Ion permeation measurement device and measurement method

Abstract

The invention provides an ion permeation measurement device and method, a test box of the ion permeation measurement device is internally provided with a containing cavity, the containing cavity is used for containing a permeation solution with permeation ions, the side wall of the test box is provided with a first opening communicated with the containing cavity, and a to-be-tested piece is used for being placed on the first opening; the test piece to be tested is in contact with the permeation solution; the heat exchange piece is used for covering the to-be-tested piece and exchanging heat with the to-be-tested piece under the condition that the to-be-tested piece is placed in the first opening; the power supply is provided with a positive electrode part and a negative electrode part, the positive electrode part is inserted into a to-be-tested piece, and the negative electrode part is placed into a penetrating solution to form a current loop and promote penetrating ions to migrate into the to-be-tested piece; the heat exchange piece is arranged to adjust the temperature of the concrete, so that the temperature difference environment of the concrete structural piece such as an energy pile is simulated, and the detection accuracy of the penetration parameters of the to-be-tested piece is improved.

Description

Technical Field

[0001] The present application belongs to the field of concrete testing technology, and in particular relates to an ion penetration measurement device and a measurement method. Background Art

[0002] In the field of construction engineering, the durability of concrete structures has always been a key issue that has received much attention, especially in chloride ion corrosion environments. Chloride ion penetration can cause corrosion of steel bars inside the concrete, seriously affecting structural safety and service life.

[0003] In related technologies, one end of a power pile is buried underground, where it regulates the house's temperature by exchanging heat with the subsurface soil. Power piles are susceptible to penetration by substances like chloride ions, which can affect their structure and function. However, due to the temperature difference between the inside and outside of the power pile, accurate measurement of the pile's penetration parameters is currently difficult. Summary of the Invention

[0004] The purpose of this application is to provide an ion permeation measurement device and a measurement method, aiming to solve the problem of ion permeation measurement devices in traditional technology. problem.

[0005] A first aspect of an embodiment of the present application provides an ion permeation measurement device, comprising: A test chamber, wherein the test chamber has a receiving chamber for receiving an osmotic solution containing osmotic ions, and a first opening is provided on a side wall of the test chamber, communicating with the receiving chamber, and a test piece is placed on the first opening so that the test piece contacts the osmotic solution; a heat exchange member, configured to cover the test piece and exchange heat with the test piece when the test piece is placed in the first opening; A power supply comprises a positive electrode component and a negative electrode component. The positive electrode component is used to be inserted into the test piece, and the negative electrode component is used to be placed in the permeation solution to form a current loop and promote the migration of the permeation ions into the test piece.

[0006] In some embodiments of the present application, the heat exchange element is attached to a side of the test piece facing away from the permeate solution.

[0007] In some embodiments of the present application, the ion permeation measuring device further includes a temperature measuring element, which is used to be inserted into the test piece and to detect the temperature of the test piece, and the heat exchange element adjusts the temperature of the test piece based on the detected temperature of the test piece.

[0008] In some embodiments of the present application, the heat exchange element is a semiconductor heating fin.

[0009] In some embodiments of the present application, the ion permeation measuring device further includes a fixed block, on which a second opening is provided, the second opening corresponding to the first opening, and the fixed block is used to cover a side of the test box on which the first opening is provided, so that the second opening is connected to the first opening, and defines a receiving space for accommodating the test piece.

[0010] In some embodiments of the present application, the ion permeation measurement device further includes a rubber sleeve, which is used to be filled between the inner wall of the second opening and the test piece to fix the test piece.

[0011] In some embodiments of the present application, the ion permeation measuring device further includes a diffusion coefficient meter, the power supply is disposed in the diffusion coefficient meter, and the diffusion coefficient meter is used to measure the voltage and current of the current loop formed by the power supply, the test piece, and the permeation solution.

[0012] In some embodiments of the present application, the penetrating solution is a sodium chloride solution, the penetrating ions are chloride ions, and the test piece is a concrete test block.

[0013] A second aspect of the present application further provides a measurement method for an ion permeation measurement device, which is applied to the above-mentioned ion permeation measurement device, and the measurement method comprises: Fixing the test piece on the first opening of the test box, and adding a permeation solution into the accommodating chamber of the test box until the permeation solution contacts the test piece; Turn on the power supply and heat exchanger, and remove the test piece after the preset time. cutting the test piece and spraying a color indicator on the cut surface of the test piece to show the penetration area; The size parameters of the penetration area are measured to calculate the penetration depth of the penetrating ions.

[0014] In some embodiments of the present application, the penetrating ions are chloride ions, and after calculating the penetration depth of the penetrating ions, the method further includes: Calculate the diffusion coefficient of the penetrating ions using the following formula: D RCM = ; Where DRCM is the diffusion coefficient, T is the absolute temperature of the penetrating solution, d is the penetration depth of chloride ions, U is the DC voltage applied by the power supply, t is the test duration, and A is the cross-sectional area of the test piece.

[0015] Compared with the prior art, the embodiments of the present invention have the following advantages: the above-mentioned ion permeation measurement device and measurement method include a test chamber, a heat exchanger, and a power supply; the test chamber has a accommodating chamber for accommodating a permeation solution containing permeating ions, and a first opening is provided on a side wall of the test chamber, and the test piece is used to be placed on the first opening and contact the test piece with the permeation solution; the heat exchanger is used to cover the test piece when the test piece is placed in the first opening and exchange heat with the test piece; the power supply has a positive electrode component and a negative electrode component, the positive electrode component is used to be inserted into the test piece, and the negative electrode component is used to be placed in the permeation solution to form a current loop and promote the migration of permeating ions into the test piece; in the present application, the heat exchanger is provided to adjust the temperature of the concrete, thereby simulating the temperature difference environment of concrete structures such as energy piles, which is beneficial to improving the accuracy of environmental simulation and thus improving the accuracy of detection of permeation parameters of the test piece; and the power supply is also provided to accelerate the migration speed of the permeating ions, shorten the test time, and provide the required parameters for calculating the diffusion coefficient of the permeating ions. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of an ion permeation measurement device provided in one embodiment of the present application; Figure 2 Another structural diagram of an ion permeation measurement device provided in one embodiment of the present application; Figure 3 A schematic structural diagram of an ion permeation measurement device provided in another embodiment of the present application; Figure 4 A schematic diagram of the steps of a measurement method provided in one embodiment of the present application.

[0017] Specific element symbol description: 100-test chamber, 110-permeation solution, 120-first opening, 130-liquid filling port, 200-heat exchange component, 300-power supply, 310-negative electrode component, 320-positive electrode component, 400-tested component, 500-insulation layer, 600-temperature measuring component, 700-fixed block, 710-second opening. DETAILED DESCRIPTION

[0018] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0019] It should be noted that when an element is referred to as being “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0020] It should be understood that the terms "length", "width", "up", "down", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0022] It's important to understand that concrete structural components can be subject to freeze-thaw cycles, carbonation, and ion corrosion during their service life, potentially compromising their functionality and structural safety. The impact of chloride ions on concrete, in particular, is a key concern in concrete durability. The chloride ion diffusion coefficient is a key indicator of concrete permeability and internal steel corrosion in chloride-exposed environments (such as harbors, underground projects, hydraulic structures, and coastal areas).

[0023] Currently, the main methods used to determine the chloride ion diffusion coefficient of concrete include natural diffusion, applied electric field accelerated diffusion, and pressure penetration. The electric field accelerated diffusion method is widely used due to its short experimental period and relatively accurate test results. Through rapid indoor testing, it can directly measure the depth of chloride ion penetration into concrete and derive the chloride ion diffusion coefficient of concrete. Its advantages include speed, directness, and simplicity, and it has been widely adopted internationally.

[0024] The energy underground structure is a new energy-saving building structure derived from ground-source heat pump technology. The underground structure itself is located at a certain depth in a stratum that maintains a constant temperature year-round. The underground heat exchange pipes of the ground-source heat pump system are directly embedded in the underground structure, forming an underground heat exchanger with other underground engineering structures. This system extracts and releases heat from the surrounding strata, achieving 30% to 50% energy savings compared to traditional air conditioning and hot water systems. The energy generated is clean, sustainable, and has significant economic and environmental benefits. This overcomes the two major obstacles to the urban deployment of ground-source heat pump technology: land occupation and high costs. The energy pile integrates the heat exchange circuit of a traditional buried ground-source heat pump within a pile foundation, utilizing the temperature difference between the circulating heat transfer medium within the pipe and the surrounding rock and soil for heat exchange. Hot water pipes are typically used for water circulation within the energy pile, resulting in a certain temperature difference between the inside and outside. Chloride ion penetration in concrete structural components can vary under unidirectional temperature transfer, necessitating measurement of chloride ion penetration parameters.

[0025] Based on this, the present application improves the relevant ion permeation measurement device and measurement method.

[0026] See also Figure 1 and Figure 2 , Figure 1 FIG. 1 shows a schematic structural diagram of the ion permeation measurement device provided in this embodiment. Figure 2 Another structural schematic diagram of the ion permeation measurement device provided in this embodiment is shown; the ion permeation measurement device of the embodiment of the present application includes a test chamber 100, a heat exchanger 200 and a power supply 300; the test chamber 100 has a accommodating chamber for accommodating an osmotic solution 110 containing osmotic ions, and a first opening 120 connected to the accommodating chamber is provided on the side wall of the test chamber 100, and the test piece 400 is used to be placed on the first opening 120, and the test piece 400 is in contact with the osmotic solution 110; the heat exchanger 200 is used to cover the test piece 400 when the test piece 400 is placed in the first opening 120, and to exchange heat with the test piece 400; the power supply 300 has a positive electrode component 320 and a negative electrode component 310, the positive electrode component 320 is used to be inserted into the test piece 400, and the negative electrode component 310 is used to be placed in the osmotic solution 110 to form a current loop and promote the migration of osmotic ions into the test piece 400.

[0027] It should be explained that, in this embodiment, the permeating ions are chloride ions. The test chamber 100 is a component having an internal chamber for containing a permeating solution 110 (e.g., a NaCl solution) containing chloride ions. A first opening 120 is provided in its sidewall, communicating with the chamber. The concrete test block to be tested can be secured within this opening, bringing the test block into contact with the permeating solution 110. The heat exchanger 200 is a component (e.g., a Peltier heat exchanger) covering the test piece 400. It is tightly connected to the test piece via thermally conductive silicone rubber and can exchange heat with the test piece to regulate its temperature. The power supply 300 is a device comprising a positive electrode 320 and a negative electrode 310. The positive electrode 320 (e.g., a titanium mesh embedded in the test piece) is inserted into the test piece 400, while the negative electrode 310 (e.g., a titanium mesh placed in the solution) is placed in the permeating solution 110. This forms a current loop and applies an electric field, encouraging the migration of chloride ions into the test piece. The accommodating chamber is the space within the test chamber 100 that holds the permeation solution 110, ensuring full contact between the solution and the test piece 400. The first opening 120, an opening on the sidewall of the test chamber 100 that connects to the accommodating chamber, is used to secure the test piece 400, ensuring that one side of the test piece contacts the permeation solution 110 and the other side is in contact with the heat exchange element 200. The test piece 400 is a concrete test piece, pre-embedded with a positive electrode component 320 (titanium mesh) during preparation, for testing chloride ion permeability.

[0028] It can be understood that a test chamber 100 is used to set up a accommodating cavity to accommodate the penetration solution 110, and the test piece 400 is brought into contact with the solution through the first opening 120 to ensure that the penetrating ions can migrate from the solution to the test piece; a heat exchanger 200 is used to cover the test piece 400 and exchange heat with it, which can adjust the temperature of the test piece and simulate the temperature difference environment in which concrete structural parts such as energy piles are located, which is beneficial to improving the accuracy of environmental simulation and thereby improving the accuracy of detection of penetration parameters of the test piece 400; the positive and negative pole components 310 of the power supply 300 are respectively inserted into the test piece 400 and placed in the penetration solution 110 to form a current loop, which can accelerate the migration speed of the penetrating ions and shorten the test time. At the same time, it provides the required parameters for the calculation of the diffusion coefficient of the penetrating ions, which is beneficial to improving test efficiency and data reliability.

[0029] In some embodiments of this application, please continue to refer to Figure 1 In this embodiment, the heat exchange element 200 is attached to the side of the test piece 400 facing away from the permeate solution 110 .

[0030] It is understood that by controlling the temperature of the other side of the test piece 400 through the heat exchanger 200, a one-way temperature cycle environment can be simulated. For example, when the permeate solution 110 side is at room temperature, the heat exchanger 200 can heat or cool the other side of the test piece, forming a temperature gradient from the heat exchanger 200 side to the permeate solution 110 side, simulating the one-way temperature transfer scenario caused by internal heat exchange in underground structures such as energy piles. This setting allows chloride ions to migrate into the test piece 400 under the combined action of the temperature gradient and the electric field, which can more accurately reflect the chloride ion permeability characteristics of concrete structures under the influence of temperature cycles in actual projects, providing more reliable test data for evaluating concrete durability.

[0031] In some embodiments of this application, please refer to Figure 3 The ion permeation measurement device further includes a temperature measuring element 600, which is inserted into the test piece 400 and used to detect the temperature of the test piece 400. The heat exchange element 200 adjusts the temperature of the test piece 400 based on the detected temperature of the test piece 400.

[0032] It is understood that by inserting a temperature measuring element 600 into the test piece 400 (such as a thermocouple embedded in the center of the test block), the internal temperature of the test block can be detected in real time. Based on the temperature data fed back by the temperature measuring element 600, the heat exchange element 200 (Peltier heating plate) automatically adjusts the heating power or cycle time through a temperature controller and timer to achieve precise control of the test block temperature. For example, when the temperature measuring element 600 detects that the test block temperature has not reached the set temperature, the heat exchange element 200 automatically increases the heating power; if it exceeds the set temperature, the heating is suspended to ensure that the test block temperature strictly meets the test requirements of the unidirectional temperature cycle. This setting makes the temperature simulation process more closely resemble the temperature fluctuation patterns in the actual service life of the energy pile, avoids errors in the chloride ion migration rate caused by temperature control deviations, and thus improves the accuracy of penetration depth measurement and diffusion coefficient calculation. At the same time, the linkage adjustment mechanism between the temperature measuring element 600 and the heat exchange element 200 can correct the temperature field distribution in real time, ensuring that the temperature gradient remains stable during the process of electric field-accelerated chloride ion migration, providing more reliable test data support for studying the durability of concrete under the coupling effect of temperature and electric field.

[0033] In some embodiments, the temperature measuring element 600 includes a thermocouple and a temperature detector. One end of the thermocouple is connected to the temperature detector, and the other end extends into the test piece 400 .

[0034] In some embodiments of the present application, the heat exchange element 200 is a semiconductor heating fin.

[0035] It should be explained that the semiconductor heating sheet, namely the Peltier heating sheet, is attached to the side of the test piece 400 facing away from the permeation solution 110 through thermally conductive silicone. After power is turned on, it exchanges heat with the test piece based on the Peltier effect, providing a one-way temperature cycle.

[0036] It is understandable that the semiconductor heating plate is used as the heat exchange element 200, which can be tightly fitted with the test piece 400 through the thermal conductive silicone, and can achieve precise temperature control based on the Peltier effect after power is turned on.

[0037] In some embodiments of this application, please continue to refer to Figure 2 The ion permeation measurement device of this embodiment further includes a fixed block 700, which is provided with a second opening 710. The second opening 710 corresponds to the first opening 120. The fixed block 700 is used to cover the side of the test box 100 where the first opening 120 is provided, so that the second opening 710 and the first opening 120 are connected, and define an accommodating space for accommodating the test piece 400.

[0038] It should be explained that the fixing block 700 is a component covering the side of the test box 100 where the first opening 120 is provided, and a second opening 710 corresponding to the first opening 120 is provided on the fixing block 700. When the two are connected, a storage space for accommodating the test piece 400 is formed, and the fixing block 700 is fixedly connected to the test box 100 by a slot or bolts.

[0039] It is understandable that the squeezing effect of the fixed block 700 can make the contact surface of the test piece 400 and the test box 100 fit tightly together, which is conducive to preventing the permeation solution 110 from leaking from the edge of the test piece, ensuring that the chloride ions only migrate in one direction from the permeation surface of the test piece, and avoiding the interference of side leakage on the test results. At the same time, the accommodating space defined by the fixed block 700 can accurately locate the installation position of the test piece 400, so that the contact state of the test piece with the heat exchange component 200 and the permeation solution 110 remains consistent, thereby improving the repeatability and data comparability of different batches of tests. In addition, the structural design of the fixed block 700 can enhance the overall sealing of the test device, maintain a stable environment in the accommodating space during the application of the electric field and temperature cycling, avoid the influence of external factors on the migration process of chloride ions, and thus improve the accuracy of penetration depth measurement and diffusion coefficient calculation.

[0040] In some embodiments of the present application, the ion permeation measurement device further includes a rubber sleeve, which is used to fill between the inner wall of the second opening 710 and the test piece to fix the test piece.

[0041] It should be explained that the rubber sleeve is an annular elastic component, which is filled between the inner wall of the second opening 710 of the fixing block 700 and the test piece 400, fixes the test piece by squeezing and deforming, and plays a role in sealing and leak-proofing.

[0042] It can be understood that the rubber sleeve is filled between the inner wall of the second opening 710 and the test piece 400, and its elastic deformation characteristics are used to tightly fit the edge of the test piece. On the one hand, the test piece can be stably fixed in the accommodating space formed by the first opening 120 of the test box 100 and the second opening 710 of the fixing block 700, thereby preventing the test piece from being displaced during the application of the electric field or the temperature cycle, thereby ensuring the stability of the chloride ion penetration path; on the other hand, the sealing effect of the rubber sleeve can prevent the penetration solution 110 from leaking from the gap between the test piece and the opening, and can be combined with epoxy resin waterproofing treatment to form a double sealing structure to prevent the deviation of the chloride ion migration path caused by side leakage, thereby ensuring the consistency of the test environment with the actual engineering scenario.

[0043] In some embodiments, a liquid adding port 130 is provided on the top of the test chamber 100. The liquid adding port 130 is used to add the osmotic solution 110 into the accommodating chamber. In some embodiments, a sealing plug is detachably provided on the liquid adding port 130.

[0044] In some embodiments, a thermal insulation layer 500 is provided on a side of the heat exchange element 200 facing away from the test piece 400 .

[0045] In some embodiments of this application, please refer to Figure 3 , Figure 3 FIG. 4 shows a schematic structural diagram of the ion permeation measurement device provided in this embodiment; FIG. Figure 3 As shown, in this embodiment, the diffusion coefficient measuring instrument is an NJ-RCM chloride ion diffusion coefficient measuring instrument, the temperature control system is a heat exchanger 200, the organic glass test chamber 100 is a test chamber 100, and the temperature measuring system is a temperature measuring element 600. The ion permeation measurement device of this embodiment also includes a diffusion coefficient measuring instrument. The power supply 300 is disposed within the diffusion coefficient measuring instrument. The diffusion coefficient measuring instrument is used to measure the voltage and current of the current loop formed by the power supply 300, the test piece 400, and the permeation solution 110.

[0046] It should be explained that the diffusion coefficient meter in this embodiment adopts the NJ-RCM chloride ion diffusion coefficient meter, which has an internal integrated power supply 300 module, which is connected to the anode titanium mesh in the test piece 400 and the cathode titanium mesh in the penetration solution 110 through the test line to form a closed current loop for real-time measurement of the voltage and current parameters in the loop.

[0047] It is understandable that when the measuring instrument is powered on, the power supply 300 applies a stable electric field to the concrete test block through the positive and negative titanium meshes, prompting the chloride ions to migrate into the test block under the action of the electric field force, and at the same time the measuring instrument collects the voltage and current data in the circuit in real time. This setting is based on the principle of the RCM method, integrating the power supply 300 supply and data monitoring into one, avoiding voltage fluctuations or contact resistance errors caused by external circuit connections, ensuring the stability of the electric field strength and the accuracy of the current data, and thus providing reliable parameters for the calculation of the chloride ion diffusion coefficient. In addition, the measuring instrument synchronously monitors the temperature of the infiltration solution 110, and combined with the voltage, current and subsequent penetration depth data, the diffusion coefficient can be accurately derived through the standard formula, so that the test results are highly consistent with the migration law of chloride ions under the temperature-electric field coupling in actual projects such as energy piles, thereby improving the reliability of concrete durability assessment.

[0048] In some embodiments of the present application, the permeation solution 110 is a sodium chloride solution, the permeation ions are chloride ions, and the test piece 400 is a concrete test block.

[0049] Further, in order to better implement the ion permeation measurement device in any of the above embodiments, based on the above ion permeation measurement device, please refer to Figure 4 , Figure 4 The following is a schematic diagram showing the steps of the measurement method provided in this embodiment; the embodiment of the present application also provides a measurement method of an ion permeation measurement device, which is applied to the ion permeation measurement device as described above, and the measurement method includes: S100: Fix the test piece 400 on the first opening 120 of the test chamber 100, and add the permeation solution 110 into the accommodating chamber of the test chamber 100 until the permeation solution 110 contacts the test piece 400. Specifically, open the liquid filling port 130 on the top of the test chamber 100, and observe the height of the permeation solution 110 through the glass shell of the test chamber 100.

[0050] S200: Turn on the power supply 300 and the heat exchange element 200, and remove the test piece 400 after a preset time. Specifically, the heat exchange element 200 is used to simulate the temperature environment of the test piece 400, and the power supply 300 is used to output current to accelerate the migration of penetrating ions.

[0051] S300: cutting the test piece 400 and spraying a color indicator on the cut surface of the test piece 400 to show the penetration area; specifically, the test piece 400 is cut using a pressure testing machine, and after spraying the color indicator, the area where the penetrating ions penetrate will change color, thereby measuring the penetration depth.

[0052] S400: Measure the size parameters of the penetration area to calculate the penetration depth of the penetrating ions. Specifically, a micrometer can be used for measurement to improve the accuracy to 0.1 mm.

[0053] In some embodiments of the present application, the penetrating ions are chloride ions, and after calculating the penetration depth of the penetrating ions, the method further includes: Calculate the diffusion coefficient of the penetrating ions using the following formula: D RCM = ; Wherein, DRCM is the diffusion coefficient, T is the absolute temperature of the penetrating solution 110 , d is the penetration depth of chloride ions, U is the DC voltage applied by the power supply 300 , t is the test duration, and A is the cross-sectional area of the test piece 400 .

[0054] In some embodiments, the DC voltage applied by the power supply 300 is 35 V. It is understood that using a lower voltage can avoid the effects of polarization reactions and excessive temperature rise on the resistance measurement accuracy. The measurement process is simple and easy to operate, and no complex external circuit is required. This allows for more intuitive observation of the chloride ion permeability within the energy pile, resulting in accurate test results and high practical value.

[0055] In some embodiments of the present application, the test chamber 100 is a plexiglass test chamber 100 , and its containment chamber has dimensions of 340 mm in length, 10 mm in width, and 100 mm in height. A concrete test block (corresponding to the test piece 400 ) is cut from the center of a 100 mm cube concrete block, measuring 100 mm in length, 100 mm in width, and 50 mm in height. A thermocouple (corresponding to the temperature measuring element 600 ) and a titanium mesh (corresponding to the positive electrode component 320 ) are embedded in the concrete during test block preparation. The titanium mesh measures 8 mm x 8 mm and is embedded in the concrete 10 mm from the side where the Peltier heating plate (corresponding to the heat exchanger 200 ) is attached. The thermocouple is embedded in the center of the concrete test block.

[0056] The temperature monitoring system consists of a TP700 multi-channel data logger, thermocouples, and a power supply 300. The two thermocouple test ends are embedded during concrete block preparation, and the interface ends are connected to the TP700 multi-channel data logger to monitor temperature changes within the concrete blocks over time.

[0057] The temperature circulation system consists of a power supply 300, a Peltier heating sheet, a temperature controller, and a timer. The outer side of the concrete specimen is tightly bonded to the Peltier heating sheet via thermally conductive silicone. The Peltier heating sheet provides one-way temperature circulation for the concrete specimen via the temperature controller and timer. The temperature and cycle time are set according to the actual engineering application.

[0058] There is a card slot inside the test box 100, and a circle of silicone rubber sleeve is arranged around the card slot. The contact surface between the concrete test block and the test box 100 is coated with epoxy resin for waterproofing, and then fixed inside the card slot of the test box 100.

[0059] The NJ-RCM Chloride Ion Diffusion Coefficient Tester primarily consists of a main unit, temperature measuring cables, test cables, a fixture, and a 300-wire power supply. The temperature measuring cables connect the instrument to the solution in a plexiglass test tank to measure changes in solution temperature. The test cables connect the cathode to a titanium mesh embedded in the NaCl solution, and the anode to a titanium mesh pre-embedded in a concrete test block. The instrument, test block, and solution form a circuit to measure voltage and current.

[0060] The measurement process is as follows: The output voltage of power supply 300 in the diffusion coefficient meter is set to 35V. A concrete specimen, cured to the test age, is secured to one side of test chamber 100. A 10% by mass NaCl solution is injected into the test chamber, reaching the same height as the concrete specimen. The thermocouple wires inside the concrete specimen are connected to a TP700 multi-channel data recorder. The NJ-RCM chloride diffusion coefficient meter is connected via test wires to the titanium mesh inside the concrete specimen and the titanium mesh inside the NaCl solution, with the end of the temperature measuring wire immersed in the NaCl solution. A Peltier heating element is bonded to the non-corroded surface of the concrete specimen using thermally conductive silicone. The Peltier element is connected in series with the temperature controller, power supply 300, and timer. The TP700 multi-channel data recorder, Peltier heating element, and NJ-RCM chloride diffusion coefficient meter are simultaneously activated. The NJ-RCM chloride diffusion coefficient meter's main display monitors voltage, current, and solution temperature. The Peltier heating element heating system is set to 50°C, with a temperature cycle time of 6 hours at warm temperature and 6 hours at room temperature. A TP700 multi-channel data logger monitors temperature changes at multiple locations within the concrete specimen. After 24 hours, all instruments are turned off and the data recorded. The concrete specimen is removed and split in half perpendicular to the penetration surface using a pressure testing machine. A color indicator (0.1 mol / L AgNO₃) is sprayed on the split surface. The specimen is placed in a well-lit environment. After 15 minutes, the chloride-containing portion turns purple. The colored portion is measured with a micrometer to the nearest 0.1 mm to determine the chloride ion penetration depth and calculate the chloride ion diffusion coefficient.

[0061] In some embodiments, a saturated Ca(OH)2 solution saturator can be used to vacuum saturate the concrete block for 24 hours the day before the experiment. After saturation, the concrete block is removed and dried, and epoxy resin is applied to all four sides of the concrete block before being fixed to one side of the test chamber 100.

[0062] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant description of other embodiments.

[0063] The basic concepts have been described above. It will be apparent to those skilled in the art that the detailed disclosure above is merely illustrative and does not limit the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to the present application. Such modifications, improvements, and amendments are suggested in the present application and remain within the spirit and scope of the exemplary embodiments of the present application.

[0064] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or multiple times in different locations in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0065] Similarly, it should be noted that, in order to simplify the presentation of this application and thus facilitate understanding of one or more embodiments of the invention, the foregoing descriptions of the embodiments of this application sometimes combine multiple features into a single embodiment, figure, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those recited in the claims. In fact, an embodiment may have fewer features than all of the features of a single embodiment disclosed above.

[0066] The above-described embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present application, and should all be included in the scope of protection of the present application.

Claims

1. An ion permeation measuring device, characterized in that: The ion permeation measuring device comprises: A test chamber, wherein the test chamber has a receiving chamber for receiving an osmotic solution containing osmotic ions, and a first opening is provided on a side wall of the test chamber, communicating with the receiving chamber, and a test piece is placed on the first opening so that the test piece contacts the osmotic solution; a heat exchange member, configured to cover the test piece and exchange heat with the test piece when the test piece is placed in the first opening; A power supply comprises a positive electrode component and a negative electrode component. The positive electrode component is used to be inserted into the test piece, and the negative electrode component is used to be placed in the permeation solution to form a current loop and promote the migration of the permeation ions into the test piece.

2. The ion permeation measuring device according to claim 1, characterized in that The heat exchange element is attached to a side of the test piece facing away from the permeate solution.

3. The ion permeation measuring device according to claim 2, characterized in that The ion permeation measurement device further includes a temperature measuring element, which is inserted into the test object and used to detect the temperature of the test object. The heat exchange element adjusts the temperature of the test object based on the detected temperature of the test object.

4. The ion permeation measuring device according to claim 3, characterized in that The heat exchange element is a semiconductor heating plate.

5. The ion permeation measuring device according to claim 1, characterized in that The ion permeation measuring device also includes a fixed block, which is provided with a second opening, and the second opening corresponds to the first opening. The fixed block is used to cover the side of the test box where the first opening is provided, so that the second opening and the first opening are connected, and define an accommodating space for accommodating the test piece.

6. The ion permeation measuring device according to claim 5, characterized in that The ion permeation measuring device further includes a rubber sleeve, which is used to be filled between the inner wall of the second opening and the test piece to fix the test piece.

7. The ion permeation measuring device according to claim 1, characterized in that The ion permeation measuring device further includes a diffusion coefficient measuring instrument. The power supply is disposed in the diffusion coefficient measuring instrument. The diffusion coefficient measuring instrument is used to measure the voltage and current of a current loop formed by the power supply, the test piece, and the permeation solution.

8. The ion permeation measuring device according to any one of claims 1 to 7, characterized in that: The penetrating solution is a sodium chloride solution, the penetrating ions are chloride ions, and the test piece is a concrete test block.

9. A measurement method for an ion permeation measurement device, characterized in that: Applied to the ion permeation measurement device according to any one of claims 1 to 8, the measurement method comprises: Fixing the test piece on the first opening of the test box, and adding a permeation solution into the accommodating chamber of the test box until the permeation solution contacts the test piece; Turn on the power supply and heat exchanger, and remove the test piece after the preset time. cutting the test piece and spraying a color indicator on the cut surface of the test piece to show the penetration area; The size parameters of the penetration area are measured to calculate the penetration depth of the penetrating ions.

10. The measuring method of the ion permeation measuring device according to claim 9, characterized in that: The penetrating ions are chloride ions, and after calculating the penetration depth of the penetrating ions, it also includes: Calculate the diffusion coefficient of the penetrating ions using the following formula: D RCM = ； Where DRCM is the diffusion coefficient, T is the absolute temperature of the penetrating solution, d is the penetration depth of chloride ions, U is the DC voltage applied by the power supply, t is the test duration, and A is the cross-sectional area of the test piece.

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