Asphalt-based leakage treatment material capable of operating with water and preparation method of asphalt-based leakage treatment material

Abstract

The invention discloses an asphalt-based leakage treatment material capable of operating with water and a preparation method of the asphalt-based leakage treatment material, and relates to the technical field of underground engineering structure leakage treatment. The asphalt-based leakage treatment material provided by the invention comprises the following raw material components in parts by mass: 90-110 parts of petroleum asphalt, 2-6 parts of polyether polyurethane, 5-15 parts of epoxy resin, 10-15 parts of a water-absorbing swelling agent, 5-10 parts of a plasticizer and 2-6 parts of a porous carrier filler. According to the asphalt-based leakage treatment material capable of working with water, limitation of a traditional leakage treatment material is broken through by means of the synergistic effect of the components such as the matrix petroleum asphalt, the polyether polyurethane, the epoxy resin and the water-absorbing expanding agent, efficient plugging under the condition of working with water is achieved, meanwhile, the asphalt-based leakage treatment material has excellent durability and deformation adaptability, and the service life of the asphalt-based leakage treatment material is prolonged. And the leakage treatment requirements of large-deformation parts (such as deformation joints and tunnel ring beams) of the structure can be precisely met, and the comprehensive performance and economical efficiency advantages are remarkable.

Description

Technical Field

[0001] This invention relates to the field of underground engineering structure leakage control technology, and in particular to an asphalt-based leakage control material that can be used in water-bearing applications and its preparation method. Background Technology

[0002] Grouting materials for leakage control are mainly divided into two categories: inorganic and organic materials. Inorganic grouting materials are primarily cement-based, offering advantages such as low cost, ease of application, and no environmental pollution. However, cement-based materials are relatively rigid and prone to peeling and cracking at the interface with the old concrete in structural parts subject to large deformation and frequent vibration. Organic grouting materials mainly include epoxy resins, polyurethanes, and acrylates. Epoxy resins are widely used in underground structure reinforcement and leakage control due to their high cured strength and good stability. However, because they possess rigidity similar to cement-based materials, they are not suitable for leakage control in detailed structural parts such as deformation joints, tunnel ring beams, and connections between different structures where significant deformation occurs. Polyurethane grouting materials are widely used in emergency repairs of structural leaks due to their high foaming rate and rapid water-stopping properties. However, after foaming and expanding, they do not bond with the concrete interface and have poor durability, resulting in a high re-leakage rate. Acrylic grouting materials typically have good deformation and bonding capabilities, but they have low strength and are prone to aging after wet-dry cycles, resulting in poor durability.

[0003] Asphalt-based materials are widely used in waterproofing due to their excellent waterproofing properties and durability. However, asphalt is primarily used as an adhesive for road materials or a raw material for waterproof membranes, with relatively little research on its application in leakage control. As a composite material exhibiting both viscoelastic and plastic properties, asphalt possesses stress relaxation and creep characteristics, demonstrating excellent adhesion to concrete and making it highly suitable for sealing and waterproofing areas with large structural deformations. Furthermore, asphalt's viscosity is directly related to temperature, allowing it to bond to the concrete surface immediately after injection into cracks, without requiring curing. Therefore, asphalt-based materials have the potential to be used as grouting materials. However, as a hydrophobic waterproofing material, asphalt exhibits poor adhesion to damp concrete surfaces, making it less suitable for damp and water-rich environments used in leakage control. Summary of the Invention

[0004] The purpose of this invention is to provide an asphalt-based leakage control material and its preparation method to solve the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides an asphalt-based leakage treatment material, comprising the following raw material components in parts by weight:

[0007] 90-110 parts of petroleum asphalt, 2-6 parts of polyether polyurethane, 5-15 parts of epoxy resin, 10-15 parts of water-absorbing swelling agent, 5-10 parts of plasticizer, and 2-6 parts of porous carrier filler.

[0008] As a further preferred embodiment of the present invention, the polyether polyurethane has a solid content >60%, a tensile strength >8MPa at 25°C, a water absorption rate <0.8%, and a bond strength >3MPa.

[0009] As a further preferred embodiment of the present invention, the water-absorbing and swelling agent is sodium polyacrylate.

[0010] As a further preferred embodiment of the present invention, the plasticizer is a naphthenic oil.

[0011] As a further preferred embodiment of the present invention, the porous carrier filler is expanded perlite.

[0012] As a further preferred embodiment of the present invention, the epoxy resin is an E51 type epoxy resin. In the E51 type epoxy resin, the mass ratio of component A to component B is 4:1.

[0013] This invention also provides a method for preparing the above-mentioned asphalt-based leakage treatment material, comprising the following steps:

[0014] The petroleum asphalt is heated to a fluid state, and then the plasticizer, polyether polyurethane and epoxy resin are added and stirred to obtain composite modified asphalt.

[0015] The composite modified asphalt is left to stand and develop.

[0016] The water-absorbing expansion agent and porous carrier filler are added to the composite modified asphalt after static development and stirred to obtain the asphalt-based leakage control material.

[0017] This invention further provides a method for determining the water pressure resistance of the above-mentioned asphalt-based leakage control material, based on interfacial shear testing, including the following steps:

[0018] Cement test block surface pretreatment: Depending on the test interface condition, the cement test block surface is pretreated by one of three types: dry substrate, damp substrate, or water-rich substrate; the number of cement test blocks is ≥2.

[0019] Constructing an asphalt model: Pre-treated cement test blocks are used to form a structural joint template, and the asphalt-based leakage control material is poured into the structural joints constructed by the cement test blocks.

[0020] Pressure test: Cool the constructed asphalt model and continuously pressurize it until the asphalt-based leakage treatment material is completely extruded or separated from the interface with the cement test block, and record the maximum pressure value at this time;

[0021] Compressive strength calculation: The compressive strength of the asphalt-based leakage treatment material is calculated based on the maximum pressure value.

[0022] As a further preferred embodiment of the present invention, the method for treating the dry substrate is as follows: the cement test block is dried at 120-140℃ for more than 4 hours, and the temperature of the cement test block is reduced to 20℃±1℃ when the asphalt-based leakage treatment material is poured; the method for treating the damp substrate is as follows: the cement test block is soaked in water at 20℃±1℃ for 24-36 hours, and after being taken out, the water stains are removed and it is left to dry for 5 minutes; the method for treating the water-rich substrate is as follows: the cement test block is soaked in water at 20℃±1℃ for 24-36 hours.

[0023] As a further preferred embodiment of the present invention, when treating a water-rich substrate, the cement test block is removed after soaking. Before pouring the asphalt-based leakage treatment material, the structural gap template formed by the pretreated cement test block is filled with water at 20℃±1℃. Then, the asphalt-based leakage treatment material is poured to squeeze out the water.

[0024] In the raw material components of the asphalt-based leakage treatment material of this invention, the base petroleum asphalt provides basic waterproofing and viscoelasticity, while the polyether polyurethane enhances the material's toughness and fatigue resistance, ensuring it is not easily broken under structural deformation conditions. The plasticizer reduces the low-temperature viscosity of the asphalt, meeting the fluidity requirements of grouting construction. The water-absorbing and expanding agent can treat the moisture in the leakage area and cause micro-expansion, improving the moisture content state at the interface with concrete and increasing the interfacial pressure, thus solving the problem of poor adhesion of traditional asphalt in humid environments. The epoxy resin enhances the cohesion of the asphalt to improve the bonding effect, while the porous carrier filler improves mechanical properties while reducing costs, making the overall performance of the material superior to traditional leakage treatment materials.

[0025] In this invention, polyether-type polyurethane, as a key component of asphalt-based leakage control materials, enhances material performance through two aspects:

[0026] Chemical reaction to build cross-linked network: The highly active isocyanate groups at the end of the polyurethane prepolymer can undergo addition reactions with the hydroxyl, carboxyl and other active hydrogen-containing groups on the surface of the active components in asphalt to generate strong chemical bonds such as urethane bonds, thereby forming a stable three-dimensional cross-linked network structure inside the asphalt, effectively improving the toughness, elastic recovery and deformation resistance of asphalt.

[0027] The molecular structure imparts comprehensive performance: Polyether polyurethane itself is a block copolymer, and its molecular structure is composed of alternating "soft segments" and "hard segments". The soft segments can provide flexibility and elasticity, preventing asphalt from cracking at low temperatures, while also giving the material good stress relaxation and deformation recovery capabilities; the hard segments can provide rigidity and strength, forming physical cross-linking points, further enhancing the toughness and overall structural strength of the asphalt.

[0028] This invention provides an asphalt-based leakage control material with excellent operational adaptability and scenario suitability. It can complete structural leakage control under wet conditions, and is especially suitable for large deformation areas such as expansion joints, tunnel ring beams, and connections between different structures. It overcomes the shortcomings of traditional inorganic grouting materials (such as cement-based materials) which are rigid and easy to peel off, and organic grouting materials (such as epoxy resin-based materials which are not suitable for deformation areas, polyurethane-based materials which have poor durability and high re-leakage rate, and acrylate-based materials which have low strength and are easy to age). It also has the characteristics of good durability, excellent deformation performance, and low cost, thus broadening the application range of leakage control materials.

[0029] This invention provides a method for evaluating the water pressure resistance of materials based on interfacial shear testing. This method can intuitively quantify the water pressure resistance of sealing materials in structural gaps. Furthermore, by treating different interfacial states, it can verify whether the material can be tested in a humid or wet environment.

[0030] The present invention discloses the following technical effects:

[0031] The asphalt-based leakage control material provided by this invention, which can be used in water-bearing operations, relies on the synergistic effect of components such as base petroleum asphalt, polyether polyurethane, epoxy resin, and water-absorbing expansion agent to overcome the limitations of traditional leakage control materials, achieve efficient sealing under water-bearing conditions, and at the same time have excellent durability and deformation adaptability. It can be precisely adapted to the leakage control needs of structural deformation parts (such as expansion joints and tunnel ring beams), and has significant comprehensive performance and economic advantages. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 A schematic diagram (a) and a physical image (b) of the device for testing the water pressure resistance of materials according to the present invention.

[0034] Figure 2 This is a water pressure test diagram of the asphalt-based leakage treatment material in Example 3 under water-rich substrate conditions.

[0035] Figure 3 This is a water pressure test diagram of Comparative Example 2 (70# petroleum asphalt) under dry substrate conditions.

[0036] Figure 4 This is a water pressure test diagram of Comparative Example 3 (commercial SBS modified bitumen) under water-rich substrate conditions.

[0037] Figure 5This is a diagram of the water pressure resistance test of Comparative Example 4 under wet substrate conditions. Detailed Implementation

[0038] Various exemplary embodiments of the present invention will now be described in detail. This detailed description should not be considered as a limitation of the present invention, but rather as a more detailed description of certain aspects, features, and embodiments of the present invention.

[0039] It should be understood that the terminology used in this invention is merely for describing particular embodiments and is not intended to limit the invention. Furthermore, with respect to numerical ranges in this invention, it should be understood that each intermediate value between the upper and lower limits of the range is also specifically disclosed. Any stated value or intermediate value within a stated range, as well as each smaller range between any other stated value or intermediate value within said range, is also included in this invention. The upper and lower limits of these smaller ranges may be independently included or excluded from the range.

[0040] Unless otherwise stated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. While only preferred methods and materials have been described herein, any methods and materials similar or equivalent to those described herein may be used in the implementation or testing of this invention. All references to this specification are incorporated by way of citation to disclose and describe methods and / or materials associated with those references. In the event of any conflict with any incorporated reference, the content of this specification shall prevail.

[0041] Various modifications and variations can be made to the specific embodiments described in this specification without departing from the scope or spirit of the invention, as will be apparent to those skilled in the art. Other embodiments derived from this specification will also be readily apparent to those skilled in the art. This specification and embodiments are merely exemplary.

[0042] The terms “include,” “including,” “have,” “contain,” etc., used in this article are all open-ended terms, meaning that they include but are not limited to.

[0043] It should be noted that any aspects not described in detail in this invention are conventional practices in the field and are not the focus of this invention.

[0044] A first aspect of this invention: provides an asphalt-based leakage treatment material, comprising the following raw material components in parts by weight:

[0045] 90-110 parts of petroleum asphalt, 2-6 parts of polyether polyurethane, 5-15 parts of epoxy resin, 10-15 parts of water-absorbing swelling agent, 5-10 parts of plasticizer, and 2-6 parts of porous carrier filler.

[0046] Furthermore, the water-absorbing and swelling agent is sodium polyacrylate.

[0047] Furthermore, the plasticizer is a naphthenic oil.

[0048] Furthermore, the porous carrier filler is expanded perlite.

[0049] Furthermore, the epoxy resin is an E51 type epoxy resin.

[0050] A second aspect of the present invention provides a method for preparing the above-mentioned asphalt-based leakage control material, comprising the following steps:

[0051] The petroleum asphalt is heated to a fluid state, and then the plasticizer, polyether polyurethane and epoxy resin are added and stirred to obtain composite modified asphalt.

[0052] The composite modified asphalt is left to stand and develop.

[0053] The water-absorbing expansion agent and porous carrier filler are added to the composite modified asphalt after static development and stirred to obtain the asphalt-based leakage control material.

[0054] A third aspect of the present invention provides a method for determining the water pressure resistance of the above-mentioned asphalt-based leakage control material, based on interfacial shear testing, comprising the following steps:

[0055] Cement test block surface pretreatment: Depending on the test interface condition, the cement test block surface is pretreated by one of three types: dry substrate, damp substrate, or water-rich substrate; the number of cement test blocks is ≥2.

[0056] Constructing an asphalt model: Pre-treated cement test blocks are used to form a structural joint template, and the asphalt-based leakage control material is poured into the structural joints constructed by the cement test blocks.

[0057] Pressure test: Cool the constructed asphalt model and continuously pressurize it until the asphalt-based leakage treatment material is completely extruded or separated from the interface with the cement test block, and record the maximum pressure value at this time;

[0058] Compressive strength calculation: The compressive strength of the asphalt-based leakage treatment material is calculated based on the maximum pressure value.

[0059] Furthermore, the method for treating the dry substrate is as follows: the cement test block is dried at 120-140℃ for more than 4 hours, and the temperature of the cement test block is reduced to 20℃±1℃ when the asphalt-based leakage treatment material is poured; the method for treating the damp substrate is to soak the cement test block in water at 20℃±1℃ for 24-36 hours, remove it, remove water stains, and let it air dry for 5 minutes; the method for treating the water-rich substrate is to soak the cement test block in water at 20℃±1℃ for 24-36 hours.

[0060] Furthermore, when treating the water-rich substrate, the cement test block is removed after soaking. Before pouring the asphalt-based leakage treatment material, the structural gap template formed by the pretreated cement test block is filled with water at 20℃±1℃. Then, the asphalt-based leakage treatment material is poured to squeeze out the water.

[0061] The preparation method of the asphalt-based leakage control material more preferably includes the following steps:

[0062] Step 1: Heat the petroleum asphalt to a fluid state at a temperature of 130-150°C.

[0063] Step 2: Slowly pour the plasticizer into the petroleum asphalt and stir it using a high-speed shear mixer to ensure uniform mixing; the stirring temperature is 130-150℃, the stirring speed is 1500r / min, and the stirring time is 5min.

[0064] Step 3: Add the polyether polyurethane and component A of E51 epoxy resin to the asphalt in sequence, and continue to stir it with a high-speed shear mixer at a temperature of 140-150℃, a stirring rate of 2000 r / min, and a stirring time of 15 min to obtain the composite modified asphalt.

[0065] Step 4: Place the composite modified asphalt in a 120℃ oven and let it stand for 2 hours to mature.

[0066] Step 5: Add the water-absorbing expansion agent and porous filler to the petroleum asphalt that has been allowed to stand and develop in Step 4, and continue to stir it with a high-speed shear apparatus at a temperature of 130-150℃, a stirring rate of 2000 r / min, and a stirring time of 30 min.

[0067] Step 6: Before use, add component B of E51 epoxy resin to the petroleum asphalt system and stir for 10 minutes.

[0068] In the following embodiments of the present invention, component A of the E51 epoxy resin is the main component of the E51 epoxy resin, and component B is a phenolic amine epoxy resin curing agent.

[0069] The petroleum asphalt used in this embodiment of the invention is 70# petroleum asphalt; the polyether polyurethane used has a solid content of 73%, a tensile strength of 9.5 MPa at 25°C, a water absorption rate of 0.5%, and a bond strength of 3.2 MPa.

[0070] Example 1

[0071] This embodiment provides an asphalt-based structural leakage treatment material that can be applied while the material is wet. The raw materials, by weight, include the following components:

[0072] 90 parts petroleum asphalt, 2 parts polyether polyurethane, 5 parts E51 epoxy resin, 10 parts water-absorbing swelling agent, 5 parts plasticizer, and 2 parts porous carrier filler.

[0073] In the E51 type epoxy resin, the mass ratio of component A to component B is 4:1; the water-absorbing and swelling agent is sodium polyacrylate; the plasticizer is naphthenic oil; and the porous carrier filler is expanded perlite with a mesh size of 200 mesh.

[0074] The preparation process is as follows:

[0075] Step 1: Heat the petroleum asphalt to a fluid state at a temperature of 150°C.

[0076] Step 2: Slowly pour the plasticizer into the petroleum asphalt and stir it using a high-speed shear mixer until it is evenly mixed. The stirring temperature is 140℃, the stirring speed is 1500 r / min, and the stirring time is 5 min.

[0077] Step 3: Add the polyether polyurethane and component A of E51 epoxy resin to the petroleum asphalt from Step 2, and continue to stir it with a high-speed shear apparatus at a temperature of 140℃, a stirring rate of 2000 r / min, and a stirring time of 15 min to obtain the composite modified asphalt.

[0078] Step 4: Place the composite modified asphalt in a 120℃ oven and let it stand for 2 hours to mature.

[0079] Step 5: Add the water-absorbing expansion agent and porous filler to the composite modified asphalt that has been allowed to stand in Step 4, and continue to stir it with a high-speed shear apparatus at a stirring temperature of 140℃, a stirring rate of 2000 r / min, and a stirring time of 30 min to prepare the composite modified asphalt-based grouting material.

[0080] Step 6: Before use, add component B of E51 epoxy resin to the composite modified asphalt-based grouting material in proportion, stir for 10 minutes to obtain an asphalt-based structural leakage treatment material that can be used in water.

[0081] Test the water pressure resistance of the material:

[0082] Step 1: Make structural joint model specimens, and use No. 2 sandpaper to sand the surface of the cement test block to remove the surface laitance;

[0083] Step 2: Based on the different test interface conditions, the surface of the cement test blocks is pretreated, namely, dry substrate, damp substrate, and water-rich substrate. The dry substrate treatment method involves placing the cement test block in a 120℃ oven for more than 4 hours, then cooling it to room temperature (20℃±1℃) before pouring asphalt. The damp substrate treatment method involves immersing the cement test block in water (20℃±1℃) for 24 hours, then wiping off the water stains with a damp towel and letting it air dry for 5 minutes. The water-rich substrate treatment method involves immersing the cement test block in water (20℃±1℃) for 24 hours, then filling a mold with clean water (20℃±1℃) before pouring asphalt, and squeezing out the water using the poured asphalt.

[0084] Step 3: Use acrylic sheets to surround the cement test blocks to form a structural joint template. The width of the cast-in-place asphalt template is 40mm*30mm*50mm (length*width*height).

[0085] Step 4: After pouring asphalt, wait for the overall model to cool to room temperature, remove the acrylic plate, and use a servo press to conduct a pressure test. The press head is a customized flat plate press head (size is 28mm*40mm), the loading rate is (5±1)mm / min, and press until the asphalt pouring body is completely extruded or the interface separates. Record the maximum pressure value Fmax.

[0086] The compressive strength P (kPa) of the asphalt casting is calculated based on the following formula:

[0087] P = Fmax / S;

[0088] Where: Fmax is the maximum pressure value; S is the contact area between the pressure plate and the asphalt casting, i.e., 28mm * 40mm = 1120mm. 2 .

[0089] Figure 1 A schematic diagram (a) and a physical image (b) of an apparatus for testing the water pressure resistance of materials.

[0090] Example 2

[0091] This embodiment provides an asphalt-based structural leakage treatment material that can be applied while the material is wet. The raw materials, by weight, include the following components:

[0092] 110 parts petroleum asphalt, 6 parts polyether polyurethane, 15 parts E51 epoxy resin, 15 parts water-absorbing swelling agent, 10 parts plasticizer, and 6 parts porous carrier filler.

[0093] In the E51 type epoxy resin, the mass ratio of component A to component B is 4:1; the water-absorbing and swelling agent is sodium polyacrylate; the plasticizer is naphthenic oil; and the porous carrier filler is expanded perlite with a mesh size of 200 mesh.

[0094] The method for testing the water pressure resistance of the material is the same as in Example 1.

[0095] Example 3

[0096] This embodiment provides an asphalt-based structural leakage treatment material that can be applied while the material is wet. The raw materials, by weight, include the following components:

[0097] 100 parts petroleum asphalt, 4 parts polyether polyurethane, 10 parts E51 epoxy resin, 12 parts water-absorbing swelling agent, 8 parts plasticizer, and 4 parts porous carrier filler.

[0098] In the E51 type epoxy resin, the mass ratio of component A to component B is 4:1; the water-absorbing and swelling agent is sodium polyacrylate; the plasticizer is naphthenic oil; and the porous carrier filler is expanded perlite with a mesh size of 200 mesh.

[0099] The method for testing the water pressure resistance of the material is the same as in Example 1.

[0100] Comparative Example 1

[0101] The only difference from Example 3 is that no water-absorbing and swelling agent is added to the raw materials.

[0102] Comparative Example 2

[0103] 70# petroleum asphalt was used as the material for leakage control.

[0104] Comparative Example 3

[0105] Commercial modified asphalt SBS (IC, Shandong Expressway Huarui Road Materials Technology Co., Ltd.) was used as the leakage treatment material.

[0106] Comparative Example 4

[0107] The only difference from Example 3 is that the water-absorbing and swelling agent is adjusted to 7 parts.

[0108] Comparative Example 5

[0109] The only difference from Example 3 is that the water-absorbing and swelling agent is adjusted to 18 parts.

[0110] Table 1 shows the water pressure resistance of the leakage control materials of Examples 1-3 and Comparative Examples 1-5 under different substrates.

[0111] Table 1

[0112]

[0113] Note: Interface failure refers to the debonding of the asphalt cast-in-place structure at the interface with the concrete substrate (as shown in the image). Figure 4 Cohesive failure occurs when the asphalt cast-in-place structure itself is sheared (as shown in the image). Figure 2 and Figure 3 ).

[0114] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. An asphalt-based leakage treatment material, characterized in that, The raw material components include the following parts by weight: 90-110 parts of petroleum asphalt, 2-6 parts of polyether polyurethane, 5-15 parts of epoxy resin, 10-15 parts of water-absorbing swelling agent, 5-10 parts of plasticizer, and 2-6 parts of porous carrier filler.

2. The asphalt-based leakage treatment material according to claim 1, characterized in that, The polyether-type polyurethane has a solid content >60%, a tensile strength >8MPa at 25℃, a water absorption rate <0.8%, and a bond strength >3MPa.

3. The asphalt-based leakage treatment material according to claim 1, characterized in that, The water-absorbing and swelling agent is sodium polyacrylate.

4. The asphalt-based leakage treatment material according to claim 1, characterized in that, The plasticizer is a naphthenic oil.

5. The asphalt-based leakage control material according to claim 1, characterized in that, The porous carrier filler is expanded perlite.

6. The asphalt-based leakage control material according to claim 1, characterized in that, The epoxy resin is E51 type epoxy resin.

7. The method for preparing the asphalt-based leakage control material according to any one of claims 1-6, characterized in that, Includes the following steps: The petroleum asphalt is heated to a fluid state, and then the plasticizer, polyether polyurethane and epoxy resin are added and stirred to obtain composite modified asphalt. The composite modified asphalt is left to stand and develop. The water-absorbing expansion agent and porous carrier filler are added to the composite modified asphalt after static development and stirred to obtain the asphalt-based leakage control material.

8. A method for determining the water pressure resistance of the asphalt-based leakage control material according to any one of claims 1-6, characterized in that, Based on the interface clipping test, the following steps are included: Cement test block surface pretreatment: Depending on the test interface condition, the cement test block surface is pretreated by one of three types: dry substrate, damp substrate, or water-rich substrate; the number of cement test blocks is ≥2. Constructing an asphalt model: Pre-treated cement test blocks are used to form a structural joint template, and the asphalt-based leakage control material is poured into the structural joints constructed by the cement test blocks. Pressure test: Cool the constructed asphalt model and continuously pressurize it until the asphalt-based leakage treatment material is completely extruded or separated from the interface with the cement test block, and record the maximum pressure value at this time; Compressive strength calculation: The compressive strength of the asphalt-based leakage treatment material is calculated based on the maximum pressure value.

9. The method for determining water pressure resistance according to claim 8, characterized in that, The method for treating the dry substrate is as follows: dry the cement test block at 120-140℃ for more than 4 hours, and when pouring the asphalt-based leakage treatment material, reduce the temperature of the cement test block to 20℃±1℃; the method for treating the damp substrate is as follows: soak the cement test block in water at 20℃±1℃ for 24-36 hours, remove it, remove water stains, and let it air dry for 5 minutes; the method for treating the water-rich substrate is as follows: soak the cement test block in water at 20℃±1℃ for 24-36 hours.

10. The method for determining water pressure resistance according to claim 9, characterized in that, When treating a water-rich substrate, after soaking the cement test block, take it out and fill the structural gap template formed by the pretreated cement test block with water at 20℃±1℃ before pouring the asphalt-based leakage treatment material. Then pour the asphalt-based leakage treatment material to squeeze out the water.

Images