Cementitious substrate accelerated carbonation or mineralization system and method

Abstract

The application discloses a cement-based material electric accelerated carbonation or mineralization system and method, which utilizes a carbon dioxide pressure detector to real-timely respond to a carbon dioxide pressure value, adjusts carbon dioxide concentration in time by controlling an opening and closing state of a valve, and thus maintains stability of a carbonate ion concentration required during operation of the device and the system, so that CO2 concentration and pressure in the whole device can be controlled; the system utilizes electromigration to make the carbonate ions migrate directionally and quickly into a cement-based test piece, and the carbonate ions react with alkaline components such as calcium hydroxide and hydrated calcium silicate in the test piece to generate a dense material, so as to accelerate carbonation. The system makes the carbonate ions migrate into the test piece with a certain water content, and the carbonate ions can directly react with the alkaline components such as the calcium hydroxide and the hydrated calcium silicate, and has no special requirement for various test conditions, so that the whole operation process is more simple and convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of cement-based material detection, in particular to a system and method for accelerating carbonization or mineralization of a cement substrate by electrifying the cement substrate. Background Art

[0002] Carbonation of concrete is a form of chemical corrosion. Current methods primarily involve infiltrating carbon dioxide gas through the pores of hardened concrete, where it reacts with alkaline substances (Ca(OH)2) to form carbonates (CaCO3) and water, reducing the concrete's alkalinity. Carbonation primarily occurs through this reaction, producing dense carbonized products that improve the physical properties of recycled aggregates and, consequently, the performance of recycled aggregate concrete. This reduction in alkalinity leads to changes in pH; this process begins at the concrete surface and gradually deepens over time.

[0003] However, existing methods for testing the carbonization effect of cement-based specimens still rely on crushing the specimens and then measuring the pH using a pH test solution, indirectly determining the carbonization effect of the cement-based specimens. This is extremely inconvenient and the measurement results are not accurate enough.

[0004] At present, the existing technology generally uses gaseous or liquid carbon dioxide to directly carbonize the specimens. Its essence is still that carbon dioxide dissolves in water to generate carbonic acid to obtain carbonate ions, and the reaction is carried out in the form of carbonate ions. However, for the existing technology, in order to allow a sufficient amount of carbon dioxide to enter the interior of the cement-based specimen and complete a chemical reaction with its alkaline components, this process has extremely strict requirements on temperature, humidity, specimen moisture content, specimen size, etc., and the optimal test conditions are not clear. The carbonization effect is poor and the process is time-consuming.

[0005] Conventional methods utilize gaseous CO2 to carbonize and mineralize cement-based materials, typically accelerating the process by increasing the concentration of gaseous CO2 in the environment. A small number of methods utilize CO2 in other phases (e.g., liquid) to accelerate the carbonization or mineralization of cement-based materials. Gaseous CO2 has low carbonization efficiency and a long reaction time, significantly reducing the carbonization rate of cement-based materials. Liquid CO2 carries the potential risk of unstable CO2 phases, making the carbonization reaction difficult to stably control.

[0006] Therefore, a more efficient carbonization or mineralization system and method is needed. Summary of the Invention

[0007] In view of this, the object of the present invention is to provide a system and method for accelerating carbonization or mineralization of cement substrates by applying electricity, which uses electricity to accelerate the migration of carbonate ions to quickly realize the carbonization detection process of cement substrate specimens.

[0008] In order to achieve the above object, the present invention provides the following technical solutions:

[0009] The cement substrate electrification accelerated carbonization or mineralization system provided by the present invention includes a test bench, characterized in that: the test bench is provided with a carbonate ion generation unit, a specimen tank, an electric field acceleration unit, and a carbonization or mineralization state detection unit;

[0010] The carbonate ion generating unit is used to generate carbonate ions required for the carbonization reaction in the test piece;

[0011] The test piece slot is used to place the test piece;

[0012] The electric field acceleration unit is arranged on both sides of the test piece slot, and is used to apply a voltage to the test piece to accelerate the migration of carbonate ions;

[0013] The carbonization or mineralization state detection unit is used to determine the carbonization degree of the test piece by detecting the concentration of carbonate ions passing through the test piece.

[0014] Furthermore, the carbonate ion generating unit includes a solution tank, a gas delivery device, and a measuring device;

[0015] The lower part of the solution tank is configured as a solution part for accommodating a saturated sodium hydroxide solution, the upper part of the solution tank is a gas part for accommodating carbon dioxide gas, the measuring device is arranged in the solution part for measuring the carbonate ion concentration in the solution; the gas delivery device is used to deliver carbon dioxide gas to the gas part in the solution tank.

[0016] Furthermore, the gas delivery device includes a carbon dioxide delivery pipeline, a valve, and a carbon dioxide pressure detector; the carbon dioxide delivery pipeline is used to deliver carbon dioxide gas to the test bench; the valve is arranged on the carbon dioxide delivery pipeline to control the on-off state of the carbon dioxide gas delivery; the carbon dioxide pressure detector is arranged in the gas part to detect the carbon dioxide gas pressure.

[0017] Furthermore, the carbonate ion generating unit further comprises a carbon dioxide intake control unit, which is used to determine the on / off state of a valve according to carbon dioxide pressure, so as to be suitable for delivering carbon dioxide gas into the solution tank.

[0018] Furthermore, it also includes a display device, which includes a display screen and a processing and analysis unit; the carbon dioxide pressure detector and the measuring device are respectively connected to the processing and analysis unit; the display screen is used to output the detection result data of the carbon dioxide pressure detector; and is used to output the detection result of the carbonate ion concentration in the solution portion by the measuring device;

[0019] Furthermore, the electric field acceleration unit includes an anode plate, a cathode plate, and a power supply; the anode plate and the cathode plate are respectively connected to the power supply, and the anode plate and the cathode plate are respectively arranged on both sides of the test piece, and the electric field formed by the anode plate and the cathode plate is used to accelerate the migration of carbonate ions in the solution into the test piece;

[0020] Furthermore, the carbonization state detection unit includes a deionized water tank, one side of which is used to set the test piece and receive carbonate ions passing through the test piece; and a detector for detecting carbonate ion concentration is set in the deionized water tank.

[0021] The carbonization or mineralization method provided by the present invention using the above-mentioned cement substrate electrification accelerated carbonization or mineralization system comprises the following steps:

[0022] S1: Place the test object, i.e., the cement-based specimen, between the electrode plates;

[0023] S2: Open the valve to allow carbon dioxide to enter area 1 and fill area 2, forming a stable pressure in area 2; after obtaining a mixed solution of sodium hydroxide and sodium carbonate, close the valve;

[0024] S3: Turn on the power supply, and the electric field between the electrode plates accelerates the carbonate ions to move in a directional manner and react with the alkaline components inside the specimen;

[0025] S4: Monitor the carbon dioxide pressure in area 2 and the sodium carbonate concentration in area 3 through the monitoring instrument; display the concentration change graph on the display screen; and determine the degree of carbonization or mineralization completion.

[0026] Furthermore, after turning on the power in step S3, carbonization treatment is performed according to the following steps. The specific steps are as follows:

[0027] Excess sodium hydroxide crystals are placed in area 1 to maintain the concentration of sodium hydroxide solution in area 1;

[0028] By inputting gaseous carbon dioxide into area 2 to react with sodium hydroxide to generate new sodium carbonate, the entire area 1 is in a state of mixing sodium hydroxide and sodium carbonate.

[0029] Furthermore, after turning on the power in step S3, the mineralization process is performed according to the following steps. The specific steps are as follows:

[0030] By monitoring the concentration of carbonate ions in area three and displaying its change over time on the terminal display screen, when the graph shows a linear growth trend, it can be determined that the cement-based specimen has completed mineralization;

[0031] By controlling the running time through the regional tricarbonate ion concentration graph on the terminal display, specimens with different carbonization degrees can be obtained.

[0032] The beneficial effects of the present invention are:

[0033] The present invention provides a system and method for accelerating carbonization or mineralization of a cement substrate by applying electricity. The system uses electromigration to cause carbonate ions to migrate directionally, rapidly entering the cement-based specimen, and chemically reacting with alkaline components such as calcium hydroxide and calcium silicate hydrate in the specimen to form a dense substance, thereby accelerating carbonization.

[0034] The present invention uses a carbon dioxide pressure detector to reflect the carbon dioxide pressure value in real time, and timely adjusts the carbon dioxide concentration by controlling the opening and closing state of the valve, thereby maintaining the stable carbonate ion concentration required for the operation of the device and the system. Therefore, the CO2 concentration and pressure in the entire device can be controlled; the main advantage of the controllable CO2 concentration is to ensure that the CO3 in the solution 2- The ion content is kept stable and the pressure is controllable mainly to further drive the dissolution of CO2 and the CO3 in the solution under pressure. 2- Ion migration is accelerated, improving the carbonization or mineralization efficiency of cement-based specimens. Compared with existing cement-based carbonization methods, this technology combines electromigration to enable carbonate ions to quickly enter cement-based specimens under the action of an electric field, achieving full carbonization while greatly reducing the carbonization time. The degree of carbonization completion can be observed in real time through the terminal display screen, further ensuring the adequacy of carbonization or mineralization.

[0035] This system allows carbonate ions to migrate into the interior of a specimen with a certain water content, and can directly react with alkaline components such as calcium hydroxide and hydrated calcium silicate. It has no special requirements for various test conditions, making the entire operation process simpler and more convenient.

[0036] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to make the purpose, technical solutions and beneficial effects of the present invention more clear, the present invention provides the following drawings for illustration.

[0038] Figure 1 A system that accelerates carbonization or mineralization by electrifying the cementitious substrate.

[0039] Figure 2 A top view of carbon dioxide entering the solution.

[0040] Figure 3 The operation process of the device and system.

[0041] Figure 4 The graph shows the predicted change of carbonate ion concentration over time.

[0042] In the figure, 1 is the terminal display screen, 2 is the valve, 3 is the carbon dioxide delivery pipeline, 4 is the electrode plate, 5 is the insulation layer, 6 is deionized water, 7 is area one, 8 is the carbonate ion concentration measuring instrument, 9 is the cement-based test piece, 10 is the built-in layered box of the filter cloth filled with sodium hydroxide crystals, 11 is the carbon dioxide pressure detector, 12 is area two, 13 is area three, and 14 is the rubber layer that is permeable to ions but not permeable to water. DETAILED DESCRIPTION

[0043] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0044] like Figure 1 As shown, the cement substrate electrification accelerated carbonization or mineralization system provided in this embodiment includes a test bench, which is provided with a carbonate ion generation unit, a specimen tank, an electric field acceleration unit, and a carbonization state detection unit;

[0045] The carbonate ion generating unit is used to generate carbonate ions required for the carbonization reaction in the test piece;

[0046] The test piece slot is used to place the test piece;

[0047] The electric field acceleration unit is arranged on both sides of the test piece slot, and is used to apply a voltage to the test piece to accelerate the migration of carbonate ions;

[0048] The carbonization state detection unit is used to determine the carbonization degree of the test piece by detecting the concentration of carbonate ions passing through the test piece;

[0049] The carbonate ion generating unit includes a solution tank, a gas delivery device, and a measuring device;

[0050] The lower portion of the solution tank is configured as a solution portion (first region) for accommodating a saturated sodium hydroxide solution, the upper portion of the solution tank is configured as a gas portion (second region) for accommodating carbon dioxide gas, the measuring device is disposed in the solution portion for measuring the carbonate ion concentration in the solution; the gas delivery device is configured to deliver carbon dioxide gas to the gas portion in the solution tank;

[0051] The measuring device in this embodiment is a carbonate ion concentration detection unit;

[0052] The gas delivery device includes a carbon dioxide delivery pipeline, a valve, and a carbon dioxide pressure detector; the carbon dioxide delivery pipeline is used to deliver carbon dioxide gas to the test bench; the valve is arranged on the carbon dioxide delivery pipeline to control the on-off state of the carbon dioxide gas delivery; the carbon dioxide pressure detector is arranged in the gas section to detect the carbon dioxide gas pressure;

[0053] The valve is connected to a processor, and a control signal is generated through analysis and processing by the processor, thereby realizing an intelligent control process of the valve.

[0054] The top of the solution tank is equipped with sodium hydroxide crystals wrapped in a filter cloth. When a sodium hydroxide solution is needed, water can be added to the solution tank. When the water submerges the sodium hydroxide crystals, a saturated sodium hydroxide solution is formed in the solution tank. A box is provided within the filter cloth, containing multiple layers of sodium hydroxide crystals. A predetermined concentration of sodium hydroxide solution can be obtained by varying the immersion depth. Thus, sodium hydroxide solutions of varying concentrations can be obtained, or a saturated sodium hydroxide solution can be obtained, by controlling the amount of water added.

[0055] In this embodiment, the sodium hydroxide crystals are contained in the filter cloth, which can ensure that the sodium hydroxide solution is in a saturated state, thereby obtaining a stable concentration of carbonate ions.

[0056] In this embodiment, the rubber layer is permeable to ions but not to water, and the electrode plate has water-permeable holes, which allow the solutions in area 1 and area 3 to pass through the holes. However, due to the effect of the rubber layer, the solutions cannot directly contact the test piece.

[0057] The carbonate ion generating unit further includes a carbon dioxide intake control unit, which is used to determine the on / off state of the valve according to the carbon dioxide pressure so as to be suitable for delivering carbon dioxide gas into the solution tank;

[0058] This embodiment utilizes a carbon dioxide intake control unit to control a stable carbon dioxide supply, and combines this with a saturated sodium hydroxide solution to maintain a constant reaction rate between carbon dioxide and sodium hydroxide, thereby obtaining a sodium carbonate solution with a stable concentration. Simultaneously, the power supply size and electric field strength are maintained constant, and the ion migration speed is stabilized, thereby maintaining a stable carbonate ion concentration.

[0059] like Figure 2 As shown, Figure 2 Schematic diagram of carbon dioxide extending into the solution. In this embodiment, the carbonate ion concentration can be detected in real time. The real-time measured carbonate ion concentration in the left test tank is used to coordinately control the amount of CO2 introduced, the introduction rate, and the CO2 pressure.

[0060] At the same time, the system also includes a display device, which includes a display screen and a processing and analysis unit; the carbon dioxide pressure detector and the measuring device are respectively connected to the processing and analysis unit; the display screen is used to output the detection result data of the carbon dioxide pressure detector; and is used to output the detection result of the carbonate ion concentration in the solution portion by the measuring device;

[0061] The electric field acceleration unit includes an anode plate, a cathode plate, and a power supply; the anode plate and the cathode plate are respectively connected to the power supply, and the anode plate and the cathode plate are respectively arranged on both sides of the test piece. The electric field formed by the anode plate and the cathode plate is used to migrate the carbonate ions in the solution into the test piece;

[0062] In this embodiment, a rubber membrane can be used to separate the solution from the test piece to ensure that the movement of ions is formed by the action of the electric field, that is, a rubber membrane is added between the test piece and the solution, which is permeable to carbonate ions but impermeable to water.

[0063] The carbonization state detection unit includes a deionized water tank, one side of which is used to place a test piece and receive carbonate ions passing through the test piece; a detector for detecting the concentration of carbonate ions is provided in the deionized water tank; the detector is connected to a display device and displays the carbonate ion concentration in the deionized water tank on the display screen;

[0064] The display screen in this embodiment is used to display fluctuations in carbon dioxide pressure values, changes in carbonate ion concentration, etc.; the electrode plates therein can provide a stable electric field to achieve directional movement of ions;

[0065] The wall of the water tank in this embodiment is provided with an insulating layer; the inner wall of the entire device is provided with an insulating layer, the main function of which is to prevent the test piece and the solution from being conductive and causing leakage, thereby ensuring the safety of the test process.

[0066] The solution tank in this embodiment is a portion of the area in the figure, which includes two stages, wherein the first stage is a saturated sodium hydroxide solution, and the second stage is a sodium hydroxide and sodium carbonate solution;

[0067] The deionized water tank in this embodiment is area three, in which a carbonate ion concentration measuring instrument is provided to monitor the concentration of carbonate ions in area three;

[0068] In this embodiment, the gas portion above the solution tank is region 2, in which a carbon dioxide pressure detector is provided for monitoring the pressure of carbon dioxide in region 2. Region 2 is initially filled with air and then filled with carbon dioxide gas.

[0069] The following describes in detail the principle and operation process of the cement substrate electrification accelerated carbonization or mineralization system:

[0070] 1) Place the cement-based specimen between two electrode plates;

[0071] 2) Open the valve to allow carbon dioxide to enter area 2 through the carbon dioxide delivery pipeline;

[0072] 3) In area 1, carbon dioxide reacts chemically with saturated sodium hydroxide solution, and the reaction formula is:

[0073] 2NaOH+CO2→Na2CO3+H2O;

[0074] The generated sodium carbonate exists in the form of carbonate ions and sodium ions. At the same time, area 2 is filled with carbon dioxide and has a certain pressure. The carbon dioxide concentration in area 2 can be indirectly monitored using the terminal display screen through a carbon dioxide pressure detector and replenished in time to ensure that the carbonate ion concentration in area 1 is stable in the second stage.

[0075] 4) After a certain concentration of sodium carbonate solution is obtained, at this time, area 1 is in the second stage, and sodium hydroxide has not completely converted into sodium carbonate, the positive plate is connected to the right side of the specimen, the negative plate is connected to the left side of the specimen and the electrode plate power is turned on, and the electric migration acceleration method is used to make carbonate ions quickly enter the specimen and migrate to the positive plate under the action of the electric field;

[0076] 5) In the specimen, carbonate ions react chemically with alkaline components such as calcium hydroxide and hydrated calcium silicate to form dense materials. The main reaction formula is:

[0077] Ca(OH)2+CO3 2- →CaCO3↓+2OH - ;

[0078] 3Ca2SiO2.3H2O+CO3 2- →3CaCO3↓+2SiO2+3H2O;

[0079] 6) Area three contains deionized water. A carbonate ion concentration meter is installed on the bottom side to effectively monitor the concentration of carbonate ions. The change in the concentration over time is recorded and displayed on the terminal display screen to determine the degree of carbonation of the cement-based specimen.

[0080] like Figure 3 As shown, Figure 3 The method for accelerating carbonization or mineralization of a cement substrate by electrifying the cement substrate comprises the following steps:

[0081] S1: Place the test object, i.e., the cement-based specimen, between the electrode plates;

[0082] S2: Open the valve to allow carbon dioxide to enter area 1 and fill area 2, forming a stable pressure in area 2; after obtaining a mixed solution of sodium hydroxide and sodium carbonate, close the valve;

[0083] S3: Turn on the power supply, and the electric field between the electrode plates accelerates the carbonate ions to move in a directional manner and react with the alkaline components inside the specimen;

[0084] S4: Monitor the carbon dioxide pressure in area 2 and the sodium carbonate concentration in area 3 through a monitoring instrument; display a concentration change graph on a display screen; and determine the degree of carbonization or mineralization completion;

[0085] In this embodiment, after turning on the power supply, since there is an excess of sodium hydroxide crystals in region one, the sodium hydroxide in region one can be replenished in real time to maintain its concentration stable. In addition, since the electrode plate causes the carbonate ions to move in a directional manner, it can be regarded as consuming carbonate ions all the time, and the gaseous carbon dioxide in region two can react with sodium hydroxide in real time to generate new sodium carbonate, so that the entire region one is always in a state of mixing sodium hydroxide and sodium carbonate. By controlling the running time through the carbonate ion concentration graph in region three on the terminal display screen, test pieces with different degrees of carbonization can be obtained. By monitoring the concentration of carbonate ions in region three and reflecting its change graph over time through the terminal display screen, when the graph shows a linear growth trend, it can be judged that the cement-based test piece has completed mineralization.

[0086] The system of accelerating carbonization or mineralization by electrifying the cement matrix can achieve the following functions:

[0087] 1. Electricity-accelerated carbonization: Using the electric migration method, carbonate ions are accelerated to migrate in a directional manner under the action of the electric field, quickly entering the interior of the cement-based specimen and reacting chemically with alkaline components such as calcium hydroxide and hydrated calcium silicate to form dense materials, thus achieving electric-accelerated carbonization.

[0088] 2. Electricity is applied to cement-based specimens to accelerate carbonization or mineralization:

[0089] ① By monitoring the concentration of carbonate ions in area 3 and displaying its change over time on the terminal display screen, when the graph shows a certain regular growth trend, it can be determined that the cement-based specimen is in the complete carbonization or mineralization stage;

[0090] ② Different cement-based specimens are placed in the device and the carbonization time is controlled to be the same, so as to observe and compare their carbonization resistance.

[0091] like Figure 4 As shown, Figure 4This is a prediction graph of the change of carbonate ion concentration over time. In section 0a (time T1), the carbonate ion concentration is 0. It can be inferred that during this time period, the carbonate ions are fully reacted by the alkaline components inside the specimen; in section ab (stage T1-T2), carbonate ions begin to appear, but the growth of carbonate ions is unstable and shows nonlinear growth. It can be inferred that at this time, the alkaline components inside the specimen are gradually consumed, but mineralization is not completely achieved; after point b (time T2), the carbonate ion concentration shows a linear increase. It can be inferred that point b is the time node when the specimen is completely mineralized.

[0092] The system provided in this embodiment is further provided with an automatic carbonization degree identification module, which is processed by an operating program provided in the single chip microcomputer so that carbonization can be automatically terminated when the carbonate ion concentration increases linearly.

[0093] In this embodiment, the carbonate ion concentration in Zone 1 is maintained within a stable range by the carbon dioxide inlet control unit and by maintaining the sodium hydroxide solution at a constant saturated state. As long as the power supply remains constant and the electric field strength is constant, the carbonate ion migration rate remains stable. The carbonate ion concentration in Zone 3's deionized water tank is only affected by consumption.

[0094] In addition, this system monitors the growth of carbonate ion concentration in the deionized water tank to indirectly observe and analyze the degree of carbonation or mineralization of cement-based specimens, making it visual. This system can also be used to compare the carbonation resistance of different cement-based specimens.

[0095] The above embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. A system for accelerating carbonization or mineralization of cement substrates by electrification, including a test bench, characterized by: The test bench is provided with a carbonate ion generating unit, a specimen tank, an electric field acceleration unit, and a carbonization or mineralization state detection unit; The carbonate ion generating unit is used to generate carbonate ions required for the carbonization reaction in the test piece; The test piece slot is used to place the test piece; The electric field acceleration unit is arranged on both sides of the test piece slot, and is used to apply a voltage to the test piece to accelerate the migration of carbonate ions; The carbonization or mineralization state detection unit is used to determine the carbonization degree of the test piece by detecting the concentration of carbonate ions passing through the test piece; The electric field acceleration unit includes an anode plate, a cathode plate, and a power supply; the anode plate and the cathode plate are respectively connected to the power supply and are respectively arranged on both sides of the test piece. The electric field formed by the anode plate and the cathode plate is used to accelerate the migration of carbonate ions in the solution into the test piece; a rubber membrane is added between the test piece and the solution, which is permeable to carbonate ions but not water. The carbonization state detection unit includes a deionized water tank, one side of which is used to set the test piece and receive carbonate ions passing through the test piece; the deionized water tank is provided with a detector for detecting the carbonate ion concentration.

2. The cement-based material electrification-accelerated carbonization or mineralization system according to claim 1, characterized in that: The carbonate ion generating unit includes a solution tank, a gas delivery device, and a measuring device; The lower part of the solution tank is configured as a solution part for accommodating a saturated sodium hydroxide solution, the upper part of the solution tank is a gas part for accommodating carbon dioxide gas, the measuring device is arranged in the solution part for measuring the carbonate ion concentration in the solution; the gas delivery device is used to deliver carbon dioxide gas to the gas part in the solution tank.

3. The cement-based material electrification-accelerated carbonization or mineralization system according to claim 2, characterized in that: The gas delivery device includes a carbon dioxide delivery pipeline, a valve, and a carbon dioxide pressure detector; the carbon dioxide delivery pipeline is used to deliver carbon dioxide gas to the test bench; the valve is arranged on the carbon dioxide delivery pipeline to control the on-off state of the carbon dioxide gas delivery; the carbon dioxide pressure detector is arranged in the gas part to detect the carbon dioxide gas pressure.

4. The cement-based material electrification-accelerated carbonization or mineralization system according to claim 1, wherein: The carbonate ion generating unit further includes a carbon dioxide intake control unit, which is used to determine the on / off state of the valve according to the carbon dioxide pressure, so as to be suitable for delivering carbon dioxide gas into the solution tank.

5. The cement-based material electrification-accelerated carbonization or mineralization system according to claim 3, characterized in that: It also includes a display device, which includes a display screen and a processing and analysis unit; the carbon dioxide pressure detector and the measuring device are respectively connected to the processing and analysis unit; the display screen is used to output the detection result data of the carbon dioxide pressure detector; and is used to output the detection result of the measuring device on the carbonate ion concentration in the solution portion.

6. A method for carbonizing or mineralizing a cement-based material using the system for accelerating carbonization or mineralization by electrification according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: Place the test object, i.e., the cement-based specimen, between the electrode plates; S2: Open the valve to allow carbon dioxide to enter area 1 and fill area 2, forming a stable pressure in area 2; after obtaining a mixed solution of sodium hydroxide and sodium carbonate, close the valve; S3: Turn on the power supply, and the electric field between the electrode plates accelerates the carbonate ions to move in a directional manner and react with the alkaline components inside the specimen; S4: Monitor the carbon dioxide pressure in area 2 and the sodium carbonate concentration in area 3 in real time through monitoring instruments; display a concentration change graph on a display screen; and determine the degree of completion of carbonization or mineralization.

7. The method for accelerating carbonization or mineralization of a cement substrate by applying electricity as claimed in claim 6, wherein: After turning on the power in step S3, the carbonization process is performed according to the following steps. The specific steps are as follows: Excess sodium hydroxide crystals are placed in area 1 to maintain the concentration of sodium hydroxide solution in area 1; By inputting gaseous carbon dioxide into area 2 to react with sodium hydroxide to generate new sodium carbonate, the entire area 1 is in a state of mixing sodium hydroxide and sodium carbonate.

8. The method for accelerating carbonization or mineralization of a cement substrate by applying electricity as claimed in claim 6, wherein: After turning on the power in step S3, the mineralization process is performed according to the following steps. The specific steps are as follows: By monitoring the concentration of carbonate ions in area three and displaying its change over time on the terminal display screen, when the graph shows a linear growth trend, it can be determined that the cement-based specimen has completed mineralization; By controlling the running time through the regional tricarbonate ion concentration graph on the terminal display, specimens with different carbonization degrees can be obtained.

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