A sealing material for testing the impermeability pressure of mortar and its preparation and application method

Abstract

This invention discloses a sealing material for testing the impermeability pressure of mortar, and its preparation and application methods, relating to the field of building material performance testing technology. It comprises the following components by mass ratio: 10-15 parts waste tire particles, 30-50 parts manufactured sand, 15-30 parts stone powder, 20-30 parts industrial grease, and 1-3 parts organic fiber. The industrial grease in the sealing material of this invention provides waterproofing; the waste tire particles, manufactured sand, and stone powder are of varying coarse and fine textures; and the waste tire particles and organic fiber provide toughening and coating effects. The combination of these five components effectively solves the problems of existing sealing materials for testing the impermeability pressure of mortar, such as poor sealing performance failing to meet the sealing requirements of high impermeability pressure mortar product testing, cumbersome use and preparation methods, difficulty in cleaning after testing, inability to be reused, and lack of long-term storage. The sealing material has advantages such as reusability and long-term storage, simple operation, low cost, and easy cleaning after testing.

Description

Technical Field

[0001] This invention relates to the field of building material performance testing technology, and more specifically to the field of sealing materials for mortar anti-permeability pressure testing and their preparation and application methods. Background Technology

[0002] Various mortar products are widely used in factories, residences, warehouses, and other buildings to address the problem of water seepage through cracks. Water resistance, as an important testing item, is widely used in the routine testing of building waterproofing materials, such as dry-mixed ordinary waterproof mortar, wet-mixed ordinary waterproof mortar, polymer mortar, and inorganic waterproofing and sealing materials. Under high water resistance pressure, the water resistance pressure test of waterproof mortar often results in insufficient sealing between the mortar specimen and the water resistance test mold, seriously affecting the accuracy of the test. Currently, mortar product and method standards such as JGJ / T 70-2009, JC / T 984-2011, GB / T23440-2009, and JC / T 474-2008 do not specify which sealing material should be used. This makes the sealing problem between the mortar specimen and the water resistance test mold in mortar water resistance pressure testing a technical challenge faced by the building materials testing industry. Sealing materials used in actual mortar water resistance tests include paraffin wax, cement processing grease, and rubber sleeves. These conventional sealing materials have poor sealing performance and the following disadvantages:

[0003] The following are the drawbacks of using paraffin wax for sealing: 1) Heating paraffin wax produces irritating and toxic gases, which can cause harm to operators; 2) The preheating temperature of the mold is difficult to control. Either the temperature is too high, causing the paraffin wax to melt and leak out, or the temperature is too low, resulting in insufficient melting of the paraffin wax. Cooled paraffin wax is brittle, and the pressure of the specimen entering the mold can cause the paraffin wax to fall off and crack. At the same time, it cannot adhere to the inner wall of the mold for the impermeability test, thus losing its sealing effect; 3) Generally, there are many impermeability test specimens, and the operation of preheating the mold is not very good, resulting in low efficiency.

[0004] Regarding cement processing grease as a sealing material, this sealing material has the advantages of being easy to operate and easy to clean after the experiment, but it also has the following problems: 1) When the water pressure is high, cement processing grease is easily squeezed out from the edge, causing water seepage at the edge, thus failing to achieve the sealing effect; 2) Cement processing grease is not easy to store under normal conditions and is prone to hydration reaction with moisture in the air.

[0005] Regarding rubber sleeve sealing materials, the following problems exist: 1) The dimensional requirements for the specimen and the anti-permeability test mold are extremely strict. Even a slight deviation can cause the specimen to break. In addition, after the rubber sleeve covers the specimen, it is squeezed into the anti-permeability test mold by external force. If the surface of the specimen and the inner wall of the anti-permeability test mold are not smooth enough, the rubber sleeve is very easy to break, thus failing to achieve the sealing effect; 2) Currently, the price of rubber sleeves on the market is 5-8 yuan per piece; the cost of rubber sleeves required for a set of specimens is 30-48 yuan, which is relatively high and wasteful of resources; 3) Because the sealing effect is achieved purely by squeezing and compressing the rubber sleeve by external force, the specimen and the anti-permeability test mold are squeezed very tightly, making demolding difficult.

[0006] In addition, patent technology with publication number CN201910406083, entitled "A sealing material for concrete and mortar impermeability test", discloses modified asphalt and its preparation method and application, and provides a sealing material for concrete and mortar impermeability test; patent technology with publication number CN202011625366, entitled "A sealing material for fly ash manufactured sand mortar impermeability test", discloses a sealing material for fly ash manufactured sand mortar impermeability test.

[0007] Although the mortar anti-seepage sealing materials disclosed in the above patented technologies have a certain sealing effect, they cannot meet the sealing requirements of high anti-seepage pressure mortar product testing experiments. They also have problems such as the need for the adhesive to cure, which affects the timeliness of the experiment, the preparation and use methods are complicated and difficult to operate, cleaning is difficult after the experiment, they cannot be reused, and the cost is high. Therefore, they are not usable in actual experiments. Summary of the Invention

[0008] The purpose of this invention is to address the technical problems of existing mortar anti-seepage sealing materials, such as poor sealing effect, complex and difficult operation, difficult cleaning after the experiment, inability to be reused, and high cost. This invention provides a sealing material for testing the anti-seepage pressure of mortar, along with its preparation and application method. It is a mortar experimental sealing material with good sealing effect, meeting the sealing requirements of high anti-seepage pressure mortar product testing experiments, easy to clean after the experiment, simple to use, reusable, and capable of long-term storage.

[0009] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0010] This invention provides a sealing material for testing the impermeability pressure of mortar, comprising the following components in the following mass ratio: 10-15 parts waste tire particles, 30-50 parts manufactured sand, 15-30 parts stone powder, 20-30 parts industrial grease, and 1-3 parts organic fiber.

[0011] Furthermore, the sealing material comprises the following components in the following mass ratios: 15 parts waste tire pellets, 45 parts manufactured sand, 18 parts stone powder, 21 parts industrial grease, and 1 part organic fiber.

[0012] Furthermore, the sealing material comprises the following components in the following mass ratios: 10 parts waste tire pellets, 30 parts manufactured sand, 15 parts stone powder, 20 parts industrial grease, and 1 part organic fiber.

[0013] Furthermore, the sealing material comprises the following components in the following mass ratios: 15 parts waste tire pellets, 50 parts manufactured sand, 30 parts stone powder, 30 parts industrial grease, and 3 parts organic fiber.

[0014] Furthermore, the particle size distribution of the manufactured sand is between 0.075 mm and 0.6 mm, and the fineness modulus of the manufactured sand is between 1.2 and 1.8.

[0015] Furthermore, the particle size of the waste tire particles is distributed between 0.3 mm and 0.6 mm.

[0016] Further, the stone powder is one or more of basalt stone powder, granite stone powder, or limestone stone powder, preferably basalt stone powder; the particle size of the stone powder is ≤0.075mm, and the specific surface area of ​​the stone powder is ≤300m². 2 / kg~500m 2 Between / kg.

[0017] Furthermore, the organic fiber is one of polyethylene fiber, polypropylene fiber, polyacrylonitrile fiber, aramid fiber or polyvinyl alcohol fiber, the length of the organic fiber is not greater than 25 mm and not less than 10 mm, and the aspect ratio of the organic fiber is between 30:1 and 50:1.

[0018] This invention also provides a method for preparing and using a sealing material for testing the impermeability pressure of mortar, which, using the above-mentioned sealing material for testing the impermeability pressure of mortar, includes the following steps:

[0019] S1. Preparation of raw materials: Weigh the following components by mass: 10-15 parts waste tire pellets, 30-50 parts manufactured sand, 15-30 parts stone powder, 20-30 parts industrial butter and 1-3 parts organic fiber.

[0020] S2. Preparation of sealing material: First, mix the waste tire particles, manufactured sand, stone powder and organic fiber prepared in step S1 evenly to obtain a dry mixture. Then, add industrial grease to the dry mixture and stir until uniform to obtain the sealing material.

[0021] S3. Use of sealing material: Apply the sealing material obtained in step S2 evenly to the surface of the mortar specimen to be tested and the inside of the anti-permeability test mold. Place the mortar specimen to be tested into the anti-permeability test mold for the anti-permeability test.

[0022] S4. Recycling of sealing material: After the impermeability test, scrape the sealing material on the surface of the mortar specimen and the inside of the impermeability test mold into a sealed container containing desiccant. After the desiccant has completely absorbed the moisture brought in during the impermeability test, stir the sealing material evenly to achieve recycling of the sealing material.

[0023] Further, in step S3, the thickness of the pressed coating is 0.6mm to 0.8mm. The mortar specimen to be tested is placed into the anti-permeability test mold and pressure is applied to press it compact. The sealant overflowing from the upper and lower edges of the mortar specimen to be tested during the pressing and compaction process is scraped clean before the anti-permeability test is carried out.

[0024] The beneficial effects of this invention are as follows:

[0025] 1. The waste tire particles, manufactured sand, stone powder and organic fibers in the sealing material of this invention will not react with water, and the industrial grease has a waterproof effect and forms an oil film on the surface of each component, so that the sealing material as a whole has good waterproof and seepage-proof performance, and can be reused and stored for a long time.

[0026] 2. The adhesive effect of industrial grease and the anti-settling and stratification effect of organic fibers in the sealing material of this invention make the components adhere together, and the sealing material as a whole has good homogeneity; the coarse and fine mixture of manufactured sand, stone powder and waste tire particles has a mutual filling effect; organic fibers and waste tire particles have a toughening effect and inhibit microcracks; under osmotic pressure, manufactured sand, stone powder, waste tire particles and organic fibers interlock with each other, and organic fibers and waste tire particles can produce a certain deformation, which has a coating effect, improving the overall density and sealing performance; the combination of the five raw materials can produce a sealing material with excellent sealing ability.

[0027] 3. The sealing material showed no side leakage throughout the entire process of raising the anti-seepage pressure to 2.0MPa and maintaining the pressure for 2 hours, fully meeting and exceeding the sealing requirements of the standard for mortar anti-seepage test. It effectively solves the problems of existing mortar anti-seepage sealing materials, such as poor sealing effect, inability to meet the sealing requirements of high anti-seepage pressure mortar product testing, cumbersome preparation and use methods, difficulty in cleaning after the test, and inability to be stored for a long time. It has the advantages of being reusable and long-term storage, simple operation, low cost, and easy to clean after the test. Attached Figure Description

[0028] Figure 1 This is a process flow diagram of the preparation and use of a sealing material for testing the impermeability pressure of mortar according to the present invention. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0032] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0033] Example 1

[0034] like Figure 1 This invention provides a sealing material for testing the impermeability pressure of mortar. The sealing material comprises the following components in the following mass ratio: 15 parts waste tire particles, 45 parts manufactured sand, 18 parts stone powder, 21 parts industrial grease, and 1 part organic fiber.

[0035] The waste tire pellets are produced by mechanically crushing and screening waste tires, with a particle size distribution between 0.3 mm and 0.6 mm; the manufactured sand has a particle size distribution between 0.075 mm and 0.6 mm, and a fineness modulus of 1.6; the stone powder is basalt stone powder with a particle size ≤ 0.075 mm and a specific surface area of ​​353 m². 2 / kg; the organic fiber is polyethylene fiber, with a fiber length of not more than 25mm and not less than 10mm, and an aspect ratio between 30:1 and 50:1.

[0036] The preparation and application method of this sealing material includes the following steps:

[0037] S1. Preparation of raw materials: Weigh the following components by mass: 15 parts waste tire pellets, 45 parts machine sand, 18 parts stone powder, 21 parts industrial grease and 1 part organic fiber.

[0038] S2. Preparation of sealing material: First, mix the waste tire particles, manufactured sand, stone powder and organic fiber prepared in step S1 evenly to obtain a dry mixture. Then, add industrial grease to the dry mixture and stir until uniform to obtain the sealing material.

[0039] S3. Application of sealing material: Apply the sealing material obtained in step S2 evenly to the surface of the mortar specimen to be tested and the inside of the anti-permeability test mold. The thickness of the application should be 0.6mm to 0.8mm. Place the mortar specimen to be tested into the anti-permeability test mold and apply pressure to press it down. Scrape off any excess sealing material that overflows from the top and bottom edges of the mortar specimen during the pressing process before conducting the anti-permeability test.

[0040] S4. Recycling of sealing material: After the impermeability test, scrape the sealing material on the surface of the mortar specimen and the inside of the impermeability test mold into a sealed container containing desiccant. After the desiccant has completely absorbed the moisture brought in during the impermeability test, stir the sealing material evenly to achieve recycling of the sealing material.

[0041] Example 2

[0042] like Figure 1 This invention provides a sealing material for testing the impermeability pressure of mortar. The sealing material comprises the following components in the following mass ratio: 10 parts waste tire particles, 30 parts manufactured sand, 15 parts stone powder, 20 parts industrial grease, and 1 part organic fiber.

[0043] The waste tire pellets are produced by mechanically crushing and screening waste tires, with a particle size distribution between 0.3 mm and 0.6 mm; the manufactured sand has a particle size distribution between 0.075 mm and 0.6 mm, and a fineness modulus of 1.6; the stone powder is limestone powder with a particle size ≤ 0.075 mm and a specific surface area of ​​452 m². 2 / kg; the organic fiber is polypropylene fiber, with a fiber length of not more than 25mm and not less than 10mm, and an aspect ratio between 30:1 and 50:1.

[0044] The preparation and application method of this sealing material includes the following steps:

[0045] S1. Preparation of raw materials: Weigh the following components by mass: 10 parts waste tire pellets, 30 parts machine sand, 15 parts stone powder, 20 parts industrial grease and 1 part organic fiber.

[0046] S2. Preparation of sealing material: First, mix the waste tire particles, manufactured sand, stone powder and organic fiber prepared in step S1 evenly to obtain a dry mixture. Then, add industrial grease to the dry mixture and stir until uniform to obtain the sealing material.

[0047] S3. Application of sealing material: Apply the sealing material obtained in step S2 evenly to the surface of the mortar specimen to be tested and the inside of the anti-permeability test mold. The thickness of the application should be 0.6mm to 0.8mm. Place the mortar specimen to be tested into the anti-permeability test mold and apply pressure to press it down. Scrape off any excess sealing material that overflows from the top and bottom edges of the mortar specimen during the pressing process before conducting the anti-permeability test.

[0048] S4. Recycling of sealing material: After the impermeability test, scrape the sealing material on the surface of the mortar specimen and the inside of the impermeability test mold into a sealed container containing desiccant. After the desiccant has completely absorbed the moisture brought in during the impermeability test, stir the sealing material evenly to achieve recycling of the sealing material.

[0049] Example 3

[0050] like Figure 1 This invention provides a sealing material for testing the impermeability pressure of mortar. The sealing material comprises the following components in the following mass ratio: 15 parts waste tire particles, 50 parts manufactured sand, 30 parts stone powder, 30 parts industrial grease, and 3 parts organic fiber.

[0051] The waste tire pellets are produced by mechanically crushing and screening waste tires, with a particle size distribution between 0.3 mm and 0.6 mm; the manufactured sand has a particle size distribution between 0.075 mm and 0.6 mm, and a fineness modulus of 1.6; the stone powder is granite powder with a particle size ≤ 0.075 mm and a specific surface area of ​​398 m². 2 / kg; the organic fiber is polyacrylonitrile fiber, with a fiber length of not more than 25mm and not less than 10mm, and an aspect ratio between 30:1 and 50:1.

[0052] The preparation and application method of this sealing material includes the following steps:

[0053] S1. Preparation of raw materials: Weigh the following components by mass: 15 parts waste tire pellets, 50 parts machine sand, 30 parts stone powder, 30 parts industrial grease and 3 parts organic fiber.

[0054] S2. Preparation of sealing material: First, mix the waste tire particles, manufactured sand, stone powder and organic fiber prepared in step S1 evenly to obtain a dry mixture. Then, add industrial grease to the dry mixture and stir until uniform to obtain the sealing material.

[0055] S3. Application of sealing material: Apply the sealing material obtained in step S2 evenly to the surface of the mortar specimen to be tested and the inside of the anti-permeability test mold. The thickness of the application should be 0.6mm to 0.8mm. Place the mortar specimen to be tested into the anti-permeability test mold and apply pressure to press it down. Scrape off any excess sealing material that overflows from the top and bottom edges of the mortar specimen during the pressing process before conducting the anti-permeability test.

[0056] S4. Recycling of sealing material: After the impermeability test, scrape the sealing material on the surface of the mortar specimen and the inside of the impermeability test mold into a sealed container containing desiccant. After the desiccant has completely absorbed the moisture brought in during the impermeability test, stir the sealing material evenly to achieve recycling of the sealing material.

[0057] Comparative Example 1

[0058] The sealing material is paraffin wax.

[0059] Comparative Example 2

[0060] The sealing material is cement processing grease, with a cement:industrial grease (mass ratio) of 75:25.

[0061] Comparative Example 3

[0062] The sealing material is composed of stone powder and industrial grease, with a mass ratio of stone powder to industrial grease of 75:25.

[0063] Comparative Example 4

[0064] The sealing material consists of manufactured sand, stone powder, and industrial grease, in a mass ratio of manufactured sand:stone powder:industrial grease.

[0065] =54:21:25.

[0066] The manufactured sand has a particle size distribution between 0.075 mm and 0.6 mm, with a fineness modulus of 1.6; the stone powder is basalt stone powder with a particle size ≤ 0.075 mm and a specific surface area of ​​353 m². 2 / kg;

[0067] The sealing effects in the impermeability test are compared as follows:

[0068] Experiments revealed that when the sealing materials prepared in Examples 1-3 were used for testing the impermeability pressure of mortar, and the impermeability pressure was increased to 1.5 MPa and stabilized for 2 hours according to the standard requirements, no side leakage was observed in any of the six specimens in each group. After increasing the impermeability pressure to 1.5 MPa and stabilizing for 2 hours, the pressure was further increased to 2.0 MPa and stabilized for 2 hours, and no side leakage was observed in any of the six specimens in each group. This indicates that the sealing materials in Examples 1-3 meet and exceed the standard requirements, achieving a 100% sealing success rate, and possess advantages such as simple operation, low cost, and easy cleaning after the experiment. In Comparative Example 1, paraffin wax was used as the sealing material. When the impermeability pressure was increased to 0.6 MPa according to the standard requirements, side leakage occurred at the edges of the paraffin wax in all six mortar specimens, indicating that the paraffin wax seal did not meet the standard requirements. In Comparative Example 2, cement and industrial grease were used as sealing materials. When the impermeability pressure was increased to 1.0 MPa according to the standard requirements, the sealing material was squeezed out at the edges of all six mortar specimens, resulting in water seepage, indicating that the cement and industrial grease seal did not meet the standard requirements. Comparative Example 3 used stone powder and industrial grease as sealing materials. When the impermeability pressure was raised to 1.0 MPa according to the standard requirements, the sealing material was squeezed out in 4 out of 6 mortar specimens, resulting in water seepage. This indicates that the combination of stone powder and industrial grease does not meet the standard requirements. Since stone powder has the advantage of not undergoing a hydration reaction when exposed to moisture in the air compared to cement, Comparative Example 3 has the advantage of long-term preservation compared to Comparative Example 2, and can be stored indoors for more than one year. Comparative Example 4 used manufactured sand, stone powder, and industrial grease as sealing materials. When the impermeability pressure was raised to 1.2 MPa according to the standard requirements, the sealing material was squeezed out at the edges in 3 out of 6 mortar specimens, resulting in water seepage. This indicates that the combination of stone powder, manufactured sand, and industrial grease does not meet the standard requirements.

[0069] The effects of repeated use are as follows:

[0070] In Examples 1-3, after the impermeability test, the sealing material on the surface of the mortar specimens and the inside of the impermeability test mold was scraped into a sealed container containing a desiccant. After the desiccant completely absorbed the moisture brought in during the impermeability test, the sealing material was stirred evenly to complete the recycling of the sealing material. Impermeability tests were conducted using the sealing material recycled in Examples 1-3. The results showed that when the sealing material recycled in Examples 1-3 was used as the sealing material for testing the impermeability pressure of mortar, and the impermeability pressure was increased to 1.5 MPa according to the standard requirements and stabilized for 2 hours, no side leakage was observed in any of the 6 specimens in each group. After increasing the impermeability pressure to 1.5 MPa and stabilizing for 2 hours, the pressure was further increased to 2.0 MPa and stabilized for 2 hours, and no side leakage was observed in any of the 6 specimens in each group. The results indicate that the sealing materials prepared in Examples 1-3 can be reused.

[0071] Table 1 shows the composition and mass ratio of the sealing materials in Examples 1-3.

[0072] raw material components Example 1 Example 2 Example 3 Waste tire pellets 15 12 10 Manufactured sand 45 42 38 stone powder 18 21 23 organic fiber 1 2 3 Industrial butter 21 23 26

Claims

1. A sealing material for testing the impermeability pressure of mortar, characterized in that, It includes the following components in the following mass ratio: 10-15 parts waste tire pellets, 30-50 parts manufactured sand, 15-30 parts stone powder, 20-30 parts industrial grease, and 1-3 parts organic fiber; The particle size distribution of the manufactured sand is between 0.075 mm and 0.6 mm, and the fineness modulus of the manufactured sand is between 1.2 and 1.

8. The particle size of the waste tire particles is distributed between 0.3 mm and 0.6 mm; The stone powder is one or more of basalt stone powder, granite stone powder, or limestone stone powder, the particle size of the stone powder is ≤0.075mm, and the specific surface area of ​​the stone powder is ≥300m². 2 / kg~500m 2 Between / kg.

2. The sealing material for testing the impermeability pressure of mortar according to claim 1, characterized in that, The sealing material comprises the following components in the following mass ratios: 15 parts waste tire pellets, 45 parts manufactured sand, 18 parts stone powder, 21 parts industrial grease, and 1 part organic fiber.

3. The sealing material for testing the impermeability pressure of mortar according to claim 1, characterized in that, The sealing material comprises the following components in the following mass ratios: 10 parts waste tire pellets, 30 parts manufactured sand, 15 parts stone powder, 20 parts industrial grease, and 1 part organic fiber.

4. The sealing material for testing the impermeability pressure of mortar according to claim 1, characterized in that, The sealing material comprises the following components in the following mass ratios: 15 parts waste tire pellets, 50 parts manufactured sand, 30 parts stone powder, 30 parts industrial grease, and 3 parts organic fiber.

5. The sealing material for testing the impermeability pressure of mortar according to claim 1, characterized in that, The organic fiber is one of polyethylene fiber, polypropylene fiber, polyacrylonitrile fiber, aramid fiber or polyvinyl alcohol fiber, the length of the organic fiber is not greater than 25 mm and not less than 10 mm, and the aspect ratio of the organic fiber is between 30:1 and 50:

1.

6. A method for preparing and using a sealing material for testing the impermeability pressure of mortar, comprising the sealing material for testing the impermeability pressure of mortar as described in any one of claims 1 to 5, characterized in that, Includes the following steps: S1. Preparation of raw materials: Weigh the following components by mass: 10-15 parts waste tire pellets, 30-50 parts manufactured sand, 15-30 parts stone powder, 20-30 parts industrial grease and 1-3 parts organic fiber. S2. Preparation of sealing material: First, mix the waste tire particles, manufactured sand, stone powder and organic fiber prepared in step S1 evenly to obtain a dry mixture. Then, add industrial grease to the dry mixture and stir until uniform to obtain the sealing material. S3. Use of sealing material: Apply the sealing material obtained in step S2 evenly to the surface of the mortar specimen to be tested and the inside of the anti-permeability test mold. Place the mortar specimen to be tested into the anti-permeability test mold for the anti-permeability test. S4. Recycling of sealing material: After the impermeability test, scrape the sealing material on the surface of the mortar specimen and the inside of the impermeability test mold into a sealed container containing desiccant. After the desiccant has completely absorbed the moisture brought in during the impermeability test, stir the sealing material evenly to achieve recycling of the sealing material.

7. The method for preparing and using a sealing material for testing the impermeability pressure of mortar according to claim 6, characterized in that, In step S3, the thickness of the pressure coating is 0.6mm~0.8mm. The mortar specimen to be tested is placed into the anti-permeability test mold and pressure is applied to press it compact. The sealant overflowing from the upper and lower edges of the mortar specimen to be tested during the pressing and compaction process is scraped clean before the anti-permeability test is carried out.

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