Chlorine resistance test device for grouting sample

Abstract

The utility model relates to the technical field of chlorine resistance tests, in particular to a chlorine resistance test device for a grouting sample. The chlorine resistance test device for the grouting sample specifically comprises a test cylinder, a chlorine injection mechanism and a pressurization mechanism, the test cylinder comprises a cylinder body, the cylinder body comprises a first chamber and a second chamber, and a grouting sample is placed in the first chamber; the chlorine injection mechanism is located in the second cavity and communicates with the first cavity. The pressurizing mechanism is in sliding connection with the first cavity and is connected with the grouting sample in an abutting mode. The device disclosed by the utility model has the advantage of detecting the strength and long-term erosion resistance of the grouting sample.

Description

Technical Field

[0001] The utility model relates to the technical field of chlorine resistance test, in particular to a chlorine resistance test device for a grouting sample. Background Art

[0002] For areas with abundant groundwater, especially in coastal cities, groundwater contains a large amount of chloride ions, which seriously corrode grouting materials, affect the durability of grouting materials, and ultimately reduce the service life of the project. The construction effect on site is often not intuitive, and the strength and long-term corrosion resistance of the grouting samples need to be tested. Existing equipment cannot solve this problem well.

[0003] Therefore, in view of the shortcomings of the prior art, a chlorine resistance test device for a grouting sample is provided. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a chlorine resistance testing device for a grouting sample, which is intended to solve the problem that the strength and long-term corrosion resistance of the grouting sample cannot be tested.

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

[0006] A chlorine resistance test device for a grouting sample, comprising: a test tube, a chlorine injection mechanism and a pressurizing mechanism;

[0007] The test cylinder comprises a cylinder body, the cylinder body comprises a first chamber and a second chamber, and the grouting sample is placed in the first chamber;

[0008] The chlorine injection mechanism is located in the second chamber and communicates with the first chamber;

[0009] The pressurizing mechanism is slidably connected to the first chamber, and the pressurizing mechanism is abuttly connected to the grouting sample.

[0010] As a further improvement of the technical solution of the utility model, it also includes a supporting mechanism, which includes a base and a supporting frame, the base is fixedly connected to the supporting frame, the cylinder is located on the base, and the pressurizing mechanism is mounted on the supporting frame.

[0011] As a further improvement of the technical solution of the utility model, the support frame includes a column, an intermediate support beam, an upper support beam and a connecting rod. The intermediate support beam and the upper support beam are both fixedly connected to the column. One end of the connecting rod is fixedly connected to the intermediate support beam, and the other end is fixedly connected to the cylinder.

[0012] As a further improvement of the technical solution of the utility model, the pressurizing mechanism includes a force beam, a hydraulic rod, a pressing rod and a piston assembly, the force beam is fixedly connected to the upper support beam, the hydraulic rod is located above the force beam, the pressing rod is fixedly connected to the hydraulic rod, and the pressing rod is fixedly connected to the piston assembly.

[0013] As a further improvement of the technical solution of the utility model, the chlorine injection mechanism includes a chlorinated salt water tank, a submersible pump and a water injection pipe. The submersible pump is located in the chlorinated salt water tank, the submersible pump is connected to the water injection pipe, and the water injection pipe is connected to the first chamber.

[0014] As a further improvement of the technical solution of the utility model, a groove and a water-absorbing cotton sleeve are provided in the first chamber, the water-absorbing cotton sleeve is fixedly connected to the inner wall of the groove, and the water-absorbing cotton sleeve is provided on the grouting sample.

[0015] As a further improvement of the technical solution of the utility model, the piston assembly includes a piston rod and a piston head, the piston rod is fixedly connected to the piston head, the piston rod is fixedly connected to the pressing rod, and the piston head is slidably connected to the inner wall of the first chamber.

[0016] As a further improvement of the technical solution of the utility model, the load-bearing beam is provided with a through hole for the piston rod to pass through.

[0017] As a further improvement of the technical solution of the utility model, the cross section of the cylinder is H-shaped.

[0018] As a further improvement of the technical solution of the utility model, a timing solenoid valve is provided on the water injection pipe.

[0019] Compared with the prior art, the beneficial effects of the utility model are:

[0020] In the chlorine resistance test device of the grouting sample of the utility model, the chlorine injection mechanism is located in the second chamber and connected with the first chamber. The chlorine injection mechanism is used to inject chloride salt solution into the first chamber to corrode the grouting sample, and the grouting sample is subjected to corrosion test to obtain the long-term chlorine corrosion resistance of the grouting sample, which serves as a reference for the grouting treatment of poor geological engineering under the action of high chloride ion corrosion during engineering construction, and can obtain the durability of the grouting reinforcement body; the pressure mechanism is slidably connected to the first chamber, and the pressure mechanism is abutted against the grouting sample. The pressure mechanism is used to perform pressure test on the grouting sample, and the compressive strength of the grouting sample can be obtained. The chlorine resistance test device of the grouting sample has the characteristics of testing the strength and long-term corrosion resistance of the grouting sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The technology of the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments:

[0022] Figure 1 It is a schematic diagram of the overall structure of the chlorine resistance test device for grouting samples of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a pressurizing mechanism in a chlorine resistance testing device for grouting samples of the utility model;

[0024] Figure 3 It is a structural schematic diagram of a chlorine injection mechanism in a chlorine resistance test device for a grouting sample of the utility model;

[0025] Figure 4 It is a top view of the chlorine resistance test device of the utility model grouting sample;

[0026] Figure 5 The utility model is a three-dimensional structural schematic diagram of a water-absorbing cotton sleeve in a chlorine resistance test device for a grouting sample.

[0027] In the figure:

[0028] 1. Test cylinder; 11. First chamber; 12. Second chamber; 13. Groove; 14. Water-absorbing cotton sleeve;

[0029] 2. Chlorine injection mechanism; 21. Chlorinated salt water tank; 22. Submersible pump; 23. Water injection pipe;

[0030] 3. Pressurizing mechanism; 31. Load-bearing beam; 32. Hydraulic rod; 33. Pressing rod; 34. Piston rod; 35. Piston head;

[0031] 4. Support mechanism; 41. Base; 42. Column; 43. Middle support beam; 44. Upper support beam; 45. Connecting rod;

[0032] 5. Grouting specimen. DETAILED DESCRIPTION

[0033] The following will be combined with the embodiments and drawings to clearly and completely describe the concept, specific structure and technical effects of the utility model, so as to fully understand the purpose, scheme and effect of the utility model. It should be noted that the embodiments and features in the embodiments in this application can be combined with each other without conflict. The same reference numerals used throughout the drawings indicate the same or similar parts.

[0034] It should be noted that, unless otherwise specified, when a feature is referred to as being "fixed" or "connected" to another feature, it may be directly fixed or connected to the other feature, or it may be indirectly fixed or connected to the other feature. In addition, the descriptions of up, down, left, right, etc. used in the present invention are only relative to the relative positional relationship of the components of the present invention in the drawings.

[0035] Reference Figures 1 to 5, a chlorine resistance test device for a grouting sample, comprising a test tube 1, a chlorine injection mechanism 2 and a pressurizing mechanism 3;

[0036] In one embodiment, the test cylinder 1 includes a cylinder body, which includes a first chamber 11 and a second chamber 12, and the grouting sample 5 is placed in the first chamber 11; the chlorine injection mechanism 2 is located in the second chamber 12 and communicates with the first chamber 11; the pressurizing mechanism 3 is slidably connected to the first chamber 11, and the pressurizing mechanism 3 is abutted against the grouting sample 5.

[0037] Among them, the chlorine injection mechanism 2 is located in the second chamber 12 and connected to the first chamber 11. The chlorine injection mechanism 2 injects a chloride solution into the first chamber 11 to corrode the grouting sample 5, and performs a corrosion test on the grouting sample 5 to obtain the long-term chlorine corrosion resistance of the grouting sample 5, which serves as a reference for the grouting treatment of unfavorable geological engineering under the action of high chloride ion corrosion during engineering construction, and can obtain the durability of the grouting reinforcement body; the pressurizing mechanism 3 is slidably connected to the first chamber 11, and the pressurizing mechanism 3 is abutted against the grouting sample 5. The grouting sample 5 is pressure tested by the pressurizing mechanism 3 to obtain the compressive strength of the grouting sample 5. The chlorine resistance test device of the grouting sample 5 has the characteristics of detecting the strength and long-term corrosion resistance of the grouting sample 5.

[0038] In one embodiment, referring to Figure 4 As shown, the chlorine resistance test device also includes a support mechanism 4, which includes a base 41 and a support frame, the base 41 is fixedly connected to the support frame, the cylinder is located on the base 41, and the pressurizing mechanism 3 is mounted on the support frame. The support frame includes a column 42, an intermediate support beam 43, an upper support beam 44 and a connecting rod 45, the intermediate support beam 43 and the upper support beam 44 are both fixedly connected to the column 42, one end of the connecting rod 45 is fixedly connected to the intermediate support beam 43, and the other end is fixedly connected to the cylinder. Preferably, the base 41 is a rectangular steel plate fixed to the ground.

[0039] In one embodiment, referring to Figure 2 As shown, the pressurizing mechanism 3 includes a force beam 31, two hydraulic rods 32, a pressing rod 33 and a piston assembly. The force beam 31 is fixedly connected to the upper support beam 44, the hydraulic rod 32 is located above the force beam 31, the pressing rod 33 is fixedly connected to the hydraulic rod 32, and the pressing rod 33 is fixedly connected to the piston assembly. The piston assembly includes a piston rod 34 and a piston head 35, the piston rod 34 is fixedly connected to the piston head, the piston rod 34 is fixedly connected to the pressing rod 33, and the piston head 35 is slidably connected to the inner wall of the first chamber 11. The force beam 31 is provided with a through hole for the piston rod 34 to pass through. Preferably, the hydraulic rod 32 is provided with a pressure sensor.

[0040] In one embodiment, referring to Figure 3As shown, the chlorine injection mechanism 2 includes a chlorinated salt water tank 21, a submersible pump 22 and a water injection pipe 23. The submersible pump 22 is located in the chlorinated salt water tank 21. The submersible pump 22 is connected to the water injection pipe 23, and the water injection pipe 23 is connected to the first chamber 11. A timing solenoid valve is provided on the water injection pipe 23. The timing solenoid valve can be set to pass water once at a certain time to keep the grouting sample 5 fully moist during the test.

[0041] In one embodiment, referring to Figure 5 As shown, a groove 13 and a water-absorbing cotton sleeve 14 are provided in the first chamber 11. The water-absorbing cotton sleeve 14 is fixedly connected to the inner wall of the groove 13. The water-absorbing cotton sleeve 14 is sleeved on the grouting sample 5. The groove 13 is used to fix the grouting sample 5. The diameter of the water-absorbing cotton sleeve 14 is consistent with the diameter of the grouting sample 5.

[0042] In one embodiment, the chloride salt solution injection device can realize working condition simulation, simulate the working condition when the sample is fully immersed and the internal humid working condition. The working condition when the sample is fully immersed can be simulated by filling the entire first chamber 11 for infiltration, and the internal humid working condition can be simulated by only injecting a small amount of chloride salt solution and infiltrating by absorbing water through the absorbent cotton sleeve 14.

[0043] In one embodiment, the second chamber 12 is surrounded by four support legs, which are fixed on the base 41, and the cross section of the cylinder is H-shaped.

[0044] When testing the chlorine resistance test device, a traditional cement grouting sample was prepared as a comparative example 1, and a chlorine-resistant grouting sample was prepared as an example 1. The sample included 20% fly ash and 0.03% graphene oxide (see Table 1).

[0045] Table 1

[0046]

[0047] In Table 1, the graphene oxide concentration is 10 mg / ml, the cement is ordinary Portland cement with PO 42.5, and the fly ash is industrial secondary fly ash with a fineness of 14-25.

[0048] In the specific test process, a number of identical grouting samples of the components of comparative example 1 and embodiment 1 are first prepared, and a compression test is performed without injecting the chloride salt solution to obtain an initial compressive strength.

[0049] Replace the components of the grouting sample comparison example 1 and embodiment 1, and then control the water intake through the solenoid valve. Since the absorbent cotton sleeve has good water absorption performance, after the absorbent cotton sleeve fully absorbs water, the chloride ions therein will corrode the grouting sample included therein. After 180 days of erosion, a compression test is carried out, that is, the piston rod is pushed to press down the corroded grouting sample until it breaks, and the compressive strength value is included therein.

[0050] After 180 days of final erosion, the erosion resistance coefficients corresponding to the flexural strength and compressive strength of the grouting sample of comparative example 1 were only 0.83 and 0.78, while the erosion resistance coefficients corresponding to the flexural strength and compressive strength of the grouting sample of embodiment 1 were 1.04 and 1.07, respectively. The erosion resistance of the grouting material of the present invention is significantly higher than that of traditional cement materials.

[0051] Through this chlorine resistance test device, the corrosion resistance of different grouting samples can be well demonstrated.

[0052] For other contents of the chlorine resistance test device for the grouting sample described in the present invention, please refer to the prior art and will not be repeated here.

[0053] The above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Therefore, any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

[0054] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0055] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A chlorine resistance test device for grouting samples, characterized in that: include: Test cylinder, chlorine injection mechanism and pressurizing mechanism; The test cylinder comprises a cylinder body, the cylinder body comprises a first chamber and a second chamber, and the grouting sample is placed in the first chamber; The chlorine injection mechanism is located in the second chamber and communicates with the first chamber; The pressurizing mechanism is slidably connected to the first chamber, and the pressurizing mechanism is abutted against the grouting sample.

2. A chlorine resistance test device for grouting samples according to claim 1, characterized in that: It also includes a supporting mechanism, which includes a base and a supporting frame. The base is fixedly connected to the supporting frame, the cylinder is located on the base, and the pressurizing mechanism is mounted on the supporting frame.

3. The chlorine resistance test device for grouting samples according to claim 2 is characterized in that: The support frame includes a column, an intermediate support beam, an upper support beam and a connecting rod. The intermediate support beam and the upper support beam are both fixedly connected to the column. One end of the connecting rod is fixedly connected to the intermediate support beam, and the other end is fixedly connected to the cylinder.

4. The chlorine resistance test device for grouting samples according to claim 3 is characterized in that: The pressurizing mechanism includes a force-bearing beam, a hydraulic rod, a pressing rod and a piston assembly. The force-bearing beam is fixedly connected to the upper support beam, the hydraulic rod is located above the force-bearing beam, the pressing rod is fixedly connected to the hydraulic rod, and the pressing rod is fixedly connected to the piston assembly.

5. The chlorine resistance test device for grouting samples according to claim 2, characterized in that: The chlorine injection mechanism comprises a chlorinated salt water tank, a submersible pump and a water injection pipe. The submersible pump is located in the chlorinated salt water tank. The submersible pump is connected to the water injection pipe, and the water injection pipe is communicated with the first chamber.

6. The chlorine resistance test device for grouting samples according to claim 1, characterized in that: The first chamber is provided with a groove and a water-absorbing cotton sleeve, the water-absorbing cotton sleeve is fixedly connected to the inner wall of the groove, and the water-absorbing cotton sleeve is sleeved on the grouting sample.

7. The chlorine resistance test device for grouting samples according to claim 4, characterized in that: The piston assembly includes a piston rod and a piston head, the piston rod is fixedly connected to the piston head, the piston rod is fixedly connected to the pressing rod, and the piston head is slidably connected to the inner wall of the first chamber.

8. The chlorine resistance test device for grouting samples according to claim 7, characterized in that: The load-bearing beam is provided with a through hole for the piston rod to pass through.

9. The chlorine resistance test device for grouting samples according to claim 1, characterized in that: The cross section of the cylinder is H-shaped.

10. The chlorine resistance test device for grouting samples according to claim 5, characterized in that: A timing electromagnetic valve is arranged on the water injection pipe.

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