Anticorrosive and rust-proof water-proof type anti-cracking agent, preparation method and application thereof

Abstract

The application discloses an anti-corrosion and rust-proof water-proof type anti-cracking agent and a preparation method and application thereof, and belongs to the technical field of concrete admixtures. Raw materials of the anti-cracking agent include the following components in percentage by mass: an anti-corrosion and rust-proof component 5-10%, a water-proof self-healing component 15-20%, an expansion component 50-60%, and a dense component 10-30%; the anti-corrosion and rust-proof component includes (10-20):(80-90) of tetrabutylammonium decatungstate and a cathode type rust inhibitor, and the cathode type rust inhibitor includes at least one of zinc phosphate, zinc acetate and calcium zincate. The specific anti-corrosion and rust-proof component tetrabutylammonium decatungstate, zinc phosphate and calcium zincate of the application has excellent anti-corrosion and rust-proof effect; in addition, the anti-corrosion and rust-proof component used in the application can activate the water-proof self-healing component and has a promoting effect on the water-proof self-healing component while improving the anti-corrosion and rust-proof performance, and can significantly improve the secondary impermeability of concrete in cooperation with the water-proof self-healing component.

Description

Technical Field

[0001] This invention belongs to the field of concrete admixture technology, specifically relating to a corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent, its preparation method, and its application. Background Technology

[0002] Currently, reinforced concrete is widely used in structures such as bridges, buildings, dams, undersea tunnels, and large offshore platforms. However, poor durability due to steel corrosion poses a serious threat to the normal use of reinforced concrete structures, becoming a global issue of widespread concern in the concrete industry and the entire engineering community. To address this, a series of corrosion protection measures have been researched and developed, including coating and sealing methods, electrochemical desalination, and steel corrosion inhibitors. However, coating or sealing methods present significant construction difficulties; electrochemical methods are technically challenging, time-consuming, and costly; steel corrosion inhibitors, with their economic efficiency, practicality, and ease of application, have gained significant attention within the reinforced concrete industry.

[0003] Corrosion inhibitors can be classified into anodic, cathodic, and hybrid types based on the location of corrosion. Anodic corrosion inhibitors cause metal ions to react in the anodic region, forming an oxide or hydroxide passivation film that covers the anode, forming a protective film and inhibiting metal dissolution in water; the anode is thus passivated. Commonly used anodic corrosion inhibitors include chromates and nitrites; however, these materials are carcinogenic to humans and harmful to the environment, and are now rarely used as corrosion inhibitors. Cathodic corrosion inhibitors are safe to use, but their effectiveness is weaker than that of anodic inhibitors.

[0004] On the other hand, concrete often suffers from cracking and water seepage due to its inherent material properties and external loads. These cracking and seepage further exacerbate the corrosion of the reinforcing steel within the concrete, affecting the waterproofing and durability of the concrete structure. Therefore, a concrete admixture is still needed to comprehensively address the problems of steel corrosion, cracking, and water seepage within concrete, in order to improve the crack resistance and durability of concrete.

[0005] In the prior art, CN113307536A discloses a corrosion-resistant, rust-inhibiting, crack-resistant, and waterproofing agent. This agent comprises 25-35% corrosion-resistant and rust-inhibiting components, 35-55% expansion components, and 20-30% waterproofing and seepage-resistant components. The corrosion-resistant and rust-inhibiting components, by mass percentage, include both corrosion-resistant and rust-inhibiting components. The corrosion-resistant component is any one or more of ultrafine mineral powder, ultrafine fly ash, and ultrafine silica fume, while the rust-inhibiting component includes any one or more of sodium hexametaphosphate, triisopropanolamine, sodium carbonate, and anhydrous sodium metasilicate. This invention, based on the self-waterproofing of concrete structures by compensating for shrinkage through expansion and improving waterproofing and seepage resistance, incorporates a corrosion-resistant and rust-inhibiting admixture to improve the waterproofing and seepage resistance of concrete, reduce the corrosive effect of harmful environmental ions on concrete structures, and achieves a balance of corrosion resistance, waterproofing, seepage resistance, and crack resistance, thus improving engineering application results. However, its corrosion resistance, rust inhibition, and waterproofing effects are relatively limited, and it cannot effectively solve the problems of water seepage in concrete and corrosion of internal steel reinforcement. Summary of the Invention

[0006] In view of the shortcomings of the prior art, one of the objectives of this invention is to provide a corrosion-resistant, rust-inhibiting, and waterproof crack-resistant agent. The crack-resistant agent of this invention has the functions of corrosion prevention, rust inhibition, waterproofing, shrinkage compensation, and densification, which can effectively solve the problems of water seepage and cracking in concrete and the corrosion of steel bars inside concrete.

[0007] To achieve the above objectives, the specific technical solution of the present invention is as follows:

[0008] A corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent, the raw materials of which include the following components in the indicated weight percentages: 5%–10% corrosion-resistant and rust-inhibiting component, 15%–20% waterproof and self-healing component, 50%–60% expansion component, and 10%–30% compacting component;

[0009] The corrosion-resistant and rust-inhibiting component comprises tetrabutylammonium decatungstate and a cathodic rust inhibitor in a mass ratio of (10-20):(80-90), wherein the cathodic rust inhibitor comprises at least one of zinc phosphate, zinc acetate and calcium zincate.

[0010] Preferably, the anti-corrosion and rust-inhibiting components include tetrabutylammonium decatungstate, zinc phosphate, and calcium zincate in a mass ratio of (10-20):(40-60):(30-40).

[0011] More preferably, the anti-corrosion and rust-inhibiting components include tetrabutylammonium decatungstate, zinc phosphate, and calcium zincate in a mass ratio of 15:50:35.

[0012] Preferably, the waterproof and self-healing component comprises silicate, potassium aluminum sulfate dodecahydrate, and tetrasodium EDTA. More preferably, the silicate comprises at least one of sodium silicate, lithium silicate, and potassium silicate.

[0013] Preferably, the raw materials of the anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent include the following components in the following mass percentages: anti-corrosion and rust-inhibiting component 8%, waterproof and self-healing component 17%, expansion component 55%, and compacting component 20%.

[0014] Preferably, the expanded component includes one or more of lightly calcined magnesium oxide clinker and calcium expanded clinker.

[0015] Preferably, the dense component includes one or more of fly ash, mineral powder, silica fume, and anhydrite.

[0016] Preferably, the raw materials of the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent include the following components in the following mass percentages: tetrabutylammonium decatungstate 1.2%, zinc phosphate 4%, calcium zincate 2.8%, sodium silicate 10%, potassium aluminum sulfate dodecahydrate 4%, tetrasodium EDTA 3%, lightly calcined magnesia clinker 40%, calcareous expanded clinker 15%, fly ash 10%, mineral powder 6%, and silica fume 4%.

[0017] Another object of the present invention is to provide a method for preparing the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent, comprising the following steps: adding the corrosion-resistant and rust-inhibiting components, the waterproof and self-healing components, the expansion components, and the compacting components into a dry mixing machine and mixing them until homogeneous.

[0018] Another object of the present invention is to provide the application of the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent in concrete, wherein the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent is incorporated into the concrete together with the cementitious material and accounts for 6% to 12% of the mass of the cementitious material by means of internal admixture.

[0019] Compared with the prior art, the advantages of the present invention are:

[0020] (1) The anti-corrosion and rust-inhibiting components in the crack-resistant agent of the present invention are used in combination with the anodic component tetrabutylammonium decatungstate and specific cathodic components zinc phosphate, zinc acetate and calcium zincate. It has excellent anti-corrosion and rust-inhibiting effects and can form a dense passivation film on the surface of the steel bar. The passivation film has a high bonding strength with the surface of the steel bar and can effectively inhibit the electrochemical reaction that causes steel bar corrosion for a long time, prevent chloride ions from penetrating, avoid the corrosion of steel bars by harmful ions in reinforced concrete, and thus extend the service life of reinforced concrete.

[0021] (2) The specific anti-corrosion and rust-inhibiting components of the present invention, namely tetrabutylammonium decatungstate, zinc phosphate, and calcium zincate, can activate the waterproof self-healing components while improving the anti-corrosion and rust-inhibiting performance. They have a promoting effect on the waterproof self-healing components of the present invention and can synergistically improve the waterproof performance of the waterproof self-healing components, thereby significantly improving the secondary impermeability of concrete.

[0022] (3) The crack-resistant agent of the present invention, under the synergistic effect of a specific combination of anti-corrosion and rust-inhibiting components, waterproof and self-healing components, expansion components and densifying components, greatly improves the anti-seepage and crack-resistant performance and anti-corrosion and rust-inhibiting performance of concrete, effectively improves the anti-seepage and crack-resistant effect of concrete, and at the same time effectively avoids the corrosion of steel bars by corrosive ions, comprehensively solves the problems of steel bar corrosion and cracking and water seepage inside concrete, and improves the crack resistance and durability of concrete. Detailed Implementation

[0023] The technical solution of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] The corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent of the present invention comprises the following components in weight percentage: 5% to 10% corrosion-resistant and rust-inhibiting component, 15% to 20% waterproof and self-healing component, 50% to 60% expansion component, and 10% to 30% compacting component.

[0025] The corrosion-resistant and rust-inhibiting components include tetrabutylammonium decatungstate and a cathodic rust inhibitor in a mass ratio of (10-20):(80-90). The cathodic rust inhibitor can be at least one of zinc phosphate, zinc acetate, and calcium zincate. The waterproof and self-healing components include silicates, potassium aluminum sulfate dodecahydrate, and tetrasodium EDTA. The expansion component can be selected from one or more of lightly calcined magnesia clinker and calcareous expanded clinker. The compacting component can be selected from one or more of fly ash, mineral powder, silica fume, and anhydrite.

[0026] Unless otherwise specified, the anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agents provided in the following examples and comparative examples are all prepared according to the following method: the anti-corrosion and rust-inhibiting components, the waterproof and self-healing components, the expansion components, and the compacting components are added to a dry mixer and stirred until homogeneous.

[0027] Example 1

[0028] The raw materials of the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent in this embodiment include the following components by mass percentage:

[0029] Tetrabutylammonium decatungstate (TBADT) 1.2%, zinc phosphate 4%, calcium zincate 2.8%;

[0030] Sodium silicate 10%, potassium aluminum sulfate dodecahydrate 4%, tetrasodium EDTA 3%;

[0031] Lightly calcined magnesium oxide clinker: 40%; Calcium expanded clinker: 15%;

[0032] 10% fly ash, 6% mineral powder, and 4% silica fume.

[0033] Example 2

[0034] The raw materials of the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent in this embodiment include the following components by mass percentage:

[0035] Tetrabutylammonium decatungstate (TBADT) 0.5%, zinc phosphate 3%, calcium zincate 1.5%;

[0036] Sodium silicate 10%, potassium aluminum sulfate dodecahydrate 4%, tetrasodium EDTA 3%;

[0037] Lightly calcined magnesium oxide clinker: 40%; Calcium expanded clinker: 15%;

[0038] Fly ash 13%, mineral powder 6%, silica fume 4%.

[0039] Example 3

[0040] The raw materials of the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent in this embodiment include the following components by mass percentage:

[0041] Tetrabutylammonium decatungstate (TBADT) 2%, zinc phosphate 4%, calcium zincate 4%;

[0042] Sodium silicate 10%, potassium aluminum sulfate dodecahydrate 4%, tetrasodium EDTA 3%;

[0043] Lightly calcined magnesium oxide clinker: 40%; Calcium expanded clinker: 15%;

[0044] Fly ash 8%, mineral powder 6%, silica fume 4%.

[0045] Example 4

[0046] The raw materials of the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent in this embodiment include the following components by mass percentage:

[0047] Tetrabutylammonium decatungstate (TBADT) 1.2%, zinc acetate 4%, calcium zincate 2.8%;

[0048] Lithium silicate 10%, potassium aluminum sulfate dodecahydrate 3%, tetrasodium EDTA 2%;

[0049] 50% lightly calcined magnesium oxide clinker;

[0050] Fly ash 17%, anhydrite 10%.

[0051] Example 5

[0052] The raw materials of the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent in this embodiment include the following components by mass percentage:

[0053] Tetrabutylammonium decatungstate (TBADT) 1.2%, zinc phosphate 6.8%;

[0054] Sodium silicate 10%, potassium aluminum sulfate dodecahydrate 4%, tetrasodium EDTA 3%;

[0055] Lightly calcined magnesium oxide clinker: 40%; Calcium expanded clinker: 15%;

[0056] 10% fly ash, 6% mineral powder, and 4% silica fume.

[0057] Comparative Example 1

[0058] The raw materials of the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent in this comparative example include the following components by mass percentage:

[0059] Ammonium heptamolybdate 1.2%, zinc phosphate 4%, calcium zincate 2.8%;

[0060] Sodium silicate 10%, potassium aluminum sulfate dodecahydrate 4%, tetrasodium EDTA 3%;

[0061] Lightly calcined magnesium oxide clinker: 40%; Calcium expanded clinker: 15%;

[0062] 10% fly ash, 6% mineral powder, and 4% silica fume.

[0063] Similar to Example 1, this comparative example replaces tetrabutylammonium decatungstate with ammonium heptamolybdate.

[0064] Comparative Example 2

[0065] The corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent in this comparative example comprises the following components by mass percentage:

[0066] Tetrabutylammonium decatungstate (TBADT) 1.2%, sodium hexametaphosphate 6.8%;

[0067] Sodium silicate 10%, potassium aluminum sulfate dodecahydrate 4%, and tetrasodium EDTA 3%;

[0068] Lightly calcined magnesium oxide clinker: 40%; Calcium expanded clinker: 15%;

[0069] 10% fly ash, 6% mineral powder, and 4% silica fume.

[0070] It is basically the same as Example 1, except that the cathode type rust inhibitor is completely replaced with sodium hexametaphosphate.

[0071] Test case

[0072] The corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agents of Examples 1-5 and Comparative Examples 1-2 were incorporated into mortar. The mortar's restricted expansion rate and corrosion resistance coefficient were tested, as well as its rust-preventive performance in a salt solution. The restricted expansion rate of the mortar was tested according to the standard "Magnesium Oxide Expansive Agent for Concrete" (CBMF 19-2017), with a specimen curing temperature of 40℃. The test mix proportions are shown in Table 1. The corrosion resistance coefficient was tested according to the standard "Anti-corrosion and Corrosion Inhibitor for Concrete" (JC / T 1011-2021), with the test mix proportions shown in Table 2. The rust-preventive performance in a salt solution was tested according to the "Technical Specification for Application of Rust Inhibitors for Reinforcing Steel" (JGJ / T192-2009). The test results for the mortar's restricted expansion rate, corrosion resistance coefficient, and rust-preventive performance in a salt solution are shown in Table 3.

[0073] Table 1. Mix proportions for mortar restricted expansion rate test (g)

[0074] Group benchmark cement Standard sand water Crack-resistant agent Blank group 675 1350 270 0 experimental group 607.5 1350 270 67.5

[0075] Table 2 Test mix proportion of mortar corrosion resistance coefficient / g

[0076] Group water benchmark cement medium sand Crack-resistant agent Blank group Water consumption with a flowability of 150±5mm 300 750 0 experimental group Water consumption with a flowability of 150±5mm 270 750 30

[0077] Table 3. Mortar's Restricted Expansion Rate and Corrosion Inhibition Performance

[0078]

[0079]

[0080] As shown in Table 3, regarding the corrosion resistance coefficient and rust prevention performance in salt water, compared with the blank group, the corrosion resistance coefficients of Examples 1-5 are all greater than 1.25, and there is no rust on the surface of the reinforcing steel, and the solution is clear. This indicates that the corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent of the present invention can effectively prevent corrosion and inhibit rust. By comparing Examples 1-4 and Example 5, it can be found that compared with zinc phosphate alone, the composite cathodic rust inhibitor composed of zinc phosphate or zinc acetate and calcium zincate has a better rust-inhibiting effect. Comparing Examples 1 and 2, it was found that when tetrabutylammonium decatungstate was replaced with ammonium heptamolybdate, or when the composite cathodic corrosion inhibitor was replaced with sodium hexametaphosphate, the corrosion resistance coefficient decreased significantly, and rust appeared on the surface of the reinforcing steel. This indicates that the tetrabutylammonium decatungstate of the present invention, when used in combination with specific cathodic components zinc phosphate, zinc acetate, and calcium zincate, has excellent anti-corrosion and rust-inhibiting effects. Under the synergistic effect of each component, the anti-corrosion and rust-inhibiting components of the present invention can form a dense passivation film on the surface of the reinforcing steel. This passivation film has high bonding strength with the surface of the reinforcing steel and can effectively prevent the penetration of harmful ions, significantly improving the anti-corrosion and rust-inhibiting ability of concrete for reinforcing steel. Regarding the mortar restricted expansion rate index, compared with the blank group, the mortar restricted expansion rate of Examples 1 to 5 at different ages all showed a significant increase, indicating that the anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent of the present invention can play a micro-expansion role, which can compensate for concrete shrinkage, thereby improving the crack resistance of concrete.

[0081] The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agents of Examples 1-5 and Comparative Examples 1-2 were incorporated into concrete, and the concrete test mixes are shown in Table 4.

[0082] Table 4 Concrete mix proportions / kg

[0083] Group P·O42.5 cement Mineral powder fly ash sand stone water Water reducing agent Crack-resistant agent Blank group 285 85 60 770 1015 165 5 0 experimental group 285 42 60 770 1015 165 5 43

[0084] The waterproof and self-healing properties of concrete were tested in accordance with the standard "Cement-based Penetrating Crystalline Waterproofing Materials" (GB 18445-2012); the crack resistance was tested by observing the cracking of a full-scale concrete model with a test size of 3m×3m×3m in an outdoor natural environment for 180 days. The test results of the concrete properties are shown in Table 5.

[0085] Table 5 Concrete Properties

[0086]

[0087]

[0088] Note: The initial cracking time is the time from when the concrete starts to crack after water is added.

[0089] As shown in Table 5, for the waterproof and self-healing performance index, the 28-day seepage pressure of the blank example was 0.4 MPa, and the second 28-day seepage pressure was 0.2 MPa. The seepage pressure ratio of Example 1 was 325%, and the second seepage pressure ratio was 350%, indicating that the anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent of Example 1 of this invention has excellent waterproof and self-healing properties. The second seepage pressure values ​​of Examples 1-4 were all greater than the seepage pressure value of the blank example (0.4 MPa), indicating that the seepage resistance achieved after the concrete damage cracks were self-repaired by the material of this invention exceeded the self-seepage resistance of the concrete in the blank example. By comparing Example 1, Comparative Examples 1 and 2, it can be found that when tetrabutylammonium decatungstate is replaced with ammonium heptamolybdate, or when the composite cathode-type rust inhibitor is replaced with sodium hexametaphosphate, the waterproof self-healing ability of concrete is significantly reduced. This indicates that the specific anti-corrosion and rust-inhibiting components of the present invention, tetrabutylammonium decatungstate, zinc phosphate, and calcium zincate, can not only improve the anti-corrosion and rust-inhibiting performance, but also activate the waterproof self-healing components, promote the waterproof self-healing components, and synergistically improve the waterproof performance of the waterproof self-healing components, thereby improving the secondary impermeability of concrete.

[0090] Regarding the crack resistance performance index, the crack area in Examples 1-4 is all less than 100 mm. 2 The initial cracking time was all after 50 days. Compared with the control group, the crack resistance performance was significantly improved. Therefore, the anti-corrosion, rust-inhibiting and waterproof crack-resistant agent of the present invention has a good crack resistance effect.

[0091] In summary, the crack-resistant agent of the present invention, through the synergistic effect of a specific combination of anti-corrosion and rust-inhibiting components, waterproof and self-healing components, expansion components and densifying components, significantly improves the seepage prevention and crack resistance and anti-corrosion and rust-inhibiting properties of concrete, effectively enhances the seepage prevention and crack resistance of concrete, and effectively prevents corrosive ions from corroding the steel bars, comprehensively solving the problems of steel bar corrosion and cracking and water seepage inside concrete, and improving the crack resistance and durability of concrete.

[0092] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant, rust-inhibiting, waterproof, and crack-resistant agent, characterized in that, Its raw materials include the following components in the following weight percentages: anti-corrosion and rust-inhibiting components 5% to 10%, waterproof and self-healing components 15% to 20%, expansion components 50% to 60%, and densifying components 10% to 30%; The corrosion-resistant and rust-inhibiting component comprises tetrabutylammonium decatungstate and a cathodic rust inhibitor in a mass ratio of (10-20):(80-90), wherein the cathodic rust inhibitor comprises at least one of zinc phosphate, zinc acetate and calcium zincate.

2. The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to claim 1, characterized in that, The corrosion-resistant and rust-inhibiting components include tetrabutylammonium decatungstate, zinc phosphate, and calcium zincate in a mass ratio of (10-20):(40-60):(30-40).

3. The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to claim 1, characterized in that, The corrosion-resistant and rust-inhibiting components include tetrabutylammonium decatungstate, zinc phosphate, and calcium zincate in a mass ratio of 15:50:

35.

4. The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to claim 1, characterized in that, The waterproof and self-healing components include silicate, potassium aluminum sulfate dodecahydrate, and tetrasodium EDTA.

5. The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to claim 1, characterized in that, Its raw materials include the following components by weight percentage: 8% corrosion and rust inhibitor, 17% waterproof and self-healing component, 55% expansion component, and 20% densifying component.

6. The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to claim 1, characterized in that, The expanded component includes one or more of lightly calcined magnesium oxide clinker and calcium-based expanded clinker.

7. The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to claim 1, characterized in that, The dense component includes one or more of fly ash, mineral powder, silica fume, and anhydrite.

8. The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to claim 1, characterized in that, Its raw materials include the following components in the following mass percentages: tetrabutylammonium decatungstate 1.2%, zinc phosphate 4%, calcium zincate 2.8%, sodium silicate 10%, potassium aluminum sulfate dodecahydrate 4%, tetrasodium EDTA 3%, lightly calcined magnesia clinker 40%, calcareous expanded clinker 15%, fly ash 10%, mineral powder 6%, and silica fume 4%.

9. The preparation method of the anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to any one of claims 1 to 8, characterized in that, Includes the following steps: The anti-corrosion and rust-inhibiting components, waterproof and self-healing components, expansion components and densifying components are added to a dry mixer and mixed evenly to obtain the final product.

10. The application of the anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent according to any one of claims 1 to 8 in concrete, characterized in that, The anti-corrosion, rust-inhibiting, waterproof, and crack-resistant agent is mixed into the concrete together with the cementitious material, and its dosage is 6% to 12% of the mass of the cementitious material.

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