber, etc., but they have high requirements on the construction environment, and conventional construction is difficult
At the same time, it cannot meet the harsh marine environment requirements, and the organic solvents used in these materials will seriously pollute the environment and endanger human health. Chlorinated rubber has even been banned by international organizations.

Method used

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  • Material for quickly repairing marine concrete in service and construction technology thereof
  • Material for quickly repairing marine concrete in service and construction technology thereof
  • Material for quickly repairing marine concrete in service and construction technology thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: (1) First use an electric steel brush to clean off the marine organisms and corroded peeling products on the damaged concrete surface, and then use a high-pressure water gun to wash away all residues and salt on the surface of the substrate, so that the substrate is fully exposed (2) Treat the cleaned concrete substrate. The substrate treatment system includes: primer, sealing putty, and repair putty. The primer is an organic solution of matching primer resin, and the matching putty (sealing putty, repair putty) is composed of primer resin and inorganic materials. The primer is a prepolymer (primer resin) formed by the reaction of isocyanate and hydroxyl compound, and then diluted with an organic solvent; the sealing putty is made of a mixture of primer resin and inorganic materials, and the repair putty is made of a primer A mixture of resin and inorganic materials. (3) Take 3.7 parts of MDI-100 and 46.3 parts of 220 polyether with a hydroxyl equivalent of ...

Embodiment 2

[0023] Embodiment 2: (1) Firstly, the marine organisms on the damaged concrete surface and the peeling products after corrosion are polished, and then the surface of the substrate is cleaned with a cleaning agent to reduce the salt concentration on the surface of the damaged concrete, so that the salinity on the surface of the concrete substrate The concentration returns to the normal value; (2) Treat the cleaned concrete substrate. The substrate treatment system includes: primer, sealing putty, and repair putty. The primer is an organic solution of matching primer resin, and the matching putty (sealing putty, repair putty) is composed of primer resin and inorganic materials. The primer is a prepolymer (primer resin) formed by the reaction of isocyanate and hydroxyl compound, and then diluted with an organic solvent; the sealing putty is made of a mixture of primer resin and inorganic materials, and the repair putty is made of a primer A mixture of resin and inorganic material...

Embodiment 3

[0024]Example 3: (1) First use a mechanical cleaning system to treat marine organisms on the damaged concrete surface and corroded spalling products, and then use a high-pressure water gun to wash away all residues on the surface of the substrate, so that the substrate completely presents a concrete entity structure while reducing the salt concentration on the surface of the substrate; (2) Treat the cleaned concrete substrate. The substrate treatment system includes: primer, sealing putty, and repair putty. The primer is an organic solution of matching primer resin, and the matching putty (sealing putty, repair putty) is composed of primer resin and inorganic materials. The primer is a prepolymer (primer resin) formed by the reaction of isocyanate and hydroxyl compound, and then diluted with an organic solvent; the sealing putty is made of a mixture of primer resin and inorganic materials, and the repair putty is made of a primer A mixture of resin and inorganic materials. (3...

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Abstract

The invention discloses a material for quickly repairing marine concrete in service, which is characterized by being prepared by reaction of an A component and an R component according to the volume ratio of 1:1, wherein the A component is a semi-prepolymer synthesized by 20-70 parts of low-functionality polyisocyanate by weight and 25-85 parts of polyether glycol by weight; and the R component comprises 15-60 parts of diamine chain extender by weight, 10-75 parts of amine terminated polyether by weight and 10-70 parts of hydroxyl terminated polyether by weight. The invention has the advantages that (1) a spray polyurea elastomer material capable of being cured quickly is adopted and can be cured and formed in a short time, and the tidal range time is fully used for repairing the damaged marine concrete structure; (2) the material prevents the seawater erosion and simultaneously has multiple functions of wear resistance, seawater impact resistance and the like, thereby effectively prolonging the service life of the marine concrete; and (3) the material has the solid content of 100% and does not contain any volatile organic solvent, thereby performing the sufficient environment-friendly effect on the marine environment.

Description

technical field [0001] The invention relates to a material for in-service rapid repair of marine concrete and its construction technology, belonging to the technical field of polymer materials. Background technique [0002] At present, our country is constructing infrastructure on a large scale, and the construction of roads and bridges is also increasing day by day. Therefore, the durability of bridge structures has been paid more and more attention by people. With the rapid development of the marine economy, the process of utilizing marine space is accelerating, and marine concrete structural engineering, such as breakwaters, wharfs, sea airports, subsea tunnels and sea-crossing bridges, is becoming more and more widely used. Under marine environmental conditions, long-term immersion in seawater, erosion, impact of wind and waves and tides will cause engineering corrosion problems of concrete structures. The corrosion damage of the concrete structure is mainly caused by ...

Claims

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Application Information

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IPC IPC(8): C09D175/02C04B41/48E02B3/16
Inventor 黄微波吕平李鑫茂张静
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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