A concrete durability experimental test device

Abstract

The utility model provides a kind of concrete durability experimental test equipment, including detection box and the placing box located in the inside of detection box, the top of placing box is equipped with threaded press bar and passes through movable installation.When threaded press bar is pressed, pressure is applied to spring support, and the pressure of concrete slab is increased from top to bottom, and the edge corner and central part of concrete slab are pressed, and then its compressive durability experiment is carried out, and salt water flows from the bottom of placing box to the top, to sequentially penetrate concrete slab, the water level drop depth of salt water penetration into placing box in detection box, and the time length of water surface penetration drop, and the penetration of salt water to concrete slab is observed by transparent placing box and detection box, and then the salt water penetration durability experiment of different layers of concrete slab under different liquid level pressure difference is carried out, to facilitate the simulation of penetration superposition experiment test under pressure environmental conditions.

Description

Technical Field

[0001] This utility model relates to the field of concrete testing, specifically a concrete durability testing device. Background Technology

[0002] In the field of civil engineering, the durability of concrete structures is directly related to the safety performance, service life, and maintenance costs of projects. With the continuous development of infrastructure construction, the demand for concrete structures to serve in complex environments (such as marine, saline-alkali land, cold regions, and industrial corrosive environments) is increasing. During long-term use, concrete structures are susceptible to the combined effects of various factors such as chloride ion corrosion, freeze-thaw cycles, carbonation, and sulfate corrosion, leading to reduced strength, structural cracking, and even failure. Therefore, experimental evaluation of concrete durability is crucial.

[0003] In order to ensure that the concrete used meets the construction standards, experimental samples of concrete are usually made before construction, and experiments are conducted by simulating some environmental factors. However, when conducting experiments on different concrete samples, the traditional experimental equipment has limited testing functions and is not convenient for superimposed experimental tests under multiple environmental conditions. This makes it difficult for some experimental results to reflect the actual working conditions, thereby reducing the experimental effect and the reliability of experimental data.

[0004] Therefore, we provide a test device for concrete durability. Utility Model Content

[0005] The main purpose of this utility model is to provide a concrete durability test equipment, which can effectively solve the problem mentioned in the background art that the traditional test equipment has a single test function, is not convenient for superimposed test under multiple environmental conditions, and makes it difficult for some test results to reflect the actual working conditions, thereby reducing the reliability of the test effect and test data.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A concrete durability test device includes a test box and a placement box located inside the test box. A threaded pressure rod is movably installed through the top of the placement box, and a limiting block for limiting rotation is fixedly connected to the bottom of the threaded pressure rod. A pressure plate is provided at the bottom of the threaded pressure rod, and the pressure plate and the limiting block are nested and movably connected. The placement box is equipped with multiple concrete slabs that are equidistantly fitted inside, and the outer side of each concrete slab is nested with an inlay frame. A sealing strip is fixedly installed around the outer side of the inlay frame, and the sealing strip is sealed and fitted to the inner wall of the placement box. Spring supports located at the four corners and the center are respectively fitted into the two-layer space formed by every three concrete slabs.

[0007] In the above scheme, preferably, both the testing box and the placement box are made of transparent material, and both the upper and lower ends of the testing box and the placement box are nested with reinforcing frames. The inside of the testing box is vertically arranged with four limiting rods for limiting the position of the placement box inside.

[0008] In the above scheme, preferably, two support blocks are symmetrically provided below the placement box and fixedly installed at the bottom of the detection box for water penetration, and a drain pipe is provided through one side of the detection box.

[0009] In the above scheme, preferably, a sealing cap for sealing is movably fitted inside one end of the drain pipe, a servo motor is fixedly installed on one side of the sealing cap, and a battery for providing power is electrically connected to one side of the servo motor, and a stirring blade is nested on the drive shaft of the servo motor.

[0010] In the above scheme, preferably, the lower sides of the placement box are symmetrically provided with insertion holes, and the inner side of each insertion hole is provided with a support rod for supporting the concrete slab inside the placement box.

[0011] In the above scheme, preferably, the top of the threaded pressure rod is fixedly connected to a handle that facilitates its rotation, the concrete slab and the inlay frame are coated with adhesive to seal the two, and the test box is filled with saline-alkali water at the same level as the top surface of the pressure plate.

[0012] Compared with the prior art, the present invention has the following beneficial effects: This concrete durability testing equipment consists of a placement box, spring supports, and a frame. When the threaded rod is pressed down, pressure is applied to the spring supports, increasing the pressure from top to bottom through the concrete slab. Pressure is also applied to the edges and center of the concrete slab to conduct a compressive durability test. Salt-alkali water flows from the bottom of the placement box upwards, penetrating the concrete slab sequentially. The depth of water drop in the placement box is measured, and the time it takes for the water to drop is observed. The penetration of salt-alkali water into the concrete slab is also monitored through the transparent placement box and testing box. This allows for the testing of different layers of concrete slabs under different liquid level pressure differences, simulating the superimposed penetration test under pressure conditions.

[0013] This concrete durability testing equipment is equipped with a servo motor, a battery, and a stirring blade. The servo motor is fixed to one side of the sealed cover and powered by the battery. Its drive shaft drives the stirring blade to rotate, agitating the saline-alkali water in the test chamber, increasing the fluidity of the medium, and thus simulating the water flow environment in the natural environment. At the same time, it prevents the saline-alkali water from standing still and ensures that the medium concentration is uniform. Secondly, both the test chamber and the placement chamber are made of transparent material so that the experimenters can observe the experimental status of the concrete slab in real time. The reinforcing frames at the top and bottom of the test chamber and the placement chamber effectively improve the overall strength of the chamber and prevent deformation caused by internal pressure. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0016] Figure 2 This is a schematic diagram of the internal structure of the detection box in this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the placement box in this utility model.

[0018] Figure 4 This is a schematic diagram showing the disassembled structure of the concrete slab and the inlay frame in this utility model.

[0019] Figure 5 This is a schematic diagram showing the disassembled structure of the sealing cap and the drain pipe in this utility model.

[0020] Figure 1 - Figure 5 In the middle: 1. Testing box; 101. Support block; 2. Placement box; 201. Support rod; 202. Insertion hole; 3. Threaded pressure rod; 301. Handle; 302. Limit block; 4. Limit rod; 5. Drain pipe; 6. Sealing cover; 601. Servo motor; 602. Battery; 603. Mixing blade; 7. Concrete slab; 8. Inlay frame; 801. Sealing strip; 9. Spring support; 10. Pressure plate. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1- Figure 5 As shown, in this embodiment, a concrete durability test device includes a test box 1 and a placement box 2 located inside the test box 1. A threaded pressure rod 3 is movably installed through the top of the placement box 2, and a limiting block 302 for limiting rotation is fixedly connected to the bottom of the threaded pressure rod 3. A pressure plate 10 is provided at the bottom of the threaded pressure rod 3, and the pressure plate 10 and the limiting block 302 are nested and movably connected. Multiple concrete slabs 7 are equidistantly embedded inside the placement box 2, and an inlay frame 8 is nested and connected to the outside of the concrete slabs 7. A sealing strip 801 is fixedly installed around the outside of the inlay frame 8, and the sealing strip 801 is sealed and fitted to the inner wall of the placement box 2. Spring supports 9 located at the four corners and the center are respectively embedded in the two-layer space formed by three concrete slabs 7. Insertion holes 202 are symmetrically provided through the lower two sides of the placement box 2, and support rods 201 for supporting the concrete slabs 7 inside the placement box 2 are installed through the inner side of each insertion hole 202. Specifically, this design allows the handle 301 to facilitate the operator's rotation of the threaded pressure rod 3. The threaded pressure rod 3 engages with the threaded structure on the top of the placement box 2, enabling vertical movement and providing venting space through the gap between them. The limiting block 302 is fixed to the bottom of the threaded pressure rod 3, nested with the pressure plate 10, and does not drive the pressure plate 10 to rotate synchronously. This ensures that when the threaded pressure rod 3 rotates, the pressure plate 10 only moves in the vertical direction, avoiding torsional force on the concrete slab 7. Multiple concrete slabs 7 are equidistantly distributed within the placement box 2. The inlay frame 8 wraps around the edges of the concrete slabs 7, and the sealing strip 801 fits tightly against the inner wall of the placement box 2, forming an independent sealed space. In the two-layer space formed by every three concrete slabs 7, the spring supports 9 at the four corners and the center provide elastic support for the concrete slabs 7. When the threaded pressure rod 3 is pressed down, pressure is applied to the spring supports 9, which then exert pressure through the concrete slabs 7. The pressure increases from top to bottom, applying pressure to the corners and center of the concrete slab 7 to conduct a compressive durability test. The support rod 201 passes through the insertion hole 202, forming a lateral support for the concrete slab 7 from both sides of the placement box 2, thereby preventing the bottom layer of concrete slab 7 from falling out of the placement box 2, enhancing structural stability, and facilitating the installation or replacement of specimens. Under the action of the height pressure difference, the saline-alkali water flows from bottom to top through the bottom of the placement box 2, penetrating the concrete slab 7 in sequence. The depth of water level drop in the placement box 2 is measured by the saline-alkali water in the detection box 1, and the time of water level drop is observed by the transparent placement box 2 and detection box 1. The permeation of the saline-alkali water into the concrete slab 7 is then tested for different layers of concrete slab 7 under different liquid level pressure differences.

[0023] like Figure 1 - Figure 5As shown, in this embodiment, two support blocks 101 are symmetrically arranged below the placement box 2 and fixedly installed at the bottom of the detection box 1 for water permeation. A drain pipe 5 is provided through one side of the detection box 1. A sealing cover 6 for sealing is movably installed inside one end of the drain pipe 5. A servo motor 601 is fixedly installed on one side of the sealing cover 6, and a battery 602 for providing power is electrically connected to one side of the servo motor 601. A stirring blade 603 is nested on the drive shaft of the servo motor 601. Specifically, with this setup, the support block 101 is fixed to the bottom of the test chamber 1, raising the placement chamber 2 and creating a gap between the bottom of the placement chamber 2 and the bottom of the test chamber 1, providing space for the flow of saline-alkali water. This ensures that the concrete slab 7 at the bottom of the placement chamber 2 can fully contact the corrosive medium. The drain pipe 5 runs through one side of the test chamber 1 to discharge the saline-alkali water or other corrosive media inside the chamber. The sealing cover 6 fits into the drain pipe 5 to achieve pipe sealing and prevent saline-alkali water leakage during the experiment. The servo motor 601 is fixed to one side of the sealing cover 6 and is powered by the battery 602. Its drive shaft drives the stirring blade 603 to rotate, stirring the saline-alkali water inside the test chamber 1, increasing the fluidity of the medium, thereby simulating the water flow environment in the natural environment, while preventing the saline-alkali water from standing still and ensuring uniform medium concentration.

[0024] like Figure 1 - Figure 4 As shown, in this embodiment, both the test box 1 and the placement box 2 are made of transparent material, and both the upper and lower ends of the test box 1 and the placement box 2 are nested with reinforcing frames. Inside the test box 1, four limiting rods 4 are vertically arranged to limit the position of the placement box 2 inside. The top of the threaded pressure rod 3 is fixedly connected to a handle 301 that facilitates its rotation. The concrete slab 7 and the inlay frame 8 are coated with adhesive to seal the two. The test box 1 is filled with saline-alkali water that is level with the top surface of the pressure plate 10. Specifically, through this setup, the testing box 1 and the placement box 2 are made of transparent materials (such as tempered glass), allowing experimenters to observe the experimental status of the concrete slab 7 in real time. The reinforcing frames (such as metal frames) at the top and bottom of the testing box 1 and the placement box 2 enhance the overall strength of the box body, preventing deformation due to internal pressure. Four limiting rods 4 are vertically fixed inside the testing box 1, limiting the position of the placement box 2 from all sides to prevent the placement box 2 from shifting during placement. The handle 301 at the top of the threaded pressure rod 3 provides a convenient point of force application for the operator. The adhesive between the concrete slab 7 and the inlay frame 8 further enhances the sealing performance, allowing saline-alkali water to only penetrate into the placement box 2 through the concrete slab 7. The liquid level of the saline-alkali water in the testing box 1 is kept flush with the top surface of the pressure plate 10, keeping the concrete slab 7 at the immersion depth, simulating the erosion conditions in the intertidal environment.

[0025] Working principle: During use, both the test box 1 and the placement box 2 are made of transparent material so that the experimenters can observe the experimental status of the concrete slab 7 in real time. The reinforcing frames at the top and bottom of the test box 1 and the placement box 2 effectively improve the overall strength of the box body and prevent deformation caused by internal pressure. Four limiting rods 4 are vertically fixed inside the test box 1 to limit the position of the placement box 2 from all sides and prevent it from shifting during placement. The handle 301 at the top of the threaded pressure rod 3 provides a convenient force application point for the operator. The adhesive between the concrete slab 7 and the inlay frame 8 further enhances the sealing performance, ensuring that the salt and alkali water can only penetrate into the placement box 2 through the concrete slab 7. The salt and alkali water level in the test box 1 is kept flush with the top surface of the pressure plate 10, so that the concrete slab 7 is in an immersed state, simulating the erosion conditions in the intertidal environment. Support block 101 is fixed to the bottom of test box 1, raising the placement box 2 so that its bottom is gapped with the bottom of test box 1, providing space for the flow of saline-alkali water and ensuring that the concrete slab 7 at the bottom of placement box 2 can fully contact the corrosive medium. Drain pipe 5 runs through one side of test box 1 to discharge saline-alkali water or other corrosive media in the box. Sealing cover 6 fits into drain pipe 5 to seal the pipe and prevent saline-alkali water from leaking during the experiment. Servo motor 601 is fixed to one side of sealing cover 6 and powered by battery 602. Its drive shaft drives stirring blade 603 to rotate, stirring the saline-alkali water in test box 1, increasing the fluidity of the medium, simulating the water flow environment in the natural environment, and preventing the saline-alkali water from standing still, ensuring uniform medium concentration. The handle 301 facilitates the operator to apply force to rotate the threaded pressure rod 3. The threaded pressure rod 3 engages with the threaded structure on the top of the placement box 2 to achieve up and down movement, and provides venting space through the gap between the two. The limiting block 302 is fixed to the bottom of the threaded pressure rod 3 and nested with the pressure plate 10 without driving the pressure plate 10 to rotate synchronously. This ensures that when the threaded pressure rod 3 rotates, the pressure plate 10 only moves in the vertical direction, avoiding torsional force on the concrete slab 7. Multiple concrete slabs 7 are evenly distributed in the placement box 2. The inlay frame 8 wraps around the edge of the concrete slab 7. The sealing strip 801 is tightly fitted with the inner wall of the placement box 2 to form an independent sealed space. In the two-layer space formed by every three concrete slabs 7, the spring supports 9 at the four corners and the center provide elastic support for the concrete slab 7. When the threaded pressure rod 3 is pressed down, pressure is applied to the spring supports 9. The pressure increases from top to bottom through the concrete slab 7 and applies pressure to the corners and center of the concrete slab 7, thereby conducting a compressive strength durability test. The support rod 201 passes through the insertion hole 202 and forms a lateral support for the concrete slab 7 from both sides of the placement box 2, preventing the bottom concrete slab 7 from falling out of the placement box 2, enhancing structural stability, and facilitating the installation or replacement of the specimen. Under the action of height pressure difference, the saline-alkali water flows from bottom to top through the bottom of the placement box 2 and permeates the concrete slab 7 in sequence. The depth of water level drop and the duration of water level drop in the placement box 2 are measured by the saline-alkali water in the test box 1. The permeation of the saline-alkali water into the concrete slab 7 is observed through the transparent placement box 2 and test box 1. Thus, the saline-alkali water permeation durability test is carried out on different layers of concrete slab 7 under different liquid level pressure differences.

[0026] The preferred embodiments of the present invention disclosed above are merely illustrative of the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific implementations. The present invention is not limited to the above embodiments; the embodiments and descriptions in the specification are merely outlining the principles of the present invention. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A concrete durability testing device, comprising a testing chamber (1) and a placement box (2) located inside the testing chamber (1), characterized in that: A threaded pressure rod (3) is movably installed through the top of the placement box (2), and a limiting block (302) for limiting rotation is fixedly connected to the bottom of the threaded pressure rod (3). A pressure plate (10) is provided at the bottom of the threaded pressure rod (3), and the pressure plate (10) and the limiting block (302) are nested and movably connected. The placement box (2) is equipped with multiple concrete slabs (7) that are equidistantly fitted inside, and the outer side of the concrete slabs (7) is connected to a frame (8). A sealing strip (801) is fixedly installed around the outer side of the frame (8), and the sealing strip (801) is sealed and fitted to the inner wall of the placement box (2). Spring supports (9) located at the four corners and the center are respectively fitted into the two-layer space formed by three concrete slabs (7).

2. The concrete durability testing equipment according to claim 1, characterized in that, Both the detection box (1) and the placement box (2) are made of transparent material, and both the upper and lower ends of the detection box (1) and the placement box (2) are nested with reinforcing frames. The inside of the detection box (1) is vertically provided with four limiting rods (4) for limiting the position of the placement box (2) inside.

3. The concrete durability testing equipment according to claim 1, characterized in that, Two support blocks (101) are symmetrically installed at the bottom of the placement box (2) for water penetration, and a drain pipe (5) is provided through one side of the detection box (1).

4. The concrete durability testing equipment according to claim 3, characterized in that, A sealing cap (6) for sealing is movably fitted inside one end of the drain pipe (5). A servo motor (601) is fixedly installed on one side of the sealing cap (6), and a battery (602) for providing power is electrically connected to one side of the servo motor (601). An stirring blade (603) is nested on the drive shaft of the servo motor (601).

5. The concrete durability testing equipment according to claim 1, characterized in that, The placement box (2) has symmetrical through holes (202) on both sides below, and the inner side of each through hole (202) is fitted with a support rod (201) for supporting the concrete slab (7) inside the placement box (2).

6. The concrete durability testing equipment according to claim 1, characterized in that, The top of the threaded pressure bar (3) is fixedly connected to a handle (301) for easy rotation. The concrete slab (7) and the inlay frame (8) are coated with adhesive to seal the two. The test box (1) is filled with saline-alkali water at the same level as the top surface of the pressure plate (10).

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