Anti-erosion and corrosion-resistant and anti-leakage protection mortar for flood discharge structure

Abstract

This invention relates to erosion-resistant, corrosion-resistant, and leak-proof protective mortars for flood discharge structures, including erosion-resistant and corrosion-resistant epoxy mortars for protecting the metal structures of flood discharge structures and erosion-resistant and leak-proof water-based epoxy mortars for protecting the concrete structures of flood discharge structures. The polyether nonionic compound used acts as both an emulsifier and a surfactant. When added to epoxy resin, the two are miscible, forming an epoxy resin base liquid for the metal structure protective mortar. This epoxy resin base liquid can also be used as an intermediate product, further mixed with water-soluble epoxy resin to form a novel water-emulsion and water-soluble mixed epoxy solution, which is then used to produce a water-based epoxy resin base liquid for the concrete structure protective mortar. This method is beneficial for mass production and simplifies on-site batching. The protective mortar has excellent mechanical properties and impermeability, and is extremely convenient for construction in wet conditions. The primer used for metal structure protection has metal corrosion protection properties; the mortar used for concrete protection, especially for the repair of open-air flood discharge surfaces, exhibits good weather resistance and aging resistance.

Description

Technical Field

[0001] This invention relates to the field of protective materials for metal structures and concrete of flood discharge structures in hydropower projects, specifically to erosion-resistant, abrasion-resistant, corrosion-resistant, and leak-proof protective mortar for flood discharge structures. Background Technology

[0002] Under the influence of high-speed, high-sediment-laden water flows, the concrete or metal structures of hydropower project spillway structures suffer varying degrees of damage: the interaction of silt abrasion and cavitation creates surface defects, and in severe cases, the concrete protective layer and the metal base plate of the gate chamber can be worn through, endangering the safe operation of the hydropower project; the gates and embedded parts are in a working environment of alternating wet and dry conditions and are subjected to the scouring of saline-alkaline water flows, accelerating corrosion; the vibration of high-speed water flows accelerates the propagation of micro-cracks in the concrete, requiring sealing treatment for minor leaks. Long-term comparative tests and engineering practice have shown that epoxy resin mortar is a cost-effective protective material, and therefore it is widely used in high-speed, turbid water anti-erosion and abrasion protection projects.

[0003] The epoxy mortar in the impact and abrasion zone requires high mechanical properties and a compressive strength of over 80 MPa. Water-based epoxy resin mortar is rarely used due to its generally poor mechanical properties. Currently, the mainstream impact and abrasion mortar on the market is oil-based epoxy mortar. However, the following problems are common in construction: (1) Adhesion problem at the damp interface: The flood discharge tunnel has high humidity, which easily forms water droplets on the wall. In addition, slight penetration of local concrete also causes the base surface to be damp, which reduces the adhesion performance of the oil-based epoxy primer. In order to keep the base surface dry, on-site construction is time-consuming and labor-intensive; (2) Adhesion problem at the interface between new and old concrete: The thermal expansion coefficients of concrete and epoxy mortar are different. Although the oil-based epoxy mortar itself has excellent mechanical properties, for the open flow surface of the flood discharge building, the temperature difference and aging problem greatly reduce the adhesion performance of the material, and the protective effect is not ideal.

[0004] Another issue with protecting metal structures is that for metal embedded parts that are submerged underwater for extended periods, water molecules can penetrate the mortar layer and corrode the metal surface, leading to rust and mortar peeling. However, the metal structures in flood discharge structures, such as metal gates and embedded parts, have a relatively small area compared to concrete structures, and there is generally a lack of specialized material design. Alternatively, the mortar used for concrete protection may be used to repair the metal structure during construction, resulting in poor interfacial corrosion resistance. Or, the mortar used for metal protection may not be the same type of epoxy and hardener used for concrete protection, leading to an excessive number of material containers on site, cumbersome construction, and hindering the use of mass-produced materials. Summary of the Invention

[0005] To address the aforementioned problems, the present invention aims to provide an anti-erosion and corrosion-resistant epoxy mortar for the protection of metal structures in flood discharge buildings, an anti-erosion and water-proof epoxy mortar for the protection of concrete structures in flood discharge buildings, and methods for preparing the above two mortars. The invention also provides a more targeted design for anti-erosion mortars with higher performance, which will more effectively protect concrete and metal structures in terms of corrosion resistance and impermeability.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0007] An impact-resistant, abrasion-resistant, and corrosion-resistant epoxy mortar for the protection of metal structures in flood discharge buildings, comprising, by weight, the following raw materials:

[0008]

[0009] The epoxy resin base liquid, by weight, comprises 4 to 6 parts of polyether nonionic compound and 94 to 96 parts of epoxy resin.

[0010] Furthermore, the polyether nonionic compound is NP8836, and the epoxy resin is epoxy resin E51.

[0011] Furthermore, the curing agent is an aliphatic amine curing agent, specifically one of diethylenetriamine or triethylenetetramine;

[0012] Furthermore, the curing accelerator is DMP-30;

[0013] Furthermore, the reactive diluent is at least one of AGE and BGE;

[0014] Furthermore, the coupling agent is KH550 or KH560;

[0015] Furthermore, the rust-preventive pigment is at least one of zinc phosphate and aluminum phosphate, and the addition of the rust-preventive pigment is used to improve the corrosion resistance of the metal surface.

[0016] Furthermore, the filler is corundum, with a Mohs hardness greater than 8, which is higher than the hardness of mud and sand in turbid water, in order to meet the requirements for impact and abrasion resistance. If the protective surface is not a part where components slide relative to each other during operation, the filler particle size is 30-60 mesh, and three-stage particles are used.

[0017] Furthermore, if the protective surface is a part where components slide relative to each other during operation, the filler particle size should be 150-250 mesh.

[0018] The adhesive is composed of epoxy resin base liquid, curing agent, curing accelerator, reactive diluent, and coupling agent.

[0019] The preparation method of the binder in the aforementioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures in flood discharge buildings specifically includes the following steps:

[0020] (1) Add polyether nonionic compound to epoxy resin, heat to 90-100℃, stir at medium speed until completely miscible, cool at room temperature to obtain epoxy resin base liquid, wherein the polyether nonionic compound acts as a surfactant.

[0021] (2) Add curing agent, curing accelerator, reactive diluent and coupling agent to the epoxy resin base liquid in step (1) and stir evenly to obtain adhesive.

[0022] The above-mentioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures of flood discharge buildings shall be used in the following manner: take 10% by weight of the binder as the primer and add anti-rust pigment to it; mix the remaining 90% by weight of the binder with the filler to make mortar.

[0023] An erosion-resistant and leak-proof water-based epoxy mortar for the protection of concrete structures in flood discharge buildings, comprising, by weight, the following raw materials:

[0024]

[0025] The waterborne epoxy resin base liquid is made from raw materials including polyether nonionic compound, epoxy resin and water-soluble epoxy resin. The weight ratio of the polyether nonionic compound to the epoxy resin is (4-6):(94-96). The proportion of raw material components is adjusted so that the water content of the final waterborne epoxy resin base liquid is 20-25%.

[0026] The above-mentioned water-based epoxy resin base liquid can also be obtained by the following method: take the epoxy resin base liquid from the above-mentioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures of flood discharge buildings, add water-soluble epoxy resin with a water content of 50%, and obtain water-based epoxy resin base liquid. Adjust the addition ratio so that the water content of the water-based epoxy resin base liquid is 20-25%.

[0027] Furthermore, the polyether nonionic compound is NP8836, the epoxy resin is epoxy resin E51, and the water-soluble epoxy resin is ZW-2851 with a water content of 50%.

[0028] Furthermore, the curing agent is an aliphatic amine curing agent, specifically one of diethylenetriamine or triethylenetetramine.

[0029] Furthermore, the curing accelerator is DMP-30;

[0030] Furthermore, the reactive diluent is at least one of AGE and BGE.

[0031] Furthermore, the coupling agent is KH550 or KH560;

[0032] Furthermore, the silicate cement is ordinary silicate 425 or 525 cement. The cement significantly reduces the light transmittance of the epoxy resin, preventing resin aging and improving its durability, providing good protection for outdoor working conditions.

[0033] Furthermore, the filler is corundum or a mixture of corundum and quartz sand, wherein the corundum has a Mohs hardness greater than 8, which is higher than the hardness of silt in turbid water, to meet the requirements for impact and abrasion resistance. The filler particle size is 30-60 mesh, using secondary particles. If the flood discharge surface is in an open environment, a mixture of corundum and quartz sand should be used, with corundum accounting for more than 60% of the mixture. Quartz sand and cement can reduce the difference in the coefficient of linear expansion between the mortar and the concrete protective substrate, resulting in better weather resistance of the mortar.

[0034] The adhesive is composed of water-based epoxy resin base liquid, silicate cement, curing agent, curing accelerator, reactive diluent, and coupling agent.

[0035] The preparation method of the binder in the aforementioned erosion-resistant and seepage-proof water-based epoxy mortar used for the protection of concrete structures in flood discharge buildings specifically includes the following steps:

[0036] (1) Add polyether nonionic compound to epoxy resin, heat to 90-100℃, stir until completely miscible, cool to room temperature to obtain epoxy resin base liquid;

[0037] (2) Slowly inject the epoxy resin base liquid from step (1) into the water-soluble epoxy resin and stir. At this time, the polyether nonionic compound in the epoxy resin base liquid acts as an emulsifier to generate a new type of water-emulsion water-soluble mixed epoxy solution. The two have different ratios and different water contents. Taking into account both mechanical properties and cost, adjust the ratio of the two to make the water content of the new water-emulsion water-soluble mixed epoxy solution 20%-25%, which is the water-based epoxy resin base liquid required for concrete protective mortar.

[0038] (3) Add curing agent, curing accelerator, reactive diluent, coupling agent and silicate cement to the water-based epoxy resin base liquid in step (2) and stir evenly to obtain adhesive.

[0039] The above-mentioned erosion-resistant and seepage-proof epoxy mortar used for the protection of concrete structures in flood discharge buildings shall be applied in the following manner: 10% by weight of the binder shall be used as the primer; the remaining 90% by weight of the binder shall be mixed with the filler to form the mortar.

[0040] The reason why the water-based epoxy mortar for flood discharge building concrete structure protection prepared using the water-based epoxy resin base liquid in this application has good mechanical properties and impermeability is as follows:

[0041] (1) The water content of water-soluble epoxy resin is 50%. Excessive water content has a great impact on the mechanical properties of mortar. By adjusting the ratio of water-emulsified epoxy and water-soluble epoxy, the water content is controlled to be below 25%. Taking into account the cost, the water content should be 20-25%, which is lower than that of conventional water-soluble epoxy resin, thus reducing the impact on the mechanical properties of mortar.

[0042] (2) Compared with water-emulsifiable epoxy, water-soluble epoxy particles are finer and more uniformly dispersed, and their performance is relatively better.

[0043] (3) Water-soluble epoxy resin has good flexibility and crack resistance, thus providing better impermeability. Water-soluble emulsion resin, on the other hand, exhibits rigidity and toughness, ensuring the compressive strength of the mortar.

[0044] (4) The emulsifier (i.e., polyether nonionic compound) and the active ingredients in the water-soluble epoxy used in this invention make the interfacial bonding strength higher.

[0045] Compared with the prior art, the present invention has the following beneficial effects:

[0046] (1) Polyether nonionic compounds are both emulsifiers and surfactants. When added to epoxy resin as surfactants, they can be used to make epoxy resin base liquid for protective mortar of flood discharge building metal structure. This can improve the construction performance of epoxy resin in water-bearing environment. It participates in the epoxy curing reaction and can toughen the epoxy crosslinking system. This epoxy resin base liquid can also be used as an intermediate product and mixed with water-soluble epoxy resin. The polyether nonionic compounds in it act as emulsifiers to form a new type of water-emulsion water-soluble mixed epoxy solution. This can be used to make water-based epoxy resin base liquid for protective mortar of flood discharge building concrete structure. This is beneficial for mass production and can also simplify on-site batching. The resulting protective mortar of flood discharge building concrete structure has good mechanical properties and impermeability.

[0047] (2) The compressive strength of the anti-abrasion and corrosion resistant epoxy mortar used for the protection of the metal structure of flood discharge building is greater than 100MPa, and the bonding strength on the wet surface is greater than 3MPa. It meets the requirements of anti-abrasion mechanical properties, is suitable for construction in water, and the primer has metal anti-corrosion properties. It is convenient to construct in a wet environment.

[0048] (3) The erosion-resistant and seepage-proof epoxy mortar used for the protection of concrete structures in flood discharge buildings has a compressive strength greater than 80MPa, a wet surface bonding strength greater than 3MPa and both are cohesive failures, and the impermeability grade reaches P20, which meets the mechanical performance requirements for erosion resistance and has a good seepage-proof sealing effect; it is extremely convenient to construct in water; the cement and quartz sand in the raw materials make the mortar more weather-resistant and durable, which makes it suitable for use in open-air erosion areas where protection is difficult, such as the spillway nose, stilling basin, downstream of the gate, etc. Detailed Implementation

[0049] To better understand the content of this invention, specific embodiments will be used to further illustrate the invention below. The following embodiments are based on the technology of this invention and provide detailed implementation methods and operating steps; however, the scope of protection of this invention is not limited to the following embodiments.

[0050] Example 1:

[0051] An impact-resistant and corrosion-resistant epoxy mortar for the protection of metal structures in flood discharge buildings, comprising the following components by weight:

[0052]

[0053] The epoxy resin base liquid, by weight, comprises 5 parts of polyether nonionic compound NP8836 and 95 parts of epoxy resin E51.

[0054] The filler is a mixture of 350 parts of 30-mesh brown fused alumina, 200 parts of 40-mesh brown fused alumina and 50 parts of 60-mesh brown fused alumina.

[0055] The adhesive is composed of epoxy resin base liquid, diethylenetriamine, DMP-30, AGE, BGE, and KH550.

[0056] The preparation method of the binder in the aforementioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures in flood discharge buildings specifically includes the following steps:

[0057] (1) Add polyether nonionic compound NP8836 to epoxy resin E51, heat to 100°C, stir until completely miscible, cool to room temperature to obtain epoxy resin base liquid.

[0058] (2) Add diethylenetriamine, DMP-30, AGE, BGE and KH550 to the epoxy resin base liquid in step (1), stir evenly to obtain the adhesive.

[0059] The above-mentioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures of flood discharge buildings shall be used in the following manner: take 10% by weight of the binder as the primer and add zinc phosphate and aluminum phosphate to it; mix the remaining 90% by weight of the binder with the filler.

[0060] The impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures in flood discharge buildings obtained in this embodiment was used to prepare test specimens according to the "Technical Specification for Epoxy Resin Mortar" (DL / T 5193-2004). The compressive strength was 110 MPa, and the wet surface bonding strength of the figure-eight mold specimen was 3 MPa, and it exhibited cohesive failure.

[0061] Example 2:

[0062] An impact-resistant and corrosion-resistant epoxy mortar for the protection of metal structures in flood discharge buildings, comprising the following components by weight:

[0063]

[0064] The epoxy resin base liquid, by weight, comprises 6 parts of polyether nonionic compound NP8836 and 94 parts of epoxy resin E51.

[0065] The water seal on the opposite side of the metal gate experiences sliding friction and wear, so 500 parts of 200-mesh brown corundum is selected as the filler.

[0066] The adhesive is composed of epoxy resin base liquid, diethylenetriamine, DMP-30, AGE, BGE, and KH550.

[0067] The preparation method of the binder in the aforementioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures in flood discharge buildings specifically includes the following steps:

[0068] (1) Add polyether nonionic compound NP8836 to epoxy resin E51, heat to 100°C, stir until completely miscible, cool to room temperature, and obtain epoxy resin base liquid.

[0069] (2) Add diethylenetriamine, DMP-30, AGE, BGE and KH550 to the epoxy resin base liquid in step (1), stir evenly to obtain the adhesive.

[0070] The above-mentioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures of flood discharge buildings shall be used in the following manner: take 10% by weight of the binder as the primer and add zinc phosphate and aluminum phosphate to it; mix the remaining 90% by weight of the binder with the filler.

[0071] The impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures in flood discharge buildings obtained in this embodiment was used to prepare test specimens according to the "Technical Specification for Epoxy Resin Mortar" (DL / T 5193-2004). The compressive strength was 108 MPa, and the wet surface bonding strength of the figure-eight mold specimen was 3.03 MPa, and it exhibited cohesive failure.

[0072] Example 3:

[0073] An erosion-resistant and waterproof epoxy mortar for the protection of concrete structures in flood discharge buildings, comprising the following components by weight:

[0074]

[0075] The waterborne epoxy resin base liquid, by weight, comprises 3 parts of polyether nonionic compound NP8836, 57 parts of epoxy resin E51, and 40 parts of water-soluble epoxy resin ZW-2851 with a water content of 50%, and the water content of the waterborne epoxy resin base liquid is 20%.

[0076] The aqueous epoxy resin base liquid used in this embodiment can also be obtained by the following method: the epoxy resin base liquid is obtained according to the formulation and preparation method of the epoxy resin base liquid in Example 1. Take 60 parts of the above epoxy resin base liquid and mix it with 40 parts of water-soluble epoxy ZW-2851 with a water content of 50% to obtain 100 parts of aqueous epoxy resin base liquid.

[0077] The filler is 300 parts of 30-mesh and 250 parts of 40-mesh brown fused alumina.

[0078] The adhesive is composed of water-based epoxy resin base liquid, ordinary silicate 525 cement, diethylenetriamine, DMP-30, AGE, and KH550.

[0079] The preparation method of the binder in the aforementioned erosion-resistant and seepage-proof epoxy mortar used for the protection of concrete structures in flood discharge buildings specifically includes the following steps:

[0080] (1) Add polyether nonionic compound NP8836 to epoxy resin E51, heat to 90°C, stir until completely miscible, cool to room temperature, and obtain epoxy resin base liquid.

[0081] (2) Slowly inject the epoxy resin base liquid from step (1) into water-soluble epoxy resin ZW-2851 with a water content of 50% and stir to obtain the water-based epoxy resin base liquid required for concrete protective mortar.

[0082] (3) Add diethylenetriamine, DMP-30, AGE, KH550 and ordinary silicate 525 cement to the water-based epoxy resin base liquid in step (2), stir evenly, and obtain the adhesive.

[0083] The above-mentioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of concrete structures in flood discharge buildings shall be applied in the following manner: 10% by weight of the binder shall be used as the primer; the remaining 90% by weight of the binder shall be mixed with the filler.

[0084] The impact-resistant and corrosion-resistant epoxy mortar used for the protection of concrete structures in flood discharge buildings obtained in this embodiment was used to prepare test specimens according to the "Technical Specification for Epoxy Resin Mortar" (DL / T 5193-2004). The compressive strength was 84 MPa, the wet surface bonding strength of the figure-eight mold specimen was 3.1 MPa, and it was cohesive failure. The impermeability grade was P20.

[0085] Example 4:

[0086] A water-based epoxy mortar for the protection, erosion resistance, and seepage prevention of concrete structures in flood discharge buildings, comprising the following components by weight:

[0087]

[0088] The aqueous epoxy resin base liquid, by weight, consists of 3 parts of polyether nonionic compound NP8836, 47 parts of epoxy resin E51, and 50 parts of water-soluble epoxy resin ZW-2851 with a water content of 50%, and the water content of the aqueous epoxy resin base liquid is 25%.

[0089] The aqueous epoxy resin base liquid used in this embodiment can also be obtained by the following method: the epoxy resin base liquid is obtained according to the formulation and preparation method of the epoxy resin base liquid in Example 2. Take 50 parts of the above epoxy resin base liquid and mix it with 50 parts of water-soluble epoxy resin ZW-2851 with a water content of 50% to obtain 100 parts of aqueous epoxy resin base liquid.

[0090] Since the flood discharge surface is in an open environment, a mixture of 300 parts of 30-mesh brown corundum and 200 parts of 40-mesh quartz sand was selected as the filler.

[0091] The adhesive is composed of water-based epoxy resin base liquid, ordinary silicate 525 cement, diethylenetriamine, DMP-30, AGE, and KH550.

[0092] The preparation method of the binder in the aforementioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of concrete structures in flood discharge buildings specifically includes the following steps:

[0093] (1) Add polyether nonionic compound NP8836 to epoxy resin E51, heat to 90°C, stir until completely miscible, cool to room temperature, and obtain epoxy resin base liquid.

[0094] (2) Slowly inject the epoxy resin base liquid from step (1) into water-soluble epoxy resin ZW-2851 with a water content of 50% and stir to obtain the water-based epoxy resin base liquid required for concrete protective mortar.

[0095] (3) Add diethylenetriamine, DMP-30, AGE, KH550 and ordinary silicate 525 cement to the water-based epoxy resin base liquid in step (2), stir evenly, and obtain the adhesive.

[0096] The aforementioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of concrete structures in flood discharge buildings is applied as follows: 10% by weight of the binder is used as a primer; the remaining 90% by weight of the binder is mixed with the filler. Due to the increased amount of cement and quartz sand, the mortar's coefficient of linear expansion is closer to that of the concrete substrate, resulting in better weather resistance and aging resistance, and better performance in outdoor applications.

[0097] The impact-resistant and corrosion-resistant epoxy mortar used for the protection of concrete structures in flood discharge buildings obtained in this embodiment was used to prepare test specimens according to the "Technical Specification for Epoxy Resin Mortar" (DL / T 5193-2004). The compressive strength was 81 MPa, the wet surface bonding strength of the figure-eight mold specimen was 3.07 MPa, and it was cohesive failure. The impermeability grade was P20.

[0098] The above description is merely an embodiment of the present invention and is not intended to limit the present invention in any way. The present invention can also have other embodiments based on the above structure and function, which will not be listed hereafter. Therefore, any simple modifications, equivalent changes, and alterations made by those skilled in the art to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. An erosion-resistant and waterproof epoxy mortar for the protection of concrete structures in flood discharge buildings, characterized in that: By weight, its raw materials include: 100 parts of water-based epoxy resin base liquid The water content of silicate cement waterborne epoxy resin base liquid is 2-3 times that of water. 10-15 parts of reactive diluent 8-10 parts of curing agent 1-3 parts of curing accelerator 1-3 parts of coupling agent 500-700 parts of filler The water-based epoxy resin base liquid has a water content of 20-25%, and its raw materials include polyether nonionic compounds, epoxy resin, and water-soluble epoxy resin. The aqueous epoxy resin base liquid is prepared by the following method: (1) Add a polyether nonionic compound to the epoxy resin, heat to 90~100℃, stir until completely miscible, cool to room temperature to obtain an epoxy resin base liquid, wherein the weight ratio of the polyether nonionic compound to the epoxy resin is (4~6):(94~96). (2) Slowly inject the epoxy resin base liquid from step (1) into the water-soluble epoxy resin and stir to obtain an aqueous epoxy resin base liquid with a water content of 20-25%.

2. The erosion-resistant and waterproof epoxy mortar for the protection of concrete structures in flood discharge buildings as described in claim 1, characterized in that: The polyether nonionic compound is NP8836, the epoxy resin is epoxy resin E51, and the water-soluble epoxy resin is ZW-2851 with a water content of 50%. The curing agent is one of diethylenetriamine and triethylenetetramine. The curing accelerator is DMP-30. The reactive diluent is at least one of AGE and BGE. The coupling agent is KH550 or KH560. The silicate cement is ordinary silicate 425 or 525 cement. The filler is corundum or a mixture of corundum and quartz sand, with corundum accounting for more than 60% of the mixture. The corundum has a Mohs hardness greater than 8. The filler particle size is 30-60 mesh, and secondary particles are used.

3. An impact-resistant, abrasion-resistant, and corrosion-resistant epoxy mortar for the protection of metal structures in flood discharge buildings, characterized in that, By weight, its raw materials include: 100 parts epoxy resin base liquid 11-12 parts of curing agent 0-3 parts of curing accelerator 10-20 parts of reactive diluent 1-3 parts of coupling agent Rust-preventive pigment 1.5 to 2 parts 500-700 parts of filler The epoxy resin base liquid, by weight, comprises 4-6 parts of polyether nonionic compound and 94-96 parts of epoxy resin. The adhesive is composed of epoxy resin base liquid, curing agent, curing accelerator, reactive diluent, and coupling agent. The preparation method of the binder in the aforementioned impact-resistant and corrosion-resistant epoxy mortar used for the protection of metal structures in flood discharge buildings specifically includes the following steps: (1) Add polyether nonionic compound to epoxy resin, heat to 90~100℃, stir at medium speed until completely miscible, cool at room temperature to obtain epoxy resin base liquid, wherein the polyether nonionic compound acts as a surfactant. (2) Add curing agent, curing accelerator, reactive diluent and coupling agent to the epoxy resin base liquid in step (1) and stir evenly to obtain adhesive.

4. The impact-resistant, abrasion-resistant, and corrosion-resistant epoxy mortar for the protection of metal structures in flood discharge buildings as described in claim 3, characterized in that: The polyether nonionic compound is NP8836, the epoxy resin is epoxy resin E51, the curing agent is one of diethylenetriamine and triethylenetetramine; the curing accelerator is DMP-30; the reactive diluent is at least one of AGE and BGE; the coupling agent is KH550 or KH560; the anti-rust pigment is at least one of zinc phosphate and aluminum phosphate; and the filler is corundum, wherein the corundum has a Mohs hardness greater than 8.

5. The impact-resistant, abrasion-resistant, and corrosion-resistant epoxy mortar for the protection of metal structures in flood discharge buildings as described in claim 3, characterized in that: The epoxy resin base liquid is prepared by the following method: adding a polyether nonionic compound to the epoxy resin, heating to 90~100℃, stirring until completely miscible, and cooling to room temperature to obtain the epoxy resin base liquid.

6. The impact-resistant, abrasion-resistant, and corrosion-resistant epoxy mortar for the protection of metal structures in flood discharge buildings as described in claim 3, characterized in that: The filler particle size is 30-60 mesh, and it uses three-stage particles.

7. The impact-resistant and corrosion-resistant epoxy mortar for protecting the metal structure of flood discharge buildings as described in claim 3, characterized in that: If the protective surface is a part where components slide relative to each other during operation, the filler particle size is 150-250 mesh.

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