Concrete test piece splitting device for impermeability test

Abstract

The utility model provides a concrete test piece splitting device for an impermeability test. The concrete test piece splitting device comprises an upper supporting assembly and a lower supporting assembly, the lower supporting assembly comprises a lower cushion plate and a lower cushion strip, the lower cushion plate is arranged in a circular shape, two grooves opposite in position are formed in the upper edge of the lower cushion plate in the diameter direction, and the two ends of the lower cushion strip are fixed into the grooves. The upper supporting assembly comprises an upper base plate and an upper filler strip, the upper base plate is arranged in a circular shape, two grooves opposite in position are formed in the lower edge of the upper base plate in the diameter direction, and the two ends of the upper filler strip are fixed into the grooves. In the using state, the upper filler strips and the lower filler strips in the upper supporting assembly and the lower supporting assembly are located in the same plane. The concrete test piece splitting device for the impermeability test has the advantages that a test piece can be stably placed, rapid centering is achieved, and personnel assistance is not needed.

Description

Technical Field

[0001] The utility model relates to the technical field of concrete impermeability, and specifically, to a splitting device for concrete specimens used in impermeability tests. Background Art

[0002] The concrete impermeability test is an important technical index for the durability performance of concrete, reflecting the water penetration resistance of concrete. In concrete tests, the impermeability performance belongs to the routine inspection of concrete durability and is of great significance to the service life of concrete.

[0003] After the pressure application of the impermeability test is completed and splitting is carried out, the specimen taken out from the impermeability tester is placed on the compression testing machine, and a steel cushion bar with a diameter of 6 mm should be placed along the diameter direction at the center of the upper and lower end faces of the specimen to ensure that they are in the same vertical plane. Then, start the compression testing machine to split the specimen into two halves along the longitudinal section. After the specimen is split, use a waterproof pen to trace the water mark and measure the water seepage height.

[0004] During this splitting process, when placing the steel cushion bars, it is necessary to accurately find the center positions of the upper and lower end faces of the specimen and ensure that they are in the same vertical plane. If the center positions are not accurately found, it will affect the symmetry of the specimen during splitting, thereby affecting the observation of the water seepage height and bringing inconvenience to the test.

[0005] Moreover, during the splitting test process, it is not easy to stably place the specimen on the steel cushion bars with a diameter of 6 mm, and during the downward pressing process of the compression testing machine, testers are required to assist in stabilizing the specimen, which has a certain safety risk. Content of the Utility Model

[0006] The purpose of the utility model is to address the deficiencies of the prior art, and thus provide a splitting device for concrete specimens used in impermeability tests that enables the specimen to be stably placed, realizes rapid centering, and does not require personnel assistance.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is: a splitting device for concrete specimens used in impermeability tests, including an upper support assembly and a lower support assembly;

[0008] The lower support assembly includes a lower backing plate and lower cushion bars. The lower backing plate is circularly arranged. Two oppositely positioned grooves are arranged along the diameter direction on the upper edge of the lower backing plate. The two ends of the lower cushion bars are fixed in the grooves, and the highest point of the lower cushion bars exceeds the surface of the lower backing plate;

[0009] The upper support assembly includes an upper backing plate and upper cushion bars. The upper backing plate is circularly arranged. Two oppositely positioned grooves are arranged along the diameter direction on the lower edge of the upper backing plate. The two ends of the upper cushion bars are fixed in the grooves, and the lowest point of the upper cushion bars exceeds the surface of the upper backing plate;

[0010] In the working state, the upper cushion strip and the lower cushion strip in the upper support assembly and the lower support assembly are in the same plane.

[0011] Preferably, downwardly extending upper retaining edges are provided around the upper base plate, and the lower ends of the upper retaining edges are lower than the lowest point of the upper cushion strip.

[0012] Preferably, upwardly extending lower retaining edges are provided around the lower base plate, and the upper ends of the lower retaining edges are higher than the highest point of the lower cushion strip.

[0013] Preferably, both the upper cushion strip and the lower cushion strip are steel bar cushion strips with a diameter between 6 mm and 10 mm.

[0014] Preferably, an upper gasket is connected to the inner side of the lower edge of the upper base plate. The upper gasket is made of a flexible material, and the lowest point of the upper gasket is at the same height as the lowest point of the upper cushion strip.

[0015] Preferably, a lower gasket is connected to the inner side of the upper edge of the lower base plate. The lower gasket is made of a flexible material, and the highest point of the lower gasket is at the same height as the highest point of the lower cushion strip.

[0016] Preferably, the upper gasket is arc-shaped, and the number of the upper gaskets is two, which are symmetrically distributed with the upper cushion strip as the center.

[0017] Preferably, the lower gasket is arc-shaped, and the number of the lower gaskets is two, which are symmetrically distributed with the lower cushion strip as the center.

[0018] Preferably, the diameter of the lower base plate is larger than the diameter of the upper base plate.

[0019] Preferably, the diameter ratio of the lower base plate to the upper base plate is 1 cm - 3 cm larger than the contour diameter of the test anti-seepage specimen.

[0020] The utility model has substantial features and progress compared with the prior art. Specifically, the upper support assembly and the lower support assembly designed by the utility model can be placed at the top and bottom of the test anti-seepage specimen during the splitting process under the pressure of the press, which is equivalent to setting hoods at the top and bottom of the anti-seepage specimen. On the one hand, it can support the anti-seepage specimen and prevent the cushion strip from slipping. On the other hand, it can provide a larger pressing surface for the press, eliminating the need for staff to hold it by hand and improving safety.

[0021] Furthermore, to prevent the anti-seepage specimen from tipping over after splitting, upper retaining edges and lower retaining edges are provided. After the anti-seepage specimen cracks, it is blocked by the retaining edges to prevent it from rolling to the periphery and affecting safety.

[0022] Furthermore, upper gaskets and lower gaskets are added, which are at the same height as the upper cushion strip and the lower cushion strip. When supporting the anti-seepage specimen, they can play a role in stable support, and due to their flexible characteristics, they will not affect the pressing of the press on the anti-seepage specimen. Brief Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the overall structure of the splitting device for concrete specimens used in the impermeability test of the present utility model.

[0024] Figure 2 It is a schematic three-dimensional structure diagram of the upper and lower support components of the present utility model.

[0025] Figure 3 It is a schematic plan structure diagram of the upper and lower support components of the present utility model.

[0026] In the figure: 1. Lower backing plate; 2. Lower cushion bar; 3. Lower gasket; 4. Upper backing plate; 5. Upper cushion bar; 6. Upper gasket. Detailed Description of the Preferred Embodiment

[0027] Next, through the detailed description of the preferred embodiment, the technical solution of the present utility model will be further described in detail.

[0028] As Figures 1 - 3 shown, a splitting device for concrete specimens used in the impermeability test includes an upper support component and a lower support component.

[0029] The lower support component includes a lower backing plate 1 and a lower cushion bar 2. The lower backing plate 1 is circularly arranged. Two opposite grooves are arranged along the diameter direction on the upper edge of the lower backing plate 1. Both ends of the lower cushion bar 2 are fixed in the grooves, and the highest point of the lower cushion bar 2 exceeds the surface of the lower backing plate 1;

[0030] The upper support component includes an upper backing plate 4 and an upper cushion bar 5. The upper backing plate 4 is circularly arranged. Two opposite grooves are arranged along the diameter direction on the lower edge of the upper backing plate 4. Both ends of the upper cushion bar 5 are fixed in the grooves, and the lowest point of the upper cushion bar 5 exceeds the surface of the upper backing plate 4;

[0031] In this embodiment, both the upper cushion bar 5 and the lower cushion bar 2 are steel bar cushion bars with a diameter between 6 mm and 10 mm.

[0032] In the working state, the upper cushion bar 5 and the lower cushion bar 2 in the upper support component and the lower support component are in the same plane.

[0033] Description of the working principle:

[0034] During use, place the lower support component on the lower platen of the press, place the impermeability specimen on the lower support component, and adjust the center of the impermeability specimen to correspond to the lower pressing bar;

[0035] Then cover the upper support component on the top of the impermeability specimen, and adjust the position of the upper pressing bar to be in the central area of the impermeability specimen.

[0036] After the adjustment is completed, control the upper platen of the press to press down. According to the specification requirements, load and start the splitting process of the impermeability specimen. The upper and lower platens of the press apply force to the impermeability specimen through the support components at the upper and lower parts. Due to the convex design of the upper pressing strip and the lower pressing strip, the pressure is concentrated here, and finally the impermeability specimen is split from the central position.

[0037] To prevent the impermeability specimen from rolling to both sides suddenly under the action of pressure after splitting and causing danger, downward-extending upper side edges are provided around the upper backing plate 4, and the lower ends of the upper side edges are lower than the lowest point of the upper cushion strip 5. Upward-extending lower side edges are provided around the lower backing plate 1, and the upper ends of the lower side edges are higher than the highest point of the lower cushion strip 2.

[0038] When the impermeability specimen rolls outwards, it is blocked by the upper side edge and the lower side edge, thereby hindering the continuous rolling action of the impermeability specimen and ensuring safety.

[0039] Since the impermeability specimen cannot be placed stably and will have a certain inclination angle when there are only the upper cushion strip and the lower cushion strip, in other embodiments, an upper gasket 6 is connected to the inner side of the lower edge of the upper backing plate 4. The material of the upper gasket is a flexible material, and the lowest point of the upper gasket is at the same height as the lowest point of the upper cushion strip. A lower gasket 3 is connected to the inner side of the upper edge of the lower backing plate 1. The material of the lower gasket 3 is a flexible material, and the highest point of the lower gasket is at the same height as the highest point of the lower cushion strip. The material can be selected from elastic materials such as sponge, foam, and rubber. Its height is the same as the height of the cushion strip on the backing plate. When the impermeability specimen is placed on the backing plate, it can support the specimen, and during the downward pressing process of the pressure testing machine, it can deform with compression and return to its original state after unloading.

[0040] In terms of shape design, the upper gasket is arc-shaped, the number of the upper gaskets is two, and they are symmetrically distributed with the upper cushion strip as the center. The lower gasket is arc-shaped, the number of the lower gaskets is two, and they are symmetrically distributed with the lower cushion strip as the center.

[0041] Since the impermeability specimen is usually in the shape of a frustum of a cone, the diameter of the lower backing plate is larger than the diameter of the upper backing plate. The diameter ratio of the lower backing plate to the upper backing plate is 1 cm - 3 cm larger than the contour diameter of the tested impermeability specimen to solve the support problem of the impermeability specimen.

[0042] When splitting the water-resistance test piece, this device is similar to placing a "hat" at the upper and lower ends of the test piece. The water-resistance test piece can be stably placed in the device without the help of external force. The upper and lower pads are slightly larger in diameter than the upper and lower surfaces of the water-resistance test piece, which makes it easy to ensure that the pad is located in the center of the water-resistance test piece; the gasket on the pad can help the water-resistance test piece to be firmly placed in the device; the pad on the pad is used to split the test piece under the action of pressure; the fence around the pad can effectively prevent the pad from spreading to both sides after splitting. With this device, the test piece does not need to be marked with the center position before the test, and there is no need for personnel to hold the test piece during the pressure application process, which improves the efficiency of splitting the water-resistance test piece and avoids the safety risks that may arise to the test personnel during the splitting test. The device is simple to process, easy to operate, and has significant effects, and has been recognized by the test personnel.

[0043] Finally, it should be noted that: The above describes in detail the preferred embodiments of this patent, but this patent is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A splitting device for concrete specimens used in impermeability tests, characterized in that: It includes an upper support assembly and a lower support assembly; The lower support assembly includes a lower backing plate and a lower cushion bar. The lower backing plate is circularly arranged. Two opposite grooves are arranged along the diameter direction on the upper edge of the lower backing plate. Both ends of the lower cushion bar are fixed in the grooves, and the highest point of the lower cushion bar exceeds the surface of the lower backing plate; The upper support assembly includes an upper backing plate and an upper cushion bar. The upper backing plate is circularly arranged. Two opposite grooves are arranged along the diameter direction on the lower edge of the upper backing plate. Both ends of the upper cushion bar are fixed in the grooves, and the lowest point of the upper cushion bar exceeds the surface of the upper backing plate; In the use state, the upper cushion bar and the lower cushion bar in the upper support assembly and the lower support assembly are in the same plane.

2. The splitting device for concrete specimens used in impermeability test according to claim 1, characterized in that: A downward-extending upper edge guard is arranged around the upper backing plate, and the lower end of the upper edge guard is lower than the lowest point of the upper cushion bar.

3. The splitting device for concrete specimens used in the impermeability test according to claim 2, characterized in that: An upward-extending lower edge guard is arranged around the lower backing plate, and the upper end of the lower edge guard is higher than the highest point of the lower cushion bar.

4. The splitting device for concrete specimens used in impermeability test according to claim 2 or 3, characterized in that: Both the upper cushion bar and the lower cushion bar are steel bar cushion bars with a diameter between 6 mm and 10 mm.

5. The splitting device for concrete specimens used in impermeability test according to claim 4, characterized in that: A upper gasket is connected to the inner side of the lower edge of the upper backing plate. The material of the upper gasket is a flexible material, and the lowest point of the upper gasket is at the same height as the lowest point of the upper cushion bar.

6. The splitting device for concrete specimens used in impermeability test according to claim 5, wherein: A lower gasket is connected to the inner side of the upper edge of the lower backing plate. The material of the lower gasket is a flexible material, and the highest point of the lower gasket is at the same height as the highest point of the lower cushion bar.

7. The splitting device for concrete specimens used in impermeability test according to claim 6, characterized in that: The upper gasket is arc-shaped, and the number of the upper gaskets is two, which are symmetrically distributed with the upper cushion bar as the center.

8. The splitting device for concrete specimens used in impermeability tests according to claim 7, wherein: The lower gasket is arc-shaped, and the number of the lower gaskets is two, which are symmetrically distributed with the lower cushion bar as the center.

9. The splitting device for concrete specimens used in the impermeability test according to claim 8, characterized in that: The diameter of the lower backing plate is larger than the diameter of the upper backing plate.

10. The splitting device for concrete specimens used in the impermeability test according to claim 9, characterized in that: The diameter ratio of the lower backing plate to the upper backing plate is 1 cm - 3 cm larger than the contour diameter of the tested anti-seepage specimen.

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