CN217819926U - Electric field acceleration experiment device for concrete material corrosion - Google Patents

Abstract

The utility model provides an electric field acceleration experiment device for concrete material corrosion, which relates to the technical field of concrete experiments, can apply different current acceleration effects on different concrete or clean slurry test blocks in a carbonate solution, simulate the environmental state of concrete work under the carbonate-rich environmental condition and accelerate corrosion, and has great significance for the concrete research under the new condition; the device comprises a power supply, a positive electrode, a negative electrode, an anode solution tank, a cathode solution tank, an experimental mould, a mould tank and a plurality of conducting wires; the anode solution tank, the mould tank and the cathode solution tank are sequentially connected, and respective corresponding solutions are arranged in the anode solution tank, the mould tank and the cathode solution tank; the positive electrode is arranged in the anode solution tank, and the negative electrode is arranged in the cathode solution tank; the experimental mould is arranged in the mould box; the positive and negative output ends of the power supply are respectively connected with the positive electrode and the negative electrode through conducting wires; the experimental mould is internally provided with a block to be tested.

Description

An electric field accelerated experimental device for corrosion of concrete materials

technical field

The utility model relates to the technical field of concrete experiments, in particular to an electric field acceleration experiment device for concrete material corrosion.

Background technique

As the center of gravity of my country's engineering construction gradually shifts to the southwest mountainous area, the proportion of tunnels in newly built railways or highways is increasing year by year, and some line tunnels often need to pass through karst karst areas. The karst karst area is a typical landform unique to the limestone area, and the environment is rich in a large amount of carbonate ions. When the railway or highway tunnel passes through the karst karst area, the primary support and secondary lining concrete of the tunnel may be damaged by erosive carbonate corrosion, and the concrete will "collapse" and "mud", seriously affecting the durability of the tunnel concrete structure sex and safety.

In the traditional concrete experiment process, the concrete carbonate corrosion test equipment generally can only apply the carbonate corrosion solution on the concrete test block, and the deterioration rate of the concrete is relatively slow. At present, the existing concrete experimental instruments can only carry out immersion experiments of carbonate corrosion of concrete with reference to sulfate corrosion. Accelerated experiments on sulfate corrosion of concrete can be accelerated by means of dry-wet cycle, etc., but such a design cannot be applied to carbonate corrosion of concrete.

Most of the concrete experimental devices now soak concrete in carbonate solution, and the deterioration and destruction time of concrete is very long, especially for the high-strength and high-performance concrete commonly used at present, it is difficult to be damaged in general immersion. This can only adapt to the basic requirements of concrete experiments in the past, but cannot adapt to the changes in new experimental conditions brought about by the development of science.

Therefore, the utility model researches an electric field accelerated experimental device for corrosion of concrete materials to deal with the deficiencies of the prior art, so as to solve or alleviate one or more of the above-mentioned problems.

Utility model content

In view of this, the utility model provides an electric field acceleration experimental device for concrete material corrosion, which can apply different current acceleration effects to different concrete or clean slurry test blocks in carbonate solution, and simulate the environment conditions rich in carbonate The environmental conditions under which the concrete works and accelerates corrosion are of great interest for the study of concrete under new conditions.

The utility model provides an electric field accelerated experimental device for corrosion of concrete materials, which is characterized in that the device includes: a power supply, a positive electrode, a negative electrode, an anode solution box, a cathode solution box, an experimental mold, a mold box and several conductive wires;

The anode solution box, the mold box and the cathode solution box are connected in sequence, and each corresponding solution is provided inside;

The positive electrode is arranged in the anode solution box, the negative electrode is arranged in the cathode solution box; the experimental mold is arranged in the mold box;

The positive and negative output ends of the power supply are respectively connected to the positive electrode and the negative electrode through conductive wires;

A block to be tested is set in the experimental mold.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, the block to be tested is a concrete test block and/or a clean slurry test block.

According to the foregoing aspect and any possible implementation manner, an implementation manner is further provided, wherein the power supply is a pulse generating power supply.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, wherein the output voltage and/or output current of the pulse generating power supply is adjustable.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, wherein the material of the experimental mold is a plexiglass plate or an acrylic plate.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, the solution in the mold box is a carbonate solution, and the carbonate solution is immersed in the experimental mold.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, the solution in the anode solution tank is a K ₂ CO ₃ solution.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, the solution in the cathode solution tank is Na ₂ CO ₃ solution.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, the concentration of carbonate ions in the solutions in the anode solution tank and the cathode solution tank are consistent.

According to the above aspect and any possible implementation manner, an implementation manner is further provided, wherein both the positive electrode and the negative electrode use titanium rods.

According to the above-mentioned aspect and any possible implementation mode, an implementation mode is further provided, the conductive wire includes a conductive copper wire in the middle and alligator clips made of conductive material provided at both ends of the conductive copper wire; The alligator clip is fixedly connected to the conductive copper wire.

Compared with the prior art, one of the above-mentioned technical solutions has the following advantages or beneficial effects: the electric field acceleration experimental device for concrete material corrosion of the utility model solves the problem that the original concrete experimental device can only carbonate the concrete material. The problem of slow corrosion rate and low efficiency caused by salt immersion corrosion can accelerate the deterioration and destruction of concrete materials in carbonate solution, which is of positive significance for the research and solution of such problems.

Of course, implementing any product of the present utility model does not necessarily need to achieve all the technical effects described above at the same time.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained based on these drawings without creative effort.

Fig. 1 is the principle schematic diagram of the electric field accelerated experimental device of concrete material corrosion provided by an embodiment of the utility model;

Fig. 2 is the schematic diagram of the clean slurry test block mold structure provided by one embodiment of the utility model;

Fig. 3 is a side view structural diagram of a concrete test block mold provided by an embodiment of the present invention.

Among them, in the figure:

1. Power supply; 2. Positive pole; 3. Negative pole; 4. Experimental mold; 5. Anode solution box; 6. Cathode solution box; 7. Conductive wire.

Detailed ways

In order to better understand the technical solution of the utility model, the embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings.

It should be clear that the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

For the deficiencies in the prior art, the utility model provides a kind of electric field accelerated experimental device of concrete material corrosion, as shown in Figure 1, this experimental device comprises: power supply 1, positive electrode 2 and negative electrode 3, anode solution box 5, negative electrode Solution box 6, anode solution, cathode solution, experimental mold 4 and several conductive wires 7. The power source 1 is electrically connected to the positive electrode 2 and the negative electrode 3 respectively through conductive wires 7 , the positive electrode 2 is set in the anode solution box 5 , and the negative electrode 3 is set in the cathode solution box 6 . Anodic solution is housed in the anolyte solution box 5, and cathodic solution is housed in the cathodic solution box 6, and the positive and negative electrodes are respectively connected with the solutions in the respective solution boxes, and both the anolyte solution and the catholyte solution have electrical conductivity. The experimental mold 4 is arranged between the anode solution box 5 and the cathode solution box 6 , and its two ends are respectively connected with the anode solution box 5 and the cathode solution box 6 .

The connection mode between the experimental mold 4 and the anode and cathode solution boxes is as follows: the experimental mold 4 is set in the mold box, the mold box is provided with a carbonate solution, and the carbonate solution is electrically connected with the anode solution and the cathode solution. During the test, the experimental mold 4 is immersed in the carbonate solution, and the sample to be tested, such as concrete to be tested, is placed in the experimental mold 4 .

The above-mentioned connection arrangement makes the power supply, the positive electrode, the positive electrode solution, the carbonate solution in the mold box, the cathode solution, the negative electrode and then to the power supply form a current loop, thereby realizing the accelerated corrosion of the block to be tested.

The utility model uses a pulse generating power supply as an electric field generating device (that is, the power supply 1 is a pulse generating power supply), which can adjust the voltage and current; the positive and negative electrodes adopt titanium rods, and have good conductivity.

The experimental mold 4 adopts a split and detachable form, which is divided into two sizes: clean slurry and concrete. The concrete mold is made of acrylic plate material. During the experiment, the concrete test block or clean slurry test block to be tested is directly placed in the experimental mold, and according to the experimental requirements, the power is turned on to generate current, and the concrete test block or clean slurry test block soaked in a specific carbonate solution is tested. Periodic electric field accelerates. After the experiment is over, turn off the power, disassemble the mold, and take out the concrete test block or clean slurry test block.

The power supply 1 includes a casing, a power supply body disposed inside the casing, and a current regulating instrument and a switch device arranged outside the casing. The current regulating instrument and the switching device are connected to the power supply body for turning on or off the power supply body, and adjusting the power supply body output parameters. One end of the positive electrode 2 is connected to the positive output terminal of the power supply 1 through a conductive wire 7, and the other end of the positive electrode 2 is placed in the anode solution tank 5; one end of the negative electrode 3 is connected to the negative pole of the power supply 1 through another conductive wire 7 The output ends are connected, and the other end of the negative electrode 3 is placed in the cathode solution box 6 . The experimental mold 4 is placed in the mold box, and enough solution is provided in the mold box to ensure that the solution soaks the experimental mold 4 completely. The pH value of the solution in the mold box depends on the environment of the block to be tested to be simulated.

Further, the pulse generating power supply is used as an electric field generating device to perform periodic electric field acceleration, and the electric field cycle can be 10s on and 10s off, and so on. The electric field voltage of the pulse generating power supply is up to 30V.

Further, the experimental mold 4 is made of a plexiglass plate or an acrylic plate. The experimental mold adopts a split and detachable row structure. The concrete specimen is placed in the mold, and the baffles on both sides of the mold contacting the solution are detachable, which is detachable relative to the mold box, as shown in Figure 2. Both sides of the specimen are soaked in the cathode and anode solutions, and the baffles between the experimental specimens cannot be disassembled.

Further, the mold is divided into a concrete test block mold and a clean slurry test block mold. The concrete test block mold is a cube with a size of 100mm×100mm×100mm, as shown in Figure 3; the clean slurry test block mold is a cube with a size of 30mm×30mm×30mm ,as shown in picture 2.

Further, the conductive wire 7 is made of ordinary conductive copper wire, and both ends are provided with alligator clips for connecting the ends with electrodes or power output terminals.

Before the experiment, the erosion solution (mainly the electric field cathode Na ₂ CO ₃ solution and the anode K ₂ CO ₃ solution) was placed in the anode solution box 5 and the cathode solution box 6 respectively. The concentration of carbonate ions is the same, turn on the pulse power supply 1 switch, and conduct the current to the positive electrode 2 and the negative electrode 3 through the conductive wire 7. During the experiment, the concrete test block and/or the clean slurry test block are respectively loaded into the experimental mold 4, and start Carry out the experiment. After the experiment is over, turn off all the switches, disassemble the experimental mold screws, and take out the concrete or clean slurry test block for subsequent experiments. This solves the problem that the current concrete experimental device can only perform carbonate immersion corrosion on concrete at a natural speed. To accelerate the simulation of the deterioration and failure process of concrete in karst karst areas.

The electric field accelerated experimental device for concrete material corrosion provided in the embodiment of the present application has been introduced in detail above. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present application, there will be changes in the specific implementation and application scope. To sum up, the contents of this specification should not be understood as limiting the application.

It should also be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a good or system comprising a set of elements includes not only those elements but also includes items not expressly listed. other elements of the product, or elements inherent in the commodity or system. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the article or system comprising said element. "Approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error range and basically achieve the technical effect.

The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. As used in the embodiments of the present invention and the appended claims, the singular forms "a", "said" and "the" are also intended to include plural forms unless the context clearly indicates otherwise. Those skilled in the art can understand the specific meanings of these terms in this application according to specific situations. The term "and/or" used in this article is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and/or B, which can mean: A exists alone, A and B exist simultaneously, and A and B exist alone. There are three cases of B. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

Claims (10)

1. An electric field acceleration experiment device for concrete material corrosion, which is characterized by comprising: the device comprises a power supply, a positive electrode, a negative electrode, an anode solution tank, a cathode solution tank, an experimental mould, a mould tank and a plurality of conducting wires;

the anode solution tank, the die tank and the cathode solution tank are sequentially connected, and corresponding solutions are respectively arranged in the anode solution tank, the die tank and the cathode solution tank;

the positive electrode is arranged in the anode solution tank, and the negative electrode is arranged in the cathode solution tank; the experimental mould is arranged in the mould box;

the positive and negative output ends of the power supply are respectively connected with the positive electrode and the negative electrode through conducting wires;

the experimental mould is internally provided with a block to be tested.

2. The electric field acceleration experiment device for concrete material corrosion according to claim 1, wherein the test block is a concrete test block and/or a paste test block.

3. The electric field acceleration experiment device for concrete material corrosion of claim 1, wherein the power supply is a pulse generation power supply.

4. The electric field acceleration experiment device for concrete material corrosion of claim 3, wherein the output voltage and/or the output current of the pulse generation power supply is adjustable.

5. The electric field acceleration experimental device for concrete material corrosion of claim 1, wherein the experimental mold is made of organic glass plate or acrylic plate.

6. The electric field accelerated test device of concrete material corrosion of claim 1, wherein the solution in the mold box is a carbonate solution, and the carbonate solution submerges the test mold.

7. The electric field accelerated test device for concrete material corrosion according to claim 1, wherein the solution in the anode solution tank is K ₂ CO ₃ And (3) solution.

8. The electric field acceleration experimental device for concrete material corrosion according to claim 1, wherein the solution in the cathode solution tank is Na ₂ CO ₃ And (3) solution.

9. The electric field acceleration experimental device for concrete material corrosion according to claim 1, wherein the positive electrode and the negative electrode both use titanium rods.

10. The electric field acceleration experiment device for concrete material corrosion according to claim 1, wherein the conductive wire comprises a conductive copper wire and alligator clips made of a conductive material and arranged at two ends of the conductive copper wire; the crocodile clip is fixedly connected with the conductive copper wire.

Images