Hydraulic concrete overflowing surface protection structure

Abstract

The utility model provides a hydraulic concrete overflowing surface protection structure, which is characterized in that a static defect part is repaired by using fiber reinforced mortar paint to form a fiber reinforced mortar coating, and a dynamic load defect part is repaired by using high-ductility repair mortar paint to form a high-ductility repair mortar coating; after the repair coatings of the static defect part and the dynamic load defect part are formed, the whole hydraulic concrete overflowing base surface is coated with a thin-layer durable repair mortar coating, and the fiber-reinforced mortar coating, the high-ductility repair mortar coating and all the other parts of the hydraulic concrete overflowing base surface are covered with the thin-layer durable repair mortar coating; and an inorganic water-based concrete sealing curing agent coating is brushed or sprayed on the thin-layer durable repairing mortar coating. The concrete overflowing surface of the medium-low-speed hydraulic engineering can be well protected, the surface strength and rigidity of the structure are enhanced, and the overflowing surface is flat and smooth under the condition that the sectional area of the overflowing surface is not increased.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete protective structures, in particular to a mechanical arm used for surface operations on dam concrete, suitable for water areas such as dam bodies. Background Art

[0002] In order to ensure the safety and long-term operation of the hydraulic concrete flow surface and reduce the flow surface resistance, the hydraulic flow structure must be repaired and the surface anti-corrosion treatment must be carried out. Purpose: In the common flow surface structure repair and protection construction, the repair and protection scheme is mostly to apply organic and inorganic protective materials. Specifically, according to the stress conditions of the flow section, cement-based penetrating crystallization materials, polyurea materials, epoxy ceramics and other "film-forming" protective materials will be applied to the flow surfaces of concrete piers, wing walls, culverts, aqueducts and other structures to improve the structure's anti-scouring, anti-penetration, and anti-freeze-thaw capabilities and ensure a smooth flow surface.

[0003] Existing film-forming protective materials have strong intermolecular forces, but insufficient adhesion to existing structures. They are also easily affected by substrate moisture, flatness, and rigidity, and are vulnerable to erosion by medium and low-speed water flows. Furthermore, most hydraulic structures are exposed to UV radiation for long periods of time, making the coatings susceptible to aging and flaking. Once flaked, they fall off in "film flakes," losing their protective effect on the concrete. Due to the special nature of hydraulic concrete, secondary repairs must wait until the next repair window. During the period between the flaking of the film-forming protective material and the secondary repair, the concrete structure on the flow surface remains unprotected and exposed to the environment, making secondary repairs more difficult and increasing maintenance costs. Utility Model Content

[0004] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a hydraulic concrete flow surface protection structure, which can achieve good protection for the medium and low-speed hydraulic concrete flow surface, strengthen the surface strength and rigidity of the structure, and make the flow surface flat and smooth without increasing the cross-sectional area of ​​the flow surface. The protective structure layer also has the ability to resist ultraviolet light, which can effectively extend the protection time and reduce the difficulty and cost of secondary repair.

[0005] In order to achieve the above technical features, the purpose of the utility model is achieved as follows: a hydraulic concrete flow surface protection structure includes a hydraulic concrete flow base surface, and a static defect portion and a dynamic load defect portion are provided on the hydraulic concrete flow base surface; the static defect portion is repaired using a fiber-reinforced mortar coating to form a fiber-reinforced mortar coating, and the dynamic load defect portion is repaired using a high-ductility repair mortar coating to form a high-ductility repair mortar coating;

[0006] After the repair coatings are formed on the static defect parts and the dynamic load defect parts, a thin layer of durable repair mortar coating is applied to the entire hydraulic concrete flow base surface, covering the fiber-reinforced mortar coating, the high-ductility repair mortar coating and all other parts of the hydraulic concrete flow base surface;

[0007] Apply or spray an inorganic water-based concrete sealer and curing agent coating on top of a thin layer of durable repair mortar coating.

[0008] The hydraulic concrete flow base surface is provided with a joint portion, and the joint portion is repaired using a high-ductility repair mortar coating to form a high-ductility repair mortar coating;

[0009] After the repair coating is formed at the joints, a thin layer of durable repair mortar coating is applied to the entire hydraulic concrete flow base surface, covering the fiber-reinforced mortar coating, high-ductility repair mortar coating and all other parts of the hydraulic concrete flow base surface;

[0010] Apply or spray an inorganic water-based concrete sealer and curing agent coating on top of a thin layer of durable repair mortar coating.

[0011] The inorganic water-based concrete sealing and curing agent coating is a lithium-based concrete sealing and curing agent.

[0012] The thickness of the entire hydraulic concrete flow surface protection structure is 450~1000μm.

[0013] The utility model has the following beneficial effects:

[0014] 1. The utility model adopts different coatings to repair various defects existing on the flow surface of hydraulic concrete, including static defects and dynamic load damage defects; among them, fiber-reinforced mortar coating is used to form a repair coating for repairing static defects, and the "crack resistance, toughness, impact resistance and durability" of this type of material can be used to prevent the static defects from continuing to expand; among them, high-ductility repair mortar coating is used to form a repair coating for repairing dynamic load damage defects or / and joints, and the "high flexibility and high tensile strength without breaking" properties of this type of material can improve the ability of dynamic load damage defects or / and joints to resist water impact, scouring erosion and cavitation, thereby improving the stability of the entire hydraulic concrete flow base surface. Then, a thin layer of durable repair mortar coating is covered on the fiber-reinforced mortar coating, high-ductility repair mortar coating and the non-repaired parts of the hydraulic concrete flow surface. The thin layer of durable repair mortar coating has excellent "adhesion, wear resistance, corrosion resistance and durability" and can well repair cracks, peeling and wear defects on the concrete base surface. Then, an inorganic water-based concrete sealing and curing agent coating is covered on top of the thin layer of durable repair mortar coating. By utilizing its permeability and reactivity (reacting with calcium ions in concrete to form a stable gel), the harmful pores on the surface of the thin layer of durable repair mortar coating and the hydraulic concrete flow base surface are effectively sealed, isolating the erosion of harmful substances, improving the hardness, wear resistance and impermeability of the surface of the protective structure, achieving a long-term protective effect, and extending the durability of the protective structure.

[0015] 2. The protective structure of the utility model is suitable for repairing thin layers of the surface of medium and low-speed hydraulic concrete flow surfaces, repairing structural defects, and reinforcing the surface strength and rigidity of the structure. Without increasing the cross-sectional area of ​​the flow surface, the hydraulic concrete flow surface can be restored to be flat and smooth, and long-term protection can be maintained.

[0016] 3. This utility model utilizes an inorganic protective material (an inorganic water-based concrete sealing and curing agent coating) on ​​the surface of the protective structure to seal and protect the soil flow repair layer (a fiber-reinforced mortar coating, a high-ductility repair mortar coating, and a thin layer of durable repair mortar coating). This further enhances its erosion and frost resistance, imparts hydrophilicity to the surface, increases water flow rate, and reduces the adhesion of aquatic organisms. The protective structure also offers UV resistance, effectively extending the protection period and reducing maintenance costs for the hydraulic concrete flow surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Figure 1 This is a schematic diagram of the hydraulic concrete flow surface protection structure of Example 1.

[0019] Figure 2This is a schematic diagram of the hydraulic concrete flow surface protection structure of Example 2.

[0020] In the figure: hydraulic concrete flow base 1, thin layer of durable repair mortar coating 2, inorganic water-based concrete sealing and curing agent coating 3;

[0021] Static defect location 11, dynamic load defect location 12, joint location 13;

[0022] Fiber-reinforced mortar coating 110 and high-ductility repair mortar coating 120. DETAILED DESCRIPTION

[0023] The embodiments of the present invention will be further described below with reference to the accompanying drawings.

[0024] Example 1:

[0025] A hydraulic concrete flow surface protection structure, comprising:

[0026] A fiber-reinforced mortar coating 110 and a high-ductility repair mortar coating 120 are formed on the hydraulic concrete flow base surface. The fiber-reinforced mortar coating 110 is located at the static defect area of ​​the hydraulic concrete flow base surface, and the high-ductility repair mortar coating 120 is located at the dynamic load damage defect area 12 and / or the joint area 13 of the hydraulic concrete flow base surface.

[0027] Among them, a thin layer of durable repair mortar coating 2 is also commonly covered on the non-defective parts and non-joint parts of the fiber-reinforced mortar coating 110, the high-ductility repair mortar coating 120 and the hydraulic concrete flow base 1, and an inorganic water-based concrete sealing and curing agent coating 3 is covered on the thin layer of durable repair mortar coating 2.

[0028] In a preferred embodiment of the present invention, the fiber-reinforced mortar coating 110 is at least one of the commercial products Sika® Monotop®-610 (produced by Sika), MasterEmaco® S 5400 FX (produced by BASF), Mapei Planitop20 Plus (produced by Mapei), Betomor® Multi A, Xi'anWuHe durable repair type C material, MC-EstrifanRIS, Sino-German Xinya HPC shrinkage-free self-compacting polymer concrete, Luoyang HT-1, Yingshuo P720, Bokang BK-008, and Jushi JC-06, or is prepared by itself.

[0029] In a preferred embodiment of the present invention, the high-ductility repair mortar coating 120 is at least one of the commercial products Sika®MonoTop®-620 WP (produced by Sika), MasterEmaco® T 1060 CR (produced by BASF), MapeiMapegrout Thixotropic (produced by Mapei), Wuhe high-ductility concrete, KOESTER NBI, Fenyangtang JS-II, and Degao K11 flexible type, or is prepared by itself.

[0030] In a preferred embodiment of the present invention, the thin layer of durable repair mortar coating 2 is at least one of the commercial products Sika®MonoTop®-615 (produced by Sika), MasterEmaco® T 1060 CR (produced by BASF), MapeiPlanitop 20 Plus (produced by Mapei), Epoxytec Epo-Patch (produced by Epoxytec), CortecMCI®-2005 Mortar (produced by Cortec), Oriental Yuhong PCC-501, and Wuhe WGM-R2, or is prepared by itself.

[0031] In a preferred embodiment of the present invention, the inorganic water-based concrete sealing and curing agent coating 3 is at least one of the commercial products Lithi-Tek 9500 (produced by Convergent Concrete Technologies), Ashford Formula (produced by Curecrete Chemical Company), CreteSeal Plus (produced by Prosoco), Densifier XHSC (produced by BASF), Guard Hardener & Sealer (produced by Guard Industry), KOSTER KBE, Beijing Yishengyuan Nano Glue Type I, Oriental Yuhong RSC-602, Oriental Yuhong RSC-601, Oriental Yuhong HCA-101, or is prepared by itself.

[0032] In a preferred embodiment of the present invention, the inorganic water-based concrete sealing and curing agent coating 3 is a lithium-based concrete sealing and curing agent. The curing agent has strong permeability, which can further seal the pores and fine defects on the mortar surface, enhance its surface anti-scouring ability and hydrophilicity, greatly reduce the probability of freshwater organisms (algae, mosses) attaching, and increase the water flow rate.

[0033] In a preferred embodiment of the present invention, the thickness of the entire hydraulic concrete flow surface protection structure is 450-1000 μm. Through thin layer repair, the flow surface remains flat and smooth without increasing the cross-sectional area of ​​the flow surface.

[0034] Explanation of special terms:

[0035] Fiber-reinforced mortar coating is a material that improves the mechanical properties of ordinary mortar by adding fibers (such as polypropylene fibers, glass fibers, steel fibers, etc.). These fibers can increase the mortar's crack resistance, toughness, impact resistance, and durability.

[0036] High-ductility repair mortar coating is a mortar material with high ductility and toughness, usually achieved by adding polymer emulsion or other modifiers. It can withstand large deformation without breaking and is suitable for repairing parts / places that require high flexibility.

[0037] Thin layer durable repair mortar coating is a thin layer material used to repair and protect the surface of concrete structures. It has good adhesion, wear resistance, corrosion resistance and durability, and can effectively repair cracks, spalling, wear and tear on the concrete base surface. The material can be polymer-modified cement-based mortar, epoxy resin mortar or other high-performance materials.

[0038] Inorganic water-based concrete sealer coatings are inorganic materials used to strengthen and protect concrete surfaces. These materials are typically water-based and penetrate the concrete, reacting with calcium ions in the concrete to form stable compounds, thereby increasing the concrete's hardness, wear resistance, and impermeability.

[0039] Static defects in the flow-through surface of hydraulic concrete structures refer to existing defects in the concrete structure that do not change significantly over time or due to water flow. These defects typically develop during the construction process or early service life due to improper construction, material problems, design flaws, or other reasons. Types of static defects include cracks, honeycombing, roughness, exposed reinforcement, voids, and spalling. Cracks can be classified into surface cracks (appearing only on the concrete surface and are typically shallow), through-cracks (extending from the concrete surface into the interior, or even through the entire structure), shrinkage cracks (caused by water evaporation during the concrete hardening process), and temperature cracks (stress cracks caused by temperature differences between the inside and outside of the concrete).

[0040] Dynamic load failure defects in hydraulic concrete flow surfaces refer to damage to concrete structures caused by dynamic loads (such as water impact, wave action, ice impact, and ship collision). These dynamic loads are often cyclical or sudden, causing continuous or transient stress on the concrete surface and internal structure, leading to various types of damage. Types of dynamic load failure defects primarily include erosion (scour erosion and cavitation), wear, cracks that expand from existing static cracks under dynamic loads, and spalling and shedding (flaking or shedding of the concrete surface or localized areas due to dynamic loads, exposing internal steel bars or aggregate).

[0041] Joints in hydraulic flow surfaces are gaps created between concrete structures or concrete blocks during hydraulic engineering construction to accommodate factors such as temperature fluctuations, uneven foundation settlement, and construction requirements. These joints are intended to prevent cracking or damage to the structure caused by these factors. Joint types include flat joints (flat contact between two concrete blocks), keyway joints (joints with keyways to enhance connection strength), lap joints (joints where one concrete block partially covers another), and serrated joints (joints with serrated edges to enhance shear resistance).

[0042] Example 2:

[0043] like Figure 1 The figure shows a schematic diagram of the hydraulic concrete flow surface protection structure of Example 1 of the present utility model, which includes a hydraulic concrete flow base surface 1, and a static defect portion 11 and a dynamic load defect portion 12 on the hydraulic concrete flow base surface 1, wherein the static defect portion 11 is repaired using a fiber-reinforced mortar coating to form a fiber-reinforced mortar coating 110, and the dynamic load defect portion 12 is repaired using a high-ductility repair mortar coating to form a high-ductility repair mortar coating 120. After the repair coatings of the static defect portion 11 and the dynamic load defect portion 12 are formed, a thin layer of durable repair mortar coating 2 is applied to the entire hydraulic concrete flow base surface 1, which covers the fiber-reinforced mortar coating 110, the high-ductility repair mortar coating 120 and all other parts of the hydraulic concrete flow base surface 1. Finally, an inorganic water-based concrete sealing and curing agent coating 3 is brushed or sprayed on the thin layer of durable repair mortar coating 2, thereby forming a Figure 1 The protective structure of the hydraulic concrete flow surface shown.

[0044] Among them, the fiber-reinforced mortar coating 110 is formed by applying the product Sika® Monotop®-610 (produced by Sika), the high-ductility repair mortar coating 120 is formed by applying the product Sika® MonoTop®-620 WP (produced by Sika), the thin-layer durable repair mortar coating 2 is formed by applying the product ika® MonoTop®-615 (produced by Sika), and the inorganic water-based concrete sealing and curing agent coating 3 is formed by spraying the product Lithi-Tek 9500 (produced by Convergent Concrete Technologies).

[0045] Example 3:

[0046] like Figure 2The figure shows a schematic diagram of the hydraulic concrete flow surface protection structure of Example 1 of the present utility model, which includes a hydraulic concrete flow base surface 1, on which a static defect portion 11, a dynamic load defect portion 12 and a joint portion 13 are provided, wherein the static defect portion 11 is repaired using a fiber-reinforced mortar coating to form a fiber-reinforced mortar coating 110, and the dynamic load defect portion 12 and the joint portion 13 are repaired using a high-ductility repair mortar coating to form a high-ductility repair mortar coating 120. After the repair coatings of the static defect portion 11 and the dynamic load defect portion 12 are formed, a thin layer of durable repair mortar coating 2 is applied to the entire hydraulic concrete flow base surface 1, which covers the fiber-reinforced mortar coating 110, the high-ductility repair mortar coating 120 and all other portions of the hydraulic concrete flow base surface 1. Finally, an inorganic water-based concrete sealing and curing agent coating 3 is applied or sprayed on the thin layer of durable repair mortar coating 2, thereby forming a Figure 2 The protective structure of the hydraulic concrete flow surface shown.

[0047] Among them, the fiber-reinforced mortar coating 110 is formed by applying the product MasterEmaco® S 5400 FX (produced by BASF), the high-ductility repair mortar coating 120 is formed by applying the product MasterEmaco® T 1060 CR (produced by BASF), the thin-layer durable repair mortar coating 2 is formed by applying the product MasterEmaco® T1060 CR (produced by BASF), and the inorganic water-based concrete sealing and curing agent coating 3 is formed by spraying the product CreteSeal Plus (produced by Prosoco).

[0048] Example 4:

[0049] During the construction of the above-mentioned hydraulic concrete flow surface protection structure, the construction process is as follows:

[0050] (1) Fiber-reinforced mortar is used to repair and reinforce static defect areas, and high-ductility repair mortar is used to reinforce and repair dynamic defect areas / joint areas.

[0051] (2) Apply a thin layer of durable repair mortar to the entire surface to restore the overall structural surface to a flat and smooth state.

[0052] (3) After the surface of the thin layer of durable repair mortar is dry, spray the inorganic water-based concrete sealing and curing agent. After drying, the hydraulic concrete flow surface protection structure is completed.

[0053] Among them, high-ductility repair mortar is used to repair the dynamic load defect parts / joint parts of the hydraulic concrete flow surface. The mortar contains a large amount of micron-level fibers and additives, has good toughness and high tensile strength, and can achieve good repair of dynamic load defects to prevent them from continuing to increase under long-term dynamic loads or even cracking and falling off.

[0054] A thin layer of durable repair mortar is used on the entire surface. The mortar contains active penetrating components and anti-cracking fibers. The penetrating components can penetrate into the hydraulic concrete flow base, the fiber-reinforced mortar coating surface, and the high-ductility repair mortar coating surface, so the bonding strength is high; and the mortar itself has an extremely low shrinkage rate and is tough. It can automatically produce a certain adaptive deformation according to the direction of force, and after deformation, it can also maintain the material itself from cracking and damage.

[0055] The surface of the thin-layer durable repair mortar is treated with an inorganic water-based concrete sealant, preferably a lithium-based one. Leveraging its strong penetration into the concrete mortar, this seals pores and minor defects on the mortar surface, preventing the ingress and erosion of harmful substances. This enhances the surface's erosion resistance and hydrophilicity, significantly reducing the likelihood of freshwater organisms (algae and mosses) attaching and increasing water flow. Because the fiber-reinforced mortar, high-ductility repair mortar, thin-layer durable repair mortar, and inorganic water-based concrete sealant are inorganic materials, they offer strong resistance to solar UV radiation and excellent weather resistance, extending the protection period and significantly reducing repair frequency. Even if shedding occurs after a period of operation, it is typically spot-on, rather than surface-on, as with organic polymer emulsions. Subsequent maintenance only requires repair of the shedding points, significantly reducing repair costs and complexity.

Claims

1. A hydraulic concrete flow surface protection structure, characterized in that: The invention comprises a hydraulic concrete flow-through base surface (1), wherein the hydraulic concrete flow-through base surface (1) has a static defect portion (11) and a dynamic load defect portion (12); the static defect portion (11) is repaired using a fiber-reinforced mortar coating to form a fiber-reinforced mortar coating (110), and the dynamic load defect portion (12) is repaired using a high-ductility repair mortar coating to form a high-ductility repair mortar coating (120); After the repair coatings are formed on the static defect portion (11) and the dynamic load defect portion (12), a thin layer of durable repair mortar coating (2) is applied to the entire hydraulic concrete flow base surface (1), and the fiber-reinforced mortar coating (110), the high-ductility repair mortar coating (120) and all other portions of the hydraulic concrete flow base surface (1) are covered; An inorganic water-based concrete sealing and curing agent coating (3) is brushed or sprayed on the thin layer of durable repair mortar coating (2).

2. The hydraulic concrete flow surface protection structure according to claim 1, characterized in that: The hydraulic concrete flow base surface (1) has a joint portion (13), and the joint portion (13) is repaired using a high-ductility repair mortar coating to form a high-ductility repair mortar coating (120); After the repair coating at the joint portion (13) is formed, a thin layer of durable repair mortar coating (2) is applied to the entire hydraulic concrete flow base surface (1), covering the fiber-reinforced mortar coating (110), the high-ductility repair mortar coating (120) and all other portions of the hydraulic concrete flow base surface (1); An inorganic water-based concrete sealing and curing agent coating (3) is brushed or sprayed on the thin layer of durable repair mortar coating (2).

3. The hydraulic concrete flow surface protection structure according to claim 2, characterized in that: The inorganic water-based concrete sealing and curing agent coating (3) is a lithium-based concrete sealing and curing agent.

4. The hydraulic concrete flow surface protection structure according to claim 2, characterized in that: The thickness of the entire hydraulic concrete flow surface protection structure is 450~1000μm.

Images