A preparation method and application of a super corrosion-resistant photovoltaic pipe pile material

Abstract

The present invention provides a preparation method and application of a super corrosion-resistant photovoltaic pipe pile material. The preparation method includes the steps of: S1. Mixing and preparing a base material; the raw materials include 300-340 parts by weight of cement, 130-150 parts by weight of water, 700-760 parts by weight of grit, 25-40 parts by weight of carbon fiber powder, and 3-5 parts by weight of a retarder; S2. Mixing and preparing a corrosion-resistant powder; the raw materials include 12-15 parts by weight of silica sand, 8-12 parts by weight of chromate, 8-12 parts by weight of organosilica microsphere powder, 7-11 parts by weight of a water-soluble polymer, and 12-19 parts by weight of water; S3. Mixing and preparing a compatible powder; the raw materials include 40-50 parts by weight of quicklime powder and 10-15 parts by weight of an air-entraining agent; S4. Preparing a mixture; first adding the base material to a mixer for stirring, then adding the compatible powder to the mixer for stirring. After dense bubbles appear, adding the corrosion-resistant powder to the mixer for stirring until no bubbles are generated, thus obtaining the super corrosion-resistant photovoltaic pipe pile material. The pipe pile made of the material of the present invention has stronger corrosion resistance and higher compressive strength.

Description

Technical Field

[0001] The present invention relates to the technical field of photovoltaic pipe pile materials, and in particular to a preparation method and application of a super corrosion-resistant photovoltaic pipe pile material. Background Art

[0002] Actively promoting green energy represented by photovoltaic power generation has a positive significance for adjusting the energy structure. The "agricultural photovoltaic complementary" photovoltaic power station combines the needs of photovoltaic power generation and agricultural planting. Its engineering structure is quite different from that of conventional photovoltaic power stations. Among them, the reasonable selection of photovoltaic column foundation is one of the signs of the success of the "agricultural photovoltaic complementary" photovoltaic power station, and it is also the focus of bearing capacity, agricultural planting conditions and construction feasibility.

[0003] The "agricultural photovoltaic complementary" photovoltaic power station has the characteristics of large land area and complex geological structure. The reasonable selection of pile foundation structure plays a decisive role in project implementation and cost management. The foundation of the "agricultural photovoltaic complementary" power station is basically composed of the foundation body + photovoltaic support. Considering the comprehensive project cost, structure height, site conditions, agricultural planting needs and construction feasibility, the commonly used "agricultural photovoltaic complementary" support foundation main structure is the prestressed concrete pipe pile PHC300-A-70.

[0004] The method of sinking prestressed pipe piles is to use external force (such as hammering, static pressure, vibration, etc.) to press the pile body into the soil layer until the relevant parameters (such as elevation, penetration or bearing capacity, etc.) are met. The existing prestressed concrete pipe pile PHC300-A-70 is highly sensitive to soil and is mainly suitable for soft soil layers. When there is high-strength geology (such as granite, etc.) in the soil layer, it is easy to cause quality risks such as broken piles and pile body tilting, and the compressive strength and impact resistance need to be improved. In addition, under outdoor conditions, especially in southwest China, the environment is humid, and the corrosion resistance of concrete pipe piles also needs to be improved. Therefore, it is necessary to provide a method for preparing and applying a super-corrosion-resistant photovoltaic pipe pile material to solve the problems existing in the above-mentioned prior art. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a method for preparing a super corrosion-resistant photovoltaic pipe pile material and its application, which adopts the following technical solutions:

[0006] A method for preparing a super corrosion-resistant photovoltaic pipe pile material comprises the following steps:

[0007] S1, mixing and preparing base material;

[0008] The raw materials of the base material include 300-340 parts of cement, 130-150 parts of water, 700-760 parts of gravel, 25-40 parts of carbon fiber powder and 3-5 parts of retarder by weight;

[0009] S2. Mix and prepare corrosion-resistant powder materials;

[0010] The raw materials of the corrosion-resistant powder materials, by weight, include 12 - 15 parts of silica sand, 8 - 12 parts of chromate, 8 - 12 parts of silicone microsphere powder, 7 - 11 parts of water-soluble polymer, and 12 - 19 parts of water;

[0011] S3. Mix and prepare compatible powder materials;

[0012] The raw materials of the compatible powder materials, by weight, include 40 - 50 parts of quicklime powder and 10 - 15 parts of air-entraining agent;

[0013] S4. Prepare the mixture;

[0014] First, add the base material obtained in S1 to a mixer for stirring. Then, add the compatible powder material obtained in S3 to the mixer and continue stirring. After dense bubbles appear, add the corrosion-resistant powder material obtained in S2 to the mixer and continue stirring until no bubbles are generated, thus obtaining the mixture, which is the super corrosion-resistant photovoltaic pipe pile material.

[0015] The base material can provide a firm and solid structural framework foundation for the finally prepared pipe pile; as a hydrophobic surfactant, the air-entraining agent can be dissolved in water during the stirring process, generating a large number of tiny bubbles, thereby improving the workability, water retention, and cohesion of the base material, enhancing the fluidity of the base material, introducing a large number of uniformly distributed, closed, and stable tiny bubbles during the stirring process of the base material. At the same time, quicklime reacts with water to release heat, even causing the water to boil. A large amount of heat causes the bubbles to burst quickly, generating dense holes quickly in the base material, which is conducive to the rapid, uniform, and in-depth filling of the corrosion-resistant powder material, saving process time; the corrosion-resistant powder material has a self-hydrophobic function and is uniformly distributed in the base material, making the pipe pile material have good hydrophobic effect and strong corrosion resistance.

[0016] Furthermore, the specific operation steps of S2 are as follows:

[0017] S21. Dissolve the water-soluble polymer in water to obtain an aqueous solution of the water-soluble polymer;

[0018] S22. Stir and mix silica sand, chromate, and silicone microsphere powder in a mixer to obtain a mixed powder;

[0019] S23. Spray-coat the mixed powder obtained in S22 with the aqueous solution of the water-soluble polymer obtained in S21 and dry it in a spray dryer to obtain the corrosion-resistant powder material.

[0020] Preferably, in S22, the stirring linear velocity of the mixer is controlled at 12 - 40 m / s; in S23, stirring is continuously carried out during the spray-coating process, and the stirring linear velocity is also controlled at 12 - 40 m / s.

[0021] Preferably, in S23, the inlet temperature of the spray dryer is 200 - 245 °C, and the outlet temperature is 85 - 100 °C.

[0022] Using a mixed powder prepared by mixing silica sand, chromate, and silicone microsphere powder as the core material, and the water-soluble polymer is located on the surface layer of the core material, thereby obtaining spherical corrosion-resistant powder materials with a water-soluble polymer outer skin. Compared with the products made of existing inorganic materials, the adsorption capacity and hydrophobic performance are effectively improved. On the premise of achieving the same hydrophobic effect, the dosage of similar products can be reduced, saving costs.

[0023] Furthermore, the particle size of the corrosion-resistant powder is 100 - 350 μm.

[0024] Avoiding too large or too small particle sizes is more conducive to the rapid filling of the corrosion-resistant powder into the dense holes generated in the base material, ensuring the efficient mixing of the corrosion-resistant powder and the base material.

[0025] Furthermore, the raw materials of the base material, by weight, include 310 parts of cement, 135 parts of water, 712 parts of gravel, 28 parts of carbon fiber powder, and 4 parts of retarder; the raw materials of the corrosion-resistant powder, by weight, include 13 parts of silica sand, 11 parts of chromate, 9 parts of silicone microsphere powder, 11 parts of water-soluble polymer, and 15 parts of water; the raw materials of the compatible powder, by weight, include 45 parts of quicklime powder and 12 parts of air-entraining agent.

[0026] Furthermore, the specific operation steps of S1 are as follows:

[0027] S11: First, add cement, water, and gravel into a mixer and stir at a linear speed of 15 - 30 m / s for 15 - 25 min;

[0028] S12: Then, add carbon fiber powder and retarder into the mixer in sequence and stir at a linear speed of 7 - 12 m / s for 3 - 5 min to obtain the base material.

[0029] During the preparation of the base material, the mixture of cement, water, and gravel forms the basic components of the base material, while carbon fiber powder and retarder are the functional components of the base material. Carbon fiber powder can directly improve the crack resistance and wear resistance of the finally prepared pipe piles; the retarder can delay the cement hydration reaction, thereby delaying the setting time and ensuring the normal and smooth progress of the subsequent processes after the preparation of the base material.

[0030] Furthermore, the compatible powder obtained in S3 is put into S4 for preparing the mixture within 10 min after preparation.

[0031] After quicklime is mixed with an air-entraining agent, it is not easy to be stored for a long time and is prone to denaturation, which affects the effects of both. Therefore, using it within 10 minutes can ensure that the quicklime and the air-entraining agent can normally achieve a synergistic effect.

[0032] Application of a pipe pile material prepared by the method for preparing a super corrosion-resistant photovoltaic pipe pile material as described above, used for preparing a super corrosion-resistant photovoltaic pipe pile, including the following steps:

[0033] A1. Molding;

[0034] Apply a release agent to the inner wall of the mold groove for pouring the pipe pile, then place the steel reinforcement cage in the mold groove, and then pour the pipe pile material into the mold groove, close the mold, perform prestress tensioning, and centrifugal forming to obtain a formed mold;

[0035] A2. Primary curing;

[0036] Perform static curing and normal pressure steam curing on the formed mold obtained in A1, and remove the mold to obtain a formed pipe pile;

[0037] A3. Deep curing;

[0038] Place the formed pipe pile obtained in A1 in a sealed container. The sealed container includes a sealed housing, a heating device installed on the sealed housing and used for heating, and a vacuum pumping device connected to the sealed housing. The vacuum pumping device is used to increase the pressure in the sealed housing to 1.08 - 1.4×10 5 MPa, and the heating device is used to raise the temperature in the sealed housing to 160 - 195 °C. After maintaining for 2 - 3 hours, take out the formed pipe pile from the sealed container and cool it down to obtain a super corrosion-resistant photovoltaic pipe pile.

[0039] Further, the specific operation steps of A3 are as follows:

[0040] A31. The vacuum pumping device controls the pressure in the sealed housing within 5 minutes to 1.08 - 1.2×10 5 MPa; the heating device raises the temperature in the sealed housing to 160 - 175 °C within 5 minutes and maintains for 1 - 1.5 hours;

[0041] A32. Subsequently, the vacuum pumping device controls the pressure in the sealed housing within 5 minutes to 1.2 - 1.4×10 5 MPa; the heating device raises the temperature in the sealed housing to 175 - 195 °C within 5 minutes and maintains for 1 - 1.5 hours.

[0042] After molding and primary curing, continue to apply pressure and increase the temperature for deep curing, which can further enhance the compressive strength and impact resistance of the pipe piles. By applying pressure and increasing the temperature in stages, the compressive strength and impact resistance of the pipe piles can be enhanced progressively, avoiding damage to the pipe piles due to sudden changes in the external curing environment during the deep curing process of applying pressure and increasing the temperature.

[0043] The above technical solutions of the present invention have at least the following beneficial effects:

[0044] 1. The base material in the preparation raw materials of the present invention can provide a firm and solid structural framework foundation for the finally prepared pipe piles; as a hydrophobic surfactant, the air-entraining agent can dissolve in water during the stirring process when added to the base material, generating a large number of tiny bubbles, thereby improving the workability, water retention and cohesion of the base material, increasing the fluidity of the base material, introducing a large number of uniformly distributed, closed and stable tiny bubbles during the stirring process of the base material. At the same time, quicklime reacts with water to release heat, even boiling the water, and a large amount of heat causes the bubbles to burst quickly, generating dense holes rapidly in the base material, which is conducive to the rapid, uniform and in-depth filling of the corrosion-resistant powder, saving process time; the corrosion-resistant powder has its own hydrophobic function and is evenly distributed in the base material, making the pipe pile material have good hydrophobic effect and strong corrosion resistance;

[0045] 2. The corrosion-resistant powder uses a mixed powder prepared by mixing silica sand, chromate and silicone microsphere powder as the core material, and the water-soluble polymer is located on the surface layer of the core material, thus obtaining spherical corrosion-resistant powder with a water-soluble polymer outer skin. Compared with the products made of existing inorganic materials, its adsorption amount and hydrophobic performance are effectively improved. On the premise of achieving the same hydrophobic effect, the dosage of similar products can be reduced, saving costs;

[0046] 3. The particle size of the corrosion-resistant powder is 100 - 350 μm, which avoids too large or too small particle size, and is more conducive to the rapid filling of the corrosion-resistant powder into the dense holes generated in the base material, ensuring the efficient mixing of the corrosion-resistant powder and the base material;

[0047] 4. During the preparation of the base material, the mixture of cement, water and gravel is the basic component of the base material, while carbon fiber powder and retarder are the functional components of the base material. Carbon fiber powder can directly improve the crack resistance and wear resistance of the finally prepared pipe piles; the retarder can delay the hydration reaction of cement, thereby delaying the setting time and ensuring the normal and smooth progress of the subsequent processes after the preparation of the base material is completed;

[0048] 5. After the quicklime and the air-entraining agent are mixed, they are not easy to be stored for a long time and are prone to denaturation, affecting the effects of both. Therefore, the compatible powder prepared in S3 is put into S4 to prepare the mixture within 10 minutes after preparation, which can ensure that the quicklime and the air-entraining agent can normally achieve the synergistic effect;

[0049] 6. After molding and primary curing, continue to pressurize and heat for deep curing, which can further enhance the compressive strength and impact resistance of the pipe piles; and pressurizing and heating in stages can progressively enhance the compressive strength and impact resistance of the pipe piles, and avoid damage to the pipe piles due to sudden changes in the external curing environment during the deep curing process of pressurization and heating. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in combination with the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0051] Example 1

[0052] A method for preparing a super corrosion-resistant photovoltaic pipe pile material comprises the following steps:

[0053] S1. Mix and prepare a base material; the raw materials of the base material include, by weight, 310 parts of cement, 135 parts of water, 712 parts of gravel, 28 parts of carbon fiber powder and 4 parts of retarder.

[0054] The specific operation steps of S1 are as follows:

[0055] S11, first add cement, water and gravel into the mixer, and stir at a linear speed of 20m / s for 20min;

[0056] S12, successively adding the carbon fiber powder and the retarder into the mixer, stirring at a linear speed of 8 m / s for 4 minutes to obtain the base material.

[0057] S2. Mix and prepare corrosion-resistant powder; the raw materials of the corrosion-resistant powder include, by weight, 13 parts of silica sand, 11 parts of chromate, 9 parts of organic silicon microsphere powder, 11 parts of water-soluble polymer and 15 parts of water.

[0058] The specific operation steps of S2 are as follows:

[0059] S21, dissolving a water-soluble polymer in water to obtain a water-soluble polymer aqueous solution;

[0060] S22, mixing silica sand, chromate and organosilicon microsphere powder in a mixer, controlling the stirring line speed of the mixer to 20 m / s, stirring for 12 min, to obtain a mixed powder;

[0061] S23. Spray-coat the mixed powder obtained in S22 with the water-soluble polymer aqueous solution obtained in S21. During the spray-coating process, continuous stirring is carried out, and the linear velocity of stirring is controlled at 15 m / s. Dry it in a spray dryer. The inlet temperature of the spray dryer is about 220 °C, and the outlet temperature is about 90 °C to obtain corrosion-resistant powder. The particle size of the corrosion-resistant powder is about 200 μm.

[0062] S3. Mix and prepare compatible powder; the raw materials of the compatible powder, by weight, include 45 parts of quicklime powder and 12 parts of air-entraining agent.

[0063] Directly mix and stir the quicklime powder and the air-entraining agent to obtain the compatible powder.

[0064] The compatible powder is not easy to store alone for a long time. It needs to be put into the next step S4 to prepare the mixture within 10 minutes after preparation.

[0065] S4. Prepare the mixture;

[0066] First, add the base material obtained in S1 to a blender for stirring. Then, add the compatible powder obtained in S3 to the blender and continue stirring. After dense bubbles appear, add the corrosion-resistant powder obtained in S2 to the blender and continue stirring until no bubbles are generated, thus obtaining the mixture, which is the ultra-corrosion-resistant photovoltaic pipe pile material.

[0067] The application of a pipe pile material prepared by the above method for preparing an ultra-corrosion-resistant photovoltaic pipe pile material, used for preparing an ultra-corrosion-resistant photovoltaic pipe pile, includes the following steps:

[0068] A1. Molding;

[0069] Apply a release agent to the inner wall of the mold groove for pouring the pipe pile, then place the steel reinforcement cage in the mold groove, and then pour the said pipe pile material into the mold groove, close the mold, perform prestressed tensioning, and centrifugal molding to obtain the formed mold.

[0070] A2. Primary curing;

[0071] Perform static curing and atmospheric steam curing on the formed mold obtained in A1, and remove the mold to obtain the formed pipe pile.

[0072] A3. Deep curing;

[0073] Place the formed pipe pile obtained in A1 in a sealed container. The sealed container includes a sealed housing, a heating device installed on the sealed housing and used for heating, and a vacuum pumping device connected to the sealed housing. The heating device includes heating wires or heat-conducting oil pipes, which are well-known prior arts to those skilled in the art and will not be further described here. The vacuum pumping device includes an external vacuum pumping system, which is well-known prior arts to those skilled in the art and will not be further described here.

[0074] The vacuum pumping device controls the pressure inside the sealed housing within 5 minutes to 1.1×10 5 MPa, and the heating device raises the temperature inside the sealed housing to 162 °C within 5 minutes and maintains it for 1.5 hours; subsequently, the vacuum pumping device controls the pressure inside the sealed housing within 5 minutes to 1.4×10 5 MPa; the heating device raises the temperature inside the sealed housing to 195 °C within 5 minutes and maintains it for 1.5 hours.

[0075] Take out the formed pipe pile from the sealed container and cool it down to obtain the super corrosion-resistant photovoltaic pipe pile.

[0076] Example 2

[0077] The difference between this example and Example 1 is only that:

[0078] The raw materials of the base material, by weight, include 300 parts of cement, 130 parts of water, 700 parts of grit, 25 parts of carbon fiber powder, and 3 parts of retarder;

[0079] The raw materials of the corrosion-resistant powder, by weight, include 12 parts of silica sand, 8 parts of chromate, 8 parts of silicone microsphere powder, 7 parts of water-soluble polymer, and 12 parts of water;

[0080] The raw materials of the compatible powder, by weight, include 50 parts of quicklime powder and 15 parts of air-entraining agent.

[0081] Example 3

[0082] The difference between this example and Example 1 is only that:

[0083] The raw materials of the base material, by weight, include 340 parts of cement, 150 parts of water, 760 parts of grit, 40 parts of carbon fiber powder, and 5 parts of retarder;

[0084] The raw materials of the corrosion-resistant powder, by weight, include 15 parts of silica sand, 12 parts of chromate, 12 parts of silicone microsphere powder, 11 parts of water-soluble polymer, and 19 parts of water;

[0085] The raw materials of the compatible powder, by weight, include 40 parts of quicklime powder and 10 parts of air-entraining agent.

[0086] Example 4

[0087] The difference between this example and Example 1 is only that:

[0088] The raw materials of the base material, by weight, include 320 parts of cement, 140 parts of water, 730 parts of grit, 32 parts of carbon fiber powder, and 4 parts of retarder;

[0089] The raw materials of the corrosion-resistant powder include, by weight, 13 parts of silica sand, 10 parts of chromate, 10 parts of silicone microsphere powder, 9 parts of water-soluble polymer, and 16 parts of water;

[0090] The raw materials of the compatible powder include, by weight, 45 parts of quicklime powder and 13 parts of air-entraining agent.

[0091] Example 5

[0092] The difference between this example and Example 1 is only that:

[0093] The raw materials of the base material include, by weight, 330 parts of cement, 140 parts of water, 750 parts of gravel, 30 parts of carbon fiber powder, and 3 parts of retarder;

[0094] The raw materials of the corrosion-resistant powder include, by weight, 15 parts of silica sand, 12 parts of chromate, 12 parts of silicone microsphere powder, 7 parts of water-soluble polymer, and 12 parts of water;

[0095] The raw materials of the compatible powder include, by weight, 50 parts of quicklime powder and 10 parts of air-entraining agent.

[0096] Example 6

[0097] The difference between this example and Example 1 is only that:

[0098] The raw materials of the base material include, by weight, 310 parts of cement, 135 parts of water, 705 parts of gravel, 38 parts of carbon fiber powder, and 5 parts of retarder;

[0099] The raw materials of the corrosion-resistant powder include, by weight, 12 parts of silica sand, 8 parts of chromate, 8 parts of silicone microsphere powder, 11 parts of water-soluble polymer, and 19 parts of water;

[0100] The raw materials of the compatible powder include, by weight, 45 parts of quicklime powder and 14 parts of air-entraining agent.

[0101] Comparative Example 1

[0102] The difference between this comparative example and Example 1 is only that: The compatible powder and its preparation steps are deleted, specifically as follows:

[0103] S1. Mix and prepare the base material; The raw materials of the base material include, by weight, 310 parts of cement, 135 parts of water, 712 parts of gravel, 28 parts of carbon fiber powder, and 4 parts of retarder.

[0104] The specific operation steps of S1 are as follows:

[0105] S11. First, add cement, water, and gravel into a mixer, and stir at a linear speed of 20 m / s for 20 min;

[0106] S12. Subsequently, add carbon fiber powder and retarder into the mixer in sequence, and stir at a linear velocity of 8 m / s for 4 min to obtain the base material.

[0107] S2. Prepare the corrosion-resistant powder mixture; the raw materials of the corrosion-resistant powder mixture, by weight, include 13 parts of silica sand, 11 parts of chromate, 9 parts of silicone microsphere powder, 11 parts of water-soluble polymer, and 15 parts of water.

[0108] The specific operation steps of S2 are as follows:

[0109] S21. Dissolve the water-soluble polymer in water to obtain an aqueous solution of the water-soluble polymer.

[0110] S22. Stir and mix silica sand, chromate, and silicone microsphere powder in a mixer, and control the stirring linear velocity of the mixer at 20 m / s and stir for 12 min to obtain a mixed powder.

[0111] S23. Spray-coat the mixed powder obtained in S22 with the aqueous solution of the water-soluble polymer obtained in S21. During the spray-coating process, continuously stir, and control the stirring linear velocity at 15 m / s. Dry in a spray dryer. The inlet temperature of the spray dryer is about 220 °C, and the outlet temperature is about 90 °C to obtain the corrosion-resistant powder mixture. The particle size of the corrosion-resistant powder mixture is about 200 μm.

[0112] S3. Prepare the mixture.

[0113] First, add the base material obtained in S1 into a mixer for stirring. Then, add the corrosion-resistant powder mixture obtained in S2 into the mixer and continue stirring to obtain the mixture, which is the ultra-corrosion-resistant photovoltaic pipe pile material.

[0114] Application of the pipe pile material prepared by the above method for preparing ultra-corrosion-resistant photovoltaic pipe pile material, used for preparing ultra-corrosion-resistant photovoltaic pipe piles. The preparation steps are the same as those in Example 1.

[0115] Comparative Example 2

[0116] The difference between this comparative example and Example 1 is only that: the corrosion-resistant powder mixture and its preparation steps are deleted, specifically as follows:

[0117] S1. Prepare the base material by mixing; the raw materials of the base material, by weight, include 310 parts of cement, 135 parts of water, 712 parts of gravel, 28 parts of carbon fiber powder, and 4 parts of retarder.

[0118] The specific operation steps of S1 are as follows:

[0119] S11. First, add cement, water, and gravel into a mixer and stir at a linear velocity of 20 m / s for 20 min.

[0120] S12. Then, successively add carbon fiber powder and retarder into the mixer and stir at a linear speed of 8 m / s for 4 min to obtain the base material.

[0121] S2. Prepare the compatible powder; the raw materials of the compatible powder include 45 parts by weight of quicklime powder and 12 parts by weight of air-entraining agent.

[0122] Directly mix and stir quicklime powder and air-entraining agent to obtain the compatible powder.

[0123] The compatible powder is not easy to be stored alone for a long time and needs to be put into the next step S3 to prepare the mixture within 10 min after preparation.

[0124] S3. Prepare the mixture;

[0125] First, add the base material obtained in S1 into the mixer for stirring. Then, add the compatible powder obtained in S2 into the mixer and continue to stir. Dense bubbles will appear. Wait until no bubbles are generated to obtain the mixture, which is the ultra-corrosion-resistant photovoltaic pipe pile material.

[0126] The application of the pipe pile material prepared by the above ultra-corrosion-resistant photovoltaic pipe pile material preparation method is used to prepare an ultra-corrosion-resistant photovoltaic pipe pile, and the preparation steps are the same as those in Example 1.

[0127] Comparative Example 3

[0128] The difference between this comparative example and Example 1 is only that: the corrosion-resistant powder and the compatible powder and their preparation steps are deleted, as follows:

[0129] S1. Prepare the base material by mixing; the raw materials of the base material include 310 parts by weight of cement, 135 parts by weight of water, 712 parts by weight of gravel, 28 parts by weight of carbon fiber powder and 4 parts by weight of retarder.

[0130] The specific operation steps of S1 are as follows:

[0131] S11. First, add cement, water and gravel into the mixer and stir at a linear speed of 20 m / s for 20 min;

[0132] S12. Then, successively add carbon fiber powder and retarder into the mixer and stir at a linear speed of 8 m / s for 4 min to obtain the base material.

[0133] This base material is the ultra-corrosion-resistant photovoltaic pipe pile material.

[0134] The application of the pipe pile material prepared by the above ultra-corrosion-resistant photovoltaic pipe pile material preparation method is used to prepare an ultra-corrosion-resistant photovoltaic pipe pile, and the preparation steps are the same as those in Example 1.

[0135] Comparative Example 4

[0136] The difference between this comparative example and Example 1 is only that quicklime is deleted from the raw materials of the compatible powder material, and only 12 parts of air-entraining agent are included.

[0137] S1. Prepare the base material by mixing; the raw materials of the base material include, by weight, 310 parts of cement, 135 parts of water, 712 parts of grit, 28 parts of carbon fiber powder, and 4 parts of retarder.

[0138] The specific operation steps of S1 are as follows:

[0139] S11. First, add cement, water, and grit into a mixer, and stir at a linear speed of 20 m / s for 20 min;

[0140] S12. Then, add carbon fiber powder and retarder into the mixer in sequence, and stir at a linear speed of 8 m / s for 4 min to obtain the base material.

[0141] S2. Prepare the corrosion-resistant powder material by mixing; the raw materials of the corrosion-resistant powder material include, by weight, 13 parts of silica sand, 11 parts of chromate, 9 parts of silicone microsphere powder, 11 parts of water-soluble polymer, and 15 parts of water.

[0142] The specific operation steps of S2 are as follows:

[0143] S21. Dissolve the water-soluble polymer in water to prepare an aqueous solution of the water-soluble polymer;

[0144] S22. Stir and mix silica sand, chromate, and silicone microsphere powder in a mixer, and control the stirring linear speed of the mixer at 20 m / s and stir for 12 min to obtain a mixed powder;

[0145] S23. Spray-coat the mixed powder obtained in S22 with the aqueous solution of the water-soluble polymer obtained in S21. During the spray-coating process, continuous stirring is carried out, and the stirring linear speed is controlled at 15 m / s. Dry in a spray dryer. The inlet temperature of the spray dryer is about 220 °C, and the outlet temperature is about 90 °C to obtain the corrosion-resistant powder material. The particle size of the corrosion-resistant powder material is about 200 μm.

[0146] S3. Prepare the compatible powder material; the raw materials of the compatible powder material include 12 parts of air-entraining agent.

[0147] S4. Prepare the mixed material;

[0148] First, add the base material obtained in S1 into a mixer for stirring. Then, add the compatible powder material in S3 into the mixer and continue stirring. After dense bubbles appear, add the corrosion-resistant powder material obtained in S2 into the mixer and continue stirring until the bubbles do not disappear to obtain the mixed material, which is the ultra-corrosion-resistant photovoltaic pipe pile material.

[0149] Application of the pipe pile material prepared by the above method for preparing a super corrosion-resistant photovoltaic pipe pile, used for preparing a super corrosion-resistant photovoltaic pipe pile, and the preparation steps are the same as those in Example 1.

[0150] Comparative Example 5

[0151] The difference between this comparative example and Example 1 is only that: the application of the pipe pile material prepared by the method for preparing a super corrosion-resistant photovoltaic pipe pile, used for preparing a super corrosion-resistant photovoltaic pipe pile, in the preparation steps, the deep curing step is deleted, and the details are as follows:

[0152] A1. Molding;

[0153] Apply a release agent to the inner wall of the mold groove for pouring the pipe pile, then place the steel reinforcement cage in the mold groove, and then pour the pipe pile material into the mold groove, close the mold, perform prestress tensioning, and centrifugal molding to obtain a molded mold.

[0154] A2. Primary curing;

[0155] Perform static curing and atmospheric steam curing on the molded mold obtained in A1, and remove the mold to obtain a molded pipe pile, and this molded pipe pile is the super corrosion-resistant photovoltaic pipe pile.

[0156] Comparative Example 6

[0157] The difference between this comparative example and Example 1 is only that: the application of the pipe pile material prepared by the method for preparing a super corrosion-resistant photovoltaic pipe pile, used for preparing a super corrosion-resistant photovoltaic pipe pile, in the deep curing step of the preparation steps does not perform progressive pressure increase and temperature increase operations, but directly reaches the final effect of pressure increase and temperature increase, and the details are as follows:

[0158] A1. Molding;

[0159] Apply a release agent to the inner wall of the mold groove for pouring the pipe pile, then place the steel reinforcement cage in the mold groove, and then pour the pipe pile material into the mold groove, close the mold, perform prestress tensioning, and centrifugal molding to obtain a molded mold.

[0160] A2. Primary curing;

[0161] Perform static curing and atmospheric steam curing on the molded mold obtained in A1, and remove the mold to obtain a molded pipe pile.

[0162] A3. Deep curing;

[0163] Place the molded pipe pile obtained in A1 in a sealed container. The sealed container includes a sealed housing, a heating device installed on the sealed housing and used for heating, and a vacuum pumping device connected to the sealed housing. The heating device includes heating wires or heat conduction oil pipes, which are well-known prior arts to those skilled in the art and will not be further described here. The vacuum pumping device includes an external vacuum pumping system, which is well-known prior arts to those skilled in the art and will not be further described here.

[0164] The vacuum pumping device controls the pressure inside the sealed housing within 5 minutes to 1.4×10 5 MPa; the heating device raises the temperature inside the sealed housing to 195 °C within 5 minutes and maintains it for 3 hours.

[0165] Take out the formed pipe pile from the sealed container and cool it down to obtain the super corrosion-resistant photovoltaic pipe pile.

[0166] Comparative Example 7

[0167] This comparative example selects an existing prestressed concrete pipe pile.

[0168] Test Example 1

[0169] Test objects: Examples 1-6 and Comparative Examples 1-4;

[0170] Test item: Corrosion resistance - contact angle test;

[0171] Test procedure: Respectively load the pipe pile materials obtained in Examples 1-6 and Comparative Examples 1-4 into a metal trough with a length of 10 mm, a width of 10 mm, and a depth of 5 mm, level it, and place it in a standard concrete curing room. After curing for 7 days under the environment of a temperature of 20 ± 2 °C and a RH of 90 ± 5%, the contact angle is measured.

[0172] Test results: See Table 1.

[0173]

[0174] Table 1

[0175] As can be seen from Table 1: Among Examples 1-6, the proportion of each raw material component in Example 1 is the optimal proportion, that is, Example 1 is the best example. The water contact angles of the pipe pile materials after curing in Example 1 and Comparative Examples 1-4 are 94.38°, 86.52°, 74.94°, 75.27°, and 89.02° respectively. It can be seen that the corrosion-resistant powder plays a role in directly increasing the water contact angle of the pipe pile material after curing, that is, it can directly improve the corrosion resistance of the pipe pile; the compatible powder itself does not have the function of increasing the water contact angle of the pipe pile material after curing, that is, it cannot directly improve the corrosion resistance of the pipe pile, but plays an auxiliary role, which is conducive to the full play of the performance of the corrosion-resistant powder.

[0176] Principle of action effect: The base material can provide a firm and solid structural framework foundation for the finally produced pipe pile; as a hydrophobic surfactant, the air-entraining agent can be dissolved in water during the mixing process, generating a large number of tiny bubbles, thereby improving the workability, water retention and cohesion of the base material, enhancing the fluidity of the base material, introducing a large number of uniformly distributed, closed and stable tiny bubbles during the mixing process of the base material. At the same time, quicklime reacts with water to release heat, even boiling the water. A large amount of heat causes the bubbles to burst quickly, generating dense holes rapidly in the base material, which is beneficial to the quick, uniform and in-depth filling of the corrosion-resistant powder, saving the process time; the corrosion-resistant powder has a hydrophobic function by itself and is uniformly distributed in the base material, making the hydrophobic effect of the pipe pile material better and the corrosion resistance stronger.

[0177] Test Example 2

[0178] Test objects: Example 1 and Comparative Examples 5-7;

[0179] Test items: Compressive strength;

[0180] Test basis: The compressive strength of the above test objects was tested in accordance with the "Standard Test Method for Mechanical Properties of Ordinary Concrete GB / T 50081-2002".

[0181] Test results: See Table 2.

[0182]

[0183] Table 2

[0184] It can be seen from Table 2 that in terms of the compressive strength performance, Example 1 > Comparative Example 6 > Comparative Example 5 > Comparative Example 7, that is, after forming and primary curing, continuing to apply pressure and raise the temperature for deep curing can further enhance the compressive strength and impact resistance of the pipe pile, while applying pressure and raising the temperature in stages can enhance the compressive strength and impact resistance of the pipe pile progressively, making the enhancement effect more significant.

[0185] In addition, Example 1 was repeated 6 times and all were normal; while Comparative Example 6 was repeated 6 times, and there were two cases where a small amount of cracks appeared on the outer wall of the finally obtained super corrosion-resistant photovoltaic pipe pile. This is because the environmental pressure and temperature in the deep curing stage increased too suddenly, and there is a certain probability of damaging the pipe pile. Therefore, it can be seen that in the deep curing stage, applying pressure and raising the temperature in stages can avoid the damage of the pipe pile caused by sudden changes in the external environment.

[0186] The above are the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A preparation method of a super corrosion-resistant photovoltaic pipe pile material, characterized in that, The following steps are involved: S1, mixing and preparing base material; The raw materials of the base material include 300-340 parts of cement, 130-150 parts of water, 700-760 parts of gravel, 25-40 parts of carbon fiber powder and 3-5 parts of retarder by weight; S2, mixing and preparing corrosion-resistant powder; The raw materials of the corrosion-resistant powder include, by weight, 12-15 parts of silica sand, 8-12 parts of chromate, 8-12 parts of organic silicon microsphere powder, 7-11 parts of water-soluble polymer and 12-19 parts of water; S3, mixing and preparing compatible powder; The raw materials of the compatible powder include 40-50 parts of quicklime powder and 10-15 parts of air entraining agent by weight; S4, preparing a mixture; First, add the base material obtained from S1 into the mixer for stirring, then add the compatible powder obtained from S3 into the mixer, continue stirring, and after dense bubbles appear, add the corrosion-resistant powder obtained from S2 into the mixer, continue stirring until no bubbles are generated, and obtain a mixture, which is the super corrosion-resistant photovoltaic pipe pile material; The application of the super corrosion-resistant photovoltaic pipe pile material is used to prepare super corrosion-resistant photovoltaic pipe piles, comprising the following steps: A1, mold forming; A mold release agent is applied to the inner wall of the mold groove for casting pipe piles, and then a steel cage is placed in the mold groove, and then the pipe pile material is poured into the mold groove, and the mold is closed, prestressed, stretched, and centrifuged to obtain a forming mold; A2, primary maintenance; The forming mold obtained in A1 is subjected to static curing and normal pressure steam curing, and the mold is removed to obtain a formed pipe pile; A3, deep maintenance; Place the formed pipe pile obtained from A1 in a sealed container. The sealed container includes a sealed housing, a heating device installed on the sealed housing and used for heating, and a vacuum pumping device connected to the sealed housing. The vacuum pumping device is used to increase the pressure in the sealed housing to 1.08 - 1.4×10 5 MPa, and the heating device is used to raise the temperature in the sealed housing to 160 - 195 °C. After maintaining for 2 - 3 h, take out the formed pipe pile from the sealed container and cool it down to obtain a super corrosion-resistant photovoltaic pipe pile; The specific operation steps of A3 are as follows: A31. The vacuum pumping device controls the pressure inside the sealed housing within 1.08 - 1.2*10 5 MPa within 5 minutes; the heating device raises the temperature inside the sealed housing to 160 - 175 °C within 5 minutes and maintains it for 1 - 1.5 hours; A32. Subsequently, the vacuum pumping device controls the pressure inside the sealed housing within 5 minutes to be 1.2 - 1.4×10 5 MPa; the heating device raises the temperature inside the sealed housing to 175 - 195°C within 5 minutes and maintains it for 1 - 1.5 hours.

2. The preparation method of the super corrosion-resistant photovoltaic pipe pile material according to claim 1, wherein The specific operation steps of S2 are as follows: S21, dissolving a water-soluble polymer in water to obtain a water-soluble polymer aqueous solution; S22, mixing silica sand, chromate and organosilicon microsphere powder in a mixer to obtain a mixed powder; S23, spray-coating the mixed powder obtained in S22 with the water-soluble polymer aqueous solution obtained in S21, and drying it in a spray dryer to obtain a corrosion-resistant powder.

3. The preparation method of the super corrosion-resistant photovoltaic pipe pile material according to claim 2, wherein In S22, the stirring line speed of the stirrer is controlled at 12-40 m / s; in S23, stirring is continued during the spray coating process, and the stirring line speed is also controlled at 12-40 m / s.

4. The preparation method of the super corrosion-resistant photovoltaic pipe pile material according to claim 2, wherein In S23, the inlet temperature of the spray dryer is 200-245°C, and the outlet temperature is 85-100°C.

5. The preparation method of the super corrosion-resistant photovoltaic pipe pile material according to any one of claims 1-4, characterized in that The particle size of the corrosion-resistant powder is 100-350 μm.

6. The preparation method of the super corrosion-resistant photovoltaic pipe pile material according to claim 1, characterized in that The raw materials of the base material, measured by weight, include 310 parts of cement, 135 parts of water, 712 parts of gravel, 28 parts of carbon fiber powder and 4 parts of retarder; the raw materials of the corrosion-resistant powder, measured by weight, include 13 parts of silica sand, 11 parts of chromate, 9 parts of silicone microsphere powder, 11 parts of water-soluble polymer and 15 parts of water; the raw materials of the compatible powder, measured by weight, include 45 parts of quicklime powder and 12 parts of air entraining agent.

7. The preparation method of the super corrosion-resistant photovoltaic pipe pile material according to claim 1, characterized in that, The specific operation steps of S1 are as follows: S11. First, add cement, water and gravel into a mixer and stir for 15-25 minutes at a linear speed of 15-30 m / s; S12. Then, add carbon fiber powder and retarder into the mixer in sequence, and stir at a linear velocity of 7-12 m / s for 3-5 minutes to obtain the base material.

8. The preparation method of the super corrosion-resistant photovoltaic pipe pile material according to claim 1, characterized in that, The compatible powder obtained in S3 shall be put into S4 for preparing the mixture within 10 minutes after its preparation.

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