A sealing device for concrete impermeability test

Abstract

The utility model discloses a kind of concrete impermeability test sealing devices, including vibration table and the conical sleeve mould fixed on vibration table, sleeve mould is used to place conical concrete test piece, lower mechanism is provided above concrete test piece, funnel is provided at sleeve mould top end opening, funnel bottom end is connected with several pins, pin is inserted between sleeve mould and concrete test piece, the gap between concrete test piece and sleeve mould is used to fill sealing material.The utility model sets up conical sleeve mould and concrete test piece, fills the gap between the both by funnel flow guiding with powdery sealing material, and promotes sealing material evenly distributed in gap by vibration table, after forming sealing effect by lower mechanism and being pressed down concrete test piece to compact powdery sealing material, effectively prevent water from concrete test piece and sleeve mould between seepage, ensure the sealing property in detection process, to improve detection precision and success rate.

Description

Technical Field

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

[0002] Concrete impermeability testing is used to evaluate concrete's ability to resist water pressure penetration, directly related to its durability and waterproofing performance. By simulating a water pressure environment, the test quantifies the concrete's impermeability, ensuring that the structure does not leak in humid or water-pressured environments, thereby extending its service life and reducing maintenance costs. The sealing effect under simulated water pressure is crucial for the test's success; therefore, a good sealing device for the impermeability test is essential.

[0003] Existing concrete anti-seepage sealing methods include: (1) Paraffin wax + rosin sealing method, where paraffin wax and rosin are heated and melted in a certain ratio (e.g., 3:1), applied to the side of the specimen, and pressed into the mold to harden and form a waterproof layer; the advantage of this method is that the cost is low, but heating paraffin wax and rosin during the test will produce harmful gases, and the high temperature of the melted wax may damage the concrete surface, making it difficult to completely seal micro-cracks and potentially causing side seepage. (2) Special sealant (e.g., epoxy resin, silicone rubber), where a sealant with high adhesion and good flexibility is applied evenly to the side of the specimen, and after curing, it is pressed into the mold to form a waterproof layer; the advantage of this method is that it has good sealing performance, adapts to small deformations of concrete, is resistant to water pressure, and is not easy to fall off, but the curing time is long (e.g., epoxy resin requires 24 hours), the sealant is easy to contaminate equipment and other places, and it is difficult to apply the sealant evenly and uniformly, resulting in a large amount of cleaning work after the test and a high cost. (3) Rubber sleeve (or plastic sleeve) sealing: an elastic rubber sleeve is put on the outside of the specimen and pressed into the mold to form a waterproof layer. The advantage of this method is that it saves time and is easy to operate. However, if the rubber sleeve is aged or not tightened properly, side leakage is likely to occur. In addition, this method requires a high degree of smoothness on the side of the specimen. Utility Model Content

[0004] This invention addresses the shortcomings of existing technologies by providing a sealing device for concrete impermeability testing. It consists of a conical mold and a concrete specimen. A funnel guides the flow, filling the gap between the two with a fast-setting powdered sealing material. A vibration table promotes the uniform distribution of the powdered sealing material within the gap. A pressing mechanism then compresses the concrete specimen, compacting the powdered sealing material to create a seal. This effectively prevents water from seeping between the concrete specimen and the mold, ensuring a tight seal during the testing process and thus improving testing accuracy and success rate.

[0005] To address the aforementioned technical problems, this utility model provides a sealing device for a concrete impermeability test, comprising a vibration table and a conical mold fixed to the vibration table. The mold is used to place a conical concrete specimen. A pressing mechanism is provided above the concrete specimen. A funnel is provided at the top opening of the mold, and several pins are connected to the bottom of the funnel. The pins extend between the mold and the concrete specimen to control the gap between the concrete specimen and the mold. The gap between the concrete specimen and the mold is used to fill with sealing material.

[0006] This invention relates to a sealing device with a conical mold and a matching conical concrete specimen. A prong extends between the mold and the concrete specimen to ensure a uniform gap. A funnel guides the flow of a fast-setting powdered sealing material (e.g., a mixture of fly ash and sealant) into the gap. Under the action of a vibrating table, the powdered sealing material is evenly distributed within the gap. A pressing mechanism presses the concrete specimen down until its top is flush with the top of the mold, simultaneously compacting the sealing material and achieving a seal. This effectively prevents water from seeping between the concrete specimen and the mold, ensuring a tight seal during testing and thus improving testing accuracy and success rate.

[0007] Furthermore, it also includes an electromagnetic base, which is embedded in the vibration table and fixed to the vibration table by bolts.

[0008] Furthermore, the electromagnetic base is located directly below the mold, and the electromagnetic base is used to attract and fix the mold to prevent the mold from shifting.

[0009] Furthermore, a sealing ring is fitted at the bottom of the concrete specimen, and the sealing ring is located in the gap between the concrete specimen and the mold, thereby sealing the bottom of the gap between the concrete specimen and the mold.

[0010] Furthermore, the sealing ring has a semi-circular cross-section, with the flat side of the semi-circular ring attached to the concrete specimen and the arc side positioned close to the mold. The sealing ring ensures the initial distance between the mold and the concrete specimen while preventing the sealing material from leaking out from the bottom.

[0011] Furthermore, the pin is cylindrical with a diameter of 2-5mm and a length of 20-50mm.

[0012] Furthermore, the number of the inserts is 3-5, preferably 3. By inserting the inserts between the concrete specimen and the mold, a relatively consistent gap can be formed between the concrete specimen and the mold, so that the sealant can be evenly filled into the gap.

[0013] Furthermore, the mold has the same taper as the concrete specimen.

[0014] Furthermore, the inner diameter of the top end of the mold is larger than the inner diameter of the bottom end.

[0015] Furthermore, the pressing mechanism is an electric hydraulic pressure jack.

[0016] The working process of the concrete impermeability test sealing device is as follows: Place the semi-circular sealing ring on the small end of the concrete specimen and insert it into the mold. At this point, the top of the concrete specimen protrudes from the mold. Place the funnel at the top of the mold and insert the three prongs of the funnel into the gap between the concrete specimen and the mold. Evenly place approximately 200g of fast-setting powdered sealant (fly ash: sealant mass ratio = 4:1) between the concrete specimen and the funnel. Activate the electromagnetic base to hold the steel mold, and start the vibration table. Under gravity, the powdered sealant will evenly sink into the gap between the concrete specimen and the mold. Activate the electric hydraulic jack to press the concrete specimen into the mold, making the top of the concrete specimen and the mold flush. At this point, the powdered sealant in the gap between the concrete specimen and the mold is compacted. Evenly drip approximately 40g of water around the compacted sealant surface to achieve rapid setting and sealing. The test can then begin.

[0017] The beneficial effects of this utility model are:

[0018] This invention relates to a sealing device with a conical mold and a matching conical concrete specimen. A pin extends between the mold and the concrete specimen to ensure a uniform gap. A funnel guides the flow of a fast-setting powdered sealing material into the gap. Under the action of a vibrating table, the powdered sealing material is evenly distributed within the gap. A pressing mechanism presses the concrete specimen down until its top is flush with the top of the mold, simultaneously compacting the sealing material and achieving a seal. This effectively prevents water from seeping between the concrete specimen and the mold, ensuring a tight seal during testing and thus improving testing accuracy and success rate. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the concrete impermeability test sealing device of this utility model;

[0021] The labels in the diagram are as follows: 1. Vibration table, 2. Mold, 3. Concrete specimen, 4. Pressing mechanism, 5. Funnel, 6. Insert, 7. Sealing material, 8. Electromagnetic base, 9. Sealing ring. Detailed Implementation

[0022] The technical solution of this utility model will be clearly and completely described below with reference to specific embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figure 1 As shown, this embodiment provides a sealing device for a concrete impermeability test, including a vibration table 1 and a conical mold 2 fixed on the vibration table 1. The mold 2 is used to place a conical concrete specimen 3. A pressing mechanism 4 is provided above the concrete specimen 3. A funnel 5 is provided at the top opening of the mold 2. Several pins 6 are connected to the bottom of the funnel 5. The pins 6 extend between the mold 2 and the concrete specimen 3 to control the gap between the concrete specimen 3 and the mold 2. The gap between the concrete specimen 3 and the mold 2 is used to fill the sealing material 7. In this embodiment, the sealing device is equipped with a conical mold 2 and a matching conical concrete specimen 3. The insert 6 extends between the mold 2 and the concrete specimen 3 to ensure a uniform gap between them. The funnel 5 guides the quick-setting powdered sealing material 7 into the gap. Under the action of the vibrating table 1, the powdered sealing material 7 is evenly distributed in the gap. The pressing mechanism 4 presses down on the concrete specimen 3 until the top of the concrete specimen 3 is flush with the top of the mold 2, thereby compacting the sealing material 7 and achieving a sealing effect. This effectively prevents water from seeping out from between the concrete specimen 3 and the mold 2, ensuring the sealing performance during the testing process, thereby improving the testing accuracy and success rate.

[0024] In a preferred embodiment, an electromagnetic base 8 is also included. The electromagnetic base 8 is embedded in the vibration table 1 and fixed to the vibration table 1 by bolts. The electromagnetic base 8 is located directly below the mold 2 and is used to attract and fix the mold 2 to prevent the mold 2 from shifting.

[0025] In a preferred embodiment, a sealing ring 9 is fitted onto the bottom of the concrete specimen 3. The sealing ring 9 is located in the gap between the concrete specimen 3 and the mold 2, and the bottom of the gap between the concrete specimen 3 and the mold 2 is sealed by the sealing ring 9. The cross-section of the sealing ring 9 is semi-circular. The flat side of the semi-circular ring is attached to the concrete specimen 3, and the arc side is set close to the mold 2. The sealing ring 9 ensures the initial distance between the mold 2 and the concrete specimen 3, and at the same time prevents the sealing material 7 from leaking out from the bottom.

[0026] In a preferred embodiment, the height of the concrete specimen 3 is 140-160mm, preferably 150mm; the insert 6 is cylindrical with a diameter of 2-5mm, preferably 3mm, and a length of 20-50mm, preferably 30-40mm; the number of inserts 6 is 3-5, preferably 3. By inserting the inserts 6 between the concrete specimen 3 and the mold 2, a relatively consistent gap can be formed between the concrete specimen 3 and the mold 2, so that the sealant 7 can be evenly filled into the gap.

[0027] In a preferred embodiment, the mold 2 has the same taper as the concrete specimen 3, which facilitates consistent vertical gaps between the mold 2 and the concrete specimen 3, thereby achieving uniform vertical distribution of the sealing material 7. The inner diameter of the top end of the mold 2 is larger than that of the bottom end, which facilitates the uniform downward movement and distribution of the powdered sealing material 7 under the action of the vibration table 1 and gravity. The pressing mechanism 4 is an electric hydraulic press.

[0028] In this embodiment, the working process of the concrete impermeability test sealing device is as follows: The semi-circular sealing ring 9 is placed on the small end of the bottom of the concrete specimen (150mm high) and then inserted into the mold 2. At this time, the top of the concrete specimen 3 protrudes from the mold 2. (Refer to...) Figure 1 Place funnel 5 on the top of mold 2 and insert the three prongs 6 (3mm in diameter and 35mm in height) of funnel 5 into the gap between concrete specimen 3 and mold 2. Evenly place about 200g of fast-setting powdered sealant 7 (fly ash: sealant mass ratio = 4:1) between concrete specimen 3 and funnel 5. Start electromagnetic base 8 to hold steel mold 2 and start vibration table 1. Under the action of gravity, powdered sealant 7 will sink evenly into the gap between concrete specimen 3 and mold 2. Turn on electric hydraulic top to press concrete specimen 3 into mold 2 so that concrete specimen 3 and the top of mold 2 are flush. At this time, the powdered sealant 7 in the gap between concrete specimen 3 and mold 2 is compacted. Evenly drip about 40g of water around the surface of the compacted sealant 7 to achieve fast setting and sealing of sealant 7. Then the installation test can begin.

[0029] In summary, this utility model's sealing device features a conical mold that matches a conical concrete specimen. A prong extends between the mold and the concrete specimen to ensure a uniform gap. A funnel guides the flow of fast-setting powdered sealing material into this gap. Under the action of a vibrating table, the powdered sealing material is evenly distributed within the gap. A pressing mechanism presses the concrete specimen down until its top is flush with the top of the mold, simultaneously compacting the sealing material and achieving a sealing effect. This effectively prevents water from seeping between the concrete specimen and the mold, ensuring a tight seal during testing and thus improving testing accuracy and success rate.

[0030] The present invention has been described in detail above with reference to specific embodiments and exemplary examples; however, these descriptions should not be construed as limiting the present invention. Those skilled in the art will understand that various equivalent substitutions, modifications, or improvements can be made to the technical solutions and implementation methods of the present invention without departing from the spirit and scope of the present invention, and all such modifications and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the appended claims.

Claims

1. A sealing device for permeability test of concrete, characterized in that, The device includes a vibration table and a conical mold fixed to the vibration table. The mold is used to place a conical concrete specimen. A pressing mechanism is provided above the concrete specimen. A funnel is provided at the top opening of the mold. Several pins are connected to the bottom of the funnel. The pins extend between the mold and the concrete specimen to control the gap between the concrete specimen and the mold. The gap between the concrete specimen and the mold is used to fill with sealing material.

2. The concrete impermeability test sealing device as described in claim 1, characterized in that, It also includes an electromagnetic base, which is embedded in the vibration table and fixed to the vibration table by bolts.

3. The concrete impermeability test sealing device as described in claim 2, characterized in that, The electromagnetic base is located directly below the mold, and the electromagnetic base is used to attract and fix the mold.

4. The concrete impermeability test sealing device according to claim 1, wherein A sealing ring is fitted at the bottom of the concrete specimen, and the sealing ring is located in the gap between the concrete specimen and the mold.

5. The concrete impermeability test sealing device according to claim 4, wherein The sealing ring has a semi-circular cross-section, with the flat side of the semi-circular ring attached to the concrete specimen and the arc side of the semi-circular ring positioned close to the mold.

6. The concrete impermeability test sealing device according to claim 1, wherein The pins are cylindrical, with a diameter of 2-5mm and a length of 20-50mm.

7. The concrete impermeability test sealing device according to claim 1, wherein The number of pins is 3-5.

8. The concrete impermeability test sealing device according to claim 1, wherein The mold has the same taper as the concrete specimen.

9. The concrete impermeability test sealing device according to claim 1, wherein The inner diameter of the top end of the mold is larger than the inner diameter of the bottom end.

10. The concrete impermeability test sealing device according to claim 1, wherein The pressing mechanism is an electric hydraulic jack.

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