Electrified composite repairing method for cement tower pole
By mixing 42.5R silicate cement, basalt gravel, and water-based epoxy resin emulsion to form a reinforcing agent, and then filling and brushing the cement tower surface with water-based epoxy resin in stages, the corrosion problem of cement towers was solved, achieving efficient and low-cost live-line repair.
Patent Information
- Application Number
- CN202511346578.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-19
- Publication Date
- 2025-11-21
AI Technical Summary
In existing technologies, corrosion of cement towers in the natural environment leads to the peeling of the protective layer, oxidation and rusting of the reinforcing bars, resulting in cracks and spalling of the tower body. Traditional repair methods have poor adhesion, insufficient waterproof and anti-corrosion performance, short service life, high cost, and require power outages for construction.
A reinforcing agent is formed by mixing 42.5R silicate cement, basalt gravel, and water-based epoxy resin emulsion. The mixture is filled and compacted in stages, and then coated with water-based epoxy resin and wrapped with fiberglass cloth to achieve live-line repair.
It improves the bonding strength and waterproofness of the repaired surface, extends its service life, reduces construction costs, and does not require power outages, resulting in a short construction period.
Smart Images
Figure CN120990419A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of power facility maintenance technology, specifically relating to a method for the energized composite repair of cement towers. Background Technology
[0002] 110kV cement towers are exposed to the natural environment for extended periods, making their surface susceptible to corrosion, leading to the peeling of the protective layer, cement delamination, and the penetration of water molecules after rain. This causes the steel reinforcement inside the tower to oxidize, rust, and expand, resulting in cracks, cement spalling, and exposed steel reinforcement. Without repair, this can lead to tower collapse or breakage, causing accidents, serious injuries, widespread power outages, and significant disruption to production and daily life. Traditional repair methods use ordinary cement mortar for filling, which suffers from poor adhesion, insufficient waterproofing and corrosion resistance, weak stress resistance, extremely short service life, and inability to completely solve the problem, potentially even causing further cracking. Replacing the tower is costly, and the prolonged power outage disrupts production. Summary of the Invention
[0003] This invention provides a composite repair method for live cement towers to address the above-mentioned problems.
[0004] To achieve the above objectives, the present invention employs the following technical solution: A method for repairing an electrified cement tower includes the following steps: S1, Remove corrosion products from the tower surface to expose a fresh base surface; S2 is a reinforcing agent formed by mixing 42.5R silicate cement, basalt crushed stone and water-based epoxy resin emulsion. S3, the reinforcing agent is filled into the fresh base surface in two stages, and manual compaction is performed after each filling of the reinforcing agent; S4. After the reinforcing agent dries, apply a water-based epoxy interface agent to the surface of the reinforcing agent. S5. After the water-based epoxy interface agent dries, apply water-based epoxy resin to the surface of the water-based epoxy interface agent in three coats. After each coat of water-based epoxy resin, wrap glass fiber cloth around the surface of the filler layer.
[0005] Furthermore, in step S1, the corrosion products on the tower surface are removed by using a high-pressure water gun.
[0006] Furthermore, in S2, the mass ratio of 42.5R silicate cement, basalt crushed stone, and water-based epoxy resin emulsion is 5:3:2.
[0007] Furthermore, in S2, the particle size of the basalt gravel is 3-5 mm.
[0008] Furthermore, in S3, the time interval between the two fillings of the reinforcing agent is ≥1 hour.
[0009] Furthermore, in step S4, the amount of water-based epoxy interface agent is 0.3 kg / m². The use of water-based epoxy interface agent can further improve the sealing and waterproof properties of the repaired surface.
[0010] Furthermore, in S5, the interval between two consecutive waterborne epoxy resin coatings is ≥24 hours, ensuring that the previous layer of waterborne epoxy resin is fully cured each time it is coated.
[0011] Furthermore, in S5, the density of the glass fiber cloth is 300 g / m².
[0012] Compared with the prior art, the present invention has the following advantages: The reinforcing agent of the present invention is formed by mixing 42.5R silicate cement, basalt crushed stone and water-based epoxy resin emulsion. The basalt crushed stone provides strength to the reinforcing agent. The mixture of 42.5R silicate cement and water-based epoxy resin emulsion forms a composite cementitious system. The corrosion resistance is improved through the synergistic effect of the two, and at the same time, the bonding strength of the reinforcing agent is further enhanced. The invention applies a water-based epoxy resin coating to the outermost layer, which greatly improves the hydrophobicity of the repaired surface, preventing water from penetrating and thus enhancing its resistance to environmental erosion. In addition, after applying the water-based epoxy resin, the invention wraps around glass fiber cloth, which effectively prevents the cured water-based epoxy resin from cracking and ensures the hydrophobicity of the repaired surface. Compared to replacing towers, this invention only repairs cement towers, does not require power outages, has a short construction period, low repair costs, and allows for live-line work. Attached Figure Description
[0013] Figure 1 This is a photo of the cement tower before it was repaired. Figure 2 This is a photograph of a cement tower repaired according to the present invention. Detailed Implementation
[0014] To further illustrate the technical solution of the present invention, the present invention will be further described below through embodiments.
[0015] A method for repairing an electrified cement tower includes the following steps: S1, use a high-pressure water gun to remove corrosion products from the tower surface and expose a fresh base surface; S2 is a reinforcing agent formed by mixing 42.5R silicate cement, 3-5mm basalt gravel, and water-based epoxy resin emulsion in a mass ratio of 5:3:2. S3, the reinforcing agent is filled into the fresh base surface in two stages, and manual compaction is performed after each filling of the reinforcing agent. The time interval between the two fillings of the reinforcing agent is ≥1 hour. S4. After the reinforcing agent dries, apply a water-based epoxy interface agent to the surface of the reinforcing agent. The amount of water-based epoxy interface agent is 0.3 kg / m². S5. After the water-based epoxy interface agent dries, apply water-based epoxy resin in three coats to the surface of the water-based epoxy interface agent. After each coat of water-based epoxy resin, wrap a glass fiber cloth with a density of 300g / m² around the surface of the filler layer. The interval between two adjacent coats of water-based epoxy resin should be ≥24 hours to ensure that the previous coat of water-based epoxy resin is fully cured before each coat.
[0016] In this embodiment, the waterborne epoxy resin emulsion is any one of AB-EP-20(W60) waterborne epoxy resin emulsion, AB-EP-20(W53) waterborne epoxy resin emulsion, or AB-EP-44(W55) waterborne epoxy resin emulsion; the waterborne epoxy interface agent is RJ-EJ epoxy interface agent or 302 epoxy interface agent; and the waterborne epoxy resin is RWE10 waterborne epoxy resin.
[0017] The foregoing has shown and described the main features and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.
[0018] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. A method for the composite repair of an electrified cement tower, characterized in that: Includes the following steps: S1, Remove corrosion products from the tower surface to expose a fresh base surface; S2 is a reinforcing agent formed by mixing 42.5R silicate cement, basalt crushed stone and water-based epoxy resin emulsion. S3, the reinforcing agent is filled into the fresh base surface in two stages, and manual compaction is performed after each filling of the reinforcing agent; S4. After the reinforcing agent dries, apply a water-based epoxy interface agent to the surface of the reinforcing agent. S5. After the water-based epoxy interface agent dries, apply water-based epoxy resin to the surface of the water-based epoxy interface agent in three coats. After each coat of water-based epoxy resin, wrap glass fiber cloth around the surface of the filler layer.
2. The method for energized composite repair of cement towers according to claim 1, characterized in that: In step S1, the corrosion products on the tower surface are removed by using a high-pressure water gun.
3. The method for energized composite repair of cement towers according to claim 1, characterized in that: In S2, the mass ratio of 42.5R silicate cement, basalt crushed stone, and water-based epoxy resin emulsion is 5:3:
2.
4. The method for energized composite repair of cement towers according to claim 1, characterized in that: In S2, the particle size of the basalt gravel is 3-5 mm.
5. The method for energized composite repair of cement towers according to claim 1, characterized in that: In S3, the time interval between the two fillings of the reinforcing agent is ≥1 hour.
6. The method for energized composite repair of cement towers according to claim 1, characterized in that: In S4, the amount of waterborne epoxy interface agent is 0.3 kg / m².
7. The method for energized composite repair of cement towers according to claim 1, characterized in that: In S5, the interval between two consecutive waterborne epoxy resin coatings is ≥24 hours to ensure that the previous layer of waterborne epoxy resin is fully cured each time it is coated.
8. The method for energized composite repair of cement towers according to claim 1, characterized in that: In S5, the density of the glass fiber cloth is 300 g / m².