Testing device and method for cement mortar repairing effect under flowing water condition

Abstract

The invention discloses a testing device and method for the repairing effect of cement mortar under the flowing water condition, and belongs to a detection device in the technical field of cement mortar testing equipment. According to the technical scheme, a flowing water control assembly is arranged and provided with a water supply barrel and a pipeline communicated with the water supply barrel; a pipeline pump and a flow controller are arranged on the pipeline; the underwater washout test assembly is provided with a water tank, a grouting barrel and a mechanical arm, the mechanical arm is arranged on the water tank and used for controlling the hanging position of the grouting barrel in the water tank, and the pipeline is arranged on one side of the water tank and provides controllable water flow through the flow controller; through cooperation of the flowing water control assembly and the underwater scouring test assembly, actual field repairing conditions of cement mortar are truly simulated, and the authenticity and reliability of the test are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cement mortar testing equipment, and in particular relates to a testing device and method for testing the repair effect of cement mortar under dynamic water conditions. Background Art

[0002] In underwater engineering construction, structures such as dams, bridge piers, and underwater pipelines often require cement mortar for repair to ensure their stability and durability under water scouring conditions. However, in the existing technology, there is a lack of evaluation devices for the repair effect of cement mortar under dynamic water conditions, and there is usually a lack of testing methods for the performance of repair materials under different flow rates, which makes it difficult to accurately evaluate the quality of repairs. The evaluation of the repair effect of underwater cement mortar is mainly reflected by measuring the mass loss rate of the mortar after it has been immersed in water for a certain period of time. At present, the "Test Procedure for Underwater Non-Dispersible Concrete" DL / T5117-2000 and the "Technical Requirements for Underwater Non-Dispersible Concrete Flocculants" GB / T 37990-2019 test the mass loss rate of cement mortar mainly in a static water environment, and do not take into account the impact of dynamic water flow on the repair effect of cement mortar in actual repairs. This defect makes it impossible to accurately evaluate the repair effect of cement mortar in actual applications under dynamic water conditions.

[0003] The existing conventional weighing method for calculating cement mortar mass loss rate is cumbersome and time-consuming. Because the water in the mortar container cannot be completely drained, the test results are subject to significant errors, which greatly hinders the evaluation of the effectiveness of underwater cement mortar repairs. Therefore, a new test device is urgently needed that can simplify the testing process under dynamic water conditions and improve the accuracy and reliability of the evaluation. Summary of the Invention

[0004] The first object of the present invention is to provide a test device for the repair effect of cement mortar under dynamic water conditions. By cooperating with the provided dynamic water control component and the underwater scouring test component, the device can truly simulate the actual on-site repair conditions of cement mortar, thereby improving the authenticity and reliability of the test.

[0005] The second purpose of the present invention is to provide a test method for the repair effect of cement mortar under dynamic water conditions, and an intelligent industrial computer control system. Through operation and control on the touch screen, it can automatically adjust the water flow rate, manipulate the robotic arm, and start the test equipment, thereby realizing the automation and intelligence of the experimental process. This systematic control technology not only improves the experimental efficiency, but also ensures the repeatability and data consistency of each experiment; clear evaluation standards for the repair effect. This patent sets a repair effect grading standard based on the mass loss rate, which can distinguish the repair effect as "excellent", "good" or "poor". This standardized evaluation system is an important basis for scientific evaluation and comparison of repair effects, and helps promote the application of technology in actual engineering.

[0006] The object of the present invention is achieved by a test device for testing the repair effect of cement mortar under dynamic water conditions, comprising:

[0007] A dynamic water control assembly, the dynamic water control assembly being provided with a water supply barrel, a pipeline connected to the water supply barrel, and the pipeline being provided with a pipeline pump and a flow controller;

[0008] An underwater flushing test assembly is provided with a water tank, a grouting bucket and a mechanical arm, wherein the mechanical arm is placed on the water tank and is used to control the hanging position of the grouting bucket in the water tank, and

[0009] The pipeline is arranged on one side of the water tank and provides a controllable water flow through the flow controller.

[0010] Furthermore, the pipeline and the water tank are connected via an "E"-shaped PVC diverter.

[0011] Furthermore, the water tank is a rectangular parallelepiped structure with an open top, and the water tank is provided with a water outlet pipe, which is provided at the end opposite to the "E"-shaped PVC diverter.

[0012] Furthermore, the robotic arm includes a column, a rotating platform arranged on the top of the column and a cross arm arranged at the other end of the rotating platform, and the grouting bucket is suspended at the other end of the cross arm.

[0013] Furthermore, a steel strand is provided at the end of the cross arm, a hook is provided at the end of the steel strand, and the grouting bucket is connected to the hook via a handle.

[0014] Furthermore, the grouting barrel is a barrel body with a woven structure, and the woven structure is a 50-mesh structure.

[0015] Furthermore, when the grouting bucket is in the water tank, the highest point of the grouting bucket is located above the "E"-shaped PVC diverter.

[0016] Furthermore, the experimental objects placed in the grouting bucket are several concrete blocks.

[0017] A method for testing the repair effect of cement mortar under dynamic water conditions, using a testing device for the repair effect of cement mortar under dynamic water conditions, comprises the following steps:

[0018] S1: Close the water outlet pipe and fill the water tank with water. Stop filling when the water level reaches 200 mm from the top of the tank. Use the robotic arm to move the hook to the center of the tank. Turn on the power switch and touch the display to enter the startup interface. Select different water flow rates according to research needs and start the pipeline pump and flow controller to generate constant water flow.

[0019] S2: Record the mass of the grouting bucket filled with concrete blocks, recorded as m1; inject slurry into the grouting bucket to 100mm from the top of the bucket, and record the mass of the grouting container bucket as m2; connect the grouting bucket filled with slurry through a hook and start the underwater flushing test; after flushing for 10 minutes, lift the grouting container bucket out and wait for it to drain naturally, and record the mass as m3;

[0020] S3: Calculate the mass loss rate based on the data in S2. The formula is as follows:

[0021]

[0022] Where: m p is the mass loss rate of cement mortar;

[0023] m1 is the mass of the grouting container barrel containing the concrete block 307;

[0024] m2 is the mass of the grouting container barrel filled with cement mortar;

[0025] m3 is the mass of the grouting container barrel filled with cement mortar after the scouring test;

[0026] S4: For the calculated m p Evaluation: if the mass loss rate is less than 5%, the repair effect is excellent; if the mass loss rate is between 5% and 15%, the repair effect is good; if the mass loss rate is greater than 15%, the repair effect is poor.

[0027] The beneficial effects of the present invention are embodied in:

[0028] In this invention, the dynamic water control assembly and underwater flushing test assembly work together to achieve stable control of the water flow velocity in the water tank, creating an adjustable dynamic water environment. This provides reliable equipment support for studying the effects of different flow rates on cement mortar repair effects, realistically simulating actual on-site cement mortar repair conditions, and improving the authenticity and reliability of the test. Constant and adjustable dynamic water control technology. This dynamic water flow regulation system can meet the various water flow conditions required in actual projects. A quantitative mass loss rate calculation method is proposed. This method measures the mass change of the grouting container barrel before and after the experiment and evaluates the repair effect based on the mass loss rate. This method can provide a scientific quantitative indicator that directly reflects the performance of cement mortar under dynamic water conditions, solving the problem of insufficient accuracy of traditional qualitative analysis. It also provides a clear standard for evaluating repair effects. This application establishes a repair effect grading standard based on the mass loss rate, which can distinguish repair effects as "excellent," "good," or "poor." This standardized evaluation system is an important basis for scientifically evaluating and comparing repair effects, helping to promote the application of this technology in actual projects. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0030] Figure 1 Schematic diagram of the overall structure of the device of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the underwater scouring test assembly of the present invention;

[0032] Figure 3 Schematic diagram of the structure of the robotic arm of the present invention.

[0033] In the accompanying drawings, 1-water supply bucket, 2-pipeline pump, 3-flow controller, 4-pipeline, 5-"E" type PVC diverter, 6-water tank, 7-mechanical arm, 8-grouting bucket, 9-touch screen, 10-power switch, 11-power indicator light, 12-water outlet pipe, 301-column, 302-rotating table, 303-cross arm, 304-steel strand, 305-hook, 306-handle, 307-concrete block. DETAILED DESCRIPTION

[0034] The following embodiments of the technical solution of the present invention will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0035] It should be noted that, unless otherwise specified, the technical or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0036] Reference Figure 1-Figure 3 , a test device for testing the repair effect of cement mortar under dynamic water conditions, comprising:

[0037] A dynamic water control assembly, comprising a water supply barrel 1, a pipe 4 connected to the water supply barrel 1, and a pipe pump 2 and a flow controller 3 provided on the pipe 4;

[0038] An underwater flushing test assembly is provided with a water tank 6, a grouting bucket 8 and a mechanical arm 7. The mechanical arm 7 is placed on the water tank 6 and is used to control the hanging position of the grouting bucket 8 in the water tank 6.

[0039] The pipeline 4 is provided on one side of the water tank 6 and provides a controllable water flow through the flow controller 3 .

[0040] By cooperating with the provided dynamic water control component and the underwater flushing test component, the water flow velocity in the water tank 6 is stably controlled, creating an adjustable dynamic water environment. This provides reliable equipment support for studying the effects of different flow rates on cement mortar repairs, realistically simulates the actual on-site repair conditions of cement mortar, and improves the authenticity and reliability of the test. Specifically, by providing a water supply barrel 1 connected to the water tank 6 via the pipeline 4, and under the control of the pipeline pump 2 and the flow controller 3 provided on the pipeline 4, controllable water flow in the water tank 6 is achieved, thereby providing a dynamic water flow to test the cement slurry in the grouting bucket 8. Optionally, the pipeline 4 is a PVC pipe with a diameter of 50 mm, the pipeline pump 2 is an IRG vertical pipeline centrifugal pump with a power of 0.75 KW, and the flow controller 3 is a Zhongan DN10 flow controller.

[0041] Preferably, the pipeline 4 and the water tank 6 are connected via an “E”-shaped PVC diverter 5 .

[0042] Constant and adjustable dynamic water control technology. Through pipeline pumps, flow controllers and PVC pipes, the technology of accurately controlling water flow velocity and flow rate can be realized, which can simulate different dynamic water conditions from low speed to high speed in the experimental device. This dynamic water flow regulation system can meet the various water flow conditions in actual engineering and is one of the core technical points of this patent. As a preferred method of this embodiment, other types of water pump systems (such as variable frequency pumps) can be used to achieve the regulation of different water flow speeds. Valves and bypass pipes can also be used for fine control of water flow, or propeller simulators can be used to generate dynamic water conditions.

[0043] pass Figure 1 As shown in the figure, in order to make the pipe 4 provide a better uniform water flow in the water tank 6 to meet the test effect, the connection between the pipe 4 and the water tank 6 is connected by setting an "E"-shaped PVC diverter 5 to increase the uniformity of the water flow discharged from the pipe 4 in the water tank 6. As a preferred embodiment, the "E"-shaped PVC diverter 5 is 300 mm away from the bottom of the water tank 6.

[0044] Preferably, the water tank 6 is a rectangular parallelepiped structure with an open top, and the water tank 6 is provided with a water outlet pipe, which is provided at the end opposite to the “E”-shaped PVC diverter 5 .

[0045] It can be understood that in order to realize the operation of the dynamic water flow after the robotic arm 7 carries the grouting bucket 8 to be immersed in the water tank 6, the water tank 6 is a rectangular parallelepiped structure with an open top.

[0046] Preferably, the robotic arm 7 includes a column 301 , a rotating platform 302 arranged on the top of the column 301 and a cross arm 303 arranged at the other end of the rotating platform 302 , and the grouting bucket 8 is suspended at the other end of the cross arm 303 .

[0047] As a preferred method, an intelligent robotic arm equipped with multi-point sensors can be used, which can not only accurately locate the grouting container, but also monitor the changes in water flow rate and pressure in real time, and dynamically adjust the experimental conditions through sensor feedback.

[0048] Preferably, a steel strand 304 is provided at the end of the cross arm 303 , a hook 305 is provided at the end of the steel strand 304 , and the grouting bucket 8 is connected to the hook 305 via a handle 306 .

[0049] A column 301 is provided on one side of the water tank 6. A rotating platform 302 is provided on the top of the column 301. A cross arm 303 is connected to the output end of the rotating platform 302. The rotating platform 302 has a self-rotating function. In other words, the center of the rotating platform 302 is connected to a rotating motor, which is vertically mounted on the top of the column 301. A steel strand 304 is slidably mounted on the cross arm 303. A hook 305 is connected to the end of the steel strand 304. The hook 305 fixes the grouting container bucket 8 in the water tank 6.

[0050] The combination of a robotic arm and a grouting container automatically and precisely locates the grouting container's flushing position and conducts underwater flushing tests. The robotic arm's automated operation ensures consistent and repeatable positioning for each test, a crucial technology for reducing errors and improving data accuracy during experiments.

[0051] Preferably, the grouting barrel 8 is a barrel body with a woven structure, and the woven structure is a 50-mesh structure.

[0052] To simulate the actual underwater grouting effect of cement mortar, a robotic arm 7 is installed adjacent to the water tank 6, with the output end of the robotic arm 7 operatively positioned vertically inward. In a further embodiment, a steel strand 304 is fixed to the end of the cross arm 303 of the robotic arm 7. A hook 305 is suspended from the end of the steel strand 304 and connected to the grouting bucket 8 containing the concrete block 307. In other words, when a flushing test is required, the grouting bucket 8 containing the concrete block 307 is pre-lifted and filled with slurry. The handle 306 of the grouting bucket 8 is then hung on the hook 305. The rotary table 302 is rotated by an industrial computer, and the grouting container bucket is slowly lowered into the water tank 6. The grouting container bucket is braided from 50-mesh brass and is a cylinder with a diameter of 200 mm and a height of 400 mm.

[0053] Preferably, when the grouting bucket 8 is in the water tank 6 , the highest point of the grouting bucket 8 is located above the “E”-shaped PVC diverter 5 .

[0054] Preferably, the experimental objects placed in the grouting bucket 8 are several concrete blocks 307 .

[0055] Preferably, the outer wall of the water tank 6 is provided with an electrically connected touch screen display 9, a power switch 10 and a power indicator light 11 for adjusting parameters.

[0056] The side of the water tank 6 is equipped with a touch screen display 9, a power switch 10, and a power indicator light 11. The output terminals of the pipeline pump 2 and the flow controller 3 are electrically connected to the control motherboard, which is controlled by an industrial computer to start and stop the pipeline pump 2 and the flow rate of the flow controller 3. The control motherboard is Advantech's AIMB-705 control motherboard.

[0057] The intelligent industrial computer control system, operated and controlled via a touchscreen display, automatically adjusts water flow rate, manipulates the robotic arm, and activates test equipment, automating and intelligentizing the experimental process. This systematic control technology not only improves experimental efficiency but also ensures repeatability and data consistency across experiments.

[0058] The working principle and working process of the present invention:

[0059] Step 1: Close the water outlet pipe 12 and fill water into the water tank 6. Stop filling water when the water is 200 mm from the top of the water tank; move the hook 305 to the center of the water tank 6 by the robotic arm; turn on the power switch 10, touch the display screen 9 to enter the start interface, select different water flow rates according to research needs, and start the pipeline pump 2 and flow controller 3 to generate constant dynamic water;

[0060] Step 2: Record the mass of the grouting container barrel 8 containing the concrete block 307 as m1; inject slurry into the grouting container barrel 8 to 100 mm from the top of the barrel, and record the mass of the grouting container barrel as m2; connect the grouting container barrel 8 filled with slurry through the hook 305 to start the underwater flushing test; after flushing for 10 minutes, lift the grouting container barrel out and wait for it to drain naturally. Record the mass as m3. The mass loss rate is calculated as follows:

[0061]

[0062] Where: m p is the mass loss rate of cement mortar;

[0063] m1 is the mass of the grouting container barrel 8 containing the concrete block 307;

[0064] m2 is the mass of the cement mortar grouting container bucket 8;

[0065] m3 is the mass of the cement mortar grouting container bucket 8 after the scouring test;

[0066] A quantitative mass loss rate calculation method was developed. This method measures the mass change of the grouting container before and after the experiment and uses the mass loss rate to evaluate the repair effect. This method provides a scientific, quantitative indicator that directly reflects the performance of cement mortar under dynamic water conditions, resolving the inaccuracy of traditional qualitative analysis.

[0067] Step 3: Evaluate the repair effect of cement mortar under dynamic water conditions based on the mass loss rate of cement mortar; if the mass loss rate is less than 5%, the repair effect is excellent; if the mass loss rate is between 5% and 15%, the repair effect is good; if the mass loss rate is greater than 15%, the repair effect is poor.

[0068] In summary, the present invention solves the problem that there is no test device in the existing equipment to evaluate the repair effect of cement mortar under dynamic water conditions; it improves the grouting container barrel to ensure that the water inside the container barrel can be completely discharged after flushing, reduces test errors, and improves the evaluation accuracy of the repair effect; by placing concrete blocks, it simulates the actual repair situation; and provides quantifiable evaluation indicators for the evaluation of the repair effect of cement mortar under dynamic water conditions.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and description of the present invention.

Claims

1. A test device for testing the repair effect of cement mortar under dynamic water conditions, characterized in that: include: A dynamic water control component, the dynamic water control component is provided with a water supply barrel (1), a pipeline (4) connected to the water supply barrel (1), and a pipeline pump (2) and a flow controller (3) are provided on the pipeline (4); An underwater flushing test assembly is provided, the underwater flushing test assembly being provided with a water tank (6), a grouting bucket (8) and a mechanical arm (7), the mechanical arm (7) being placed on the water tank (6) and being used for controlling the hanging position of the grouting bucket (8) in the water tank (6), and The pipeline (4) is provided on one side of the water tank (6) and provides a controllable water flow through the flow controller (3).

2. The test device for cement mortar repair effect under dynamic water conditions according to claim 1 is characterized in that: The pipeline (4) and the water tank (6) are connected via an "E"-shaped PVC diverter (5).

3. The test device for cement mortar repair effect under dynamic water conditions according to claim 2, characterized in that: The water tank (6) is a rectangular parallelepiped structure with an open top. The water tank (6) is provided with a water outlet pipe (12). The water outlet pipe (12) is provided at an end opposite to the "E"-shaped PVC diverter (5).

4. The test device for cement mortar repair effect under dynamic water conditions according to claim 3, characterized in that: The mechanical arm (7) includes a column (301), a rotating platform (302) arranged on the top of the column (301), and a cross arm (303) arranged at the other end of the rotating platform (302), and the grouting bucket (8) is suspended at the other end of the cross arm (303).

5. The testing device for cement mortar repair effect under dynamic water conditions according to claim 4 is characterized in that: The end of the cross arm (303) is provided with a steel strand (304), the end of the steel strand (304) is provided with a hook (305), and the grouting bucket (8) is connected to the hook (305) via a handle (306).

6. The testing device for cement mortar repair effect under dynamic water conditions according to claim 5, characterized in that: The grouting barrel (8) is a barrel body with a woven structure, and the woven structure is a 50-mesh structure.

7. The testing device for cement mortar repair effect under dynamic water conditions according to claim 2, characterized in that: When the grouting bucket (8) is in the water tank (6), the highest point of the grouting bucket (8) is located above the "E"-shaped PVC diverter (5).

8. The test device for cement mortar repair effect under dynamic water conditions according to any one of claims 1 to 7, characterized in that: The experimental objects placed in the grouting bucket (8) are a number of concrete blocks (307).

9. The testing device for cement mortar repair effect under dynamic water conditions according to claim 2, characterized in that: The outer wall of the water tank (6) is provided with an electrically connected touch screen (9), a power switch (10) and a power indicator light (11) for adjusting parameters.

10. A test method for cement mortar repair effect under dynamic water conditions, characterized in that: A test device for cement mortar repair effect under dynamic water conditions is used, including the following steps: S1: Close the water outlet pipe (12), fill water into the water tank (6), and stop filling water when the water is 200 mm from the top of the water tank (6); move the hook (305) to the center of the water tank (6) through the mechanical arm; turn on the power switch (10), touch the display screen (9) to enter the start interface, select different water flow rates according to research needs, and start the pipeline pump (2) and the flow controller (3) to generate constant dynamic water; S2: Record the mass of the grouting bucket (8) filled with concrete blocks (307), record it as m1; inject slurry into the grouting bucket (8) to 100 mm from the top of the bucket, record the mass of the grouting container bucket as m2; connect the grouting bucket (8) filled with slurry through the hook (305) to start the underwater flushing test; after flushing for 10 minutes, lift the grouting container bucket out, wait for it to drain naturally, and record the mass as m3; S3: Calculate the mass loss rate based on the data in S2. The formula is as follows: Where: m p is the mass loss rate of cement mortar; m1 is the mass of the grouting container barrel containing the concrete block (307); m2 is the mass of the grouting container barrel filled with cement mortar; m3 is the mass of the grouting container barrel filled with cement mortar after the scouring test; S4: For the calculated m p Evaluation: if the mass loss rate is less than 5%, the repair effect is excellent; if the mass loss rate is between 5% and 15%, the repair effect is good; if the mass loss rate is greater than 15%, the repair effect is poor.

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