CN205209921U - RIM testing arrangement - Google Patents

Abstract

The utility model discloses a RIM testing arrangement. Including test host computer and at least one test tank who is equipped with cathodic electrolysis liquid, the negative pole has been put in the cathodic electrolysis liquid, there is an inclined plane test tank inside, and the inclined plane overhead has the rubber sleeve of slope, inside concrete sample and the anode liquor of being equipped with of rubber sleeve, and the concrete sample is fixed in the rubber sleeve bottom, has put the positive pole in the anode liquor, positive pole and negative pole are connected with the test host computer respectively, its characterized in that, and including sealed box, test tank arrange in sealed box, including leading to the line hole on the tank wall of sealed box, positive pole and negative pole with test the electric wire that the host computer is connected and pass the logical line hole of sealing up the box. The utility model discloses an adopt the environment of inclosed experiment, can guarantee not only that electrolyte does not take place to decompose, moreover can the inside temperature of single control box, test data is comparatively accurate, reliably spends higherly.

Description

A kind of RIM testing device

[technical field]

The utility model relates to an iodine ion penetration test on the concrete surface, in particular to a RIM test device.

[Background technique]

Reinforced concrete structure combines the advantages of steel bars and concrete, and has a low cost. It is the preferred form in the design of civil engineering structures. Its application range is very wide and it is the most commonly used structural form. But this does not mean that the reinforced concrete structure is perfect. In fact, during the more than 100 years when concrete was used in civil engineering, a large number of reinforced concrete structures failed prematurely due to various reasons, and did not reach the scheduled service life. Caused by unfavorable changes in service loads, but more often due to insufficient durability of the structure. Especially for concrete structures in coastal and offshore areas, due to the corrosion of concrete by the marine environment, the corrosion of steel bars leads to early damage to the structure and reduces the durability of the structure. This has become an important problem in practical engineering. At present, there are many test methods in the laboratory to evaluate the performance of concrete against the diffusion of chloride ions. The permeation process studied by various permeability test methods and the principles on which they are based are different. The ultimate goal is to calculate the diffusion coefficient of chloride ions. , thus contributing to the accurate prediction of the structural life. Therefore, relevant research at home and abroad mainly focuses on the diffusion coefficient of chloride ions, but the determination of the diffusion coefficient of concrete structures containing chloride ions remains to be resolved.

The ability to resist chloride ion penetration is an effective indicator for evaluating the durability of high-performance concrete. At present, the most commonly used method for measuring the permeability coefficient of concrete is the unsteady electromigration test (RCM). This method was originally established by Tang and later formed the Build492 specification. However, when the concrete contains too much chloride ions, the chloride ions in the structure will also migrate under the action of an electric field and react with the indicator. These two effects will affect the accuracy of the RCM test results. When the chloride ion contained exceeds a certain limit, the RCM test method will not be able to measure the chloride ion diffusion coefficient of the structure, and a new RIM test method is required.

The RIM test is an unsteady iodine ion rapid diffusion (RapidIodineMigration, RIM) test. However, the current RIM test equipment still uses RCM test equipment.

The invention with the patent number CN200820302173.9 discloses a concrete RCM chloride ion diffusion coefficient & electric flux multifunctional tester, including RCM chloride ion diffusion coefficient test equipment, electric flux test equipment and a test host; RCM chloride ion diffusion coefficient The test equipment comprises at least one solution vessel (10) containing catholyte, and a cathode (18) is placed in the catholyte (11); the inside of the solution vessel has an inclined surface, and an inclined silicone rubber sleeve ( 16), the silicone rubber sleeve is supported by the bracket (12), and the concrete specimen (25) and the anolyte (14) are housed inside it, and the concrete specimen (25) is fixed on the bottom of the silicone rubber sleeve, and the anolyte An anode (15) and a temperature sensor (13) are provided.

Because the RIM test method needs to introduce iodide ion into the drug is NaI, NaI is different from the RCM test method to introduce chloride ion Nacl. Sodium iodide is deliquescent, and it absorbs moisture in humid air and agglomerates. In contact with air, iodine can be separated and separated, and it is easy to decompose when exposed to light. Therefore, the reliability of the RIM test using the above-mentioned RCM chloride ion diffusion coefficient test equipment is not high, and the test data cannot meet the accuracy requirements.

[Content of the invention]

The technical problem to be solved by the utility model is to provide a RIM test device with high test data reliability.

In order to solve the above-mentioned technical problems, the technical solution adopted by the utility model is, a kind of RIM test device, comprises test main frame, sealed casing and at least one test cell that catholyte is housed, is equipped with negative electrode in catholyte; Test cell There is an inclined surface inside, and an inclined rubber sleeve is placed on the inclined surface. The concrete specimen and the anolyte are installed inside the rubber sleeve. The concrete specimen is fixed at the bottom of the rubber sleeve, and the anode is placed in the anolyte. Connection; the test tank is arranged in a sealed box, and the wall of the sealed box includes a wire hole, and the wires connecting the anode and the cathode to the test host pass through the wire hole of the sealed box.

In the RIM testing device described above, a temperature control system is housed in the sealed box, and the temperature control system includes a micro air conditioner and a thermometer.

In the RIM test device described above, a cover plate is installed on the top of the test tank, and the cover plate includes a wire hole, and the wires connecting the anode and the cathode to the test host pass through the wire hole on the cover plate.

In the RIM test device described above, the bottom surface of the test tank is a slope, and the bottom of the test tank is connected to the drain pipe, and the inlet of the drain pipe is located at the low point of the slope; the drain pipe passes through the side wall of the sealed box, and the drain The outlet of the liquid pipe is equipped with a valve.

In the RIM test device described above, each test tank includes a plurality of partitions, the partitions divide the test tank into a plurality of sample fixing slots, and the rubber sleeve is placed on the slope of each sample fixing slot.

The above-mentioned RIM test device includes a plurality of test slots, and the test slots are detachably fixed on the bottom plate of the sealed box by screws.

In the above-mentioned RIM test device, the test host is an unsteady-state diffusion coefficient tester.

The RIM test device of the utility model adopts a closed test environment, which not only can ensure that the electrolyte does not decompose, but also can independently control the internal temperature of the box, and the test data is more accurate and the reliability is higher.

[Description of drawings]

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Fig. 1 is the front view of the RIM testing device of the embodiment of the present invention.

Fig. 2 is a top view of the RIM testing device of the embodiment of the present invention.

Fig. 3 is a right view of the RIM testing device of the embodiment of the present invention.

Fig. 4 is a cross-sectional view taken along line A in Fig. 2 .

Fig. 5 is a cross-sectional view along B direction in Fig. 4 .

Fig. 6 is a sectional view taken along direction C in Fig. 4 .

[detailed description]

The structure of the utility model embodiment RIM testing device is as shown in Figure 1 to Figure 6, comprises the non-steady-state diffusion coefficient tester 200 and test equipment 200 as test host computer, and test equipment 200 comprises the sealing box body 1 that plastics is made and Three test tanks 2 filled with catholyte are arranged side by side, and each test tank 2 is detachably fixed on the bottom plate of the sealed box 1 by four screws 20 . When the test tank breaks down or the loose screw 20 needs to be cleaned, the test tank is taken out.

The test tank 2 is made of hardened plastic. There are two partitions 203 in each test tank 2, and the partitions 203 divide the test tank 2 into three sample fixing tanks.

There is a bracket in each sample fixing groove, and there is a 30° inclined plane 201 on the bracket, and an inclined rubber sleeve 3 is placed on the inclined plane 201, and the concrete specimen 300 and the anolyte are housed inside the rubber sleeve 3, and the concrete specimen 300 It is fixed on the bottom of the rubber sleeve 3, and the cathode spoon is placed in the catholyte;

Three test tanks 2 are arranged in the sealed box body 1 , and a cover plate 201 is installed on the top of the test tank 2 , and there are three through-wire holes 202 on the cover plate 201 . The top plate 101 of the sealed box 1 is integral and can be opened by a rotating shaft. There are nine wire holes 102 on the top plate 101. The wires 4 of the anode spoon and the cathode spoon pass through the wire holes 202 on the cover plate 201 and the sealed box The through hole 102 of the body 1 is connected with an unsteady state diffusion coefficient tester 200 .

The bottom surface of the test tank 2 is a slope of 5°, which is convenient for the waste liquid to be discharged by gravity from the waste liquid port at the low point of the slope surface. The waste liquid port at the low point of the slope surface at the bottom of the test tank 2 is connected to the drain pipe 6; The side wall of the sealed casing 1 extends to the outside, and the outlet of the discharge pipe 6 is equipped with a valve 7 .

A temperature control system is housed in the sealed box body 1, and the temperature control system includes a micro-air conditioner 5 and a thermometer 8, which can control the box body to reach the temperature required for the experiment under the sealed condition. Provide a good RIM experimental test solution storage and reaction environment.

When carrying out the RIM test in the embodiment of the utility model, the above-mentioned test device and at least one set of concrete test pieces are used, and each set of concrete test pieces includes three cylindrical test pieces with a diameter of 100 mm and a height of 50 mm. In order to test different concretes, three groups of different concrete specimens can be made and tested at the same time.

Concrete specimens need to be pretreated, and the pretreatment includes placing the concrete specimens with the upper and lower surfaces in a dry state in a vacuum container for vacuum treatment; during vacuum treatment, reduce the air pressure in the vacuum container to 1-5kPa within 5 minutes, And it should be kept under vacuum for 3 hours; while the vacuum pump is still running, inject saturated calcium hydroxide solution into the vacuum container to immerse the test piece. After the specimen is submerged, the vacuum container returns to normal pressure after 1 hour, and the concrete specimen is soaked under normal pressure for 20 hours.

In addition to the upper and lower surfaces of the concrete specimen, the surrounding surfaces are sealed with a waterproof layer, such as epoxy resin or paraffin waterproof layer for sealing.

Take the relatively flat surface of the concrete as the permeable surface and place it in the rubber sleeve 3 facing downward. Pour the configured catholyte and anolyte into the designated positions respectively, the catholyte is NaI solution with a mass percentage concentration of 23.78%, and the anolyte is KOH aqueous solution with a molar concentration of 0.3mol/L; and according to the set Voltage, current and time run the non-steady-state diffusion coefficient tester to conduct electrification tests on concrete specimens.

After the power-on test, take the concrete specimen out of the rubber sleeve, immediately rinse the surface of the concrete specimen with tap water, and split the concrete specimen into two semi-cylindrical bodies along the axial direction of the concrete specimen on the pressure testing machine. After the split surface of the concrete specimen is slightly dry, the acetic acid solution with a mass percentage of 50% is sprayed first, the potassium iodate sprayed with a mass percentage of 3%, and then the starch suspension with a mass percentage of 5%. Measure the penetration depth of iodide ions. Then measure the iodide ion color depth of the concrete specimen.

The determination method of the iodide ion permeability coefficient refers to the NTBuild492-1999.11 "ChlorideMigrationCoefficient fromNon-steady-stateMigrationExperiments" method or the standard for the long-term performance and durability of ordinary concrete (GB/T50082-2009).

Claims (7)

1. a RIM proving installation, comprises the test flume that Test Host is equipped with catholyte with at least one, is equipped with negative electrode in catholyte; There is an inclined-plane test flume inside, inclined-plane is equipped with the rubber sleeve of inclination, and concrete sample and anolyte are equipped with in rubber sleeve inside, and concrete sample is fixed on bottom rubber sleeve, is equipped with anode in anolyte; Anode is connected with Test Host respectively with negative electrode, it is characterized in that, comprise seal case, described test flume is arranged in seal case, the tank wall of seal case comprises threading hole, and the electric wire that anode and negative electrode are connected with Test Host is through the threading hole of seal case.

2. RIM proving installation according to claim 1, is characterized in that, seal case is built with temperature control system, and temperature control system comprises mini air conditioner and temperature meter.

3. RIM proving installation according to claim 1, is characterized in that, cover plate is equipped with at the top of test flume, and cover plate comprises threading hole, and the electric wire that anode and negative electrode are connected with Test Host is through the threading hole on cover plate.

4. RIM proving installation according to claim 1, is characterized in that, test flume bottom surface is domatic, and the bottom of test flume connects discharging tube, and the entrance of discharging tube is positioned at domatic low spot position; Discharging tube is through the sidewall of seal case, and valve is equipped with in the outlet of discharging tube.

5. RIM proving installation according to claim 1, is characterized in that, each test flume comprises multiple plurality of partitions, and test flume is separated into a plurality of sample fixing by dividing plate, and the inclined-plane of each sample fixing is equipped with described rubber sleeve.

6. RIM proving installation according to claim 1, is characterized in that, comprises a plurality of test flume, and test flume is removably fixed on the base plate of seal case by screw.

7. RIM proving installation according to claim 1, is characterized in that, described Test Host is Unsteady Casting ratio test instrument.