Concrete chloride ion penetration resistance test device

Abstract

The utility model discloses a concrete chloride ion resistance penetration test device and relates to a device capable of being used for a penetration test. The utility model aims to provide the concrete chloride ion penetration resistance test device which is accurate in test data and convenient to use. The concrete chloride ion penetration resistance test device comprises a lower base, an electrolytic cell and a loading device, the electrolytic cell comprises an anode electrolytic cell and a cathode electrolytic cell, the loading device comprises a pressing plate cushion layer and a pressing plate, a lower pressing plate is arranged above the lower base, a lower pressing plate cushion layer is arranged in the middle of the lower pressing plate, and the upper pressing plate cushion layer is arranged in the middle of the lower pressing plate. The anode electrolytic bath and the cathode electrolytic bath are arranged on the left side and the right side of the lower pressing plate cushion layer respectively and above the lower pressing plate and the electrolytic bath, the upper pressing plate is arranged above the electrolytic bath, the upper pressing plate cushion layer is arranged above the upper pressing plate, and the sealing ring is arranged between the anode electrolytic bath and the cathode electrolytic bath. An area defined by the interior of the sealing ring, the lower pressing plate cushion layer and the upper pressing plate is a test tank, and the two electrolytic tanks are connected with a positive electrode and a negative electrode of a chloride ion impermeability tester respectively.

Description

Technical Field

[0001] The utility model relates to the technical field of penetration test, in particular to a device for testing the chloride ion penetration resistance of concrete. Background Art

[0002] Concrete refers to an engineering composite material prepared from cementitious materials. Generally, cement is used as the cementitious material, sand and stone are used as aggregates, and they are mixed with water in a certain proportion and then stirred into cement concrete. It is often used in construction and civil engineering and is a widely used inorganic non-metallic material.

[0003] In some projects in coastal and saline-alkali areas, large-scale concrete infrastructure is in a chloride ion erosion environment for a long time. Chloride ion erosion will cause the corrosion of steel bars in the concrete of a large number of buildings, the peeling off of the protective layer, the reduction of bearing capacity, and even the collapse and failure of the structure. Improving the chloride ion penetration resistance of concrete can optimize the durability of buildings and reduce costs.

[0004] However, in actual engineering applications, the vast majority of concrete is affected by many factors such as loads and external environmental media. The load has a very important influence on the penetration of chloride ions in concrete, which is very different from the test results without load influence in the laboratory, resulting in the durability of many reinforced concrete in actual projects being much lower than the durability predicted by the test. In addition, the devices for testing chloride ion penetration on the market at present are relatively complex to install and have poor sealing performance. If not sealed well, it is necessary to unload and reinstall, resulting in low work efficiency. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a device for testing the chloride ion penetration resistance of concrete with accurate test data and convenient use.

[0006] A device for testing the chloride ion penetration resistance of concrete according to the utility model includes a lower base, an electrolytic cell, and a loading device. The electrolytic cell includes an anode electrolytic cell and a cathode electrolytic cell. The loading device includes upper and lower sets of pressure plate cushions and pressure plates. A lower pressure plate is arranged above the lower base, and a lower pressure plate cushion is arranged in the middle of the lower pressure plate. The anode electrolytic cell and the cathode electrolytic cell are respectively arranged on the left and right sides of the lower pressure plate cushion and above the lower pressure plate. An upper pressure plate is arranged above the anode electrolytic cell and the cathode electrolytic cell, and an upper pressure plate cushion is arranged above the upper pressure plate. A sealing ring is arranged between the anode electrolytic cell and the cathode electrolytic cell. The area enclosed by the inside of the sealing ring, the lower pressure plate cushion, and the upper pressure plate is the test cell. The anode electrolytic cell and the cathode electrolytic cell are respectively connected to the positive and negative electrodes of a chloride ion permeability tester.

[0007] The utility model relates to a device for testing the chloride ion penetration resistance of concrete. Each of the upper and lower sides of the anode electrolytic cell and the cathode electrolytic cell is provided with a concave groove. The loading device further includes an upper limiting sliding rod and a lower limiting sliding rod, and the concave grooves on the upper and lower sides are respectively connected to the upper limiting sliding rod and the lower limiting sliding rod.

[0008] The utility model relates to a device for testing the chloride ion penetration resistance of concrete. The concave groove is connected to the upper limiting sliding rod and the lower limiting sliding rod through a buckle and a fixing pin.

[0009] The utility model relates to a device for testing the chloride ion penetration resistance of concrete. The upper limiting sliding rod is arranged below the upper pressure plate, and the lower limiting sliding rod is arranged above the lower base.

[0010] The utility model relates to a device for testing the chloride ion penetration resistance of concrete. Metal conductive rods are respectively arranged at the lower parts of the anode electrolytic cell and the cathode electrolytic cell, and the metal conductive rods are connected to a chloride ion impermeability tester through wires.

[0011] The difference between the device for testing the chloride ion penetration resistance of concrete of the utility model and the prior art lies in that a loading device is arranged between the anode electrolytic cell and the cathode electrolytic cell of the device for testing the chloride ion penetration resistance of concrete of the utility model, and the concrete test piece is placed in the test tank surrounded by the electrolytic cell and the loading device, so that the data of the chloride ion penetration of the concrete test block under the loading state can be obtained during the test, and the measured data is relatively accurate. When installing the concrete test piece, the test block to be tested is directly placed between the two electrolytic cells, which is convenient for loading and unloading and has good sealing performance.

[0012] In addition, the utility model has the advantages of simple operation, beautiful appearance, good stability, strong adaptability, and can also improve the work efficiency of relevant technicians.

[0013] The following further describes a device for testing the chloride ion penetration resistance of concrete of the utility model with reference to the accompanying drawings. Description of the Drawings

[0014] Figure 1 It is a schematic structural diagram of a device for testing the chloride ion penetration resistance of concrete of the utility model;

[0015] Figure 2 It is a schematic structural diagram of the lower base of a device for testing the chloride ion penetration resistance of concrete of the utility model;

[0016] Figure 3 It is a schematic connection diagram of the anode electrolytic cell and the upper limiting sliding rod of a device for testing the chloride ion penetration resistance of concrete of the utility model;

[0017] The markings in the figure are indicated as follows: 1 - upper platen cushion; 2 - upper platen; 3 - upper limiting sliding rod; 4 - strip groove; 5 - cathode electrolytic cell; 6 - concrete test block; 7 - sealing ring; 8 - metal conducting rod; 9 - lower limiting sliding rod; 10 - lower base; 11 - fixing pin; 12 - anode electrolytic cell; 13 - wire connection hole; 14 - wire; 15 - buckle; 16 - concave groove. Detailed implementation mode

[0018] The following embodiments are used to illustrate the present utility model, but do not limit the scope of the present utility model.

[0019] Embodiment

[0020] As Figure 1 shown, a concrete chloride ion penetration resistance test device of the present utility model includes a lower base 10, an electrolytic cell and a loading device. The electrolytic cell includes an anode electrolytic cell 12 and a cathode electrolytic cell 5. Concave grooves 16 are respectively arranged on the upper and lower sides of the anode electrolytic cell 12 and the cathode electrolytic cell 5. The lower base 10 is installed below the electrolytic cell, and the loading device is installed on the upper and lower sides of the electrolytic cell.

[0021] The loading device includes upper and lower groups of platen cushions, platens and limiting sliding rods. As Figure 2 shown, the lower limiting sliding rod 9 is fixedly installed on the lower base 10. A lower platen is arranged above the lower limiting sliding rod 9, and a lower platen cushion is arranged in the middle above the lower platen. The anode electrolytic cell 12 and the cathode electrolytic cell 5 are respectively arranged on the left and right sides of the lower platen cushion and above the lower platen. The concave grooves 16 below the anode electrolytic cell 12 and the cathode electrolytic cell 5 are respectively connected to the lower limiting sliding rod 9 through buckles 15 and fixing pins 11. The lower limiting sliding rod 9 can limit the movement of the anode electrolytic cell 12 and the cathode electrolytic cell 5. As Figure 3 shown, the concave grooves 16 above the anode electrolytic cell 12 and the cathode electrolytic cell 5 are respectively connected to the upper limiting sliding rod 3 through buckles 15 and fixing pins 11. A strip groove 4 is arranged below the upper limiting sliding rod 3, and the strip groove 4 is in contact with the top of the electrolytic cell. The upper limiting sliding rod 3 is fixed below the upper platen 2, and an upper platen cushion 1 is installed above the upper platen 2. The upper platen cushion 1 is in contact with the pressure device. Two platen cushions are arranged up and down in this device, ensuring the uniformity of the stress surface.

[0022] A sealing ring 7 is arranged between the anode electrolytic cell 12 and the cathode electrolytic cell 5. The area enclosed between the inside of the sealing ring 7, the lower platen cushion and the upper platen 2 is a test tank for placing a concrete test block 6. The sealing ring 7 is in close contact with the concrete test piece, ensuring the tight seal at the test piece and the electrolytic cell and forming an electrical circuit. The upper and lower sides of the concrete test block 6 and the sealing ring 7 are respectively in contact with the upper platen 2 and the lower platen. The concrete test block 6 is a cylindrical test piece with a diameter of 100 ± 10 mm and a height of 50 ± 5 mm.

[0023] Metal conductive rods 8 are respectively arranged at the lower parts of the anode electrolytic cell 12 and the cathode electrolytic cell 5. The metal conductive rods 8 are connected to the wires 14, and the wires 14 extend to the outside of the device. The wires 14 connecting the anode electrolytic cell 12 and the cathode electrolytic cell 5 are respectively connected to the positive electrode and the negative electrode of the chloride ion impermeability tester.

[0024] Before the test of a concrete chloride ion penetration test device of the present utility model, the concrete test piece is first formed and cured, and the concrete test piece is vacuum water-retained with distilled water or deionized water; the concrete test piece is taken out and installed on the test tank, and the anode and cathode electrolytic cells are placed on the lower limiting sliding rod 9 and fixed with the buckle 15 and the fixing pin 11. Distilled water or deionized water is added to the two electrodes to ensure that the device is not water-permeable, that is, it reaches a sealed state; after checking the sealing performance between the concrete test piece and the test tank, a NaCl solution with a mass concentration of 3.0% and a NaOH solution with a molar concentration of 0.3 mol / L are respectively injected into the anode electrolytic cell 12 and the cathode electrolytic cell 5 of the test piece and are respectively connected to the positive electrode and the negative electrode of the chloride ion permeation instrument; after correctly connecting the power cord, the power should be turned on while keeping the electrolytic cell full of the solution, and a DC constant voltage of 60V±0.1V is applied to the above-mentioned electrolytic cell, and the initial current reading I0 is recorded; at the beginning, the current value is recorded every 5 minutes. When the change of the current value is small, the current value can be recorded every 10 minutes; when the change of the current is very small, the current value is recorded every 30 minutes until the power is on for 6 hours; during this process, the stability of the upper pressing plate cushion 1 is adjusted to keep it in a horizontal state, and a compressive load is applied to the concrete test piece, but the compressive load shall not damage the structure of the test piece. After stabilization, keep this load, and read the final electric flux value on the chloride ion permeation instrument after 6 hours of power on.

[0025] A concrete chloride ion penetration test device of the present utility model is connected to the electrolytic cell by setting a limiting sliding rod that can slide, and a loading device is arranged in the middle. The test block to be tested is directly placed between the two electrolytic cells and fixed with a buckle, realizing that the test block can be loaded and unloaded without using a screwdriver, saving time and effort, being convenient and fast, and having good sealing performance. The present utility model can also detect the chloride ion penetration situation under the loading action, and the measured data is relatively accurate. In addition, the present utility model has the advantages of simple operation, beautiful appearance, good stability, strong adaptability, and can also improve the work efficiency of relevant technical personnel.

[0026] Although the present utility model has been described in detail with general descriptions and specific embodiments above, based on the present utility model, some modifications or improvements can be made, which are obvious to those skilled in the art. Therefore, these modifications or improvements made without departing from the spirit of the present utility model all fall within the scope of protection required by the present utility model.

Claims

1. A device for testing the chloride ion penetration resistance of concrete, characterized in that: It includes a lower base, an electrolytic cell and a loading device. The electrolytic cell includes an anode electrolytic cell and a cathode electrolytic cell. The loading device includes upper and lower sets of pressing plate cushions and pressing plates. A lower pressing plate is arranged above the lower base, and a lower pressing plate cushion is arranged in the middle of the lower pressing plate. The anode electrolytic cell and the cathode electrolytic cell are respectively arranged on the left and right sides of the lower pressing plate cushion and above the lower pressing plate. An upper pressing plate is arranged above the anode electrolytic cell and the cathode electrolytic cell, and an upper pressing plate cushion is arranged above the upper pressing plate. A sealing ring is arranged between the anode electrolytic cell and the cathode electrolytic cell. The area enclosed by the inside of the sealing ring, the lower pressing plate cushion and the upper pressing plate is the test tank. The anode electrolytic cell and the cathode electrolytic cell are respectively connected to the positive and negative electrodes of the chloride ion impermeability tester.

2. The concrete chloride ion penetration test device according to claim 1, wherein: A concave groove is arranged on each of the upper and lower sides of the anode electrolytic cell and the cathode electrolytic cell. The loading device further includes an upper limiting sliding rod and a lower limiting sliding rod. The concave grooves on the upper and lower sides are respectively connected to the upper limiting sliding rod and the lower limiting sliding rod.

3. The concrete chloride ion penetration test device according to claim 2, characterized in that: The concave groove is connected to the upper limiting sliding rod and the lower limiting sliding rod through a buckle and a fixing pin.

4. A device for testing the chloride ion penetration resistance of concrete according to claim 2, characterized in that: The upper limiting sliding rod is arranged below the upper pressing plate, and the lower limiting sliding rod is arranged above the lower base.

5. The concrete chloride ion penetration test device according to claim 1, characterized in that: Metal conductive rods are respectively arranged at the lower parts of the anode electrolytic cell and the cathode electrolytic cell. The metal conductive rods are connected to the chloride ion impermeability tester through wires.

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