Anti-rust and anti-corrosion maritime work reinforced concrete structure

Abstract

The utility model provides a corrosion-resistant and corrosion-resistant marine reinforced concrete structure, which comprises a bare concrete layer, a corrosion-resistant concrete layer and a waterproof protective layer, the bare concrete layer is integrally formed by pouring, the corrosion-resistant concrete layer is a concrete part coated and permeated by a permeation-type steel bar corrosion inhibitor, and the waterproof protective layer is a waterproof protective layer. And the waterproof protection layer is a concrete part coated and permeated with isooctyl silane waterproof impregnating paste. The concrete structure comprises the fair-faced concrete layer, the corrosion-resistant concrete layer and the waterproof protection layer, and the corrosion-resistant concrete layer containing the permeation type steel bar corrosion inhibitor can protect and prevent the steel bars from rust; the waterproof protection layer of the isooctyl silane waterproof dipping paste can effectively prevent water, effectively reduce invasion of harmful substances in water vapor, increase the anti-rust and anti-corrosion capability, and protect reinforcing steel bars in the whole reinforced concrete from being corroded and damaged.

Description

Technical Field

[0001] The utility model relates to the field of building facilities, in particular to a rust and corrosion resistant type marine reinforced concrete structure. Background Technique

[0002] Concrete is made by mixing cement, sand, gravel, water as binding materials, and admixtures, additives, etc. in a certain proportion. After solidification, it is as hard as stone and has good compression resistance, but poor tensile resistance and is prone to fracture due to tension. To solve this contradiction and give full play to the compression capacity of concrete, a certain amount of steel bars are often added in the tensile area or corresponding parts of the concrete, so that the two materials are bonded into a whole to jointly bear external forces. This kind of concrete with steel bars is called reinforced concrete.

[0003] China is a major marine country. Developing marine resources and marine economy is an important strategic decision of China. Marine engineering construction is an important prerequisite and basic guarantee for comprehensive marine development. However, due to the particularity of the marine environment (strong radiation, high salinity, high humidity, etc.), it will cause phenomena such as corrosion and damage of metal materials, cracking and swelling of reinforced concrete structures, and deformation and deterioration of polymer materials. As an important material for marine engineering, concrete has high requirements for its durability. Conventional high-performance marine concrete has a certain effect on inhibiting the deterioration and failure of materials under marine environmental conditions, but it cannot fundamentally solve the corrosion of chloride salts and sulfates on concrete materials in the marine environment. The fundamental reason is that after ordinary cement hydration, it forms a multiphase material mainly composed of C-S-H gel and 3Ca(OH)2. Ions such as SO4, C1, and Mg2 are easy to react with crystalline phases such as calcium hydroxide and sulfoaluminate in the cement stone structure, causing volume change and loose structure of the concrete, shortening the service life of marine engineering, and causing serious economic losses and losses of life and property.

[0004] In recent years, with the expansion of the scale of national large-scale engineering construction and the deterioration of the natural conditions of the sea, the corrosion phenomenon of steel bars in marine concrete has become increasingly apparent, especially the damage to concrete structures such as bridge piers and bridge bodies, which has brought immeasurable losses to the national economy or the safety of people's lives and property. Preventing and controlling the corrosion of steel bars is the guarantee for ensuring the safety of concrete structures. There are always pores in the reinforced concrete layer structure, which causes moisture in the air to gradually penetrate to the position of the steel bars in the concrete structure, resulting in the rusting of the steel bars and the loss of the overall safety of the concrete structure.

[0005] The existing solutions are as follows:

[0006] 1. High-strength grouting material is poured to increase the thickness of the protective layer. The disadvantage is that the original beam body needs to be roughened, which will cause secondary damage to the existing beam body, and the pouring thickness is about 1-2 cm, and cracks are easy to occur after large-area pouring.

[0007] 2. Rubber King emulsion + cement + sand, increasing the thickness of the protective layer. The disadvantage is that the surface of the original beam body needs to be roughened, which is likely to cause damage to the beam body; the repair thickness is 1 - 2 cm and needs to be constructed in layers; support needs to be done during one-time forming to prevent falling; it needs to be cured for 28 days, with a long construction period and a waste of time. Summary of the Utility Model

[0008] The utility model provides a rust - inhibiting and anti - corrosion type marine reinforced concrete structure, which can carry out rust - proof and waterproof treatments on the surface of the reinforced concrete to ensure the service life of the internal steel bars.

[0009] The technical solution of the utility model is realized as follows: A rust - inhibiting and anti - corrosion type marine reinforced concrete structure includes a fair - faced concrete layer, a rust - inhibiting concrete layer and a waterproof protective layer. The fair - faced concrete layer is integrally cast. The rust - inhibiting concrete layer is the part of the concrete that is coated and penetrated with a penetrating type steel bar rust inhibitor. The waterproof protective layer is the part of the concrete that is coated and penetrated with isooctyl silane waterproof impregnating paste, and the penetration depth of the rust - inhibiting concrete layer is greater than that of the waterproof protective layer.

[0010] Preferably, the rust - inhibiting concrete layer is only penetrated with a penetrating type steel bar rust inhibitor, and the concrete of the waterproof protective layer contains isooctyl silane waterproof impregnating paste.

[0011] Preferably, for the penetrating type steel bar rust inhibitor in the rust - inhibiting concrete layer, its penetration depth from the concrete surface is greater than 25 mm and wraps the steel bars in this layer.

[0012] Preferably, the isooctyl silane waterproof impregnating paste of the waterproof protective layer is applied in two coats, and its penetration depth from the concrete surface is greater than 10 mm.

[0013] Preferably, the penetration depth of the penetrating type steel bar rust inhibitor is 30 - 40 mm.

[0014] Preferably, the penetration depth of the isooctyl silane waterproof impregnating paste is 10 - 20 mm.

[0015] Preferably, in the rust - inhibiting concrete layer, the penetrating type steel bar rust inhibitor forms a protective film on the surface of the steel bars.

[0016] Compared with the prior art, the advantages of the utility model are as follows: The concrete structure includes a fair - faced concrete layer, a rust - inhibiting concrete layer and a waterproof protective layer. The rust - inhibiting concrete layer containing the penetrating type steel bar rust inhibitor can protect the steel bars from rust; the waterproof protective layer of the isooctyl silane waterproof impregnating paste can effectively prevent water, effectively reduce the intrusion of harmful substances in water vapor, increase the rust - inhibiting and anti - corrosion ability, and protect the steel bars in the entire reinforced concrete from being corroded and damaged. Brief Description of the Drawings

[0017] Figure 1 Schematic side sectional view of an embodiment of the present utility model;

[0018] Figure 2 Schematic side sectional view of another embodiment of the present utility model.

[0019] In the figure: 1, fair-faced concrete layer; 2, rust-inhibiting concrete layer; 3, waterproof protective layer; 4, steel bars; 5, protective film. Specific implementation manners

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0023] A rust-inhibiting and anti-corrosion type marine reinforced concrete structure includes a fair-faced concrete layer 1, a rust-inhibiting concrete layer 2 and a waterproof protective layer 3. The fair-faced concrete layer 1 is integrally cast. The rust-inhibiting concrete layer 2 is the concrete part coated with and penetrated by a penetrating steel bar rust inhibitor. The waterproof protective layer 3 is the concrete part coated with and penetrated by isooctyl silane waterproof impregnating paste, and the penetration depth of the rust-inhibiting concrete layer 2 is greater than the depth of the waterproof protective layer 3.

[0024] The rust-inhibiting concrete layer 2 is only penetrated with a penetrating type steel bar rust inhibitor, and the concrete of the waterproof protective layer 3 contains isooctyl silane waterproof impregnating paste. In the rust-inhibiting concrete layer 2, a protective film 5 is formed by covering the penetrating type steel bar rust inhibitor on the surface of the steel bar 4.

[0025] The penetrating type steel bar rust inhibitor in the rust-inhibiting concrete layer 2 has a penetration depth greater than 25 mm from the concrete surface and forms a protective film to wrap the steel bar 4 in this layer. The rust inhibitor is not attached to the concrete surface, but penetrates into the concrete base layer in the forms of solid state, liquid state and ionic state for 25 - 40 mm, reaching the position of the steel bar 4, and forms a complete and effective protective film 5 around the steel bar 4.

[0026] The isooctyl silane waterproof impregnating paste of the waterproof protective layer 3 is applied in two coats, and its penetration depth is greater than 10 mm from the concrete surface, with a depth of about 10 - 20 mm.

[0027] Example 1, see Figure 1 , a rust-inhibiting and anti-corrosion type marine reinforced concrete structure, used for the bridge deck beam environment at sea.

[0028] Step 1, surface treatment of the base: Use a angle grinder or wire brush to polish the concrete surface and clean the dust and debris.

[0029] Step 2, rust inhibition spraying for the steel bar 4: Spray the penetrating type steel bar rust inhibitor on the concrete surface three times, (select -903+), use equipment such as a roller, sprayer, airless sprayer, etc. to evenly spray the rust inhibitor material on the concrete surface, wait for three hours, and check the surface; it can be constructed for the next layer when it is in a dry state, and at least two layers need to be constructed; rain protection measures must be taken within four hours after construction, and the rust inhibitor material cannot be mixed with water. Finally, it penetrates into the concrete to form the rust-inhibiting concrete layer 2, and the non-penetrated concrete part is the fair-faced concrete layer 1. -903+ has a recognizable pink color, and the color gradually fades to colorless after construction. The penetrating type steel bar rust inhibitor penetrates into the concrete base layer in the forms of solid state, liquid state and ionic state for 25 - 40 mm, reaches the position of the steel bar 4, and forms a complete and effective protective film 5 around the steel bar 4;

[0030] Step 3, silane waterproof coating: The waterproof protective layer 3 uses isooctyl silane waterproof impregnating paste, ( -706Thixo), this isooctyl silane waterproof impregnating paste is a milky white paste, and it gradually becomes colorless after being applied; one day after the completion of the previous process, use a roller to evenly apply the isooctyl silane waterproof impregnating paste, and construct it twice on the concrete surface in total, with an interval of at least five hours between the two times, penetrate into the concrete for 10 - 20 mm, and finally form a perfect waterproof protective layer 3; rain protection measures must be taken for the waterproof protective layer 3 within three hours after construction.

[0031] The rust inhibitor is combined with silane waterproofing, effectively reducing the intrusion of harmful substances in water vapor, increasing the anti-rust and anti-corrosion ability, protecting the steel bars 4, extending the service life by three times, not forming a film, and not affecting the breathability of the concrete; it can be sprayed or roller-coated, with convenient construction, and significantly improving the freeze-thaw resistance of the concrete.

[0032] Example 2, see Figure 2 , a rust-inhibiting and anti-corrosion type marine reinforced concrete structure, used in the pier environment at sea, including a fair-faced concrete layer 1 containing steel bars 4, a rust-inhibiting concrete layer 2 with rust-inhibiting performance, and an outermost waterproof protective layer 3; the rust-inhibiting concrete layer 2 is the part of the concrete coated and penetrated with a penetrating type steel bar rust inhibitor, and the steel bars 4 in this part come into contact with the penetrating type steel bar rust inhibitor to form a protective film 5, and the waterproof protective layer 3 is the part of the concrete coated with isooctyl silane waterproof impregnating paste.

[0033] Step 1, base surface treatment: Use a angle grinder or wire brush to polish the concrete surface, and clean the dust and debris.

[0034] Step 2, rust inhibition spraying for steel bars 4: Spray the penetrating type steel bar rust inhibitor on the concrete surface three times, (select -903+), use equipment such as rollers, sprayers, and airless sprayers to evenly spray the rust inhibitor material on the concrete surface, wait for three hours, and check the surface; if it is in a dry state, the next layer can be constructed, and for high-strength beam bodies, three layers need to be constructed; rain protection measures must be taken within four hours after construction, and the rust inhibitor material cannot be mixed with water. Finally, it penetrates into the concrete by 25 - 40 mm to form the rust-inhibiting concrete layer 2.

[0035] Step 3, silane waterproof coating: The waterproof protective layer 3 uses isooctyl silane waterproof impregnating paste, ( -706Thixo), which is a milky white paste and gradually turns colorless after coating; one day after the completion of the previous process, use a roller to evenly coat the isooctyl silane waterproof impregnating paste, and construct two layers in total on the surface of the concrete layer, with an interval time of at least five hours between layers, penetrate into the concrete by 10 - 20 mm, and finally form the waterproof protective layer 3; rain protection measures must be taken for the waterproof protective layer 3 within three hours after construction.

[0036] The rust inhibitor is combined with silane waterproofing, effectively reducing the intrusion of harmful substances in water vapor, increasing the anti-rust and anti-corrosion ability, protecting the steel bars 4, extending the service life by three times, not forming a film on the concrete surface, and not affecting the breathability of the concrete; it can be sprayed or roller-coated, with convenient construction, and significantly improving the freeze-thaw resistance of the concrete.

[0037] The rust inhibitor + silane waterproofing enhances the anti-rust and anti-corrosion capabilities of the concrete structure. The recommended solution is to perform non-destructive repair, increase the anti-rust and anti-corrosion capabilities of the reinforced concrete structure, protect the concrete beam body from the damage of harmful substances in the marine environment, and extend the service life. The above two materials infiltrating into the concrete base do not change the diffusivity of water vapor in the concrete; the outermost waterproof protective layer 3 reduces the water absorption and simultaneously reduces the absorption of oxygen and other harmful substances such as corrosive substances dissolved in water.

[0038] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A rust-proof and anti-corrosion marine reinforced concrete structure, characterized in that: It includes a plain concrete layer, a rust-proof concrete layer and a waterproof protective layer. The plain concrete layer is cast in one piece. The rust-proof concrete layer is a concrete part coated with and infiltrated with a penetrating steel bar rust inhibitor. The waterproof protective layer is a concrete part coated with and infiltrated with isooctylsilane waterproof impregnation paste.

2. The rust-proof and corrosion-resistant marine reinforced concrete structure according to claim 1 is characterized in that: The rust-proof concrete layer is only permeated with a penetrating steel bar rust inhibitor, and the concrete of the waterproof protective layer contains isooctylsilane waterproof impregnation paste.

3. The rust-proof and corrosion-resistant marine reinforced concrete structure according to claim 2 is characterized in that: The penetration-type steel bar rust inhibitor in the rust-proof concrete layer has a penetration depth greater than 25 mm from the concrete surface and wraps the steel bars in the layer.

4. The rust-proof and corrosion-resistant marine reinforced concrete structure according to claim 3 is characterized in that: The isooctylsilane waterproof impregnation paste of the waterproof protective layer is applied in two layers, and its penetration depth is greater than 10 mm from the concrete surface.

5. The rust-proof and anti-corrosion marine reinforced concrete structure according to claim 4 is characterized in that: The penetration depth of the penetrating steel bar rust inhibitor is 30-40 mm.

6. The rust-proof and anti-corrosion marine reinforced concrete structure according to claim 5 is characterized in that: The penetration depth of the isooctylsilane waterproof impregnation paste is 10-20 mm.

7. The rust-resistant and anti-corrosion marine reinforced concrete structure according to any one of claims 1 to 6, characterized in that: In the rust-proof concrete layer, the penetrating steel bar rust inhibitor covers the steel bar surface to form a protective film.

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