A method for manufacturing concrete utility poles
By improving the composition and molding process of the reinforcing steel cage and casting materials, the problems of internal and external delamination and excess grout in concrete poles were solved, thereby improving molding quality and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- ANSHAN WANGXIN ELECTRIC POWER TECHNOLOGY CO LTD
- Filing Date
- 2026-04-27
- Publication Date
- 2026-06-02
AI Technical Summary
Existing methods for manufacturing concrete poles suffer from problems such as internal and external delamination, poor molding quality, excessive residual slurry, material waste, and high production costs.
High-strength steel reinforcement and a specific ratio of cementitious materials, aggregates and admixtures are used to prepare casting materials, which are then formed into high-quality concrete poles through static molding and steam curing.
It improves the crack resistance, toughness, density and durability of concrete poles, reduces material waste and lowers production costs.
Smart Images
Figure CN122127113A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of building materials and products technology, specifically a method for manufacturing concrete utility poles. Background Technology
[0002] Concrete poles are widely used as support structures for overhead power, communication, and lighting lines. Currently, the mainstream products are mostly reinforced concrete poles. Their structure generally includes a steel reinforcement cage and a poured concrete outer layer. The steel reinforcement cage is welded together from the support ring, main bars, and spiral bars. After the steel reinforcement cage is formed, it is placed between the inner and outer steel molds, and concrete is poured in. After centrifugal molding, the steel reinforcement cage is embedded in the concrete, and the concrete and the steel reinforcement cage form a whole, thus forming a concrete pole. Centrifugal molding is the core process in the production of prestressed concrete poles. It achieves the compaction of concrete through high-speed centrifugal force. The specific process is as follows: 1. Preparation of steel wire frame: forming the load-bearing frame of the pole; 2. Concrete pouring: Pour concrete mixture into the steel mold to fill the gaps in the framework; 3. Centrifugal molding: Start the centrifuge, and the steel mold rotates at high speed (speed can reach 100-300 rpm). The centrifugal force squeezes out the excess water in the concrete, making the concrete evenly and densely distributed, and the concrete and the steel reinforcement skeleton form a whole. This molding method has the following shortcomings: 1. Concrete segregation may occur: During the centrifugation process, the different components of concrete are prone to segregation due to their different densities, which affects the uniformity of mechanical properties and reduces durability; 2. Generates a large amount of residual slurry: Centrifugation produces a lot of cement slurry waste, resulting in material waste and environmental pressure; 3. Large quantities of steel bars are used, resulting in high costs; 4. Insufficient environmental friendliness: Concrete has a high proportion of natural aggregates and a large amount of cement in cementitious materials, which not only consumes a lot of resources but also has high carbon emissions. Summary of the Invention
[0003] In view of the above-mentioned shortcomings in the related technologies, the purpose is to provide a method for manufacturing concrete poles to solve the technical problems of easy internal and external delamination, poor molding quality, excessive residual slurry, resulting in material waste and high production costs in the related technologies. The technical solution to achieve the objective is: a method for manufacturing concrete utility poles, comprising the following steps: Step 1. Preparation of the steel reinforcement cage; Step 2. Preparation of casting material: The casting material includes: cementitious material, aggregate, admixture, and water. The cementitious material is 10 parts, the aggregate is 16-30 parts, the admixture is 1.5%-3% of the total amount of the cementitious material and the aggregate, and the water is 16%-22% of the amount of the cementitious material. The cementitious material comprises the following components: 25%-40% P.O42.5 cement and 60%-75% mineral admixtures. The aggregate comprises the following components: 0%-30% recycled coarse aggregate from construction waste, 20%-40% fine aggregate from steel slag, 20%-40% iron ore tailings, and 20%-30% manufactured sand; Step 3. Casting and Molding: After assembling the steel reinforcement cage with the inner and outer steel molds to form a mold cavity, the casting material from Step 2 is poured into the mold cavity and allowed to stand and solidify. Step 4. Performance testing.
[0004] Further: Step one, the preparation of the reinforcing steel cage, includes: welding together the reinforcing steel cage, main bars and spiral bars; And stress tension is applied to the main reinforcement bars on the steel reinforcement cage, with a tension stress of 100MPa-200MPa.
[0005] Furthermore: the main reinforcement bars are HRB500 or HRB600 grade steel bars.
[0006] Furthermore, the mineral admixtures include: S95 grade slag powder, Grade I fly ash, and silica fume.
[0007] Furthermore: the particle size range of the recycled coarse aggregate from construction waste is 3mm-10mm; The particle size range of the steel slag fine aggregate is 0.1mm-5mm; The particle size range of the iron ore tailings is 0.1mm-5mm.
[0008] Furthermore, the admixture is a polycarboxylate high-performance water-reducing agent.
[0009] Furthermore, step two, the preparation of the casting material, further includes: stirring the casting material in a vacuum mixer for 3-8 minutes, with a vacuum degree of -0.06 to -0.08 MPa.
[0010] Furthermore, step three, casting and molding, also includes: using high-frequency vibration until the casting material fills the mold cavity; After standing for 1 hour, steam curing at normal pressure is carried out for 8 hours. After demolding, water curing is carried out for 14 days.
[0011] Further: Step four, performance testing, includes: smooth appearance, no visible bubbles, and wall thickness deviation ≤ 0.8 mm; The measured compressive strength of the concrete is 90MPa-120MPa, and the elastic modulus is 38GPa-45GPa.
[0012] The above technical solution has the following beneficial effects: A method for manufacturing concrete poles, compared with related technologies, includes the following steps: Step 1. Preparation of the steel reinforcement cage; Step 2. Preparation of casting material: The casting material includes: cementitious material, aggregate, admixture, and water. The cementitious material is 10 parts, the aggregate is 16-30 parts, the admixture is 1.5%-3% of the total amount of the cementitious material and the aggregate, and the water is 16%-22% of the amount of the cementitious material. The cementitious material comprises the following components: 25%-40% P.O42.5 cement and 60%-75% mineral admixtures. The aggregate comprises the following components: 0%-30% recycled coarse aggregate from construction waste, 20%-40% fine aggregate from steel slag, 20%-40% iron ore tailings, and 20%-30% manufactured sand; Step 3. Casting and Molding: After assembling the steel reinforcement cage with the inner and outer steel molds to form a mold cavity, the casting material from Step 2 is poured into the mold cavity and allowed to stand and solidify. Step 4. Performance Testing; Because the cementitious material consists of 70% mineral admixtures and 30% P.O42.5 cement, the amount of cement used is reduced. Furthermore, solid waste is used as aggregate, making full use of various waste residues, improving the utilization rate of solid waste resources, reducing the consumption of natural aggregates (such as river sand, valley sand, etc.), and no residual slurry waste is generated, reducing material waste. The molding quality is relatively good, improving the crack resistance, toughness, density and durability of concrete poles, and reducing production costs. This overcomes the technical problems of easy internal and external delamination, poor molding quality, excessive residual slurry, resulting in material waste and high production costs, and achieves the technical effect of relatively good molding quality, reduced material waste, and lower production costs. Attached Figure Description
[0013] Figure 1 This is a flowchart illustrating the method. Figure 2 This is a structural diagram of the steel reinforcement cage, inner steel mold, and outer steel mold in steps one and three. Figure 3 for Figure 2 Partial sectional view after assembly; Figure 4 This is a structural schematic diagram of a steel reinforcement cage; In the diagram: 100. Reinforcing steel cage, 101. Support ring, 102. Main reinforcement, 103. Spiral reinforcement, 104. Spacer block, 200. Inner steel mold, 300. Outer steel mold, 301. Pouring port, 400. Mold cavity. Detailed Implementation
[0014] To make the content easier to understand, the following detailed description is provided with reference to specific embodiments and accompanying drawings; A method for manufacturing concrete utility poles solves the technical problems of easy internal and external delamination, poor molding quality, excessive slurry residue, resulting in material waste and high production costs in related technologies. This method achieves relatively better molding quality, reduces material waste, and lowers production costs. The overall approach is as follows: Implementation Method
[0015] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown; a method for manufacturing a concrete utility pole, comprising the following steps: Step 1. Preparation of the steel reinforcement cage 100, including: welding together the support ring 101, main reinforcement 102 and spiral reinforcement 103 to form the steel reinforcement cage 100; And stress tension is applied to the main reinforcement 102 on the steel reinforcement cage 100, with a tension stress of 100MPa-200MPa, preferably 180MPa; The stress tensioning uses a tensioning machine in the existing technology. The main reinforcement 102 is kept in a tensioned state and ready for use, so that the steel cage 100 remains straight and will not bend. After seeing the disclosed content, a person skilled in the art can directly and without doubt know how to set it up, without having to do creative work or conduct excessive experiments. The main reinforcement 102 is HRB500 or HRB600 grade steel bar, such as hot-rolled ribbed steel bar with a diameter of 10mm. High-strength hot-rolled ribbed steel bar is used, which reduces the amount of steel bar used. Step 2. Preparation of casting material: The casting material includes: cementitious material, aggregate, admixture, and water. The cementitious material is 10 parts, the aggregate is 16-30 parts, the admixture is 1.5%-3% of the total amount of the cementitious material and the aggregate, and the water is 16%-22% of the amount of the cementitious material. The cementitious material comprises the following components: 25%-40% P.O42.5 cement and 60%-75% mineral admixtures. The aggregate comprises the following components: 0%-30% recycled coarse aggregate from construction waste, 20%-40% fine aggregate from steel slag, 20%-40% iron ore tailings, and 20%-30% manufactured sand; The mineral admixtures include: S95 grade slag powder, Grade I fly ash, and silica fume; For example: a total of 1000 catties of cementitious materials are needed, 300 catties of P.O42.5 cement and 700 catties of mineral admixtures are needed; For example: the S95 grade slag powder accounts for 4 parts, the grade I fly ash accounts for 2 parts, the silica fume accounts for 1 part, and in the mineral admixture, the S95 grade slag powder accounts for 400 catties, the grade I fly ash accounts for 200 catties, and the silica fume accounts for 100 catties. The particle size range of the recycled coarse aggregate from construction waste is 3mm-10mm. The recycled coarse aggregate from construction waste is obtained by crushing and processing waste concrete blocks generated from building demolition, road resurfacing, engineering construction and other situations, thereby reducing the consumption of natural aggregates (such as river sand, valley sand, etc.). The particle size range of the steel slag fine aggregate is 0.1mm-5mm; The particle size range of the iron ore tailings is 0.1mm-5mm; For example: a total of 2,000 catties of aggregate is needed, including 400 catties of recycled coarse aggregate from construction waste, 400 catties of fine aggregate from steel slag, 600 catties of iron ore tailings, and 600 catties of artificial sand. The admixture is 1.5%-3% of the total amount of the cementitious material and the aggregate, preferably 2%. The admixture is a polycarboxylate high-performance water-reducing agent. Therefore, since a total of 1,000 catties of cementitious material and 2,000 catties of aggregate are needed, the admixture is 60 catties. The water content is 16%-22% of the amount of cementitious material, preferably 20%. Since a total of 1000 catties of cementitious material and 200 catties of water are required, the amount of water needs to be adjusted according to the fluidity of the casting material. The data here is only a reference value and is common knowledge. The process also includes: mixing the casting material in a vacuum mixer for 3-8 minutes, with a vacuum degree of -0.06 to -0.08 MPa, preferably -0.07 MPa, to remove air trapped in the casting material, reduce air bubbles in the casting material, improve density and homogeneity, thereby improving strength and impermeability. At the same time, it makes the surface of the formed concrete pole smoother and has relatively fewer air bubble defects. Because the cementitious material consists of 70% mineral admixtures and 30% P.O42.5 cement, the amount of cement used is reduced, improving durability. Furthermore, the aggregates are made from solid waste, making full use of various waste residues, improving the resource utilization rate of solid waste, and reducing the consumption of natural aggregates (such as river sand and valley sand), which is relatively environmentally friendly. Moreover, it does not generate residual slurry waste, reducing material waste. The molding quality is relatively good, improving the crack resistance, toughness, density, and durability of concrete poles, and reducing production costs by 25%. Step 3. Casting and Molding: Assemble the reinforcing steel skeleton 100 with the inner steel mold 200 and the outer steel mold 300. Use several spacers 104 to place between the reinforcing steel skeleton 100 and the inner steel mold 200 to adjust the gap between the reinforcing steel skeleton 100 and the inner steel mold 200 and to position the reinforcing steel skeleton 100. After assembly, a mold cavity 400 is formed between the inner steel mold 200 and the outer steel mold 300. Pour the casting material from Step 2 into the mold cavity 400 through the pouring port 301 on the outer steel mold 300. Use high-frequency vibration (using a high-frequency vibrator) until the casting material fills the mold cavity 400. The casting material wraps the reinforcing steel skeleton 100 and the spacers 104. After standing for 1 hour, it is formed. Perform normal pressure steam curing for 8 hours. After demolding (demolding means opening the outer steel mold 300 and removing the inner steel mold 200), water is sprinkled (water is sprinkled on the concrete pole) for curing for 14 days. Step 4. Performance testing, including: smooth appearance, no visible bubbles, and wall thickness deviation ≤ 0.8mm; The measured compressive strength of the concrete is 90MPa-120MPa, and the elastic modulus is 38GPa-45GPa. Performance testing is generally conducted in accordance with the standard GB / T 4623-2006 Ring Concrete Poles, which is common knowledge and not the inventive point of this invention. It is only used to better describe this invention and facilitate understanding of the technical solution of this invention. Those skilled in the art can directly and without doubt know how to set it up after seeing the disclosed content, without needing to expend creative labor or conduct excessive experiments. Structures in the prior art: like Figure 2 , Figure 3 , Figure 4As shown; in implementation, the reinforcing steel cage 100, inner steel mold 200, and outer steel mold 300 are common structures in the prior art. The reinforcing steel cage 100 is welded together from the support ring 101, main reinforcement 102, and spiral reinforcement 103. The inner steel mold 200 is a conical hollow tube, and the outer steel mold 300 is composed of two mold bodies that are split open and connected to each other by bolts. This facilitates assembly with the reinforcing steel cage 100, the pad block 104, and the inner steel mold 200, making assembly relatively convenient. After assembly, the inner steel mold 200 and the outer steel mold 300... A cavity 400 is formed between the steel molds 300. Casting material is poured into the cavity 400 through the pouring port 301 on the outer steel mold 300. The casting material covers the steel reinforcement skeleton 100 and the spacer block 104. After standing, a concrete pole is formed. Anyone skilled in the art, after seeing the disclosed content, can directly and without doubt know how to set up the steel reinforcement skeleton 100, the inner steel mold 200 and the outer steel mold 300, without needing to expend creative labor or conduct excessive experiments. In the description, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicate the orientation or positional relationship based on the positional relationship shown in the accompanying drawings. They are only for the convenience or simplification of the description and do not indicate a specific orientation that must be present. The operation process described in the embodiments is not an absolute usage step, and corresponding adjustments can be made in actual use. Unless otherwise defined, the technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art; the words “first,” “second,” and similar terms used in the specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components, and similarly, the words “a” or “a” and similar terms do not determine a quantity limitation, but rather indicate the presence of at least one, as determined by the content of the embodiments; The above description is only a preferred embodiment, but the scope of protection is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art based on the technical solution and inventive concept within the scope of the technology disclosed should be included within the scope of protection.
Claims
1. A method for manufacturing a concrete utility pole, characterized in that, Includes the following steps: Step 1. Preparation of the steel reinforcement cage; Step 2. Preparation of casting material: The casting material includes: cementitious material, aggregate, admixture, and water. The cementitious material is 10 parts, the aggregate is 16-30 parts, the admixture is 1.5%-3% of the total amount of the cementitious material and the aggregate, and the water is 16%-22% of the amount of the cementitious material. The cementitious material comprises the following components: 25%-40% P.O42.5 cement and 60%-75% mineral admixtures. The aggregate comprises the following components: 0%-30% recycled coarse aggregate from construction waste, 20%-40% fine aggregate from steel slag, 20%-40% iron ore tailings, and 20%-30% manufactured sand; Step 3. Casting and Molding: After assembling the steel reinforcement cage with the inner and outer steel molds to form a mold cavity, the casting material from Step 2 is poured into the mold cavity and allowed to stand and solidify. Step 4. Performance testing.
2. The method for manufacturing a concrete utility pole according to claim 1, characterized in that: Step 1, the preparation of the reinforcing steel cage, includes: welding together the reinforcing steel cage, main bars, and spiral bars; And stress tension is applied to the main reinforcement bars on the steel reinforcement cage, with a tension stress of 100MPa-200MPa.
3. The method for manufacturing a concrete utility pole according to claim 1, characterized in that: The main reinforcement bars are HRB500 or HRB600 grade steel bars.
4. The method for manufacturing a concrete utility pole according to claim 1, characterized in that: The mineral admixtures include: S95 grade slag powder, Grade I fly ash, and silica fume.
5. The method for manufacturing a concrete utility pole according to claim 4, characterized in that: The particle size range of the recycled coarse aggregate from construction waste is 3mm-10mm; The particle size range of the steel slag fine aggregate is 0.1mm-5mm; The particle size range of the iron ore tailings is 0.1mm-5mm.
6. The method for manufacturing a concrete utility pole according to claim 1, characterized in that: The additive is a polycarboxylate high-performance water-reducing agent.
7. A method for manufacturing a concrete utility pole according to claim 5, characterized in that: Step two, the preparation of the casting material, further includes: stirring the casting material in a vacuum mixer for 3-8 minutes, with a vacuum degree of -0.06 to -0.08 MPa.
8. A method for manufacturing a concrete utility pole according to claim 7, characterized in that: Step three, casting and molding, further includes: using high-frequency vibration until the casting material fills the mold cavity; After standing for 1 hour, steam curing at normal pressure is carried out for 8 hours. After demolding, water curing is carried out for 14 days.
9. A method for manufacturing a concrete utility pole according to claim 8, characterized in that: Step four, performance testing, includes: smooth appearance, no visible bubbles, and wall thickness deviation ≤ 0.8mm; The measured compressive strength of the concrete is 90MPa-120MPa, and the elastic modulus is 38GPa-45GPa.