Concrete carbonization test device

Abstract

The utility model discloses a concrete carbonization test device, which relates to the technical field of concrete carbonization tests, and comprises a concrete test piece box body, a heating system, a cooling system, a temperature regulation and control system, a heat conduction rubber pad, a storage battery and a temperature sensor, the temperature regulation and control system is arranged on the front side of the concrete test piece box body, the heating system, the cooling system, the temperature sensor and the storage battery are all arranged in the concrete test piece box body, and the heating system, the cooling system, the storage battery and the temperature sensor are all electrically connected with the temperature regulation and control system through wires. The device is reasonable in design, the environment temperature of the concrete carbonization test piece can be accurately regulated and controlled, and the temperature change condition of concrete in actual engineering can be simulated.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete carbonization test, and more specifically to the technical field of a concrete carbonization test device. Background Art

[0002] The carbonization performance of concrete is one of the main indicators of its durability. The carbonization process reduces the protective effect of concrete on internal steel bars, thereby increasing the risk of concrete structure failure and causing serious impact on the safe use and life of the structure. Studies have shown that environmental temperature conditions are one of the important factors affecting the carbonization rate of concrete. At present, the concrete carbonization test conducted in the laboratory can only maintain a temperature condition within a fixed period, and the next period of testing can only be carried out after the data measurement is completed, which reduces the efficiency and practicality of the concrete carbonization test.

[0003] There are many temperature changes in the actual concrete carbonization process. The existing concrete carbonization test chambers on the market cannot achieve accurate temperature changes during the carbonization test, and cannot measure concrete carbonization data at multiple temperatures in one test cycle. As a result, the data obtained from the concrete carbonization test cannot truly reflect the carbonization process of concrete in actual projects, and the test cycle is long and inefficient. Therefore, it cannot simulate the carbonization condition of concrete in actual projects very well. Utility Model Content

[0004] The purpose of the utility model is to solve the above technical problems. The utility model provides a concrete carbonization test device. The device can be used to simulate temperature changes in actual projects. The data obtained from the concrete carbonization test can better reflect the carbonization of concrete in actual projects and improve the efficiency of concrete testing. The concrete carbonization test device can perform temperature change concrete carbonization tests, can avoid wax sealing, and can perform carbonization depth detection without removing the test piece.

[0005] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0006] The utility model provides a concrete carbonization test device, comprising a concrete test piece box, a heating system, a cooling system, a temperature control system, a heat-conducting rubber pad, a battery and a temperature sensor;

[0007] The temperature control system is arranged on the front of the concrete specimen box, and the heating system, cooling system, temperature sensor and battery are arranged inside the concrete specimen box. The heating system, cooling system, battery and temperature sensor are electrically connected to the temperature control system by wires.

[0008] Specifically, the temperature control system is set on the front of the box to facilitate real-time observation of the ambient temperature of the concrete specimen. The heating system, cooling system, and temperature sensor are connected to the temperature control system with wires. After the temperature control system receives the temperature signal from the temperature sensor, it compares it with the preset temperature and controls the operation and stop of the heating system and the cooling system.

[0009] In one embodiment, the temperature control system includes a controller housing, a controller disposed in the controller housing, and a display screen disposed on the controller housing and electrically connected to the controller. The controller housing is fixedly disposed on the front side of the concrete specimen box, and the controller housing is provided with wire holes that allow the wires of the heating system, the wires of the cooling system, the wires of the battery, and the wires of the temperature sensor to pass through.

[0010] In one embodiment, side cover assemblies are provided on both sides of the concrete specimen box, and a protective gas delivery mechanism is connected to the side cover assemblies. Each side cover assembly is detachably fixed to both sides of the concrete specimen box by a bolt assembly.

[0011] In one embodiment, the side cover plate assembly includes a side cover plate and an air hole arranged on the side cover plate, and the protective gas delivery mechanism is connected to the air hole.

[0012] In one embodiment, the protective gas delivery mechanism includes a gas storage bottle and a rubber tube connected between the gas storage bottle and the gas hole.

[0013] The gas cylinder is a CO2 gas cylinder, and the side cover is a square cover with air holes provided thereon to facilitate the entry of CO2 gas.

[0014] In one embodiment, the concrete specimen box is a double-layer structure, comprising an inner concrete specimen bin and an outer shell, the concrete specimen bin is used to store concrete specimens, and the battery is located at the bottom between the outer wall of the concrete specimen bin and the inner wall of the shell.

[0015] In one embodiment, a 5 mm thick thermal conductive rubber pad is provided on the inner wall of the concrete specimen chamber.

[0016] In one embodiment, at least two handles are provided on the outer shell.

[0017] Specifically, the concrete specimen box is divided into two layers, the inner layer is a concrete specimen bin welded with copper plates for storing concrete specimens (taking the following length, width and height of the concrete specimen as an example: length 405mm, width 110mm, height 110mm), and the contact surface between the concrete specimen bin and the specimen is provided with a 5mm thick thermal conductive rubber pad for sealing.

[0018] In one embodiment, the heating system is a serpentine heating wire arranged on one side of the inner wall of the concrete specimen chamber.

[0019] In one embodiment, the cooling system includes a plurality of semiconductor refrigeration plates arranged on the concrete specimen, and a heat dissipation water tank arranged between the outer wall of the concrete specimen chamber and the inner wall of the outer shell.

[0020] Specifically, since the temperature of one side of the semiconductor refrigeration plate decreases and the temperature of the other side increases when the semiconductor refrigeration plate is working, setting up a heat dissipation water tank can volatilize the heat generated by the semiconductor refrigeration plate when working, effectively improving the service life of the equipment.

[0021] The usage process is as follows:

[0022] Before the test begins, first import the temperature data obtained through field research into the temperature control system, clean the surface of the prismatic concrete specimen, paste the temperature sensor, and place the concrete specimen in the concrete specimen bin. Before the concrete carbonization test, check the carbonization test device to see if the temperature sensor, heating system, cooling system, and temperature control system can work properly. If they can, start the test. If not, readjust the concrete carbonization test device. After the debugging is completed, proceed as follows (the concrete specimen is a prismatic concrete specimen of 100mm×100mm×400mm):

[0023] Step 1, prepare a concrete carbonization specimen, and prepare a 100mm×100mm×400mm prism concrete specimen according to the test requirements; after the concrete specimen is prepared, put it into a standard curing room for curing for 28 days, take it out of the standard curing room 2 days before the test, and then bake it at 60°C for 48 hours;

[0024] Step 2, clean the surface of the cured prismatic concrete specimen, attach a temperature sensor to the surface of the prismatic concrete specimen and place it in a concrete carbonization test device;

[0025] Specifically, after the temperature sensor is attached to the side, the concrete specimen is placed into the concrete specimen bin through the square entrance on the side.

[0026] Step 3: According to the test needs, determine the different temperature changes required for the carbonization test and import them into the temperature control system. Obtain detailed local temperature changes through field surveys, input the temperature changes obtained through field surveys into the temperature control system, and turn on the switch at the beginning of the test. The temperature control system will control the operation and stop of the heating system or cooling system according to the temperature difference between the preset temperature and the temperature sensor to reach the preset temperature.

[0027] Step 4, start the test. There are air holes on the side square cover to ensure that CO2 gas can enter the test box smoothly.

[0028] Step 5, take out the test pieces at 3d, 7d, 14d, and 28d, respectively, and use a core drill to drill out four cylinders with a diameter of 20mm and a length of 400mm for carbonization data measurement.

[0029] After the test begins, the carbon dioxide concentration and humidity in the concrete specimen chamber should be measured at regular intervals. It is advisable to measure once every 2 hours in the first 2 days, and once every 4 hours thereafter. During the test, these parameters should be adjusted at any time according to the measured carbon dioxide concentration and humidity. After each drilling is completed at 3d, 7d, and 14d, the drilled hole should be sealed with a glass plate to prevent CO2 gas from entering from the cylindrical hole.

[0030] The beneficial effects of the utility model are as follows:

[0031] 1. This device can accurately control the ambient temperature of concrete carbonization specimens and simulate the temperature changes encountered by concrete in actual projects.

[0032] 2. This device can carry out concrete carbonization tests at different temperatures in the same carbonization test chamber, thus improving the efficiency of the test.

[0033] 3. This device is sealed with a heat-conducting rubber pad and is reusable, which is in line with the concept of saving and green.

[0034] 4. This device is equipped with handles on both sides of the concrete specimen box to facilitate the transportation of the concrete specimen. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a structural schematic diagram of the utility model;

[0037] Figure 2 It is a schematic diagram of the cooling system of the utility model patent;

[0038] Figure 3 It is a schematic diagram of the heating system of the utility model patent;

[0039] Figure 4 It is a schematic diagram of the conductor of the utility model patent;

[0040] Figure numerals: 1-outer shell, 2-temperature control system, 3-side cover, 4-gas cylinder, 5-air hole, 6-rubber tube, 7-thermal conductive rubber pad, 8-concrete specimen compartment, 9-screw hole, 10-handle, 11-heating wire, 12-battery, 13-semiconductor refrigeration plate, 14-heating water tank, 15-temperature sensor, 16-wire, 17-wire hole, 18-concrete specimen. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0044] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present invention 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 the present invention.

[0045] Example 1

[0046] like Figures 1 to 4 As shown, this embodiment provides a concrete carbonization test device, including a concrete specimen box, a heating system, a cooling system, a temperature control system 2, a thermally conductive rubber pad 7, a battery 12 and a temperature sensor 15;

[0047] The temperature control system 2 is arranged on the front of the concrete specimen box, and the heating system, cooling system, temperature sensor 15 and battery 12 are all arranged inside the concrete specimen box. The heating system, cooling system, battery 12 and temperature sensor 15 are all electrically connected to the temperature control system 2 by wires 16.

[0048] Specifically, the temperature control system 2 is arranged on the front side of the box body to facilitate real-time observation of the ambient temperature of the concrete specimen 18. The heating system, the cooling system, and the temperature sensor 15 are all connected to the temperature control system 2 by wires 16. After the temperature control system 2 receives the temperature signal from the temperature sensor 15, it compares it with the preset temperature and controls the operation and stop of the heating system and the cooling system.

[0049] Example 2

[0050] This embodiment is further optimized on the basis of embodiment 1, specifically:

[0051] The temperature control system 2 includes a controller housing, a controller arranged in the controller housing, and a display screen arranged on the controller housing and electrically connected to the controller. The controller housing is fixedly arranged on the front side of the concrete specimen box. The controller housing is provided with a wire hole 17 that allows the wire 16 of the heating system, the wire 16 of the cooling system, the wire 16 of the battery 12 and the wire 16 of the temperature sensor 15 to pass through.

[0052] Side cover plate 3 assemblies are provided on both sides of the concrete specimen box, and a protective gas delivery mechanism is connected to the side cover plate 3 assemblies. Each side cover plate 3 assembly is detachably fixed to both sides of the concrete specimen box by a bolt assembly.

[0053] The side cover plate 3 assembly includes the side cover plate 3 and the air hole 5 arranged on the side cover plate 3 , and the protective gas delivery mechanism is connected with the air hole 5 .

[0054] The protective gas delivery mechanism comprises a gas cylinder 4 and a rubber tube 6 connected between the gas cylinder 4 and the gas hole 5 .

[0055] Specifically, the gas cylinder 4 is a CO2 gas cylinder 4, and the side cover plate 3 is a side square cover plate, which is provided with air holes 5 to facilitate the entry of CO2 gas.

[0056] Example 3

[0057] This embodiment is further optimized on the basis of embodiment 2, specifically:

[0058] The concrete specimen box is a double-layer structure, comprising an inner concrete specimen bin 8 and an outer shell 1 . The concrete specimen bin 8 is used to store concrete specimens 18 , and the battery 12 is located at the bottom between the outer wall of the concrete specimen bin 8 and the inner wall of the outer shell 1 .

[0059] A 5 mm thick heat-conducting rubber pad 7 is arranged on the inner wall of the concrete specimen chamber 8 .

[0060] At least two handles 10 are arranged on the outer shell 1 .

[0061] Specifically, the concrete specimen box is divided into two layers, the inner layer is a concrete specimen bin 8 welded with copper plates for storing concrete specimens 18 (taking the following length, width and height of the concrete specimen 18 as an example: length 405mm, width 110mm, height 110mm), and the contact surface between the concrete specimen bin 8 and the specimen is provided with a 5mm thick thermal conductive rubber pad 7 for sealing.

[0062] Example 4

[0063] This embodiment is further optimized on the basis of embodiment 3, specifically:

[0064] The heating system is a serpentine heating wire 11 arranged on one side of the inner wall of the concrete specimen chamber 8 .

[0065] The cooling system includes a plurality of semiconductor cooling plates 13 arranged on the concrete specimen 18 , and a heat dissipation water tank 14 arranged between the outer wall of the concrete specimen chamber 8 and the inner wall of the outer shell 1 .

[0066] Specifically, since the temperature of one side of the semiconductor refrigeration plate 13 decreases while the temperature of the other side increases when the semiconductor refrigeration plate 13 is working, the heat dissipation water tank 14 can volatilize the heat generated by the semiconductor refrigeration plate 13 when working, thereby effectively improving the service life of the device.

[0067] The usage process is as follows:

[0068] Before the test begins, the temperature data obtained through field research is first imported into the temperature control system 2, the surface of the prismatic concrete specimen 18 is cleaned and the temperature sensor 15 is attached, and the concrete specimen 18 is placed in the concrete specimen bin 8. Before the concrete carbonization test, the carbonization test device is checked to see whether the temperature sensor 15, the heating system, the cooling system and the temperature control system 2 can work normally. If they can, the test is started. If not, the concrete carbonization test device needs to be readjusted. After the debugging is completed, the following steps are performed (the concrete specimen 18 selects a prismatic concrete specimen 18 of 100mm×100mm×400mm):

[0069] Step 1, preparing a concrete carbonization specimen, and preparing a 100 mm×100 mm×400 mm prism concrete specimen 18 according to the test requirements; after the concrete specimen 18 is prepared, it is placed in a standard curing room for curing for 28 days, taken out of the standard curing room 2 days before the test, and then baked at 60° C. for 48 hours;

[0070] Step 2, clean the surface of the cured prismatic concrete specimen 18, attach a temperature sensor 15 to the surface of the prismatic concrete specimen 18 and place it in a concrete carbonization test device;

[0071] Specifically, after the temperature sensor 15 is attached to the side, the concrete specimen 18 is placed into the concrete specimen bin 8 through the square entrance on the side.

[0072] Step 3, according to the test needs, determine the different temperature changes required for the carbonization test, and import them into the temperature control system 2. Obtain the detailed local temperature changes through field surveys, and input the temperature changes obtained through field surveys into the temperature control system 2. When the switch is turned on at the beginning of the test, the temperature control system 2 will control the operation and stop of the heating system or the cooling system according to the temperature difference between the preset temperature and the temperature sensor 15 to reach the preset temperature.

[0073] Step 4, start the test, the side square cover is provided with air holes 5 to ensure that CO2 gas can enter the test piece box smoothly.

[0074] Step 5, take out the test pieces at 3d, 7d, 14d, and 28d, respectively, and use a core drill to drill out four cylinders with a diameter of 20mm and a length of 400mm for carbonization data measurement.

[0075] After the test begins, the carbon dioxide concentration and humidity in the concrete specimen chamber 8 should be measured at regular intervals. It is advisable to measure once every 2 hours in the first 2 days, and once every 4 hours thereafter. During the test, these parameters should be adjusted at any time according to the measured carbon dioxide concentration and humidity. After each drilling is completed at 3d, 7d, and 14d, a glass plate is used to seal the drilled hole to prevent CO2 gas from entering from the cylindrical hole.

Claims

1. A concrete carbonization test device, characterized in that: It comprises a concrete specimen box, a heating system, a cooling system, a temperature control system (2), a heat-conducting rubber pad (7), a storage battery (12) and a temperature sensor (15); The temperature control system (2) is arranged on the front of the concrete specimen box, the heating system, the cooling system, the temperature sensor (15) and the storage battery (12) are all arranged inside the concrete specimen box, and the heating system, the cooling system, the storage battery (12) and the temperature sensor (15) are all electrically connected to the temperature control system (2) by a wire (16).

2. A concrete carbonization test device according to claim 1, characterized in that: The temperature control system (2) comprises a controller housing, a controller arranged in the controller housing, and a display screen arranged on the controller housing and electrically connected to the controller. The controller housing is fixedly arranged on the front side of the concrete specimen box. The controller housing is provided with a wire hole (17) for allowing a wire (16) of the heating system, a wire (16) of the cooling system, a wire (16) of the battery (12), and a wire (16) of the temperature sensor (15) to pass through.

3. A concrete carbonization test device according to claim 1, characterized in that: Side cover plate (3) assemblies are arranged on both sides of the concrete specimen box, and a protective gas delivery mechanism is connected to the side cover plate (3) assemblies. Each of the side cover plate (3) assemblies is detachably fixed to the two sides of the concrete specimen box by a bolt assembly.

4. A concrete carbonization test device according to claim 3, characterized in that: The side cover plate (3) assembly comprises a side cover plate (3) and an air hole (5) arranged on the side cover plate (3), and the protective gas delivery mechanism is in communication with the air hole (5).

5. A concrete carbonization test device according to claim 4, characterized in that: The protective gas delivery mechanism comprises a gas storage bottle (4) and a rubber tube (6) connected between the gas storage bottle (4) and the gas hole (5).

6. A concrete carbonization test device according to claim 1, characterized in that: The concrete specimen box has a double-layer structure, comprising an inner concrete specimen bin (8) and an outer outer shell (1), the concrete specimen bin (8) being used to store concrete specimens (18), and the storage battery (12) being located at the bottom between the outer wall of the concrete specimen bin (8) and the inner wall of the outer shell (1).

7. A concrete carbonization test device according to claim 6, characterized in that: A layer of 5 mm thick heat-conducting rubber pad (7) is arranged on the inner wall of the concrete specimen bin (8).

8. A concrete carbonization test device according to claim 6, characterized in that: At least two handles (10) are provided on the outer shell (1).

9. A concrete carbonization test device according to claim 6, characterized in that: The temperature-raising system is a serpentine heating wire (11) arranged on one side of the inner wall of the concrete specimen bin (8).

10. A concrete carbonization test device according to claim 6, characterized in that: The cooling system comprises a plurality of semiconductor refrigeration plates (13) arranged on the concrete specimen (18), and a heat dissipation water tank (14) arranged between the outer wall of the concrete specimen chamber (8) and the inner wall of the outer shell (1).

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