Polyurea-based elastomer material for concrete protection and anti-seepage of hydraulic structures

A technology of elastomer materials and hydraulic structures, applied in polyurea/polyurethane coatings, anti-corrosion coatings, coatings, etc., can solve problems such as reduced elasticity, low NCO content, poor coating density, etc., and achieve high durability , low water absorption and high elongation

Active Publication Date: 2020-05-15
李泽月
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the field of water conservancy and hydropower, polyurea is applied to the protective coating of concrete hydraulic structures (including dams, box culverts, channels, pipelines, tunnels) to withstand long-term blisters, water erosion, etc., resulting in polyurea coatings Softening, loss of elasticity, shedding
like Figures 9A to 9D The situation shown is that the traditional polyurea elastomer is destroyed in the existing water conservancy project, causing the polyurea coating to fail to protect concrete hydraulic structures from seepage, impact and wear resistance, and chemical corrosion protection
After analysis, the reason is that the NCO content in the polyurea coating is low, the coating density is poor, and the degree of adhesion to the concrete is low. It is a polyurethane coating, which does not meet the coating requirements of hydraulic structures in water conservancy and hydropower projects.

Method used

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  • Polyurea-based elastomer material for concrete protection and anti-seepage of hydraulic structures
  • Polyurea-based elastomer material for concrete protection and anti-seepage of hydraulic structures
  • Polyurea-based elastomer material for concrete protection and anti-seepage of hydraulic structures

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] The polyurea-based elastomer material provided by the present invention is used in the anti-seepage embodiment of the expansion joints of water delivery tunnels and box culverts. Since the water delivery tunnel needs to be used under long-term water immersion, the surface of the substrate during construction is a wet, low-temperature base surface Therefore, the polyurea-based materials used in this field should meet the above requirements, that is, they have the characteristics of high elongation, environmental protection, high NCO content, high urea bond, high solid content, low water absorption, and super water infiltration.

[0080] Among them, the water conveyance tunnel (such as Figure 4A ) and box culverts (such as Figure 4B ) expansion joint, which is sprayed with the polyurea-based elastomer material provided in this embodiment.

[0081] Figure 4C It is a schematic diagram of the use structure of the polyurea-based anti-seepage elastomer material in this em...

Embodiment 2

[0083] The polyurea-based elastomer material provided by the present invention is applied to the anti-seepage embodiment of the aqueduct. Since the aqueduct needs to be soaked in water for a long time, exposed to the sun for a long time, and alternately with and without water repeatedly, the polyurea-based elastomer material is used in this application field. The urea-based elastomer material should meet the above requirements, that is, it has the characteristics of high NCO content, high urea bond, high solid content, anti-scouring, low water absorption, and super water infiltration.

[0084] Among them, the channel for water diversion is shown by the arrow (such as Figure 5A ) and aqueducts (such as Figure 5B ) surface, on which the polyurea-based elastomer material provided in this embodiment is sprayed.

[0085] Figure 5C It is a schematic diagram of the structure of the polyurea-based anti-seepage elastomer material used in this embodiment. It can be seen from the fi...

Embodiment 3

[0088] For the polyurea-based elastomer material provided by the present invention is applied to the spillway in alpine area (such as Figure 6A ) anti-seepage, anti-shock and wear-resistant embodiment, the spillway in the alpine region operates below -20° in winter, and withstands the erosion of high-speed water flow (20-40m / s), the polyurea-based elastomer material used in this field needs To meet the performance of freeze-thaw resistance, impact and wear resistance, it should have the characteristics of high urea bond content, high cohesive energy, high elongation, high strength, low water absorption, high-speed water erosion resistance, impact and wear resistance. When used in spillways (such as Figure 6A) is spray-coated with the polyurea-based elastomer material provided in this embodiment.

[0089] Figure 6B and 6C It is a schematic diagram of the structure of the polyurea-based anti-seepage, impact-resistant and wear-resistant, freeze-thaw resistant elastomer mate...

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Abstract

The invention provides a polyuria-based elastomer material for protection and seepage prevention of concrete of a hydraulic building and a preparation method of the polyuria-based elastomer material.The polyuria-based elastomer material is prepared from a polyuria-based component A and a polyuria-based component B in the volume ratio being 1:1 through a reaction. The polyuria-based elastomer material has high binding force with the concrete surface, has good elasticity, impact resistance, wear resistance and chemical corrosion resistance, can adapt to moisture and low-temperature constructionenvironment and the use environment of long-time water soaking and high-speed water flow scouring and has the characteristics of being free from softening or shedding, corrosion-resistant, impact-resistant, wear-resistant, resistant to frost thawing, green, environmentally friendly and the like after being applied to the concrete surface of hydraulic buildings (including dams, water delivery tunnels, box culverts, channels and pipelines).

Description

technical field [0001] The invention belongs to the field of water conservancy engineering, and relates to an anti-seepage material used in a concrete protection and anti-seepage system for hydraulic structures (including: dams, channels, pipes, tunnels, box culverts, etc.), in particular to a moisture-adapted anti-seepage material. , low temperature, long-term water immersion resistance, chemical corrosion resistance and impact and wear resistance of polyurea-based elastomer materials. Background technique [0002] Water conservancy engineering buildings include dams, water tunnels, aqueducts, channels, pipelines, etc. The main body is composed of concrete materials. Concrete has the characteristics of rich raw materials, low prices, and simple production processes. At the same time, concrete also has high compressive strength. Good durability, wide range of strength grades and so on. However, in the research on the durability of concrete buildings, it is found that defect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D175/14C09D5/08C09D7/65C08G18/69C08G18/66C08G18/48C08G18/34C08G18/08
CPCC08G18/0823C08G18/348C08G18/4804C08G18/4854C08G18/6692C08G18/698C09D5/08C09D175/14C08L93/04C08K5/1345
Inventor 李炳奇李泽月
Owner 李泽月
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