Anti-freezing and anti-seepage concrete pipe pile and production process
By using high-performance materials in concrete pipe piles and optimizing production processes, the problems of insufficient frost resistance and seepage resistance of traditional concrete pipe piles are solved, and significant performance improvement and service life extension are achieved.
Patent Information
- Application Number
- CN202510155345.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-12
- Publication Date
- 2025-06-20
AI Technical Summary
Traditional concrete pipe piles lack frost resistance and permeability in extreme climatic conditions and complex geological environments, resulting in reduced structural strength and durability problems.
High-performance materials such as high-performance silicate cement and nano silica are used, and by optimizing raw material ratio and production process, including vacuum treatment and appropriate amount of gas induction agent, the internal porosity of concrete is reduced, compactness and anti-freeze-thaw circulation ability are improved.
The concrete pipe piles are significantly improved in frost resistance and permeability, making them excellent in multiple freeze-thaw cycles and high-pressure water penetration tests, extending service life and reducing maintenance costs.
Smart Images
Figure CN120172697A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of concrete pipe piles, and particularly to an anti-freezing and anti-seepage concrete pipe pile and a production process thereof. Background Technique
[0002] In the field of construction engineering, concrete pipe piles, as an important basic material, are widely used in projects such as bridges, high-rise buildings, ports, and water conservancy. However, traditional concrete pipe piles often have problems of insufficient anti-freezing and anti-seepage performance when facing extreme climate conditions and complex geological environments. Especially in cold regions, the low temperature in winter can cause the water inside the concrete to freeze and expand, resulting in cracks and a decrease in strength; while in humid or underwater environments, the permeability of concrete pipe piles may lead to the corrosion of steel bars, further affecting the durability and safety of the structure.
[0003] To solve these problems, the industry has been exploring ways to improve the anti-freezing and anti-seepage performance of concrete pipe piles by optimizing the formula and production process. Traditional methods include increasing the cement dosage, using additives such as anti-freezing agents or waterproof agents, but these methods often lead to increased costs, heavier environmental burdens, or limited performance improvement. Therefore, it has become an urgent task to develop an economical and efficient anti-freezing and anti-seepage concrete pipe pile. Summary of the Invention
[0004] The purpose of the present invention is to provide an anti-freezing and anti-seepage concrete pipe pile and a production process thereof to solve the problems raised in the above background technique.
[0005] To achieve the above purpose, the present invention provides the following technical solution: An anti-freezing and anti-seepage concrete pipe pile, the anti-freezing and anti-seepage concrete pipe pile comprises the following components in parts by mass: 45 - 55 parts of high-performance portland cement, 25 - 35 parts of selected fine aggregate, 10 - 15 parts of fly ash microspheres, 2 - 4 parts of nano-silica, 1 - 2 parts of carbon fiber filaments, 0.5 - 1 part of polypropylene fiber, 15 - 20 parts of natural gravel, 3 - 5 parts of high-performance polycarboxylate water reducer, 0.5 - 1 part of air-entraining agent.
[0006] Preferably, the selected fine aggregate is ground sand.
[0007] Preferably, the particle size of the natural gravel is 5 - 20 mm.
[0008] Preferably, the air-entraining agent is a fluoropolymer type air-entraining agent.
[0009] A production process of an anti-freezing and anti-seepage concrete pipe pile, the process comprises the following steps: material mixing, after pre-mixing the raw materials, performing main mixing on the raw materials;
[0010] Introducing an air-entraining agent;
[0011] Vacuum treatment;
[0012] Pipe pile forming and vibration;
[0013] Curing.
[0014] Preferably, the detailed operation of the material mixing is as follows:
[0015] Put dry materials such as high-performance portland cement, selected fine aggregate, fly ash microspheres, nano-silica, carbon fiber filaments, and polypropylene fibers into a premixer for preliminary mixing; add part of the water (30% of the total amount) to moisten the dry materials for subsequent stirring.
[0016] Transfer the premixed materials to the main mixer, add the remaining water and high-performance polycarboxylate water reducer, and carry out high-speed stirring until a uniform concrete mixture with good fluidity is formed.
[0017] Preferably, the specific operation of introducing the air-entraining agent includes: when the concrete mixture is about to be stirred to completion, slowly add a fluoropolymer-type air-entraining agent and continue stirring to evenly disperse the air-entraining agent in the concrete to form stable bubbles.
[0018] Preferably, the specific operation of the vacuum treatment includes: pouring the concrete mixture into a vacuum degassing device for vacuum treatment; the vacuum treatment can further remove the bubbles and excess water in the concrete, improving the density and impermeability.
[0019] Preferably, the specific operation of the pipe pile forming and vibration includes: pouring the concrete mixture after vacuum treatment into a mold; using a high-frequency vibrator to vibrate the mold to discharge the residual bubbles in the concrete and enhance the density.
[0020] Preferably, the specific operation of the curing includes: placing the formed pipe pile in a standard curing room for curing. The curing room should maintain a suitable temperature of 20±2°C and a humidity of more than 95% to promote the hardening of the concrete and the improvement of strength; the curing time is not less than 28 days to ensure that the concrete reaches the design strength.
[0021] Compared with the prior art, the beneficial effects of the present invention are:
[0022] The anti-freezing and anti-seepage concrete pipe pile and production process proposed by the present invention effectively reduce the internal porosity of the concrete and improve the density and freeze-thaw cycle resistance of the concrete by introducing high-performance materials such as high-performance portland cement and nano-silica and reasonably controlling the dosage of the air-entraining agent. The experimental results show that the concrete pipe piles in Examples 1 to 4 can still maintain high strength and integrity after undergoing multiple freeze-thaw cycles.
[0023] By optimizing the raw material ratio, especially increasing the dosage of materials such as fly ash microspheres and polypropylene fibers, and adopting production processes such as vacuum treatment, the microcracks and pores inside the concrete are effectively reduced, and the impermeability of the concrete is improved. Experiments have proved that the concrete pipe piles in the embodiments perform excellently in the high-pressure water penetration test and can effectively prevent the intrusion of moisture and harmful substances.
[0024] Through the comprehensive optimization of the raw material ratio and production process, the concrete pipe piles in the embodiments have shown significant improvements in aspects such as compressive strength, flexural strength, and durability. This not only improves the bearing capacity of the concrete pipe piles but also extends their service life and reduces the maintenance and replacement costs. Brief Description of the Drawings
[0025] Figure 1 It is a flowchart of the method of the present invention. Detailed Embodiments
[0026] In order to clearly and completely describe the objectives, technical solutions of the present invention and make the advantages more clearly understood, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some embodiments of the present invention, rather than all embodiments, and are only used to explain the embodiments of the present invention and are not used to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present invention.
[0027] Embodiment 1, the present invention provides a technical solution: a high-strength frost-resistant and impermeable concrete pipe pile.
[0028] Formula (parts by mass):
[0029] High-performance portland cement: 50 parts
[0030] Ground sand (selected fine aggregate): 30 parts
[0031] Fly ash microspheres: 12 parts
[0032] Nano-silica: 3 parts
[0033] Carbon fiber filaments: 1.5 parts
[0034] Polypropylene fibers: 0.75 parts
[0035] 5 - 20mm natural crushed stone: 17.5 parts
[0036] High-performance polycarboxylate water reducer: 4 parts
[0037] Fluoropolymer type air-entraining agent: 0.75 parts
[0038] Production process:
[0039] Mixing of materials: Put all dry materials into a premixer for preliminary mixing, and add 30% of the total water volume to moisten the dry materials. Then transfer them to the main mixer, add the remaining water and water reducer, and stir at high speed until a uniform mixture is formed.
[0040] Introduction of air-entraining agent: When the mixture is about to be stirred to completion, slowly add a fluoropolymer-based air-entraining agent and continue stirring until the air-entraining agent is evenly dispersed.
[0041] Vacuum treatment: Pour the mixture into a vacuum degassing device for vacuum treatment to remove air bubbles and excess moisture.
[0042] Forming and vibration of pipe piles: Pour the treated mixture into a mold and use a high-frequency vibrator to vibrate the mold to discharge residual air bubbles and enhance the density.
[0043] Curing: Place the formed pipe piles in a standard curing room with the temperature maintained at 20 ± 1°C and the humidity maintained at 96%, and the curing time is not less than 29 days.
[0044] Example 2: Based on Example 1, an optimized anti-seepage performance concrete pipe pile is proposed.
[0045] Formulation (parts by mass):
[0046] High-performance portland cement: 48 parts
[0047] Ground sand (selected fine aggregate): 28 parts
[0048] Fly ash microspheres: 14 parts
[0049] Nano-silica: 2.5 parts
[0050] Carbon fiber filaments: 1.2 parts
[0051] Polypropylene fibers: 0.6 parts
[0052] 5 - 20mm natural crushed stone: 18 parts
[0053] High-performance polycarboxylate water reducer: 3.5 parts
[0054] Fluoropolymer-based air-entraining agent: 0.6 parts
[0055] Production process (basically the same as Example 1, but with the following adjustments):
[0056] Mixing of materials: After mixing the dry materials, add 32% of the total water volume for moistening to improve the fluidity of the mixture.
[0057] Curing: Increase the humidity in the curing room to 97% to further optimize the anti-seepage performance.
[0058] Example 3: Based on Example 1, a concrete pipe pile with improved frost resistance is proposed.
[0059] Formulation (parts by mass):
[0060] High-performance portland cement: 52 parts
[0061] Ground sand (selected fine aggregate): 32 parts
[0062] Fly ash beads: 13 parts
[0063] Nano-silica: 3.5 parts
[0064] Carbon fiber filaments: 1.8 parts
[0065] Polypropylene fibers: 0.9 parts
[0066] 5 - 20 mm natural gravel: 16.5 parts
[0067] High-performance polycarboxylate water reducer: 4.5 parts
[0068] Fluoropolymer type air-entraining agent: 0.9 parts
[0069] Production process (basically the same as Example 1, but with the following adjustments):
[0070] Introduction of air-entraining agent: Increase the dosage of the air-entraining agent to improve the frost resistance of the concrete. Curing: Extend the curing time to 30 days to ensure the full hardening of the concrete.
[0071] Example 4: Based on Example 1, a concrete pipe pile with improved comprehensive performance is proposed. Formulation (parts by mass):
[0072] High-performance portland cement: 51 parts
[0073] Ground sand (selected fine aggregate): 29 parts
[0074] Fly ash beads: 13.5 parts
[0075] Nano-silica: 3 parts
[0076] Carbon fiber filaments: 1.6 parts
[0077] Polypropylene fibers: 0.8 parts
[0078] 5 - 20 mm natural gravel: 17 parts
[0079] High-performance polycarboxylate water reducer: 4 parts
[0080] Fluoropolymer type air-entraining agent: 0.8 parts
[0081] Production process (incorporating the advantages of the previous three examples):
[0082] Material mixing: Optimized stirring parameters are adopted to ensure the uniformity and good fluidity of the mixture. Introduction of air-entraining agent: The air-entraining agent is added at an appropriate stirring time to ensure the uniform distribution of air bubbles. Vacuum treatment: More efficient vacuum degassing equipment is used to further remove air bubbles and excess moisture. Pipe pile forming and vibration: The mold is fully vibrated using a high-frequency vibrator to ensure the compactness of the concrete.
[0083] Curing: The curing room is maintained at appropriate temperature and humidity, and the curing time is not less than 30 days to ensure that the concrete reaches the best performance.
[0084] Refer to the following table, which is a comparison table of the prior art and four embodiments:
[0085]
[0086] In actual use, the above four well-designed embodiments fully demonstrate the remarkable effects of optimizing the performance of freeze-resistant and impermeable concrete pipe piles under different formulation compositions and production process parameter adjustments. These embodiments not only deeply explore the optimal ratios of key raw materials such as high-performance portland cement, selected fine aggregates, fly ash microspheres, nano-silica, carbon fiber filaments, polypropylene fibers, natural gravel, as well as high-performance polycarboxylate water reducers and fluoropolymer-type air-entraining agents, but also carefully optimize key production process steps such as material mixing, introduction of air-entraining agent, vacuum treatment, pipe pile forming and vibration, and curing.
[0087] From Example 1 to Example 4, by scientifically and reasonably adjusting these raw material ratios and production process parameters, we have successfully improved the freeze resistance and impermeability of the concrete pipe piles, enabling them to still maintain excellent performance in extremely cold and humid environments. At the same time, these optimization measures have also significantly enhanced the overall mechanical properties of the concrete pipe piles, including compressive strength, flexural strength, and durability, thus ensuring their reliability and stability in various complex engineering environments.
[0088] In summary, these embodiments not only provide us with valuable experience in optimizing the performance of freeze-resistant and impermeable concrete pipe piles, but also offer useful references and inspirations for the future research and production of concrete pipe piles. Through continuous exploration and innovation, we are confident that we can develop more concrete pipe pile products with excellent performance, strong adaptability, and high cost-effectiveness to meet the needs of different engineering fields.
[0089] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A frost-resistant and impermeable concrete pipe pile, characterized in that: The frost-resistant and anti-seepage concrete pipe pile comprises the following components in parts by mass: 45-55 parts of high-performance silicate cement, 25-35 parts of selected fine aggregate, 10-15 parts of fly ash microbeads, 2-4 parts of nano silicon dioxide, 1-2 parts of carbon fiber filaments, 0.5-1 parts of polypropylene fibers, 15-20 parts of natural crushed stone, 3-5 parts of high-performance polycarboxylate water reducer, and 0.5-1 parts of air entraining agent.
2. The frost-resistant and impermeable concrete pipe pile according to claim 1, characterized in that: The selected fine aggregate is ground sand.
3. The frost-resistant and impermeable concrete pipe pile according to claim 1, characterized in that: The particle size of the natural crushed stone is 5-20 mm.
4. The frost-resistant and impermeable concrete pipe pile according to claim 1, characterized in that: The air entraining agent is a fluorine-containing polymer type air entraining agent.
5. A production process for antifreeze and anti-seepage concrete pipe piles according to any one of claims 1 to 4, characterized in that: The process comprises the following steps: Material mixing: premixing the raw materials and then main mixing the raw materials; Introducing air-entraining agent; Vacuum treatment; Pipe pile forming and vibration; Maintenance.
6. The production process of a frost-resistant and impermeable concrete pipe pile according to claim 5, characterized in that: The detailed operation of the material mixing is as follows: Put high-performance silicate cement, selected fine aggregate, fly ash microbeads, nano-silicon dioxide, carbon fiber filaments and polypropylene fiber into a premixer for preliminary mixing; add part of water (30% of the total amount) to moisten the dry materials for subsequent mixing; The premixed materials are transferred to the main mixer, and the remaining water and high-performance polycarboxylate water-reducing agent are added, and stirred at high speed until a uniform concrete mixture with good fluidity is formed.
7. The production process of a frost-resistant and impermeable concrete pipe pile according to claim 5, characterized in that: The specific operation of introducing the air entraining agent includes: when the concrete mixture is about to be stirred, slowly adding the fluorine-containing polymer air entraining agent, and continuing to stir, so that the air entraining agent is evenly dispersed in the concrete to form stable bubbles.
8. The production process of a frost-resistant and impermeable concrete pipe pile according to claim 5, characterized in that: The specific operation of the vacuum treatment includes: pouring the concrete mixture into the vacuum degassing equipment and performing vacuum treatment; the vacuum treatment can further remove bubbles and excess water in the concrete, and improve the density and impermeability.
9. The production process of a frost-resistant and impermeable concrete pipe pile according to claim 5, characterized in that: The specific operations of the pipe pile forming and vibration include: pouring the vacuum-treated concrete mixture into the mold; and vibrating the mold with a high-frequency vibrator to expel residual bubbles in the concrete and enhance the density.
10. The production process of a frost-resistant and impermeable concrete pipe pile according to claim 5, characterized in that: The specific operation of the curing includes: placing the formed pipe piles in a standard curing room for curing, and the curing room should maintain a suitable temperature of 20±2℃ and a humidity of more than 95% to promote the hardening and strength improvement of the concrete; the curing time is not less than 28 days to ensure that the concrete reaches the designed strength.