A mortar anti-seepage performance test device and method

Abstract

The present invention belongs to the technical field of anti-seepage performance test, and particularly relates to a mortar anti-seepage performance test device and method, including a test box, a test platform and a truncated cone-shaped test mold, the test mold including a fixed part integrally connected to the test platform and a movable part movably connected to the fixed part, the fixed part being fixed to the movable part by a fixing piece; the upper end of the test platform is provided with six groups of seepage platforms matching the test mold and having seepage grooves on the upper surface, the middle of the seepage groove is connected to a water inlet pipe and a valve through a seepage port, a water blocking mechanism for blocking the seepage port is provided at the center of the axis of the seepage port, a channel is formed between the seepage port and the valve, and a reinforcing mechanism for maintaining sealing during the seepage test is provided on one side of the channel. The test device of the present invention does not require the use of hydraulic equipment to press the test piece and the test mold, and there is no need to tighten a large amount of screws. When in use, the test piece is directly placed in the seepage platform, and then the fixed part and the movable part are fixed.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-seepage performance testing, and in particular relates to a device and method for testing the anti-seepage performance of mortar. Background Art

[0002] The impermeability of mortar is the basic performance of mortar. JGJ / T70-2009 "Standard for Test Methods of Basic Performance of Building Mortar" has clear provisions on how to conduct mortar impermeability test: After the test piece is taken out and the surface is dried, it is sealed with sealing materials and placed in a mortar permeameter for impermeability test. During the impermeability test, the pressure should be increased from 0.2MPa, and then increased to 0.3MPa after 2h of constant pressure, and then increased by 0.1MPa every 1h. When water is found to be seeping out from the periphery of the test piece, the test should be stopped, and the test should be continued after resealing. When 4 of the 6 test pieces have water seepage on the end faces, the test should be stopped and the water pressure at that time should be recorded.

[0003] When placing the traditional mortar into the anti-seepage performance test device for testing, multiple operations need to be performed, such as applying sealing materials on the side of the specimen, inserting the specimen into a mold through hydraulic equipment, etc. In the prior art, the mortar specimen is placed on the seepage platform of the test device after being molded, and then tightened with at least six screws to fix it. The operation is cumbersome and the airtightness of the entire device cannot be guaranteed. Therefore, a mortar anti-seepage performance test device and method are proposed. Summary of the invention

[0004] In order to solve the above problems, the primary purpose of the present invention is to provide a mortar anti-seepage performance testing device and method.

[0005] The above purpose is achieved by the following preparation process:

[0006] A mortar anti-seepage performance test device comprises a test box, a test platform and a truncated cone-shaped test mold, wherein the test mold comprises a fixed part integrally connected to the test platform and a movable part movably connected to the fixed part, wherein the fixed part is fixed to the movable part by a fixing member;

[0007] The upper end of the test platform is provided with six groups of seepage platforms matching the test mold and with seepage grooves on the upper surface. The middle of the seepage groove is connected to the water inlet pipe and the valve through a seepage port. A water blocking mechanism for blocking the seepage port is provided at the center of the axis of the seepage port. A channel is formed between the seepage port and the valve, and a reinforcing mechanism for maintaining sealing during the seepage test is provided on one side of the channel.

[0008] As a further improvement of the above technical solution: a semi-annular insertion groove is provided at the upper end of the test platform along half the circumference of the seepage platform, and a semi-annular baffle is connected to the bottom end of the insertion groove via a first spring.

[0009] As a further improvement of the above technical solution: a vertical semi-annular insertion portion is provided at the bottom end of the movable portion, and the insertion portion matches the insertion groove.

[0010] As a further improvement of the above technical solution: the water blocking mechanism includes a top support member located at the axial center of the seepage port, a sealing plug connected to the lower end of the top support member through a second spring and used to block the channel, and a seepage net located at the lower end of the top support member for connecting the channel and the seepage port.

[0011] As a further improvement of the above technical solution: the reinforcing mechanism includes a through hole located on one side of the channel and a piston member located inside the through hole, one end of the through hole is connected to the channel, and the other end is connected to the lower end of the insertion groove, and a third spring is provided at one end of the piston member close to the insertion groove.

[0012] As a further improvement of the above technical solution: after the insertion portion of the movable portion is placed in the insertion groove, it squeezes the air in the insertion groove so that the piston member squeezes the through hole, thereby lifting the sealing plug.

[0013] As a further improvement of the above technical solution: the opposite surfaces of the fixed part and the movable part are fixedly provided with a silicone layer, the two opening ends of the movable part are provided with convex strips, and the two opening ends of the fixed part are provided with grooves matching the convex strips.

[0014] As a further improvement of the above technical solution: hoop plates are provided on the outer walls of the two open ends of the fixed part and the movable part, a limiting column facing the movable part is provided on the hoop plate of the fixed part, a limiting cylinder facing away from the fixed part and matching the limiting column is provided on the hoop plate of the movable part, and a fourth spring is provided inside the limiting cylinder to resist the limiting column.

[0015] As a further improvement of the above technical solution: six groups of infrared cameras for collecting infrared image data of test pieces in test molds are provided at the upper end of the test platform through a bracket, and each group of the infrared cameras is located directly above each group of test molds. The test box also includes a main control module and a data transmission module. The infrared image data of the test pieces from the infrared camera is transmitted to the main control module and then transmitted to the terminal through the data transmission module.

[0016] The present invention also provides a method for conducting an anti-seepage performance test using the above-mentioned mortar anti-seepage performance test device, comprising the following steps:

[0017] (1) Place the truncated cone-shaped specimen on the seepage table, fit the inner wall of the specimen to the fixed part, fix the movable part and the fixed part with the fixing parts, and move the infrared camera to the top of the specimen;

[0018] (2) Open the valve, increase the water pressure by 0.1 MPa every 8 hours from the water pressure of 0.1 MPa, and fill the seepage tank with water. During the water filling process, use the infrared camera to collect the infrared image of the test piece and transmit it to the main control module for digital conversion, and then transmit it to the computer through the data transmission module;

[0019] (3) The digital infrared image is compared and analyzed by the comparison and analysis detection system on the computer to obtain real-time specimen water seepage data. When the real-time specimen water seepage data exceeds the computer setting value, the computer determines that the specimen is leaking. When 4 out of 6 specimens are leaking, the test is stopped and the computer sends a command to the main control module to control the valve to close. The computer records the water pressure H at that time and calculates the mortar anti-seepage pressure value P according to the following formula:

[0020] P=H-0.1

[0021] The unit of H is MPa.

[0022] The beneficial effects of the present invention are:

[0023] (1) Compared with the traditional test piece molding that requires the application of sealing materials, the present invention provides a silicone layer on the inner wall of the test mold. On the one hand, it can prevent the test piece from seeping into the test mold and affecting the surface of the test mold. On the other hand, it has an excellent sealing effect on the movable part, the fixed part and the water seepage platform as a whole. At the same time, it also facilitates the demolding of the test piece from the test mold.

[0024] (2) Compared with the traditional test piece molding, it is simpler and more convenient. After the traditional time curing molding, a layer of sealing material must first be applied to the side wall, and then placed in the test mold, and then the test piece and the test mold are pressed by hydraulic equipment, and the whole is aligned with at least six groups of studs on the test platform of the test device and placed above the seepage table, and then the screws are tightened respectively. The test device of the present invention does not need to use hydraulic equipment to press the test piece and the test mold, and there is no need to tighten a large amount of screws. When in use, the test piece is directly placed in the seepage table, and then the fixed part and the movable part are fixed.

[0025] (3) In the present invention, during the installation of the movable part, when the valve is closed, the insertion part gradually squeezes the insertion groove. Due to the obstruction of the test piece above, if the air tightness is good, the water blocking mechanism is lifted. When the movable part is installed, the insertion part cannot be further inserted, which indicates that the air tightness is still excellent. The sealing performance of the test device is tested at the beginning to avoid water seepage during the test, which requires re-preparation of the test piece and the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a front view of the mortar anti-seepage performance testing device of the present invention;

[0027] Figure 2is a top view of a mortar anti-seepage performance testing device according to the present invention;

[0028] Figure 3 It is a schematic diagram of the test mold and the bottom structure of the mortar anti-seepage performance test device of the present invention;

[0029] Figure 4 It is a schematic diagram of the test mold combination and unfolding structure of the mortar anti-seepage performance test device of the present invention;

[0030] Figure 5 It is a local internal structure diagram of the test mold joint of the mortar anti-seepage performance test device of the present invention;

[0031] Figure 6 It is a schematic diagram of the fixing structure of the mortar anti-seepage performance testing device of the present invention.

[0032] Illustration: 1. Test box; 2. Test platform; 3. Test mold; 4. Infrared camera; 5. Bracket; 6. Fixed part; 7. Movable part; 8. Seepage platform; 9. Insertion part; 10. First spring; 11. Baffle; 12. Insertion groove; 13. Seepage groove; 14. Seepage port; 15. Seepage net; 16. Second spring; 17. Top support; 18. Sealing plug; 19. Channel; 20. Water inlet pipe; 21. Valve; 22. Through hole; 23. Piston; 24. Third spring; 25. Silicone layer; 26. Raised strip; 27. Hoop plate; 28. Limit column; 29. ​​Limit cylinder; 30. Fourth spring; 31. Groove. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0034] like Figure 1-3As shown, the mortar anti-seepage performance test device of this embodiment includes a test box 1, a test platform 2 and a truncated cone-shaped test mold 3. The test mold 3 includes a fixed part 6 integrally connected to the test platform 2 and a movable part 7 movably connected to the fixed part 6. The upper end of the test platform 2 is provided with six groups of seepage platforms 8 matching the test mold 3 and having seepage grooves 13 on the upper surface. The middle of the seepage groove 13 is connected to the water inlet pipe 20 and the valve 21 through a seepage port 14. The bottom end of the movable part 7 is provided with a vertical semi-annular insertion part 9. The upper end of the test platform 2 is provided with a semi-annular insertion groove 12 along half the circumference of the seepage platform 8. The bottom end of the insertion groove 12 is connected with a semi-annular baffle 11 through a first spring 10. The insertion part 9 and the insertion groove 12 match each other. The bottom end insertion part 9 of the movable part 7 is placed in the insertion groove 12 to squeeze the baffle 11 downward, and then the fixed part 6 is fixed to the movable part 7 through a fixing member.

[0035] After the specimen is cured, it is directly placed on the seepage table 8, with the specimen and the seepage groove 13 located on the same axis. The movable part 7 is then inserted into the insertion groove 12 until it is completely fixed. After the seal is detected, the valve 21 is opened, and the water in the water tank of the test box 1 is pressurized and then seeps out from the seepage port 14 through the water inlet pipe 20 and seeps into the seepage groove 13 at the upper end of the seepage table 8, and the seepage test of the specimen is started.

[0036] like Figure 4-5 As shown, the opposite surfaces of the fixed part 6 and the movable part 7 are fixedly provided with a silicone layer 25, and the two open ends of the movable part 7 are provided with convex strips 26. The two open ends of the fixed part 6 are provided with grooves 31 matching the convex strips 26. When the fixed part 6 and the movable part 7 are fixed, the convex strips 26 are stuck in the grooves 31, which can not only fix but also seal. Under the action of the silicone layer 25, the fixed part 6 and the movable part 7 are tightly fitted, and the bottom end of the movable part 7 is fitted with the outer wall of the water seepage platform 8, which can achieve an excellent sealing effect and prevent the test piece from seeping water and affecting the surface of the test mold 3. At the same time, it is also convenient for the test piece to be demolded from the test mold when the test is finished.

[0037] Hoop plates 27 are provided on the outer walls of the two open ends of the fixed part 6 and the movable part 7. The hoop plates 27 of the fixed part 6 are provided with limiting posts 28 facing the movable part 7. The hoop plates 27 of the movable part 7 are provided with limiting cylinders 29 facing away from the fixed part 6 and matching the limiting posts 28. The interior of the limiting cylinder 29 is provided with a fourth spring 30 that abuts against the limiting posts 28. When the fixed part 6 and the movable part 7 are fixed, the limiting posts 28 of the fixed part 6 enter the interior of the limiting cylinder 29 of the movable part 7 and slowly squeeze the fourth spring 30, which is convenient for positioning the fixed part 6 and the movable part 7 on the one hand and increases the connection stability between the two on the other hand. At the same time, when demoulding, when the telescopic device 13 removes the squeezing force, due to the elastic force of the fourth spring 30, the movable part 7 automatically bounces off the fixed part 6, which is convenient for demoulding. There is no need to take down the test piece and the test mold 3 as a whole, and the hydraulic device is used for demoulding again.

[0038] The structure of the fixing parts is as follows Figure 6 As shown, it is composed of a right-angle bending plate, a movable plate, two groups of support plates and a knob. The horizontal end of the bending plate and the opposite movable plate are provided with slots matching the limiting cylinder 29, so that the bending plate and the movable plate can be directly inserted into the position of the hoop plate 27 of the combined fixed part 6 and the movable part 7. When fixing, the movable plate is located on the hoop plate 27 of the movable part 7, and the bending plate is located on the bending plate of the fixed part 6. Then, tighten the knob to make the movable plate approach the fixed plate and squeeze it to fix it. The knob can be tightened directly by hand.

[0039] A water blocking mechanism for blocking the water seepage port 14 is provided at the center of the axis of the water seepage port 14, and the water blocking mechanism includes a top support member 17 located at the center of the axis of the water seepage port 14, a sealing plug 18 connected to the lower end of the top support member 17 through a second spring 16 and used to block the channel 19, and a water seepage net 15 located at the lower end of the top support member 17 and used to connect the channel 19 and the water seepage port 14. A channel 19 is formed between the water seepage port 14 and the valve 21. When the valve 21 is opened and water enters the channel 19, the water pressure lifts the sealing plug 18 to the top support member 17, and water enters the water seepage port 14 from the water seepage net 15. When the valve 21 is closed, the sealing plug 18 falls down to block the channel 19.

[0040] A reinforcing mechanism for maintaining sealing during the water seepage test is provided on one side of the channel 19, and the reinforcing mechanism includes a through hole 22 located on one side of the channel 19, and a piston member 23 located inside the through hole 22. One end of the through hole 22 is connected to the channel 19, and the other end is connected to the lower end of the insertion groove 12. A third spring 24 is provided on the end of the piston member 23 close to the insertion groove 12. After the insertion portion 9 of the movable portion 7 is placed in the insertion groove 12, the air in the insertion groove 12 is squeezed so that the piston member 23 squeezes the through hole 22, thereby lifting the sealing plug 18. When the test piece is placed on the water seepage platform 8, a quasi-sealed space is formed. At this time, the valve The door 21 is in a closed state, and the movable part 7 is inserted. The insertion part 9 of the movable part 7 squeezes the baffle 11. At the same time, due to the continuous descent of the baffle 11, the air in the insertion groove 12 is squeezed into the inside of the through hole 22, and the sealing plug 18 is slowly lifted up. If the airtightness is good, there will be no increase in resistance during the downward pressing of the movable part 7. After the fixed part 6 and the movable part 7 are fixed and the movable part 7 is installed, but the insertion part 9 can no longer be pressed down, it means that the airtightness is still excellent. Therefore, the sealing test can be accurately carried out before the test to avoid water seepage during the test.

[0041] The upper end of the test platform 2 is provided with six groups of infrared cameras 4 for collecting infrared image data of test pieces in the test molds 3 through the bracket 5. Each group of infrared cameras 4 is located directly above each group of test molds 3. The test box 1 also includes a main control module and a data transmission module. The infrared image data of the test pieces from the infrared cameras 4 is transmitted to the main control module and then transmitted to the terminal through the data transmission module.

[0042] The method for conducting an anti-seepage performance test using the above-mentioned mortar anti-seepage performance test device in this embodiment comprises the following steps:

[0043] (1) Place the truncated cone-shaped specimen on the water seepage platform 8, with the inner wall of the specimen in contact with the fixed portion 6, then fix the movable portion 7 and the fixed portion 6 with a fixing member, and move the infrared camera 4 to the top of the specimen;

[0044] (3) Open valve 21, increase the water pressure by 0.1 MPa every 8 hours from the water pressure of 0.1 MPa, and inject water into the seepage tank 13. During the injection, the infrared camera 4 is used to collect infrared images of the test piece and transmit them to the main control module for digital conversion, and then transmit them to the computer through the data transmission module;

[0045] (3) The digital infrared image is compared and analyzed by the comparison and analysis detection system on the computer to obtain real-time test piece water seepage data. When the real-time test piece water seepage data exceeds the computer setting value, the computer determines that the test piece is leaking. When 4 out of 6 test pieces are leaking, the test is stopped, and the computer sends a command to the main control module to control the valve 21 to close. The computer records the water pressure H at that time and calculates the mortar anti-seepage pressure value P according to the following formula:

[0046] P=H-0.1

[0047] Wherein, the unit of H is MPa.

[0048] The above-mentioned embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A mortar anti-permeability test device, comprising a test box (1), a test platform (2) and a truncated cone-shaped test mold (3), characterized in that: The test mold (3) comprises a fixed part (6) integrally connected to the test platform (2) and a movable part (7) movably connected to the fixed part (6), wherein the fixed part (6) is fixed to the movable part (7) via a fixing member; The upper end of the test platform (2) is provided with six groups of water seepage platforms (8) matching the test mold (3) and having water seepage grooves (13) on the upper surface. The middle of the water seepage groove (13) is connected to the water inlet pipe (20) and the valve (21) through a water seepage port (14). The center of the axis of the water seepage port (14) is provided with a water blocking mechanism for blocking the water seepage port (14). A channel (19) is formed between the water seepage port (14) and the valve (21). A reinforcing mechanism for maintaining sealing during the water seepage test is provided on one side of the channel (19); A semi-annular insertion groove (12) is provided at the upper end of the test platform (2) along half the circumference of the water seepage platform (8), and a semi-annular baffle (11) is connected to the bottom end of the insertion groove (12) via a first spring (10); A vertical semi-annular insertion portion (9) is provided at the bottom end of the movable portion (7), and the insertion portion (9) and the insertion groove (12) match each other; The water blocking mechanism comprises a top support member (17) located at the axial center of the water seepage port (14), a sealing plug (18) connected to the lower end of the top support member (17) via a second spring (16) and used to block the channel (19), and a water seepage net (15) located at the lower end of the top support member (17) and used to connect the channel (19) and the water seepage port (14); The reinforcing mechanism comprises a through hole (22) located on one side of the channel (19) and a piston member (23) located inside the through hole (22); one end of the through hole (22) is in communication with the channel (19), and the other end is in communication with the lower end of the insertion groove (12); a third spring (24) is provided at one end of the piston member (23) close to the insertion groove (12); After the insertion portion (9) of the movable portion (7) is placed in the insertion groove (12), the air in the insertion groove (12) is squeezed so that the piston member (23) squeezes the through hole (22), thereby causing the sealing plug (18) to be lifted.

2. The mortar anti-seepage performance testing device according to claim 1, characterized in that: The opposite surfaces of the fixed portion (6) and the movable portion (7) are both fixedly provided with a silicone layer (25), the two open ends of the movable portion (7) are both provided with convex strips (26), and the two open ends of the fixed portion (6) are provided with grooves (31) matching the convex strips (26).

3. The mortar anti-seepage performance testing device according to claim 1, characterized in that: Hoop plates (27) are provided on the outer walls of both open ends of the fixed portion (6) and the movable portion (7); a limiting column (28) facing the movable portion (7) is provided on the hoop plate (27) of the fixed portion (6); a limiting cylinder (29) facing away from the fixed portion (6) and matching the limiting column (28) is provided on the hoop plate (27) of the movable portion (7); a fourth spring (30) abutting against the limiting column (28) is provided inside the limiting cylinder (29).

4. The mortar anti-seepage performance testing device according to claim 1, characterized in that: The upper end of the test platform (2) is provided with six groups of infrared cameras (4) for collecting infrared image data of test pieces in the test molds (3) via a bracket (5), and each group of the infrared cameras (4) is located directly above each group of test molds (3). The test box (1) also includes a main control module and a data transmission module. The infrared image data of the test pieces from the infrared cameras (4) is transmitted to the main control module and then transmitted to the terminal via the data transmission module.

5. A method for conducting an anti-seepage performance test using the mortar anti-seepage performance test device according to claim 4, characterized in that: The following steps are involved: (1) placing a truncated cone-shaped test piece on a water seepage table (8), with the inner wall of the test piece in contact with the fixed part (6), then fixing the movable part (7) and the fixed part (6) by a fixing member, and moving the infrared camera (4) to the top of the test piece; (2) opening the valve (21), increasing the water pressure by 0.1 MPa every 8 hours from a water pressure of 0.1 MPa, and injecting water into the seepage tank (13). During the injection of water, the infrared camera (4) is used to collect infrared images of the test piece and transmit them to the main control module for digital conversion, and then transmit them to the computer through the data transmission module; (3) The digital infrared image is compared and analyzed by the comparison and analysis detection system on the computer to obtain real-time test piece water seepage data. When the real-time test piece water seepage data exceeds the computer setting value, the computer determines that the test piece is leaking. When 4 out of 6 test pieces are leaking, the test is stopped and the computer sends a command to the main control module to control the valve (21) to close. The computer records the water pressure H at that time and calculates the mortar anti-seepage pressure value P according to the following formula: P=H-0.1 Wherein, the unit of H is MPa.

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