Waterproof acid-resistant mortar for municipal pipeline repair

Abstract

The present application relates to the technical field of mortar, in particular to waterproof acid-resistant mortar for municipal pipeline repair; by weight of 1000 parts, it comprises the following raw materials by weight: cementing material 250-500 parts, admixture 20-60 parts, water reducing agent 1-5 parts, quartz powder 30-100 parts, latex powder 10-40 parts, hydrophobic agent 1-5 parts, fiber 1-5 parts, cellulose ether 0.1-1 part, magnesium additive 1-15 parts, early strength agent 0.1-0.8 part, defoaming agent 1-5 parts, thixotropic lubricant 2-8 parts, retarder 0.5-3 parts, and the rest is aggregate. The present application adopts two kinds of cementing materials of mixed material of aluminate cement and sulfate-resistant Portland cement, adds admixture, water reducing agent and hydrophobic additive of latex powder, matches with aggregate, adds magnesium additive such as magnesium oxide and magnesium hydroxide, which can react and consume weak acid in sewage, prevent weak acid from corroding calcium silicate crystals in mortar at the same time, form acid-resistant corrosion protection, can be used in plane and vertical repair in municipal sewage pipeline repair, and has good construction state and excellent performance.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mortar, in particular to a waterproof acid-resistant mortar for municipal pipeline repair. BACKGROUND

[0002] The pH value of municipal sewage pipeline city sewage is generally 6.5-7.5, and a slight decrease in pH value may be due to anaerobic fermentation in the municipal sewage pipeline. Ordinary Portland cement has poor acid resistance and is prone to corrosion, so the municipal sewage pipeline made of ordinary Portland cement often breaks and leaks due to corrosion during long-term use. Therefore, it is very important to develop a waterproof acid-resistant mortar for municipal pipeline repair to improve the service life of the municipal pipeline. SUMMARY

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present application is to provide a waterproof acid-resistant mortar for municipal pipeline repair.

[0004] The purpose of the present application is achieved by the following technical solutions:

[0005] A waterproof acid-resistant mortar for municipal pipeline repair, comprising the following raw materials in 1000 parts by weight:

[0006] Gelled material 250-500 parts, admixture 20-60 parts, water reducing agent 1-5 parts, quartz powder 30-100 parts, latex powder 10-40 parts, water repellent agent 1-5 parts, fiber 1-5 parts, cellulose ether 0.1-1 parts, magnesium additive 1-15 parts, early strength agent 0.1-0.8 parts, defoaming agent 1-5 parts, thixotropic lubricant 2-8 parts, retarder 0.5-3 parts, and the balance is aggregate. The aggregate and other raw materials are balanced to 100% according to the total amount of raw materials. The total amount of raw materials is calculated as 1 kg, and 1 part by weight is equivalent to 1 g.

[0007] Preferably, a waterproof acid-resistant mortar for municipal pipeline repair, comprising the following raw materials in 1000 parts by weight:

[0008] Gelled material 300-400 parts, admixture 30-50 parts, water reducing agent 1-2 parts, quartz powder 40-80 parts, latex powder 10-30 parts, water repellent agent 1-5 parts, fiber 2-4 parts, cellulose ether 0.1-0.5 parts, magnesium additive 5-10 parts, early strength agent 0.2-0.5 parts, defoaming agent 1-2 parts, thixotropic lubricant 3-5 parts, retarder 0.5-2 parts, and the balance is aggregate. The aggregate and other raw materials are balanced to 100% according to the total amount of raw materials. The total amount of raw materials is calculated as 1 kg.

[0009] Specifically, the gelled material is a mixture of any one of CA-60, CA-70, and CA-80 aluminate cement and a sulphate-resistant Portland cement.

[0010] Specifically, the admixture is a mixture of granulated blast furnace slag powder, silicon powder and metakaolin in any proportion; the quartz powder is 200-400 mesh quartz powder.

[0011] Specifically, the latex powder is any one of butyl terephthalate-ethyl acetate copolymer, acrylic and styrene-butadiene latex powder, or a mixture of two or more thereof in any proportion.

[0012] The cementitious material is a cementitious material treated with a coating agent; the coating agent is prepared by mixing the following raw materials in the following mass percentages: 15-25% of acrylic resin, 8-15% of methacrylate, 5-12% of butyl stearate, 10-20% of butyl acrylate, 10-15% of acrylic acid, 1-5% of octylphenol polyoxyethylene ether, 10-15% of aluminate coupling agent, 8-12% of polyethylene wax, 1-5% of diiron trioxide and 5-10% of polyvinyl alcohol fiber; the amount of the coating agent is 2-8 wt% of the amount of the aggregate.

[0013] The cementitious material after coating treatment forms a uniform structure, enhances the surface morphology of the cementitious material, improves the strength and density of the cementitious material, improves the pore structure of the mortar, and improves the strength and impermeability of the mortar.

[0014] Specifically, the fiber is one of PP fiber, wood fiber and glass fiber, or a mixture of two or more thereof in any proportion; the fiber is used to toughen, improve the density, crack resistance and flexibility of the material, and improve the durability of the special use surface.

[0015] Specifically, the cellulose ether is a low viscosity cellulose ether; the cellulose ether is an adhesion and plasticity preserving agent that prevents segregation and sedimentation.

[0016] Specifically, the aggregate is any one of different graded iron, copper tailings sand, different graded white corundum, calcined bauxite particles and different graded alumina hollow spheres, or a mixture of two or more thereof in any proportion.

[0017] The aggregate has excellent durability and corrosion resistance, can be used in market pipeline sewage for a long time without corrosion, and at the same time, these aggregates all belong to high strength and high density aggregates, which can significantly improve the strength and density of acid-resistant mortar, and also can prevent the acid-resistant and corrosion-resistant mortar layer from being easily penetrated and corroded when it is in long-term contact with municipal pipeline sewage. Preferably, the aggregate is different graded white corundum, calcined bauxite and alumina hollow sphere.

[0018] Specifically, the hydrophobic agent is any one of zinc stearate, copper stearate and magnesium stearate, or a mixture of two or more thereof in any proportion.

[0019] The water reducing agent is polycarboxylic acid water reducing agent or naphthalene-based high efficiency water reducing agent.

[0020] The early strength agent is a lithium salt early strength agent; the early strength agent can improve the early strength of the material after final setting, achieve the expected effect in a short period of time, reduce the construction period, and accelerate construction.

[0021] The defoaming agent is one of a silicone defoaming agent and a polyether defoaming agent.

[0022] The thixotropic lubricant is one of magnesium aluminum silicate, lithium bentonite, and acid-modified bentonite or a mixture of two or more thereof in any ratio; the thixotropic lubricant can improve the construction performance of the slurry to a certain extent.

[0023] The retarder is one of sodium gluconate, sodium citrate, and tartaric acid or a mixture of two or more thereof in any ratio; the retarder is used to prolong the operable time after the raw materials are mixed with water, delay the initial setting time, avoid the short operable time after the raw materials are mixed, and reduce the influence on the strength.

[0024] The magnesium additive is one of magnesium oxide, magnesium hydroxide, and magnesium fluosilicate or a mixture of two or more thereof in any ratio.

[0025] Specifically, the early strength agent is one of lithium carbonate, lithium sulfate, lithium chloride, calcium formate, and sodium sulfate or a mixture of two or more thereof in any ratio.

[0026] Preferably, the waterproof acid-resistant mortar for municipal pipeline repair further comprises 0.1-1 parts of starch ether; the starch ether can improve the construction performance.

[0027] A preparation method of the waterproof acid-resistant mortar for municipal pipeline repair is provided.

[0028] The waterproof acid-resistant mortar for municipal pipeline repair comprises, in 1000 parts by weight, the following ingredients: 250-500 parts of cementing materials, 20-60 parts of admixtures, 1-5 parts of water reducing agents, 30-100 parts of quartz powder, 10-40 parts of latex powder, 1-5 parts of hydrophobic agents, 1-5 parts of fibers, 0.1-1 parts of cellulose ethers, 1-15 parts of magnesium additives, 0.1-0.8 parts of early strength agents, 1-5 parts of defoaming agents, 2-8 parts of thixotropic lubricants, 0.5-3 parts of retarders, and the balance of aggregates.

[0029] The waterproof acid-resistant mortar for municipal pipeline repair is prepared by using a mixture of aluminate cement and acid-resistant Portland cement as two kinds of cementitious materials, adding admixture, water reducing agent, hydrophobic additive of latex powder, and adding magnesium oxide, magnesium hydroxide and other magnesium additives, which can react and consume weak acid in sewage, and at the same time, prevent weak acid from corroding calcium silicate crystals in the mortar to form acid-resistant corrosion protection. The waterproof acid-resistant mortar can be used in plane and vertical repair in municipal sewage pipeline repair, and has good construction state and excellent performance. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of those skilled in the art, the present application will be further described below in conjunction with examples, and the content mentioned in the embodiments is not a limitation on the present application.

[0031] Example 1

[0032] The waterproof acid-resistant mortar for municipal pipeline repair, in the weight of 1000 parts, comprises the following raw materials in the weight parts: cementitious material 250 parts, admixture 60 parts, water reducing agent 5 parts, quartz powder 30 parts, latex powder 40 parts, hydrophobic agent zinc stearate 1 part, fiber 1 part, cellulose ether 0.5 part, magnesium additive 12 parts, early strength agent 0.1 part, defoaming agent 2 parts, thixotropic lubricant 4 parts, and retarder 2 parts, and the balance is aggregate. The aggregate and other raw materials are matched to 100% of the total amount of raw materials, and the total amount of raw materials is 1 kg, and 1 weight part is equivalent to 1 g.

[0033] The cementitious material is a mixture of 100 parts of CA-60 aluminate cement and 150 parts of acid-resistant Portland cement. The cementitious material is a cementitious material treated by a coating treatment agent; the coating treatment agent is prepared by mixing the following raw materials in mass percentage: 15% of acrylic resin, 8% of methyl methacrylate, 12% of butyl stearate, 10% of butyl acrylate, 15% of acrylic acid, 15% of aluminate coupling agent, 10% of polyethylene wax, 5% of octylphenol polyoxyethylene ether, 5% of ferric oxide, and 5% of polyvinyl alcohol fiber; the amount of the coating treatment agent is 3% of the amount of the cementitious material. The admixture is a mixture of 40 parts of granulated blast furnace slag powder and 20 parts of silicon powder. The magnesium additive is magnesium oxide. The aggregate is a mixture of different gradations of copper tailings and bauxite in a ratio of 1:1, which is an acid-resistant corrosion-resistant aggregate. The latex powder is an acrylic latex powder. The water reducing agent is a naphthalene-based high-efficiency water reducing agent. The fiber is a mixture of 0.5 parts of PP fiber and 0.5 parts of wood fiber. The cellulose ether is a low-viscosity cellulose ether. The defoaming agent is an organic silicon defoaming agent. The early strength agent is lithium carbonate. The thixotropic lubricant is magnesium aluminum silicate. The retarder is a mixture of sodium citrate and tartaric acid in a ratio of 1:1.

[0034] A preparation method of a waterproof acid-resistant mortar for municipal pipeline repair, the raw materials are sequentially put into a dry powder mortar mixer and mixed uniformly to obtain the waterproof acid-resistant mortar for municipal pipeline repair.

[0035] The performance results are shown in the following table:

[0036]

[0037]

[0038] Example 2

[0039] The waterproof and acid-resistant mortar for municipal pipeline repair in this embodiment comprises, per 1000 parts by weight, the following raw materials: 300 parts of cementitious material, 50 parts of admixture, 2.5 parts of water reducer, 100 parts of quartz powder, 30 parts of latex powder, 1 part of copper stearate, 1 part of magnesium stearate, 2 parts of fiber, 0.8 parts of cellulose ether, 10 parts of magnesium additive, 0.3 parts of early strength agent, 3 parts of defoamer, 2 parts of thixotropic lubricant, 1 part of retarder, with the remainder being aggregate. The aggregate and other raw materials are balanced to a total weight of 100%; the total weight of the raw materials is calculated as 1 kg, with 1 part by weight equivalent to 1 gram.

[0040] The cementitious material is a mixture of 100 parts CA-70 aluminate cement and 200 parts sulfate-resistant Portland cement. The cementitious material is treated with a coating agent. The coating agent is made by mixing the following raw materials in percentage by weight: 18% acrylic resin, 10% methacrylate, 8% butyl stearate, 13% butyl acrylate, 15% acrylic acid, 12% aluminate coupling agent, 12% polyethylene wax, 2% octylphenol polyoxyethylene ether, 2% ferric oxide, and 8% polyvinyl alcohol fiber. The coating agent is used in an amount of 2% by weight of the cementitious material. The admixture is a mixture of 30 parts silica fume and 20 parts metakaolin. The magnesium additive is magnesium hydroxide. The aggregate is a mixture of white corundum of different grades and calcined bauxite particles in a 1:2 ratio, which is acid-resistant. The latex powder is a styrene-butadiene latex powder. The water reducer is a polycarboxylate water reducer. The fiber is glass fiber. The cellulose ether is a low-viscosity cellulose ether. The defoamer is a polyether defoamer. The early strength agent is a mixture of lithium sulfate and lithium chloride in a 1:1 ratio. The thixotropic lubricant is lithium bentonite. The retarder is a mixture of sodium citrate and tartaric acid in a 1:1 ratio.

[0041] A method for preparing a waterproof and acid-resistant mortar for municipal pipeline repair comprises the following steps: sequentially adding the above raw materials into a dry mortar mixer and mixing them evenly to obtain the waterproof and acid-resistant mortar for municipal pipeline repair.

[0042] The performance results are shown in the following table:

[0043]

[0044] Example 3

[0045] The waterproof acid-resistant mortar for municipal pipeline repair of the embodiment comprises, in 1000 parts by weight, the following raw materials: cementing material 350 parts, admixture 30 parts, water reducing agent 1.8 parts, quartz powder 75 parts, latex powder 25 parts, zinc stearate 1 part, copper stearate 1 part, magnesium stearate 1 part, fiber 3 parts, cellulose ether 0.5 parts, magnesium additive 8, early strength agent 0.8 parts, defoaming agent 4 parts, thixotropic lubricant 6 parts, retarder 0.5 parts, and the balance is aggregate. The aggregate and other raw materials are balanced to 100% based on the total amount of raw materials; the total amount of raw materials is calculated as 1 kg, and 1 part by weight is equivalent to 1 g.

[0046] The cementing material is a mixture of CA-80 aluminate cement 150 parts and sulfate-resistant Portland cement 200 parts. The cementing material is a cementing material treated by a coating treatment agent; the coating treatment agent is prepared by mixing the following raw materials in mass percentage: acrylic resin 25%, methyl methacrylate 8%, butyl stearate 10%, butyl acrylate 13%, acrylic acid 15%, aluminate coupling agent 11%, polyethylene wax 9%, octylphenol polyoxyethylene ether 2%, ferric oxide 1%, and polyvinyl alcohol fiber 6%. The amount of the coating treatment agent is 5% of the amount of the cementing material. The admixture is a mixture of silica powder 15 parts and metakaolin 15 parts. The magnesium additive is a mixture of magnesium oxide 5 parts and magnesium fluosilicate 3 parts. The aggregate is a mixture of calcined bauxite particles and different gradation aluminum oxide hollow spheres in a ratio of 1:1, which is an acid corrosion-resistant aggregate. The latex powder is a butyl tertiary carbonate-ethyl acetate copolymer latex powder. The water reducing agent is a polycarboxylic acid water reducing agent. The fiber is a mixture of PP fiber 2 parts and glass fiber 1 part. The cellulose ether is a low viscosity cellulose ether. The defoaming agent is a polyether defoaming agent. The early strength agent is lithium chloride. The thixotropic lubricant is acid modified bentonite. The retarder is a mixture of sodium gluconate and sodium citrate in a ratio of 1:1.

[0047] A preparation method of a waterproof acid-resistant mortar for municipal pipeline repair, which comprises the following steps: sequentially putting the above-mentioned raw materials into a dry powder mortar mixer and mixing uniformly, to obtain the waterproof acid-resistant mortar for municipal pipeline repair.

[0048] The performance results are shown in the following table:

[0049]

[0050]

[0051] Example 4

[0052] The waterproof acid-resistant mortar for municipal pipeline repair of the embodiment comprises, in 1000 parts by weight, the following raw materials: 400 parts of cementing material, 40 parts of admixture, 2 parts of water reducing agent, 50 parts of quartz powder, 20 parts of latex powder, 2 parts of zinc stearate, 5 parts of fiber, 0.2 parts of cellulose ether, 5 parts of magnesium additive, 0.6 parts of early strength agent, 1 part of defoaming agent, 8 parts of thixotropic lubricant, 3 parts of retarder, 0.5 parts of starch ether, and the rest is aggregate. The aggregate and other raw materials are proportioned to 100% based on the total amount of raw materials; 1 part by weight corresponds to 1 g when the total amount of raw materials is 1 kg.

[0053] The cementing material is a mixture of 300 parts of CA-70 aluminate cement and 100 parts of sulfate-resistant portland cement. The cementing material is a cementing material treated by a coating treatment agent; the coating treatment agent is prepared by mixing the following raw materials in mass percentage: 20% of acrylic resin, 10% of methacrylate, 7% of butyl stearate, 15% of butyl acrylate, 13% of acrylic acid, 14% of aluminate coupling agent, 10% of polyethylene wax, 2% of octylphenol polyoxyethylene ether, 3% of ferric oxide, and 6% of polyvinyl alcohol fiber; the amount of the coating treatment agent is 6% of the amount of the cementing material. The admixture is a mixture of 20 parts of silica powder and 20 parts of granulated blast furnace slag powder. The magnesium additive is a mixture of 2 parts of magnesium oxide, 2 parts of magnesium hydroxide, and 1 part of magnesium fluosilicate. The aggregate is a mixture of different gradations of iron, different gradations of white corundum, and different gradations of alumina hollow spheres in a ratio of 1:2:1, which is an acid-resistant aggregate. The latex powder is a mixture of 10 parts of butadiene-styrene latex powder and 10 parts of butyl tertiary carbonate-ethyl acetate copolymer latex powder. The water reducing agent is a polycarboxylic acid water reducing agent. The fiber is a mixture of 2 parts of PP fiber and 3 parts of wood fiber. The cellulose ether is a low-viscosity cellulose ether. The defoaming agent is an organic silicon defoaming agent. The early strength agent is a mixture of 0.4 parts of lithium chloride and 0.2 parts of sodium sulfate. The thixotropic lubricant is a mixture of 2 parts of magnesium aluminum silicate, 3 parts of lithium bentonite, and 3 parts of acid-modified bentonite. The retarder is tartaric acid.

[0054] A preparation method of a waterproof acid-resistant mortar for municipal pipeline repair is provided. The above raw materials are sequentially put into a dry powder mortar mixer and mixed uniformly to obtain the waterproof acid-resistant mortar for municipal pipeline repair.

[0055] The performance results are shown in the following table:

[0056]

[0057] Example 5

[0058] The waterproof acid-resistant mortar for municipal pipeline repair of the embodiment comprises, in 1000 parts by weight, the following raw materials: 500 parts of cementing material, 30 parts of admixture, 3.5 parts of water reducing agent, 65 parts of quartz powder, 10 parts of latex powder, 2 parts of zinc stearate, 2 parts of magnesium stearate, 4 parts of fiber, 0.1 part of cellulose ether, 15 parts of magnesium additive, 0.4 part of early strength agent, 5 parts of defoaming agent, 5 parts of thixotropic lubricant, 1.5 parts of retarder, 1 part of starch ether, and the balance of aggregate. The aggregate and other raw materials are proportioned to 100% based on the total amount of raw materials; 1 part by weight corresponds to 1 g when the total amount of raw materials is 1 kg.

[0059] The cementing material is a mixture of 200 parts of CA-70 aluminate cement, 200 parts of CA-80 aluminate cement and 100 parts of sulfate-resistant portland cement. The cementing material is a cementing material treated by a coating treatment agent; the coating treatment agent is prepared by mixing the following raw materials in mass percentage: 18% of acrylic resin, 12% of methacrylate, 8% of butyl stearate, 18% of butyl acrylate, 14% of acrylic acid, 13% of aluminate coupling agent, 10% of polyethylene wax, 3% of octylphenol polyoxyethylene ether, 5% of ferric oxide, and 9% of polyvinyl alcohol fiber; the amount of the coating treatment agent is 8% of the amount of the cementing material. The admixture is a mixture of 10 parts of granulated blast furnace slag powder, 10 parts of silica powder and 10 parts of metakaolin in any proportion. The magnesium additive is a mixture of 10 parts of magnesium oxide and 5 parts of magnesium fluosilicate. The aggregate is different gradation copper tailings sand, calcined bauxite particles and different gradation alumina hollow spheres in a mixture of 1:3:2, which is acid-resistant corrosion-resistant aggregate. The latex powder is 10 parts of acrylic latex powder. The water reducing agent is a naphthalene-based high-efficiency water reducing agent. The fiber is wood fiber. The cellulose ether is low-viscosity cellulose ether. The defoaming agent is a polyether-based defoaming agent. The early strength agent is a mixture of calcium formate and lithium carbonate in a ratio of 1:1. The thixotropic lubricant is a mixture of 2 parts of magnesium aluminum silicate, 1 part of lithium-based bentonite and 2 parts of acid-modified bentonite. The retarder is a mixture of sodium gluconate and tartaric acid in a ratio of 1:1.

[0060] A preparation method of a waterproof acid-resistant mortar for municipal pipeline repair is provided, which comprises the following steps: sequentially putting the above-mentioned raw materials into a dry powder mortar mixer and mixing uniformly, so as to obtain the waterproof acid-resistant mortar for municipal pipeline repair.

[0061] The performance results are shown in the following table:

[0062]

[0063]

[0064] The above embodiment is a preferred implementation scheme of the present application, in addition to this, the present application can be implemented in other ways, any obvious replacement without departing from the concept of the present application is within the protection scope of the present application.

Claims

1. Waterproof and acid-resistant mortar for municipal pipeline repair, characterized by: Based on 1000 parts by weight, it includes the following raw materials in parts by weight: 250-500 parts of cementitious materials, 20-60 parts of admixtures, 1-5 parts of water reducing agent, 30-100 parts of quartz powder, 10-40 parts of latex powder, 1-5 parts of water repellent, 1-5 parts of fiber, 0.1-1 parts of cellulose ether, 1-15 parts of magnesium additive, 0.1-0.8 parts of early strength agent, 1-5 parts of defoaming agent, 2-8 parts of thixotropic lubricant, 0.5-3 parts of retarder, and the balance is aggregate; The cementitious material is a mixture of any one of CA-60, CA-70, and CA-80 aluminate cement and sulfate-resistant Portland cement; The gelling material is a gelling material treated with a coating treatment agent; the coating treatment agent is prepared by mixing the following raw materials in percentage by mass: 15%-25% acrylic resin, 8%-15% methacrylate, 5%-12% butyl stearate, 10%-20% butyl acrylate, 10%-15% acrylic acid, 10%-15% aluminate coupling agent, 8%-12% polyethylene wax, 1%-5% octylphenol polyoxyethylene ether, 1%-5% ferric oxide, and 5-10% polyvinyl alcohol fiber; The amount of the coating treatment agent is 2 to 8 wt% of the amount of the gelling material; The magnesium additive is one of magnesium oxide and magnesium hydroxide or a mixture of the two in any proportion.

2. The waterproof and acid-resistant mortar for municipal pipeline repair according to claim 1, characterized in that: Based on 1000 parts by weight, it includes the following raw materials in parts by weight: 300-400 parts of cementitious materials, 30-50 parts of admixtures, 1-2 parts of water reducer, 40-80 parts of quartz powder, 10-30 parts of latex powder, 1-5 parts of water repellent, 2-4 parts of fiber, 0.1-0.5 parts of cellulose ether, 5-10 parts of magnesium additive, 0.2-0.5 parts of early strength agent, 1-2 parts of defoaming agent, 3-5 parts of thixotropic lubricant, 0.5-2 parts of retarder, and the balance is aggregate.

3. The waterproof and acid-resistant mortar for municipal pipeline repair according to claim 1 or 2, characterized in that: The admixture is a mixture of granulated blast furnace slag powder, silica powder, and metakaolin in any proportion; the quartz powder is 200-400 mesh quartz powder; The latex powder is any one of tert-butyl carbonate-ethyl acetate copolymer, acrylic acid, and styrene-butadiene latex powders, or a mixture of two or more of them in any proportion; The fiber is one of PP fiber, wood fiber, glass fiber, or a mixture of two or more in any proportion; The cellulose ether is a low-viscosity cellulose ether.

4. The waterproof and acid-resistant mortar for municipal pipeline repair according to claim 1 or 2, characterized in that: The hydrophobic agent is any one of zinc stearate, copper stearate, and magnesium stearate, or a mixture of two or more of them in any proportion; The water reducer is a polycarboxylate water reducer or a naphthalene-based high-efficiency water reducer; The early strength agent is a lithium salt early strength agent; The defoaming agent is one of an organosilicon defoaming agent and a polyether defoaming agent; The thixotropic lubricant is one of magnesium aluminum silicate, lithium bentonite, acid-modified bentonite, or a mixture of two or more in any proportion; The retarder is one of sodium gluconate, sodium citrate and tartaric acid or a mixture of two or more of them in any proportion.

5. The waterproof and acid-resistant mortar for municipal pipeline repair according to claim 1 or 2, characterized in that: The aggregate is any one of iron tailings sand of different gradations, copper tailings sand of different gradations, white corundum of different gradations, calcined bauxite particles, and hollow alumina balls of different gradations, or a mixture of two or more of them in any proportion.

6. The waterproof and acid-resistant mortar for municipal pipeline repair according to claim 4, characterized in that: The early strength agent is one of lithium carbonate, lithium sulfate, lithium chloride, calcium formate, and sodium sulfate, or a mixture of two or more of them in any proportion.

7. The waterproof and acid-resistant mortar for municipal pipeline repair according to claim 1 or 2, characterized in that: Based on 1000 parts by weight, it also includes 0.1-1 part of starch ether.

8. The method for preparing the waterproof and acid-resistant mortar for municipal pipeline repair according to any one of claims 1 to 7, characterized in that: The above raw materials are sequentially put into a dry mortar mixer and mixed evenly to obtain waterproof and acid-resistant mortar for municipal pipeline repair.

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