Durability tester for concrete in saline-alkali soil water coupling environment

Abstract

The utility model discloses a durability tester for concrete in a saline-alkali soil water coupling environment, and belongs to the technical field of concrete durability testing. The concrete sample durability testing device comprises the base, a plurality of evenly-arranged connecting grooves are formed in the top of the base, a concrete sample can be placed in the placing barrel through the base and the placing barrel, and durability testing is conducted on the concrete sample through cooperation of the supporting frame, the electric lifting rod, the connecting block and the sealing cover. The pressure push rod pushes the pressing block with the pressure sensor, so that the actual stress conditions of the concrete in the saline-alkali soil water coupling environment under different pressure conditions can be simulated, the durability of the concrete can be reflected more truly, and then through the cooperation of the water storage tank, the flow divider, the water pumping pipe, the stirring box, the liquid pumping pump, the telescopic pipe and the pH adjusting box, the durability of the concrete can be improved. A saline-alkali solution can be blended in the stirring box, and environments with different saline-alkali degrees are simulated, so that a simulated saline-alkali soil and water coupling environment is provided for a concrete sample.

Description

Technical Field

[0001] This utility model belongs to the field of concrete durability testing technology, specifically a durability tester for concrete in a saline-alkali soil-water coupled environment. Background Technology

[0002] Concrete durability refers to the ability of concrete to resist the effects of environmental media and maintain its good performance and appearance integrity over a long period. Concrete durability includes aspects such as impermeability, heat resistance, and compressive strength; the better the performance, the more stable the concrete structure. However, in saline-alkali soil areas, concrete structures are constantly exposed to a complex saline-alkali soil-water coupled environment, and are affected by various factors such as salt corrosion and temperature changes, posing a severe challenge to their durability. To assess the durability of concrete in this saline-alkali soil-water coupled environment, simulated tests on concrete specimens are necessary.

[0003] A search revealed a Chinese patent application (No. 202121680452.0) disclosing a testing device for concrete durability. This patent includes a base box with a frame mounted on its top surface. A groove is installed on the inner top wall of the frame. Three sets of equidistant experimental columns are mounted on the top surface of the base box, located below the groove. A mold is installed inside each experimental column, and a sealing cap is threaded to the top of each column. A heating tube is wound around the surface of the mold, and a concrete temperature and humidity transmitter is installed at the bottom of the mold. This patent utilizes the heating tube and the concrete temperature and humidity transmitter to detect the temperature and humidity of the concrete. When the heating tube is activated and the transmitter detects that the concrete temperature has reached a certain level, it sends a signal to the heating tube. Upon receiving the signal, the heating tube stops heating, and the surface of the concrete is then observed for cracks, thus assessing the concrete's heat resistance.

[0004] Although the aforementioned patent can detect the temperature and humidity of concrete, as well as its heat resistance, in practical use, it can test multiple concrete specimens simultaneously, but it cannot adjust the pH and salinity of the test environment for each specimen individually. This requires repeated simulations of different environments, resulting in low testing efficiency and an inability to accurately simulate the actual environmental differences in different saline-alkali soil regions. Consequently, it is difficult to meet the diverse needs of concrete durability testing in actual engineering projects, as some concrete structures need to be in a complex saline-alkali soil-water coupled environment for a long time, which this patent cannot simulate.

[0005] Therefore, it is necessary to develop a durability tester for concrete in saline-alkali soil-water coupled environments. Utility Model Content

[0006] To address the problems mentioned in the background art, the purpose of this utility model is to provide a durability tester for concrete in a water-coupled environment in saline-alkali soil. This instrument has the advantages of being able to test multiple concrete specimens simultaneously and simulating different environments according to actual needs, thus meeting the diverse requirements of concrete durability testing in actual engineering projects. It solves the problems of low testing efficiency, inability to accurately simulate the actual environmental differences in different saline-alkali soil areas, and difficulty in meeting the diverse requirements of concrete durability testing in actual engineering projects.

[0007] This utility model provides the following technical solution: a durability tester for concrete in a saline-alkali soil water coupling environment, comprising a base, the top of which has several evenly arranged connecting slots, and a placement cylinder fixedly connected inside the connecting slots. A support frame is fixedly connected to the top of the base, and several electric lifting rods are fixedly connected to the top of the support frame, with each electric lifting rod corresponding one-to-one with a placement cylinder. The output end of each electric lifting rod passes through the support frame and is fixedly connected to a connecting block. A cap is fixedly connected to the bottom of the connecting block, and the cap engages with the placement cylinder. A pressure push rod is fixedly connected inside the connecting block. The output end of the rod passes through the cap and is fixedly connected to a pressure block with a pressure sensor. A water storage tank is fixedly connected to the top of the base. The top of the water storage tank is connected to a distributor via a water pump. The top of the distributor is connected to several evenly arranged water pumping pipes. The other end of each water pumping pipe is connected to a stirring box via a one-way valve. A liquid pump is connected to the bottom of the stirring box. The output end of the liquid pump is connected to a telescopic pipe. Several telescopic pipes correspond one-to-one with several caps and are connected to them. A pH adjustment box is symmetrically arranged on the top of the stirring box and is connected to the stirring box via a solenoid valve. The interior of the pH adjustment box is filled with a salt-alkali reagent.

[0008] The beneficial effects of this utility model are as follows:

[0009] 1. This utility model, through the arrangement of a base and several placement cylinders, allows multiple concrete samples to be placed in the cylinders. The placement cylinders can then be closed via a support frame, electric lifting rod, connecting block, and cap, enabling simultaneous durability testing of multiple concrete samples. This improves testing efficiency and the accuracy and reliability of the data. A pressure pusher pushes a pressure block equipped with a pressure sensor, simulating the actual stress conditions of concrete in a saline-alkali soil-water coupled environment under different pressure conditions, more realistically reflecting the durability of the concrete. Furthermore, through the coordination of a water storage tank, distributor, pumping pipe, mixing box, pump, telescopic pipe, and pH adjustment box, a saline-alkali solution can be prepared in the mixing box to simulate environments with different salinity levels. This provides a simulated saline-alkali soil-water coupled environment for the concrete samples, allowing for the study of the durability of different concrete formulations in a saline-alkali soil-water coupled environment, or the durability performance of concrete with the same formulation in different saline-alkali soil-water coupled environments, while simultaneously comparing and testing multiple samples.

[0010] 2. This utility model can heat the environment inside the placement cylinder by setting a heating wire, and reduce heat loss by using an insulation shell. By setting a temperature and humidity sensor, the temperature and humidity inside the placement cylinder can be monitored in real time, which can accurately simulate the durability of concrete in a saline-alkali soil-water coupled environment under different temperature and humidity conditions, which is more in line with actual application scenarios. By setting a pH sensor, the acidity and alkalinity of the prepared saline-alkali solution can be monitored in real time, which can be adjusted in time to ensure the accuracy of the test environment. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a rear-view perspective view of the structure of this utility model.

[0013] Figure 3 This is a partial cross-sectional perspective view of the structure of this utility model.

[0014] Figure 4 This utility model Figure 3 Enlarged diagram of point A in the middle.

[0015] Figure 5 This utility model Figure 3 Enlarged diagram of point B in the middle.

[0016] Figure 6 This utility model Figure 3 Enlarged diagram of point C in the middle. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0018] like Figures 1 to 6 As shown, the durability tester for concrete in a saline-alkali soil water coupling environment of this embodiment includes a base 1. The top of the base 1 has several evenly arranged connecting slots. Placement cylinders 2 are fixedly connected inside the connecting slots. A support frame 3 is fixedly connected to the top of the base 1. Several electric lifting rods 4 are fixedly connected to the top of the support frame 3, and each electric lifting rod 4 corresponds one-to-one with a number of placement cylinders 2. The output end of each electric lifting rod 4 passes through the support frame 3 and is fixedly connected to a connecting block 5. A cover 6 is fixedly connected to the bottom of the connecting block 5, and the cover 6 engages with the placement cylinder 2. A pressure push rod 7 is fixedly connected inside the connecting block 5. The output end of the pressure push rod 7 passes through the cover 6 and is fixedly connected to a pressure block 8 with a pressure sensor. The top of the base 1 is fixedly connected to... A water storage tank 9 is connected to the top of the water storage tank 9 via a water pump, which is connected to a distributor 10. The top of the distributor 10 is connected to several evenly arranged water pumping pipes 11. The other end of the water pumping pipes 11 is connected to a stirring box 12 via a one-way valve. The bottom of the stirring box 12 is connected to a liquid pump 13. The output end of the liquid pump 13 is connected to a telescopic pipe 14. Several telescopic pipes 14 are respectively connected to several sealing caps 6 in a one-to-one correspondence. A pH adjustment box 15 is symmetrically arranged on the top of the stirring box 12. The pH adjustment box 15 is connected to the stirring box 12 via a solenoid valve. The pH adjustment box 15 is filled with salt and alkali reagents. The salt and alkali reagents include various types such as sodium salts (sodium chloride, sodium sulfate, etc.), carbonates (such as sodium carbonate, sodium bicarbonate, etc.), and mixed salt and alkali reagents.

[0019] refer to Figure 3 and Figure 4 A spiral heating wire 16 is fixedly connected to the outside of the placement cylinder 2, an insulation shell 17 is fixedly connected to the surface of the placement cylinder 2, a temperature and humidity sensor 18 is fixedly connected to the inside of the placement cylinder 2, and a pH sensor 19 is installed inside the stirring box 12.

[0020] In this embodiment, the heating wire 16 can heat the environment inside the placement cylinder 2, and the insulation shell 17 reduces heat loss. The temperature and humidity sensor 18 monitors the temperature and humidity inside the placement cylinder 2 in real time, which can accurately simulate the durability of concrete in a saline-alkali soil-water coupled environment under different temperature and humidity conditions, making it more in line with actual application scenarios. The pH sensor 19 can monitor the acidity and alkalinity of the prepared saline-alkali solution in real time, which can be easily adjusted in time to ensure the accuracy of the test environment.

[0021] refer to Figure 1 and Figure 2The top of the support frame 3 is fixedly connected to several controllers 20 with displays, and the controllers 20 correspond one-to-one with several placement cylinders 2 and are used in conjunction with them. The controllers 20 are electrically connected to the electric lifting rod 4, pressure push rod 7, pressure sensor, diverter 10, liquid pump 13, solenoid valve, heating wire 16, temperature and humidity sensor 18 and pH sensor 19 respectively. The top of the base 1 is fixedly connected to a weighing device 21.

[0022] This embodiment achieves automated control of the testing process and real-time monitoring and adjustment of parameters through the setting of controller 20, thereby improving testing accuracy and efficiency and reducing human error. Through the setting of weigher 21, the concrete sample and related solutions in the placement cylinder 2 can be weighed, which facilitates the recording of the mass change of the sample during the testing process and provides more data support for analyzing the durability of concrete.

[0023] refer to Figure 3 and Figure 6 A stirring motor 22 is fixedly connected to the top of the stirring box 12, and the output end of the stirring motor 22 passes through the stirring box 12 and is fixedly connected to the stirring blade 23.

[0024] In this embodiment, the addition of salt and alkali reagents and water can be fully mixed by the setting of stirring motor 22 and stirring blade 23, ensuring that the concentration of salt and alkali solution delivered to the placement cylinder 2 is uniform and improving the accuracy of test results.

[0025] refer to Figure 3 and Figure 4 The base 1 has a drain chamber 24 inside, one end of which is connected to a drain pipe. The bottom of the placement cylinder 2 is connected to a drain hole, which is connected to the drain chamber 24. A drain valve 25 is fixedly connected inside the drain hole.

[0026] This embodiment uses a drainage system consisting of a drainage chamber 24, a drainage pipe, a drainage hole at the bottom of the placement cylinder 2, and a discharge valve 25 to facilitate the discharge of waste liquid in the placement cylinder 2 after the test, maintain the cleanliness of the test environment, and facilitate the processing and analysis of the solution after the test.

[0027] refer to Figure 3 and Figure 4 A push rod 26 is fixedly connected to the bottom of the inner wall of the placement cylinder 2, and a push block 27 is fixedly connected to the output end of the push rod 26.

[0028] In this embodiment, the concrete sample can be ejected from the placement cylinder 2 after the test by using the ejector push rod 26 and the ejector block 27, making it convenient to take out the sample for subsequent testing and analysis, and avoiding damage to the sample due to adhesion to the placement cylinder 2.

[0029] Check if there is water in the water storage tank 9 and if the pH adjustment box 15 contains saline-alkali reagents. Also check if components such as the electric lifting rod 4 and pressure push rod 7 are functioning properly. Next, place concrete samples with different formulations, or concrete samples with the same formulation but used in different testing environments, into each placement cylinder 2, allowing the testing instrument to simultaneously accommodate multiple samples for comparative testing. Then, turn on the water pump to deliver water from the water storage tank 9 to the mixing box 12 via the distributor 10 and the pumping pipe 11. According to the testing requirements, open the solenoid valve of the pH adjustment box 15 via the controller 20, allowing different amounts or types of saline-alkali reagents to flow into the mixing box 12. Start the stirring motor 22 to rotate the stirring blades 23, mixing the solutions. The pH sensor 19 inside the mixing box 12 monitors the acidity and alkalinity in real time and feeds feedback to the controller 20 for adjustment. Then, activate the heating wire 16 on the outside of the placement cylinder 2 via the controller 20. The temperature and humidity sensor 18 monitors the temperature and humidity in real time, and the controller 20 automatically adjusts... The heating wire 16 has a power rating, and the insulation shell 17 maintains a stable temperature and humidity. Different conditions can be set for the placement cylinder 2 for different samples. Then, the electric lifting rod 4 is activated by the controller 20, which pushes the connecting block 5 and the sealing cover 6 to descend and lock the sample in place cylinder 2. The liquid pump 13 is turned on, and the salt and alkali solution prepared in the mixing box 12 is transported into the placement cylinder 2 through the telescopic tube 14 to soak the sample. The pressure push rod 7 is activated, and the pressure block 8 applies pressure to the sample. The pressure sensor monitors and feeds back the pressure value in real time. During the test, the controller 20 receives and displays the data from the pressure sensor, temperature and humidity sensor 18, and pH sensor 19 in real time. After the test, the discharge valve 25 is opened by the controller 20 to allow the waste liquid to flow into the discharge chamber 24 for discharge. The ejection push rod 26 is activated, and the ejection block 27 ejects the sample for subsequent testing and analysis. Finally, the concrete sample in the placement cylinder 2 is weighed using the weighing device 21 to detect the weight change of the sample after immersion in water, thereby improving the accuracy of concrete impermeability testing.

Claims

1. A durability testing instrument for saline soil water coupling environment concrete, comprising a base (1), characterized in that: The top of the base (1) has several evenly arranged connecting slots. The inside of the connecting slots is fixedly connected to a placement cylinder (2). The top of the base (1) is fixedly connected to a support frame (3). The top of the support frame (3) is fixedly connected to several electric lifting rods (4). The electric lifting rods (4) correspond one-to-one with the placement cylinders (2). The output end of the electric lifting rod (4) passes through the support frame (3) and is fixedly connected to a connecting block (5). The bottom of the connecting block (5) is fixedly connected to a cover (6), and the cover (6) is snapped into the placement cylinder (2). The inside of the connecting block (5) is fixedly connected to a pressure push rod (7). The output end of the pressure push rod (7) passes through the cover (6) and is fixedly connected to a pressure block (8) with a pressure sensor. A water storage tank (9) is fixedly connected to the top of the base (1). A diverter (10) is connected to the top of the water storage tank (9) via a water pump. A number of evenly arranged water pipes (11) are connected to the top of the diverter (10). The other end of the water pipes (11) is connected to a stirring box (12) via a one-way valve. A liquid pump (13) is connected to the bottom of the stirring box (12). A telescopic pipe (14) is connected to the output end of the liquid pump (13). A number of telescopic pipes (14) are respectively connected to a number of caps (6). A pH adjustment box (15) is symmetrically arranged on the top of the stirring box (12). The pH adjustment box (15) is connected to the stirring box (12) via a solenoid valve. The interior of the pH adjustment box (15) is filled with salt and alkali reagent.

2. The durability testing instrument for saline soil and water coupling environment concrete according to claim 1, characterized in that: A spiral heating wire (16) is fixedly connected to the outside of the placement cylinder (2), a heat insulation shell (17) is fixedly connected to the surface of the placement cylinder (2), a temperature and humidity sensor (18) is fixedly connected to the inside of the placement cylinder (2), and a pH sensor (19) is installed inside the stirring box (12).

3. The durability testing instrument for saline soil and water coupling environment concrete according to claim 2, characterized in that: The top of the support frame (3) is fixedly connected to several controllers (20) with displays, and the controllers (20) correspond one-to-one with several placement cylinders (2) and are used in conjunction with them. The controllers (20) are electrically connected to the electric lifting rod (4), pressure push rod (7), pressure sensor, diverter (10), liquid pump (13), solenoid valve, heating wire (16), temperature and humidity sensor (18) and pH sensor (19). The top of the base (1) is fixedly connected to a weighing device (21).

4. The durability testing instrument for saline soil and water coupling environment concrete according to claim 3, characterized in that: The top of the mixing box (12) is fixedly connected to a stirring motor (22), and the output end of the stirring motor (22) passes through the mixing box (12) and is fixedly connected to a stirring blade (23).

5. The durability testing instrument for saline soil and water coupling environment concrete according to claim 4, characterized in that: The base (1) has a drain chamber (24) inside, one end of the drain chamber (24) is connected to a drain pipe, the bottom of the placement cylinder (2) is connected to a drain hole, and the drain hole is connected to the drain chamber (24), and a drain valve (25) is fixedly connected inside the drain hole.

6. The durability testing instrument for saline soil and water coupling environment concrete according to claim 5, characterized in that: The bottom of the inner wall of the placing cylinder (2) is fixedly connected with an ejection push rod (26), and the output end of the ejection push rod (26) is fixedly connected with an ejection block (27).

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