A method for manufacturing a high-sealing concrete pole

Abstract

The application discloses a kind of high sealing concrete pole production methods, by mixing and dispersing nanometer silicon dioxide and silane coupling agent, obtain activated nanomaterial;Silicate cement, microsilica, activated nanomaterial, lignin glass polymer composite material and permeable crystalline waterproofing agent are added to the mixer, mixed and stirred uniformly, to obtain mixed dry materials;Water reducing agent, silicone hydrophobic agent are dissolved in part of water to form a mixed solution, then the mixed solution is added to the mixer and stirred, then the aggregate is added to the mixer and stirred, and the remaining water, steel fiber and polystyrene fiber are added and stirred until there are no clumps, to obtain concrete slurry;The concrete slurry is transferred to the pole mold, the centrifuge is started to centrifuge at low speed, medium speed and high speed, and the attached vibrator is used to vibrate and stir simultaneously at the high-speed centrifugation stage, then it is left to stand, temperature controlled and maintained, to obtain a high sealing concrete pole. The corrosion resistance and mechanical strength of the pole are improved.

Description

Technical Field

[0001] This application relates to the field of concrete building materials technology, and more particularly to the field of IPC B28D, specifically to a method for manufacturing a high-density concrete pole. Background Technology

[0002] In coastal areas, power transmission and distribution poles are exposed to harsh environments with high salinity and humidity for extended periods. Salt spray and alkaline substances carried by sea breezes continuously corrode the surface of the poles, leading to reduced structural strength and durability, thus shortening their service life. Furthermore, coastal areas are prone to typhoons, which frequently cause poles to break and collapse.

[0003] Traditional utility poles are mostly made of concrete or metal. Concrete poles are prone to carbonation and chloride ion penetration in saline-alkali environments, leading to steel reinforcement corrosion and expansion, which in turn causes the concrete to crack and peel off. Metal poles are susceptible to electrochemical corrosion, forming a rust layer on the surface, which seriously affects their mechanical properties. Although existing technologies use anti-corrosion coatings to improve the corrosion resistance of utility poles, these coatings are prone to aging and peeling off under long-term marine climate conditions. Summary of the Invention

[0004] This application provides a method for manufacturing a high-sealing concrete pole to solve the technical problems of poor corrosion resistance and mechanical strength of traditional poles.

[0005] To address the aforementioned technical problems, in a first aspect, this application provides a method for manufacturing a high-sealing concrete pole. The high-sealing concrete pole comprises the following raw materials in the indicated weight percentages: silicate cement 15%–25%; microsilica powder 5%–10%; nano-silica 1%–2%; lignin-based glass polymer composite material 1%–3%; silane coupling agent 0.05%–0.25%; aggregate 45%–55%; steel fiber 0.3%–0.8%; polystyrene fiber 0.1%–0.3%; penetrating crystalline waterproofing agent 1%–1.5%; organosilicon water-repellent agent 0.3%–0.6%; water-reducing agent 1%–2%; and water 5%–15%.

[0006] The method for manufacturing the high-sealing concrete pole includes the following steps:

[0007] Step 1: Premix and disperse nano-silica with silane coupling agent for 5 min to 10 min to obtain activated nanomaterials;

[0008] Step 2: Add silicate cement, microsilica powder, activated nanomaterials, lignin-based glass polymer composite material and penetrating crystalline waterproofing agent to the mixer, mix and stir evenly to obtain a mixed dry material;

[0009] Step 3: Dissolve the water-reducing agent and organosilicon water-repellent agent in some water to form a mixture. Then add the mixture to the mixer and stir for 1 to 3 minutes. Add the aggregate to the mixer and stir for 3 to 5 minutes. Add the remaining water, steel fiber and polystyrene fiber and stir until there are no lumps to obtain concrete slurry.

[0010] Step 4: Transfer the concrete slurry to a pole mold with a support structure at a temperature of 50℃. Start the centrifuge and centrifuge at low speed (200-300 rpm), medium speed (600-800 rpm), and high speed (1200-1500 rpm) for 1-3 minutes each. Simultaneously vibrate the material with an attached vibrator at 6000-8000 Hz during the high-speed centrifugation stage. After standing for 1-2 hours, raise the pole mold to 75℃ and maintain the temperature for 8-10 hours. Then cool it to room temperature for demolding. After demolding, spray with diluted organosilicon water-repellent agent and cure for 24-36 hours. Finally, transfer it to a cool curing room for continuous curing for 21 days to obtain a highly sealed concrete pole.

[0011] In some of these embodiments, the total amount of silicate cement, microsilica powder and nano silica is used in a mass ratio of 1:(0.25 to 0.35) to water.

[0012] In some embodiments, the lignin-based glass polymer composite material is a biomass-based polyhydroxy polyurethane glass polymer material synthesized by Professor Zhao Wei's research group at Shaanxi University of Science and Technology via a highly efficient addition polymerization reaction between a bis-six-membered ring carbonate and biomass diamine Priamine1074 at ACS AMI. Studies have found that the lignin-based glass polymer composite material possesses excellent shape memory properties and ultrafast self-healing properties, improving the self-repair capability of the cementitious material system, reducing microcracks, and thus increasing the strength of the pole.

[0013] In some embodiments, the aggregate comprises 20%–25% basalt crushed stone and 15%–20% quartz sand, wherein the basalt crushed stone has a particle size of 5 mm–15 mm and the quartz sand has a fineness modulus of 2.6–3.0.

[0014] In some of the embodiments, the premixing ratio of nano-silica to silane coupling agent in step one is 1:(0.05~0.1).

[0015] In some embodiments, the steel fibers in step three are sprinkled in three stages, with the polystyrene fibers added last.

[0016] In some of these embodiments, the dilution ratio of the organosilicon hydrophobic agent in step four is 10% to 15%.

[0017] In some embodiments, the crystalline waterproofing agent includes one or both of silicate-based waterproofing agents and active silica composite waterproofing agents.

[0018] In some embodiments, the organosilicon hydrophobic agent comprises one or both of alkylalkoxysilanes or modified polysiloxanes.

[0019] In some of the embodiments, the water-reducing agent is a polycarboxylate-based water-reducing agent.

[0020] Compared with the prior art, this application has at least the following beneficial effects:

[0021] By utilizing the self-healing ability of lignin-based glass polymer composites, the self-healing ability of the cementitious material system is improved, optimizing interfacial adhesion and ensuring structural stability. The addition of nano-silica, microsilica powder, and penetrating crystalline waterproofing agents significantly enhances the density of concrete, reduces porosity, and effectively blocks the penetration of moisture, chloride ions, and salt spray, thus enhancing the durability of the poles in coastal high-salt and alkaline environments. The composite incorporation of steel fibers and polystyrene fibers forms a three-dimensional reinforcing network, inhibiting concrete shrinkage cracking and improving impact resistance and mechanical strength. The internal incorporation of organosilicon hydrophobic agents and surface spraying form a double hydrophobic barrier, reducing water absorption and delaying environmental erosion. Silane coupling agents improve the dispersibility of nanomaterials and enhance the modification effect. Stepped centrifugal molding combined with high-frequency vibration ensures uniform and dense concrete, avoiding delamination defects. Segmented temperature-controlled curing promotes hydration reactions, shortens the molding cycle, and improves early strength. This application uses readily available raw materials, has a controllable process, balances high performance and cost-effectiveness, is suitable for large-scale production, significantly extends the service life of the poles, and reduces maintenance costs. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described in detail below. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0023] As used herein, the terms “prepared from” and “comprising” are synonymous. The terms “comprising,” “including,” “having,” “containing,” or any other variations thereof, as used herein, are intended to cover non-exclusive inclusion. For example, a composition, step, method, article, or apparatus that includes the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article, or apparatus.

[0024] When a quantity, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper and lower preferred values, this should be understood as specifically disclosing all ranges formed by any pair of any upper or preferred value with any lower or preferred value, regardless of whether the range is disclosed individually. For example, when the range “1 to 5” is disclosed, the described range should be interpreted as including the ranges “1 to 4”, “1 to 3”, “1 to 2”, “1 to 2 and 4 to 5”, “1 to 3 and 5”, etc. When numerical ranges are described herein, unless otherwise stated, the range is intended to include its endpoints and all integers and fractions within that range.

[0025] Furthermore, the indefinite articles “a” and “an” preceding the elements or components of this invention do not impose any limitation on the quantity requirement (i.e., the number of times) of the elements or components. Therefore, “an” or “a” should be interpreted as including one or at least one, and the singular form of an element or component also includes the plural form, unless the quantity clearly refers to the singular form.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] In the following examples, the silane coupling agent is KH-570, the penetrating crystalline waterproofing agent is Krystol T1, and the organosilicon hydrophobic agent is... Taking HE 328 as an example, the water-reducing agent is... For example, ViscoCrete-20HE.

[0028] Example 1

[0029] A method for manufacturing a high-sealing concrete pole, comprising the following raw materials by weight percentage: 20% silicate cement; 10% microsilica powder; 2% nano-silica; 1% lignin-based glass polymer composite material; 0.2% silane coupling agent; 30% basalt crushed stone; 15% quartz sand; 0.3% steel fiber; 0.1% polystyrene fiber; 1.5% penetrating crystalline waterproofing agent; 0.6% organosilicon water-repellent agent; 1% water-reducing agent; and 8.3% water.

[0030] The method for manufacturing the high-sealing concrete pole includes the following steps:

[0031] Step 1: Premix and disperse nano-silica with silane coupling agent for 8 minutes to obtain activated nanomaterials;

[0032] Step 2: Add silicate cement, microsilica powder, activated nanomaterials, lignin-based glass polymer composite material and penetrating crystalline waterproofing agent to the mixer, mix and stir evenly to obtain a mixed dry material;

[0033] Step 3: Dissolve the water-reducing agent and organosilicon water-repellent agent in some water to form a mixture. Then add the mixture to the mixer and stir for 2 minutes. Add the aggregate to the mixer and stir for 4 minutes. Add the remaining water and sprinkle the steel fiber in three batches. Add the polystyrene fiber last and stir until there are no lumps to obtain the concrete slurry.

[0034] Step 4: Transfer the concrete slurry to a sample mold at 50℃. Start the centrifuge and centrifuge at low speed of 250r / min, medium speed of 700r / min, and high speed of 1200r / min for 2 minutes each. Simultaneously vibrate the sample at 8000Hz using an attached vibrator during the high-speed centrifugation stage. After standing for 1 hour, raise the temperature of the pole mold to 75℃ and maintain it for 8 hours. Then cool it to room temperature and demold. After demolding, spray the surface with a 10% diluted organosilicon water-repellent agent (not included in the pole component content). Cure for 24 hours. Finally, transfer the sample to a cool curing room (23±2℃, RH≥90%) for continuous curing for 21 days to obtain a high-sealing concrete pole.

[0035] Example 2

[0036] A method for manufacturing a high-sealing concrete pole, comprising the following raw materials by weight percentage: 25% silicate cement; 8% microsilica powder; 1.5% nano-silica; 2% lignin-based glass polymer composite material; 0.12% silane coupling agent; 35% basalt crushed stone; 15% quartz sand; 0.5% steel fiber; 0.2% polystyrene fiber; 1.2% penetrating crystalline waterproofing agent; 0.4% organosilicon water-repellent agent; 1.5% water-reducing agent; and 9.58% water.

[0037] The method for manufacturing the high-sealing concrete pole includes the following steps:

[0038] Step 1: Premix and disperse nano-silica with silane coupling agent for 10 min to obtain activated nanomaterials;

[0039] Step 2: Add silicate cement, microsilica powder, activated nanomaterials, lignin-based glass polymer composite material and penetrating crystalline waterproofing agent to the mixer, mix and stir evenly to obtain a mixed dry material;

[0040] Step 3: Dissolve the water-reducing agent and organosilicon water-repellent agent in some water to form a mixture. Then add the mixture to the mixer and stir for 3 minutes. Add the aggregate to the mixer and stir for 3 minutes. Add the remaining water, steel fiber and polystyrene fiber and stir until there are no lumps to obtain concrete slurry.

[0041] Step 4: Transfer the concrete slurry to a sample mold at 50°C. Start the centrifuge and centrifuge at 200r / min (low speed), 800r / min (medium speed), and 1500r / min (high speed) for 1 minute each. Simultaneously vibrate the sample at 7000Hz using an attached vibrator during the high-speed centrifugation stage. After standing for 2 hours, raise the temperature of the pole mold to 75°C and maintain it for 10 hours. Then, cool it to room temperature and demold. After demolding, spray the surface with a 12% diluted organosilicon water-repellent agent and cure for 36 hours. Finally, transfer the sample to a cool curing room for continuous curing for 21 days to obtain a high-sealing concrete pole.

[0042] Example 3

[0043] A method for manufacturing a high-sealing concrete pole, comprising the following raw materials by weight percentage: 30% silicate cement; 5% microsilica powder; 1% nano-silica; 3% lignin-based glass polymer composite material; 0.05% silane coupling agent; 25% basalt crushed stone; 20% quartz sand; 0.8% steel fiber; 0.3% polystyrene fiber; 1% penetrating crystalline waterproofing agent; 0.3% organosilicon water-repellent agent; 2% water-reducing agent; and 11.55% water.

[0044] The method for manufacturing the high-sealing concrete pole includes the following steps:

[0045] Step 1: Premix and disperse nano-silica with silane coupling agent for 5 minutes to obtain activated nanomaterials;

[0046] Step 2: Add silicate cement, microsilica powder, activated nanomaterials, lignin-based glass polymer composite material and penetrating crystalline waterproofing agent to the mixer, mix and stir evenly to obtain a mixed dry material;

[0047] Step 3: Dissolve the water-reducing agent and organosilicon water-repellent agent in some water to form a mixture. Then add the mixture to the mixer and stir for 1 minute. Add the aggregate to the mixer and stir for 5 minutes. Add the remaining water, steel fiber and polystyrene fiber and stir until there are no lumps to obtain concrete slurry.

[0048] Step 4: Transfer the concrete slurry to a sample mold at 50°C. Start the centrifuge and centrifuge at low speed (300 r / min), medium speed (600 r / min), and high speed (1300 r / min) for 1-3 minutes each. Simultaneously vibrate the sample at 6000 Hz using an attached vibrator during the high-speed centrifugation stage. After standing for 1.5 hours, heat the pole mold to 75°C and maintain the temperature for 9 hours. Then cool it to room temperature and demold. After demolding, spray the surface with a 15% diluted organosilicon water-repellent agent and cure for 30 hours. Finally, transfer the sample to a cool curing room for continuous curing for 21 days to obtain a high-sealing concrete pole.

[0049] Comparative Example 1

[0050] Compared with Example 1, Comparative Example 1 does not contain lignin-based glass polymer composite material.

[0051] Comparative Example 2

[0052] Compared to Example 1, Comparative Example 2 did not contain a silane coupling agent.

[0053] Comparative Example 3

[0054] Compared with Example 1, Comparative Example 3 used an equal amount of chloride-containing waterproofing agent (calcium chloride) instead of penetrating crystalline waterproofing agent.

[0055] Comparative Example 4

[0056] Compared with Example 1, Step 4 of Comparative Example 4 does not use an attached vibrator for synchronous compaction.

[0057] Comparative Example 5

[0058] Compared with Example 1, Comparative Example 5 was demolded directly after step four, which involved letting the sample stand for 1 hour.

[0059] Performance testing

[0060] Test samples: Concrete samples prepared using the sample molds of Examples 1 to 3 and Comparative Examples 1 to 5.

[0061] Test methods: Compressive and tensile strength tests were conducted according to GB / T 50081-2019; permeability tests were conducted according to GB 50164-92; and chloride corrosion resistance tests were conducted according to the electrical flux method in GB / T 50082-2009. The test results are shown in Table 1 below.

[0062] Table 1. Test results of samples from Examples 1 to 3 and Comparative Examples 1 to 5.

[0063] sample compressive strength (MPa) Tensile strength (MPa) impermeability grade Electric flux C Example 1 124.1 13.2 ＞P12 38.9 Example 2 128.6 14.4 ＞P12 47.1 Example 3 136.4 16.3 ＞P12 40.5 Comparative Example 1 79.8 7.1 P8 412.6 Comparative Example 2 95.4 9.9 P12 106.9 Comparative Example 3 74.7 6.4 P4 895.3 Comparative Example 4 101.5 10.3 P10 236.7 Comparative Example 5 112.8 11.9 ＞P12 58.4

[0064] As shown in Table 1, the samples prepared in Examples 1 to 3 all exhibited good performance in compressive strength, tensile strength, impermeability grade, and electrical flux. When the electrical flux was below 100°C, it fell within the range where chloride ion penetration was negligible, indicating excellent corrosion resistance. Compared to Example 1, the mechanical strength and impermeability of Comparative Example 1 (without lignin-based glass polymer composite material) were significantly reduced; the mechanical strength of Comparative Example 2 (without silane coupling agent) was also reduced; the mechanical strength and impermeability of Comparative Example 3 (using calcium chloride as a waterproofing agent) were significantly worse; and the mechanical strength of Comparative Example 4 (without vibration) and Comparative Example 5 (without heat curing) were also reduced.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application for those skilled in the art.

Claims

1. A method for manufacturing a high-sealing concrete utility pole, characterized in that, High-sealing concrete poles consist of the following raw materials by weight percentage: silicate cement 20%–30%; microsilica 5%–10%; nano silica 1%–2%; biomass-based polyhydroxy polyurethane glass polymer material 1%–3%; silane coupling agent 0.05%–0.25%; aggregate 45%–55%; steel fiber 0.3%–0.8%; polystyrene fiber 0.1%–0.3%; penetrating crystalline waterproofing agent 1%–1.5%; organosilicon water-repellent agent 0.3%–0.6%; water-reducing agent 1%–2%; water 5%–15%. The method for manufacturing the high-sealing concrete pole includes the following steps: Step 1: Premix and disperse nano-silica with silane coupling agent for 5 min to 10 min to obtain activated nanomaterials; Step 2: Add silicate cement, microsilica powder, activated nanomaterials, biomass-based polyhydroxy polyurethane glass polymer and penetrating crystalline waterproofing agent to the mixer, mix and stir evenly to obtain a mixed dry material; Step 3: Dissolve the water-reducing agent and organosilicon water-repellent agent in some water to form a mixture. Then add the mixture to the mixer and stir for 1 to 3 minutes. Add the aggregate to the mixer and stir for 3 to 5 minutes. Add the remaining water, steel fiber and polystyrene fiber and stir until there are no lumps to obtain concrete slurry. Step 4: Transfer the concrete slurry to a pole mold with a support structure at a temperature of 50℃. Start the centrifuge and centrifuge at low speed (200-300 rpm), medium speed (600-800 rpm), and high speed (1200-1500 rpm) for 1-3 minutes each. Simultaneously vibrate the material with an attached vibrator at 6000-8000 Hz during the high-speed centrifugation stage. After standing for 1-2 hours, raise the pole mold to 75℃ and maintain the temperature for 8-10 hours. Then cool it to room temperature for demolding. After demolding, spray with diluted organosilicon water-repellent agent and cure for 24-36 hours. Finally, transfer it to a cool curing room for continuous curing for 21 days to obtain a highly sealed concrete pole.

2. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, The total amount of silicate cement, microsilica powder and nano silica used is in a mass ratio of 1:(0.25 to 0.35) to water.

3. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, The biomass-based polyhydroxy polyurethane glass polymer material is synthesized by a highly efficient addition polymerization reaction between a bis-six-membered ring carbonate and biomass diamine Priamine1074.

4. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, The aggregate comprises 25%–35% basalt crushed stone and 15%–20% quartz sand. The particle size of the basalt crushed stone is 5 mm–15 mm, and the fineness modulus of the quartz sand is 2.6–3.

6. The mass percentage of the basalt crushed stone and the quartz sand is measured according to the raw material composition of the concrete pole, and the sum of the mass percentages of the basalt crushed stone and the quartz sand is 45%–55%.

5. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, The premixing ratio of nano-silica to silane coupling agent in step one is 1:(0.05~0.1).

6. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, In step three, the steel fibers are sprinkled in three stages, and the polystyrene fibers are added last.

7. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, The dilution ratio of the organosilicon hydrophobic agent in step four is 10% to 15%.

8. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, The penetrating crystalline waterproofing agent includes one or both of silicate-based waterproofing agents and active silica composite waterproofing agents.

9. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, The organosilicon hydrophobic agent includes one or both of alkylalkoxysilanes or modified polysiloxanes.

10. The method for manufacturing a high-sealing concrete pole as described in claim 1, characterized in that, The water-reducing agent is a polycarboxylate-based water-reducing agent.