Experimental device for studying mechanical properties of single carbon fiber after polarization under ICCP action

Abstract

The utility model discloses a kind of experimental apparatus for researching the mechanical property of single carbon fiber under the polarization of ICCP, experimental apparatus includes: single carbon fiber tensioning device, cathodic protection device and circuit device;Cathodic protection device includes: tank and two support structures;The first end of single carbon fiber extends to tank outside from first via and is connected circuit device;Rebar is sealed between second via, and the first end of rebar extends to tank outside from second via and is connected circuit device.The application simulates the ICCP working condition scene of carbon fiber construction impressed current cathodic protection system of reinforced concrete collocation in coastal area, carries out the experiment of the cathodic protection of rebar, to study the performance change of single carbon fiber before and after polarization or under the polarization of different degree of contrast.In the whole experimental process, cement-based material is not needed, there is no single carbon fiber and cement-based separation damage problem, then the accuracy of mechanical property measurement of single carbon fiber is higher.

Description

Technical Field

[0001] This utility model relates to the field of measurement technology for civil engineering reinforcement materials, and in particular to an experimental device for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP. Background Technology

[0002] In the field of modern civil engineering structural reinforcement, with the increasing service life of infrastructure, structures face various durability problems such as chloride ion corrosion and carbonization, with steel reinforcement corrosion being particularly severe in coastal structures. Impressed Current Cathodic Protection (ICCP), an electrochemical-based corrosion protection technology, applies a cathodic current to the protected metal, shifting the metal surface potential negatively to the corrosion-resistant zone, thus effectively inhibiting metal corrosion and gradually becoming an important corrosion protection method in coastal areas. In concrete structures, ICCP systems not only extend the service life of steel reinforcement but also achieve intelligent and precise protection through optimized protection parameters. Meanwhile, carbon-reinforced cementitious matrix (C-FRCM) composites, with their high strength, high modulus, corrosion resistance, and good electrical conductivity, are widely used in civil engineering reinforcement. In ICCP systems, C-FRCM composites function as both anodic protection materials and structural reinforcement materials. On the one hand, C-FRCM, as an anode sacrificial material, utilizes its conductivity and electrochemical activity to form a stable current path in the ICCP system. Through its own electrochemical oxidation reaction, it consumes the anode current, thereby protecting the metal components in the structure. On the other hand, C-FRCM, with its excellent mechanical properties, can significantly improve the tensile, shear, and fatigue resistance of the overall structure, enhancing its load-bearing capacity and ductility.

[0003] However, current research on C-FRCM composites in ICCP systems still faces many limitations. Existing studies largely focus on the mechanical property analysis of carbon fiber mesh-reinforced components at the macroscopic scale, exploring their load-bearing capacity enhancement effect through loading tests on beams, columns, and other components. However, from a microscopic perspective of materials science, research on the evolution mechanism of the mechanical properties of a single carbon fiber bundle under ICCP is severely insufficient. As the basic load-bearing unit of the carbon fiber mesh, the mechanical properties of a single carbon fiber bundle are significantly affected by the coupling effect of the electrochemical environment, loading conditions, and environmental factors of the ICCP system. Because carbon fibers typically have a diameter of 5–8 μm and exhibit a three-dimensional random distribution in cement-based materials, tightly bonded to cement hydration products, it is difficult to non-destructively separate them from the carbon fiber mesh using conventional material testing methods after ICCP. In existing technologies, traditional mechanical peeling or chemical dissolution methods easily cause surface damage to the carbon fibers, introducing defects, making the obtained mechanical property data unable to accurately reflect their intrinsic properties under ICCP conditions. This current research status quo makes it impossible to establish a quantitative relationship between the microscopic mechanical properties of carbon fibers and the macroscopic mechanical behavior of carbon fiber mesh, which restricts the optimized design and rational application of carbon fiber materials in ICCP systems.

[0004] Therefore, existing technologies still need improvement and development. Utility Model Content

[0005] The technical problem to be solved by this invention is to provide an experimental device for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, in order to address the above-mentioned deficiencies of the prior art.

[0006] The technical solution adopted by this utility model to solve the technical problem is as follows:

[0007] An experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, comprising: a single bundle of carbon fiber tensioning device, a cathodic protection device, and a circuit device; the single bundle of carbon fiber tensioning device is configured to mount a single bundle of carbon fibers and provide tension to the single bundle of carbon fibers; the cathodic protection device includes:

[0008] The tank is configured to contain a seawater-saturated calcium hydroxide solution;

[0009] Two support structures are disposed on the wall of the groove, and the two support structures are configured to support the two ends of the single-bundle carbon fiber tensioning device respectively.

[0010] The tank wall has a first through hole and a second through hole;

[0011] The liquid level of the seawater saturated calcium hydroxide solution is located between the first through hole and the single bundle of carbon fiber. The first end of the single bundle of carbon fiber extends from the first through hole to the outside of the tank and is connected to the circuit device. The second through hole is located below the support structure.

[0012] The second through hole is configured to install a reinforcing bar, and the reinforcing bar is sealed to the second through hole. A first end of the reinforcing bar extends from the second through hole to the outside of the groove and connects to the circuit device.

[0013] The experimental apparatus described herein is used to study the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, wherein the single bundle of carbon fibers is located directly above the reinforcing bar.

[0014] The experimental apparatus described herein is used to study the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, wherein the tank wall has a placement groove, and the second end of the reinforcing bar is inserted into the placement groove.

[0015] The experimental apparatus described herein is used to study the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, wherein both the single bundle of carbon fiber tensioning device and the cathodic protection device are formed by splicing together acrylic plates.

[0016] The experimental apparatus described herein is used to study the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, wherein the single bundle of carbon fibers is arranged parallel to the reinforcing bar.

[0017] The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP includes a single bundle of carbon fiber tensioning device comprising:

[0018] A frame structure having a third through hole and a fourth through hole;

[0019] The second end of the single carbon fiber bundle passes through and is fixed in the third through hole, and the position near the first end of the single carbon fiber bundle passes through and is fixed in the fourth through hole.

[0020] The experimental apparatus described herein for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP includes a through hole formed in the middle of the frame structure. The through hole has a length of 200mm to 300mm, a width of 15mm to 30mm, and a height of 10mm to 20mm. The diameter of the third through hole is 4mm to 8mm, and the diameter of the fourth through hole is 4mm to 8mm. The wall thickness of the frame structure is 3mm to 10mm.

[0021] The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, wherein the circuit device includes:

[0022] DC power supply;

[0023] The current stabilizer is electrically connected to the DC power supply.

[0024] The DC power supply has an output voltage of 0–30V and a current of 0–1A.

[0025] The current accuracy of the current stabilizer is ±0.001mA;

[0026] The flow stabilizer is electrically connected to the first end of the single bundle of carbon fiber and the first end of the reinforcing bar, respectively.

[0027] The experimental apparatus described herein for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP includes a support structure with a length of 60mm to 100mm, a width of 20mm to 40mm, and a thickness of 5mm to 15mm; the internal space of the tank has a length of 220mm to 320mm, a width of 60mm to 100mm, and a height of 60mm to 120mm; and the wall thickness of the tank is 3mm to 10mm.

[0028] The experimental apparatus described herein is used to study the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, wherein the diameter of the first through hole is 7mm to 12mm, and the diameter of the second through hole is 7mm to 12mm.

[0029] Beneficial Effects: This application simulates the ICCP (Induced Current Cathodic Protection) scenario of an impressed current cathodic protection system constructed with reinforced concrete and carbon fiber in a coastal area. Specifically, a seawater-saturated calcium hydroxide solution is used to simulate the corrosive environment of cement-based materials containing seawater. By applying voltage to the reinforcing steel and single bundles of carbon fibers, cathodic protection experiments on the reinforcing steel can be conducted to study the performance changes of single bundles of carbon fibers before and after the experiment. Since no cement-based materials are required throughout the experiment, there is no issue of separation and damage between the single bundle of carbon fibers and the cement base, resulting in higher accuracy in measuring the mechanical properties of the single bundle of carbon fibers. Attached Figure Description

[0030] Figure 1 This is a functional principle block diagram of the experimental device used to study the mechanical properties of a single bundle of carbon fibers after polarization under ICCP in this embodiment of the present invention.

[0031] Figure 2 This is a first structural schematic diagram of the single-bundle carbon fiber tensioning device and the cathodic protection device in this utility model embodiment.

[0032] Figure 3 This is a second structural schematic diagram of the single-bundle carbon fiber tensioning device and the cathodic protection device in this embodiment of the present invention.

[0033] Figure 4This is a top view of the single-bundle carbon fiber tensioning device and the cathodic protection device in the embodiments of this utility model.

[0034] Figure 5 yes Figure 4 Sectional view along line A.

[0035] Figure 6 This is a schematic diagram of the first structure of the single-bundle carbon fiber tensioning device in this embodiment of the present invention.

[0036] Figure 7 This is a schematic diagram of the second structure of the single-bundle carbon fiber tensioning device in this embodiment of the present invention.

[0037] Figure 8 This is a schematic diagram of the structure of the cathodic protection device in an embodiment of this utility model.

[0038] Explanation of reference numerals in the attached figures:

[0039] 10. Single-bundle carbon fiber tensioning device; 11. Frame structure; 111. Third through hole; 112. Fourth through hole; 20. Cathodic protection device; 21. Tank; 211. First through hole; 212. Second through hole; 213. Placement groove; 22. Support structure; 30. Circuit device; 31. DC power supply; 32. Current stabilizer plate; 40. Single-bundle carbon fiber; 41. First end; 42. Second end; 50. Reinforcing bar; 51. First end; 52. Second end. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer and more explicit, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0041] Please also refer to Figures 1 to 8 This invention provides some embodiments of an experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP.

[0042] like Figure 1 As shown, the experimental apparatus of this invention for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP includes: a single bundle of carbon fiber tensioning device 10, a cathodic protection device 20, and a circuit device 30. The single bundle of carbon fiber tensioning device 10 is configured to install a single bundle of carbon fibers 40 and provide tension to the single bundle of carbon fibers 40; the cathodic protection device 20 is configured to install the single bundle of carbon fibers 40 and a reinforcing bar 50 to form an impressed current cathodic protection system; and the circuit device 30 is configured to provide electrical energy to the single bundle of carbon fibers 40 and the reinforcing bar 50. Figure 1The middle arrow indicates power supply. Electrical energy is supplied to the single bundle of carbon fiber 40 and the steel bar 50 through the circuit device 30. The single bundle of carbon fiber 40 is sacrificed, and the steel bar 50 is protected. After the test, the performance (such as mechanical properties) of the single bundle of carbon fiber 40 can be tested.

[0043] like Figure 1 and Figure 2 As shown, the cathodic protection device 20 includes:

[0044] Tank 21 is configured to contain a seawater-saturated calcium hydroxide solution;

[0045] Two support structures 22 are disposed on the wall of the groove 21, and the two support structures 22 are configured to support the two ends of the single-bundle carbon fiber tensioning device 10 respectively.

[0046] The tank 21 has a first through hole 211 and a second through hole 212 in its wall. The liquid level of the seawater saturated calcium hydroxide solution is located between the first through hole 211 and the single bundle of carbon fiber 40. The first end 41 of the single bundle of carbon fiber 40 extends from the first through hole 211 to the outside of the tank 21 and connects to the circuit device 30. The second through hole 212 is located below the support structure 22. The second through hole 212 is configured to install a reinforcing bar 50, and the reinforcing bar 50 is sealed to the second through hole 212. The first end 51 of the reinforcing bar 50 extends from the second through hole 212 to the outside of the tank 21 and connects to the circuit device 30.

[0047] Specifically, tank 21 has a containment space to hold a seawater-saturated calcium hydroxide solution. The seawater-saturated calcium hydroxide solution is seawater with added calcium hydroxide, and sufficient calcium hydroxide is added to saturate the solution. The seawater-saturated calcium hydroxide solution is used to simulate the corrosive environment of cement-based materials containing seawater, and the calcium hydroxide content is 2wt% to 7wt%. The solution simulates the pore fluid of cement-based materials in seawater. Calcium hydroxide powder is added to the simulated seawater solution prepared according to the standard "Standard Practice for the Preparation of Substitute Ocean Water" ASTM D1141-1998 (2013) until a small amount of calcium hydroxide precipitate appears. The solution is a simulated seawater-saturated calcium hydroxide solution (see Table 1 for details).

[0048] Solution preparation procedure: Prepare a saturated seawater calcium hydroxide solution according to the proportions in Table 1. The steps are as follows: ① Heat 1L of deionized water to 25±2℃; ② Add NaCl, MgCl2·6H2O, Na2SO4 and other reagents in sequence (in the order of the table). After each reagent is added, stir at 300r / min for 10min until completely dissolved; ③ Finally, add Ca(OH)2 powder, stir for 30min and let stand for 24h. Take the supernatant as the experimental solution. The pH value of the solution is controlled at 12.5±0.2.

[0049] The trough 21 can be rectangular, comprising a bottom plate and four walls. All four walls are connected to the bottom plate and are connected sequentially. Since the bottom plate is rectangular, the walls are divided into long-side walls and short-side walls. Support structures 22 are installed on the walls; there are two support structures 22, each installed on one of the corresponding walls. The two support structures 22 are installed on their respective short-side walls. There is a gap between the two support structures 22. The support structures 22 can support the single-bundle carbon fiber tensioning device 10. The two ends of the single-bundle carbon fiber tensioning device 10 are located on the corresponding support structures 22, and the middle of the single-bundle carbon fiber tensioning device 10 is suspended, corresponding to the position of the reinforcing bar 50.

[0050] After inserting the reinforcing bar 50 into the lower hole and sealing it completely, the steps should be as follows: add seawater-saturated calcium hydroxide solution to the tank 21, and then place the single-bundle carbon fiber tensioning device 10 on the support structure 22 of the tank 21. This can prevent the single-bundle carbon fiber 40 from being damaged by solution erosion when the seawater-saturated calcium hydroxide solution is added to the tank 21.

[0051] Table 1. Simulated mix proportions of cement-based pore fluid (experimental temperature 25±2℃)

[0052]

[0053] Introduction to tensile property testing:

[0054] Tensile properties tests were conducted on polarized single-bundle carbon fiber 40 according to the standard "Test Method for Tensile Properties of Oriented Fiber Reinforced Plastics". Specimens were prepared with a single-bundle carbon fiber 40 having a length of 230 mm. Both ends were fixed with FRP (fiber reinforced polymer) using epoxy resin. The FRP was rectangular, with a length of 50 mm along the carbon fiber direction and 30 mm along its perpendicular direction. The test loading rate was 0.25 mm / min. The phenomena before and after carbon fiber fracture were observed during the test. The microstructure of the carbon fiber under different charge density accumulations was observed using an electron scanning microscope. The tensile strength and ultimate strain of the carbon fiber were then measured.

[0055] like Figure 3 , Figure 6 and Figure 7As shown, a first through-hole 211 and a second through-hole 212 are formed on the tank wall. The first through-hole 211 and the second through-hole 212 are located on the same tank wall, specifically on the same short side. The first through-hole 211 is located above the second through-hole 212. The first through-hole 211 allows a single bundle of carbon fiber 40 to pass through, and the second through-hole 212 allows a reinforcing bar to pass through. The gap between the second through-hole 212 and the reinforcing bar 50 is sealed to prevent leakage of the seawater-saturated calcium hydroxide solution. Most of the reinforcing bar 50 is located inside the tank body 21, and a small portion of the reinforcing bar 50 is located outside the tank body 21. The surface of the seawater-saturated calcium hydroxide solution needs to submerge both the single bundle of carbon fiber 40 and the reinforcing bar 50. The first through-hole 211 can be located above the surface of the seawater-saturated calcium hydroxide solution, preventing leakage from the first through-hole 211. Alternatively, the gap between the single bundle of carbon fiber 40 and the first through-hole 211 can also be sealed. Most of the single bundle of carbon fiber 40 is located inside the tank body 21, and a small portion of the single bundle of carbon fiber 40 is located outside the tank body 21. The first end 51 of the steel bar 50 located outside the tank 21 and the first end 41 of the single bundle of carbon fiber 40 located outside the tank 21 are respectively connected to the circuit device 30. The first end 51 of the steel bar 50 is connected to the cathode of the circuit device 30, and the first end 41 of the single bundle of carbon fiber 40 is connected to the anode of the circuit device 30.

[0056] This application simulates the ICCP (Induced Current Cathodic Protection) scenario of an impressed current cathodic protection system constructed with reinforced concrete and carbon fiber in a coastal area. Specifically, a seawater-saturated calcium hydroxide solution is used to simulate the corrosive environment of cement-based materials containing seawater. By applying voltage to the reinforcing steel 50 and the single bundle of carbon fiber 40, an experiment on the cathodic protection of the reinforcing steel 50 can be conducted to study the performance changes of the single bundle of carbon fiber 40 before and after the experiment. Since no cement-based materials are required throughout the experiment, there is no issue of separation and damage between the single bundle of carbon fiber 40 and the cement base, thus resulting in higher accuracy in measuring the mechanical properties of the single bundle of carbon fiber 40.

[0057] In a preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the single bundle of carbon fiber 40 is located directly above the reinforcing bar 50.

[0058] Specifically, since the single carbon fiber bundle 40 is located directly above the reinforcing bar 50, the spacing between the single carbon fiber bundle 40 and the reinforcing bar 50 is fixed and calculable. By changing other parameters while keeping the spacing between the single carbon fiber bundle 40 and the reinforcing bar 50 constant, the performance of the single carbon fiber bundle 40 under different conditions can be obtained.

[0059] In a preferred embodiment of this utility model, such as Figure 5 and Figure 6 As shown, the wall of the trough 21 has a placement groove 213, and the second end 52 of the reinforcing bar 50 is inserted into the placement groove 213.

[0060] Specifically, a placement groove 213 is provided on the groove wall. The placement groove 213 is used to place the second end 52 of the reinforcing bar 50. The height of the placement groove 213 is the same as the height of the second through hole 212, so the reinforcing bar 50 is set horizontally.

[0061] In a preferred embodiment of this utility model, both the single-bundle carbon fiber tensioning device and the cathodic protection device 20 are formed by splicing acrylic plates.

[0062] Specifically, the single-bundle carbon fiber tensioning device 10 can be integrally formed from acrylic sheets or assembled from spliced ​​acrylic sheets. The cathodic protection device 20 is assembled from spliced ​​acrylic sheets, with both the tank bottom plate and tank walls made of acrylic sheets. The support structure 22 is a cuboid, with a length of 60mm to 100mm, a width of 20mm to 40mm, and a thickness of 5mm to 15mm. The internal space of the tank 21 has a length of 220mm to 320mm, a width of 60mm to 100mm, and a height of 60mm to 120mm. The diameter of the first through hole 211 is 7mm to 12mm, and the diameter of the second through hole 212 is 7mm to 12mm. The wall thickness of the tank 21 is 3mm to 10mm.

[0063] In a preferred embodiment of this utility model, such as Figure 4 and Figure 5 As shown, the single bundle of carbon fiber 40 is arranged parallel to the steel bar 50.

[0064] Specifically, if the single bundle of carbon fiber 40 is set parallel to the steel bar 50, then the minimum distance between any point of the single bundle of carbon fiber 40 and the steel bar 50 is the same, which is beneficial to make the single bundle of carbon fiber 40 uniformly polarized and further improve the accuracy and reliability of the experimental results.

[0065] In a preferred embodiment of this utility model, such as Figure 5 and Figure 8 As shown, the single-bundle carbon fiber tensioning device 10 includes:

[0066] A frame structure 11, wherein the frame structure 11 has a third through hole 111 and a fourth through hole 112;

[0067] The second end 42 of the single carbon fiber bundle 40 passes through and is fixed in the third through hole 111, and the position near the first end 41 of the single carbon fiber bundle 40 passes through and is fixed in the fourth through hole 112.

[0068] Specifically, a through hole is formed in the middle of the frame structure 11, and the through hole of the frame structure 11 faces the reinforcing bar 50. The frame structure 11 is specifically a rectangular frame structure, and a rectangular through hole is formed in the middle of the rectangular frame structure. A third through hole 111 and a fourth through hole 112 are formed on the frame structure 11. A single bundle of carbon fiber 40 passes through the third through hole 111 and the fourth through hole 112 in sequence and is fixed in the third through hole 111 and the fourth through hole 112. The first end 41 of the single bundle of carbon fiber 40 passes through the fourth through hole 112 and extends through the first through hole 211 to the outside of the groove 21. The length of the through hole is 200mm to 300mm, the width is 15mm to 30mm, and the height is 10mm to 20mm. The diameter of the third through hole 111 is 4mm to 8mm, and the diameter of the fourth through hole 112 is 4mm to 8mm. The wall thickness of the frame structure 11 is 3mm to 10mm.

[0069] In a preferred embodiment of this utility model, such as Figure 1 As shown, the circuit device 30 includes:

[0070] DC power supply 31;

[0071] The current stabilizer 32 is electrically connected to the DC power supply 31.

[0072] The DC power supply 31 has an output voltage of 0-30V and a current of 0-1A; the current stabilizing plate 32 has a current accuracy of ±0.001mA; the current stabilizing plate 32 is electrically connected to the first end 41 of the single bundle of carbon fiber 40 and the first end 51 of the steel bar 50.

[0073] Specifically, the DC power supply 31 provides electrical energy to the steel bar 50 and the single bundle of carbon fiber 40, and the current stabilizer 32 is used to stabilize the current. The current stabilizer 32 is connected to the first end 41 of the single bundle of carbon fiber 40 and the first end 51 of the steel bar 50, respectively.

[0074] It should be understood that the application of this utility model is not limited to the examples above. Those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. An experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, characterized in that, include: Single-bundle carbon fiber tensioning device, cathodic protection device and circuit device; The single-bundle carbon fiber tensioning device is configured to install a single bundle of carbon fibers and provide tension to the single bundle of carbon fibers; the cathodic protection device includes: The tank is configured to contain a seawater-saturated calcium hydroxide solution; Two support structures are disposed on the wall of the groove, and the two support structures are configured to support the two ends of the single-bundle carbon fiber tensioning device respectively. The tank wall has a first through hole and a second through hole; The liquid level of the seawater saturated calcium hydroxide solution is located between the first through hole and the single bundle of carbon fiber. The first end of the single bundle of carbon fiber extends from the first through hole to the outside of the tank and is connected to the circuit device. The second through hole is located below the support structure. The second through hole is configured to install a reinforcing bar, and the reinforcing bar is sealed to the second through hole. A first end of the reinforcing bar extends from the second through hole to the outside of the groove and connects to the circuit device.

2. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP according to claim 1, characterized in that, The single bundle of carbon fiber is located directly above the reinforcing bar.

3. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP according to claim 1, characterized in that, The trough wall has a placement groove, and the second end of the reinforcing bar is inserted into the placement groove.

4. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP according to claim 1, characterized in that, Both the single-bundle carbon fiber tensioning device and the cathodic protection device are formed by splicing acrylic plates.

5. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP according to claim 1, characterized in that, The single bundle of carbon fiber is arranged parallel to the reinforcing bar.

6. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP according to any one of claims 1 to 5, characterized in that, The single-bundle carbon fiber tensioning device includes: A frame structure having a third through hole and a fourth through hole; The second end of the single carbon fiber bundle passes through and is fixed in the third through hole, and the position near the first end of the single carbon fiber bundle passes through and is fixed in the fourth through hole.

7. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP according to claim 6, characterized in that, A through hole is formed in the middle of the frame structure. The length of the through hole is 200mm to 300mm, the width is 15mm to 30mm, and the height is 10mm to 20mm. The diameter of the third through hole is 4mm to 8mm, and the diameter of the fourth through hole is 4mm to 8mm. The wall thickness of the frame structure is 3mm to 10mm.

8. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, according to any one of claims 1 to 5, is characterized in that... The circuit device includes: DC power supply; The current stabilizer is electrically connected to the DC power supply. The DC power supply has an output voltage of 0–30V and a current of 0–1A. The current accuracy of the current stabilizer is ±0.001mA; The flow stabilizer is electrically connected to the first end of the single bundle of carbon fiber and the first end of the reinforcing bar, respectively.

9. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP according to any one of claims 1 to 5, characterized in that, The length of the support structure is 60mm to 100mm, the width is 20mm to 40mm, and the thickness is 5mm to 15mm; the length of the internal space of the trough is 220mm to 320mm, the width is 60mm to 100mm, and the height is 60mm to 120mm; the wall thickness of the trough is 3mm to 10mm.

10. The experimental apparatus for studying the mechanical properties of a single bundle of carbon fibers after polarization under ICCP, according to any one of claims 1 to 5, is characterized in that, The diameter of the first via is 7mm to 12mm, and the diameter of the second via is 7mm to 12mm.

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