Self-healing exposed hot-stick modified asphalt waterproofing membrane and its application

Abstract

The application provides a self-healing exposed hot-bonding modified asphalt waterproof coiled material and an application thereof, and belongs to the technical field of building waterproofing. The self-healing exposed hot-bonding modified asphalt waterproof coiled material comprises, from top to bottom, a surface weather-resistant layer, an upper self-healing waterproof layer, a light-heat induction layer, a reinforcing layer, a lower self-healing waterproof layer and a separation layer. The upper self-healing waterproof layer and / or the lower self-healing waterproof layer each comprises a self-healing waterproof adhesive, and the self-healing waterproof adhesive comprises asphalt, a first light-heat induction agent, a microcapsule self-healing agent and a dynamic chemical self-healing agent. The wall material of the microcapsule self-healing agent is at least one of urea-formaldehyde resin, melamine resin and polyurethane, and the core material is at least one of hydrogenated rosin glyceride, naphthenic oil and asphalt regenerant. The dynamic chemical self-healing agent comprises at least one of a disulfide bond-containing polymer and a diselenide bond-containing polymer. The light-heat induction layer comprises a first self-adhesive coating and a second light-heat induction agent.

Description

Technical Field

[0001] This application relates to the field of building waterproofing technology, and in particular to a self-healing exposed heat-adhesive modified bitumen waterproof membrane and its application. Background Technology

[0002] Exposed modified bitumen waterproof membranes are directly exposed to ultraviolet radiation, high and low temperature cycles, rainwater erosion, and potential physical damage (such as installation punctures and substrate deformation) for extended periods, requiring high performance in terms of high temperature and aging resistance. In related technologies, to improve weather resistance, the self-adhesive waterproof bitumen in exposed modified bitumen waterproof membranes is typically designed with a high softening point structure, and surface reflective insulation or the introduction of self-healing components are used to delay aging or repair damage. However, while existing reflective insulation designs lower the service temperature of the membrane, they also inhibit the movement of molecular chains within the material, leading to a significant decrease in bitumen fluidity and self-healing reactivity. Furthermore, in related self-healing technologies, microcapsule self-healing agents are mostly one-time, passively triggered, with limited repair capabilities. Self-healing systems based on dynamic chemical bonds are highly sensitive to temperature, resulting in low repair efficiency under low temperature or restricted conditions. External energy triggering methods rely on specialized equipment, making them unsuitable for existing structures. Summary of the Invention

[0003] In view of this, this application provides a self-healing exposed heat-adhesive modified bitumen waterproof membrane and its application.

[0004] According to one embodiment of this application, a self-healing exposed heat-adhesive modified bitumen waterproof membrane is provided, which, from top to bottom, comprises: a surface weather-resistant layer, an upper self-healing waterproof layer, a photothermal sensing layer, a reinforcing layer, a lower self-healing waterproof layer, and an isolation layer. The upper self-healing waterproof layer and / or the lower self-healing waterproof layer each independently include a self-healing waterproof adhesive, which includes bitumen, a first photothermal sensing agent, a microcapsule self-healing agent, and a dynamic chemical self-healing agent. The wall material of the microcapsule self-healing agent is at least one of urea-formaldehyde resin, melamine resin, and polyurethane, and the core material is at least one of hydrogenated rosin glycerol ester, naphthenic oil, and bitumen recycling agent. The dynamic chemical self-healing agent includes at least one polymer containing disulfide bonds and a polymer containing diselenyl bonds. The photothermal sensing layer includes a first self-adhesive coating and a second photothermal sensing agent. The first and second photothermal sensing agents each independently include a near-infrared photothermal conversion material.

[0005] According to another embodiment of this application, the application of the above-mentioned self-healing exposed heat-adhesive modified bitumen waterproof membrane in building waterproofing construction is provided.

[0006] According to embodiments of this application, by sequentially setting a surface weather-resistant layer, an upper self-healing waterproof layer, a photothermal sensing layer, a reinforcing layer, a lower self-healing waterproof layer, and an isolation layer from top to bottom in a self-healing exposed heat-adhesive modified bitumen waterproof membrane, it is beneficial to provide a layered and synergistic self-healing response basis for damaged areas while ensuring the overall exposed weather resistance performance of the membrane. Specifically, the upper and / or lower self-healing waterproof layers incorporate a self-healing waterproof adhesive containing both microcapsule self-healing agents and dynamic chemical self-healing agents. This allows the material to preferentially trigger microcapsule rupture and release the core material under stress when subjected to external force, achieving rapid filling and initial physical sealing of the damaged area, thereby preventing instantaneous moisture intrusion. The disulfide bonds or diselenyl bonds in the dynamic chemical self-healing agent can undergo reversible exchange reactions under suitable thermal conditions, causing the polymer chain segments in the damaged area to reconnect and reconstruct a continuous network structure, thereby restoring the mechanical properties and density of the self-healing waterproof adhesive. The second photothermal sensing agent in the photothermal sensing layer and the first photothermal sensing agent in the self-healing waterproof adhesive both use near-infrared photothermal conversion materials. When the surface of the roll material is damaged and the corresponding photothermal sensing components are exposed, the near-infrared light energy in the environment can be converted into local heat energy, forming a high-temperature environment concentrated in the damaged area to accelerate the dynamic chemical self-healing reaction and improve the self-healing efficiency. At the same time, under the limiting and supporting effect of the reinforcing layer, the local heat activation process mainly acts on the self-healing waterproof layer without causing the overall temperature of the roll material to rise, thereby improving the self-healing performance while avoiding the degradation of material performance caused by overall heat accumulation.

[0007] Therefore, this application integrates two self-healing mechanisms: stress-triggered microcapsule self-healing agents and photothermal-triggered dynamic chemical self-healing agents. Damage triggers different responses from the surface inward: stress triggering provides a second-level physical seal to prevent instantaneous moisture intrusion; photothermal triggering provides hour-level chemical healing to restore the material's intrinsic strength; the photothermal sensing layer further increases the local temperature, promoting chemical healing; and the lower self-healing waterproof layer serves as a secondary protection. This spatiotemporal gradient repair and mechanistic synergy enhance the reliability and durability of the repair. Attached Figure Description

[0008] The above and other objects, features and advantages of this application will become clearer from the following description of embodiments with reference to the accompanying drawings, in which:

[0009] Figure 1 This illustration shows a structural schematic diagram of the exposed high weather-resistant self-adhesive waterproof membrane provided in an embodiment of this application;

[0010] Figure 2 A schematic diagram of the structure of an exposed, highly weather-resistant, self-adhesive waterproof membrane provided in another embodiment of this application is shown.

[0011] [Explanation of Labels in the Attached Image]

[0012] 1- Surface weather-resistant layer;

[0013] 2. Apply a self-healing waterproof layer;

[0014] 3-Photothermal sensing layer;

[0015] 4-Reinforcement layer;

[0016] 5- Self-healing waterproof layer;

[0017] 6-Alert layer;

[0018] 7-Isolation layer. Detailed Implementation

[0019] The embodiments of this application will now be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of this application. In the following detailed description, numerous specific details are set forth to provide a thorough understanding of the embodiments of this application for ease of explanation. However, it will be apparent that one or more embodiments may be implemented without these specific details. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of this application.

[0020] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this application. The term "comprising" as used herein indicates the presence of features, steps, or operations, but does not exclude the presence or addition of one or more other features.

[0021] When using expressions such as "at least one of A, B and C", they should generally be interpreted in accordance with the meaning that is commonly understood by those skilled in the art (e.g., "a system having at least one of A, B and C" should include, but is not limited to, a system having A alone, a system having B alone, a system having C alone, a system having A and B, a system having A and C, a system having B and C, and / or a system having A, B and C, etc.).

[0022] In related technologies, exposed modified bitumen waterproof membranes are directly exposed to ultraviolet rays, high and low temperature cycles, rainwater erosion and potential physical damage (such as installation punctures and base deformation) for a long time, which requires high high temperature performance and aging resistance of the products. In related technologies, in order to improve weather resistance, the softening point of the products is generally high. At the same time, the two technical routes adopted to improve exposed weather resistance also have obvious limitations, mainly reflected in the following aspects: (1) Microcapsules contain repair agents, which are only passively released when damaged, and are one-time repairs. They cannot achieve long-term repeated self-healing, and the repair efficiency is limited. (2) The self-healing efficiency of dynamic chemical bonds depends on temperature: Although reversible networks based on hydrogen bonds or ionic bonds can achieve repeated self-healing, the movement of molecular chains is limited under low temperature conditions, the bonding and recombination are slow, and the self-healing process is inefficient. (3) External energy triggering methods are not suitable for actual roofs: Self-healing is activated by microwave or electromagnetic induction heating, which requires large equipment for overall heating. It is not suitable for built roofs. At the same time, overall heating can easily accelerate material aging. (4) There is a fundamental conflict between weather resistance and self-healing: the reflective heat insulation design reduces the surface temperature of the roll material to improve durability, but most self-healing mechanisms require heat to activate, which severely inhibits the self-healing ability of exposed roll materials. Existing technologies cannot simultaneously achieve both durability and efficient self-healing.

[0023] In realizing this application, it was discovered that by integrating two self-healing mechanisms—stress-triggered microcapsule self-healing agents and photothermal-triggered dynamic chemical self-healing agents—different responses are triggered from the surface to the interior of the damage: stress triggering provides a second-level physical seal to prevent instantaneous moisture intrusion; photothermal triggering provides hour-level chemical healing to restore the material's intrinsic strength; the photothermal sensing layer further increases the local temperature, promoting chemical healing; and the lower self-healing waterproof layer serves as a secondary protection. This gradient repair and synergistic mechanism enhances the reliability and durability of the repair.

[0024] In view of this, an embodiment of the first aspect of this application provides a self-healing exposed heat-adhesive modified bitumen waterproof membrane. Figure 1 This diagram illustrates the structure of the exposed high weather-resistant self-adhesive waterproof membrane provided in an embodiment of this application. From top to bottom, it comprises: a surface weather-resistant layer 1, an upper self-healing waterproof layer 2, a photothermal sensing layer 3, a reinforcing layer 4, a lower self-healing waterproof layer 5, and an isolation layer 7. The upper self-healing waterproof layer 2 and / or the lower self-healing waterproof layer 5 each independently include a self-healing waterproof adhesive, which includes asphalt, a first photothermal sensing agent, a microcapsule self-healing agent, and a dynamic chemical self-healing agent. The wall material of the microcapsule self-healing agent is at least one of urea-formaldehyde resin, melamine resin, and polyurethane, and the core material is at least one of hydrogenated rosin glycerol ester, naphthenic oil, and asphalt recycling agent. The dynamic chemical self-healing agent includes at least one polymer containing disulfide bonds and a polymer containing diselenyl bonds. The photothermal sensing layer 3 includes a first self-adhesive coating and a second photothermal sensing agent. The first and second photothermal sensing agents each independently include a near-infrared photothermal conversion material.

[0025] According to embodiments of this application, a self-healing waterproofing compound containing both microcapsule self-healing agents and dynamic chemical self-healing agents is introduced into the upper self-healing waterproof layer 2 and / or the lower self-healing waterproof layer 5 of a self-healing exposed heat-adhesive modified bitumen waterproofing membrane. This allows the material to preferentially trigger microcapsule rupture and release the core material under stress when subjected to external force, achieving rapid filling and initial physical sealing of the damaged area, thereby preventing instantaneous moisture intrusion. The disulfide bonds or diselenyl bonds in the dynamic chemical self-healing agent can undergo reversible exchange reactions under suitable thermal conditions, causing the polymer chain segments in the damaged area to reconnect and reconstruct a continuous network structure, thereby restoring the mechanical properties and density of the self-healing waterproofing compound. The second photothermal sensing agent in the photothermal sensing layer 3 and the first photothermal sensing agent in the self-healing waterproof adhesive both use near-infrared photothermal conversion materials. When the surface of the roll material is damaged and the corresponding photothermal sensing components are exposed, the near-infrared light energy in the environment can be converted into local heat energy, forming a high-temperature environment concentrated in the damaged area to accelerate the dynamic chemical self-healing reaction and improve the self-healing efficiency. At the same time, under the limiting and supporting effect of the reinforcing layer 4, the local heat activation process mainly acts on the self-healing waterproof layer without causing the overall temperature of the roll material to rise, thereby improving the self-healing performance while avoiding the degradation of material performance caused by overall heat accumulation.

[0026] According to embodiments of this application, the polymer containing disulfide bonds in the dynamic chemical self-healing agent may include at least one of polyurethane containing disulfide bonds and polyurea-polyurethane containing disulfide bonds. The polymer containing diselenide bonds includes at least one of polyurethane containing diselenide bonds and polyurea-polyurethane containing diselenide bonds. By introducing the above-mentioned dynamic chemical self-healing agent into the self-healing waterproof adhesive, the reversible breaking and recombination mechanism of disulfide or diselenide bonds can be used to achieve the recombination of polymer chain segments and the restoration of the network structure after the waterproof membrane is damaged, thereby providing the membrane with a continuous structural self-healing function and restoring the damaged area and waterproof performance.

[0027] According to embodiments of this application, the asphalt rejuvenator in the core material of the microcapsule self-healing agent can be a general-purpose additive for restoring the basic properties of aged asphalt. This application does not particularly limit the specific components of the asphalt rejuvenator, as long as they achieve the purpose of this application. Exemplarily, the asphalt rejuvenator may include petroleum fractions, vegetable oils, or synthetic oils for restoring the flexibility and viscosity of asphalt.

[0028] According to embodiments of this application, in the self-healing waterproof adhesive, the asphalt may include 70# asphalt and 200# asphalt, the mass fraction of 70# asphalt may be 20 to 35 parts, the mass fraction of 200# asphalt may be 15 to 25 parts, the mass fraction of the first photothermal sensor may be 1 to 2 parts, the mass fraction of the microcapsule self-healing agent may be 2 to 4 parts, and the mass fraction of the dynamic chemical self-healing agent may be 1 to 2 parts. For example, the mass fraction of 70# asphalt can be 20 parts, 22 parts, 25 parts, 28 parts, 30 parts, 32 parts, 35 parts or more, or any two values; the mass fraction of 200# asphalt can be 15 parts, 18 parts, 20 parts, 22 parts, 25 parts or more, or any two values; the mass fraction of the first photothermal induction agent can be 1 part, 1.2 parts, 1.5 parts, 1.8 parts, 2 parts or more, or any two values; the mass fraction of the microcapsule self-healing agent can be 2 parts, 2.2 parts, 2.5 parts, 2.8 parts, 3 parts, 3.2 parts, 3.5 parts, 3.8 parts, 4 parts or more, or any two values; and the mass fraction of the dynamic chemical self-healing agent can be 1 part, 1.2 parts, 1.5 parts, 1.8 parts, 2 parts or more, or any two values. By synergistically proportioning the mass fractions of asphalt, the first photothermal sensor, the microcapsule self-healing agent, and the dynamic chemical self-healing agent in the self-healing waterproofing compound, the asphalt matrix provides a stable load-bearing and mass transfer basis for the self-healing components while ensuring basic adhesion and rheological properties. The first photothermal sensor effectively converts external near-infrared light into localized heat during the reaction process, providing thermal activation conditions for the rupture and release of the microcapsule self-healing agent and the reversible chemical bond breaking and recombination of the dynamic chemical self-healing agent. Simultaneously, the microcapsule self-healing agent promptly releases repair components when microcracks appear in the membrane, forming a physical-chemical synergistic repair with the asphalt matrix. Thus, without sacrificing high-temperature stability and adhesion performance, the self-healing efficiency, structural integrity, and long-term reliability of the self-healing exposed heat-modified asphalt waterproofing membrane in complex environments are improved.

[0029] According to embodiments of this application, the self-healing waterproof adhesive may further include at least one of thermoplastic elastomer, thermoplastic plastic, and filler.

[0030] In some embodiments of this application, the thermoplastic elastomer includes at least one of styrene-butadiene-styrene thermoplastic elastomer and styrene-isoprene-styrene thermoplastic elastomer.

[0031] In some embodiments of this application, the thermoplastic elastomer may include star-shaped elastomers and linear elastomers. When the self-healing waterproof adhesive includes a thermoplastic elastomer, the mass fraction of the star-shaped thermoplastic elastomer may be 4 to 6 parts, and the mass fraction of the linear thermoplastic elastomer may be 4 to 5 parts. Introducing star-shaped and linear elastomers helps improve the flexibility and cohesive stability of the adhesive, enhances the adaptability of the roll material to temperature changes and structural deformation, thereby contributing to the stable performance of self-healing and durability properties.

[0032] In some embodiments of this application, the thermoplastic emulsion includes at least one of amorphous α-olefin copolymers, low-density polyethylene, ethylene-vinyl acetate copolymers, and ethylene-acrylate copolymers. When the self-healing waterproof adhesive includes a thermoplastic emulsion, the mass fraction of the thermoplastic emulsion is 2 to 4 parts. Exemplarily, the mass fraction of the thermoplastic emulsion can be any two of the following values: 2 parts, 2.5 parts, 3 parts, 3.5 parts, 4 parts, or more. Introducing a thermoplastic emulsion helps improve the mechanical strength and dimensional stability of the adhesive, improves its flow resistance under high-temperature conditions, thereby enhancing the structural stability and durability of the roll material in exposed environments, and providing a stable material basis for the effective realization of the self-healing function.

[0033] This application does not specifically limit the filler, as long as it achieves the purpose of this application. In some embodiments of this application, the filler may include at least one of calcium carbonate, heavy calcium carbonate, and light calcium carbonate. The mass fraction of the filler is 20 to 30 parts, exemplarily, the mass fraction of the filler can be any two values ​​between 20, 22, 25, 28, 30, or more. By introducing an appropriate amount of filler into the self-healing waterproof adhesive, on the one hand, the structural stability and high-temperature resistance of the adhesive can be improved, and the flow and deformation under high-temperature conditions can be suppressed; on the other hand, the filler can adjust the viscoelastic properties of the adhesive, so that the adhesive still maintains a certain fluidity and recovery ability after damage, thereby improving the hot-applied construction adaptability and long-term service stability of the roll material without significantly weakening the self-healing performance.

[0034] By synergistically adjusting the mass fractions of thermoplastic elastomers, thermoplastic plastics, and / or fillers in self-healing waterproofing adhesives, it is possible to ensure the normal functioning of the self-healing components while taking into account the elastic recovery ability, structural stability, and high-temperature deformation resistance of the adhesive. This is beneficial for achieving stable mechanical and self-healing properties of self-healing exposed hot-adhesive modified bitumen waterproofing membranes under complex conditions.

[0035] In some embodiments of this application, the self-healing waterproof adhesive may further include a flame retardant to improve its flame retardant properties. This application does not specifically limit the flame retardant, as long as it achieves the purpose of this application. Exemplarily, the flame retardant may include at least one of phosphorus-based flame retardants (such as ammonium polyphosphate, phosphate esters, etc.), nitrogen-based flame retardants (such as melamine, melamine cyanurate, etc.), and inorganic mineral-based flame retardants (such as aluminum hydroxide, magnesium hydroxide, etc.).

[0036] In some embodiments of this application, the self-healing waterproof adhesive may further include a tackifying resin to improve bonding performance, optimize the viscoelastic properties of the adhesive, and enhance overall performance. This application does not specifically limit the type of tackifying resin, as long as it achieves the purpose of this application. For example, the tackifying resin may include at least one of C5 petroleum resin and C9 petroleum resin.

[0037] According to embodiments of this application, the first self-adhesive coating in the photothermal sensing layer 3 may include at least one of acrylic emulsion adhesive coatings, polyurethane emulsion adhesive coatings, asphalt coatings, and epoxy emulsion adhesive coatings. By providing the first self-adhesive coating and the second photothermal sensing agent, the dispersion stability of the photothermal sensing agent in the waterproofing system and its interfacial adhesion performance with the upper self-healing waterproof layer 2 and / or the lower self-healing waterproof layer 5 can be improved. This facilitates the effective conversion of light energy into heat energy and its transfer to the interior of the self-healing waterproof adhesive, thereby promoting the self-healing process and improving the self-healing reliability and service stability of the waterproof membrane during service.

[0038] According to embodiments of this application, the near-infrared photothermal conversion material in the photothermal sensing layer 3 may be the same as or different from the near-infrared photothermal conversion material in the upper self-healing waterproof layer 2 and / or the lower self-healing waterproof layer 5. The near-infrared photothermal conversion material may include at least one of carbon-based nanomaterials, transition metal carbide nanomaterials, transition metal nitride nanomaterials, and semiconductor nanomaterials. Exemplarily, the carbon-based nanomaterials include at least one of carbon nanotubes, graphene, and nano-carbon black; the transition metal carbide nanomaterials include at least one of titanium carbide nanomaterials and niobium carbide nanomaterials; the transition metal nitride nanomaterials include at least one of titanium nitride nanomaterials, vanadium nitride nanomaterials, and tungsten nitride nanomaterials; and the semiconductor nanomaterials include at least one of copper sulfide nanoparticles and tungsten bronze nanoparticles. By setting a first photothermal sensor in the self-healing waterproof adhesive and setting a photothermal sensing layer 3 containing a second photothermal sensor in the roll material, the near-infrared photothermal conversion material can realize the conversion and transfer of light energy to heat energy under solar radiation conditions in the interior and surface structure of the waterproof adhesive. This provides the necessary thermal activation conditions for the release of the microcapsule self-healing agent and the dynamic chemical self-healing reaction, which is beneficial to improving the self-healing response efficiency and waterproof performance stability of the upper self-healing waterproof layer 2 and / or the lower self-healing waterproof layer 5.

[0039] According to embodiments of this application, the surface weathering layer 1 is not particularly limited, as long as it achieves the purpose of this application. Exemplarily, the surface weathering layer may include at least one of a weathering-resistant particle layer, a weathering-resistant coating, and a weathering-resistant film. By providing a weathering-resistant particle layer, a weathering-resistant coating, and / or a weathering-resistant film in a self-healing exposed hot-adhesive modified bitumen waterproof membrane, the resistance of the membrane surface to ultraviolet radiation, rainwater erosion, and temperature cycling can be enhanced, slowing down bitumen aging and surface wear, thereby helping to maintain the long-term waterproof performance and appearance stability of the membrane.

[0040] According to embodiments of this application, the reinforcing layer 4 may include at least one of long-fiber polyester base, glass fiber base, and glass fiber reinforced polyester base. By introducing long-fiber polyester base, glass fiber base, and / or glass fiber reinforced polyester base as reinforcing layer 4 into the self-healing exposed hot-adhesive modified bitumen waterproof membrane, the tensile strength and overall mechanical stability of the membrane can be significantly improved, while the dimensional retention ability of the membrane during laying and service is improved, which is beneficial to ensuring the long-term reliability of waterproof performance.

[0041] According to embodiments of this application, the isolation layer 7 may include at least one of polyethylene film, polypropylene film, polyethylene terephthalate film, polyamide / polypropylene co-extruded film, and polyamide / polyethylene co-extruded film. By providing the isolation layer 7 in the self-healing exposed hot-adhesive modified bitumen waterproof membrane, adhesion between the membrane and the construction substrate or adjacent layers can be effectively prevented, facilitating construction and laying. Simultaneously, the integrity of the self-healing waterproof adhesive and reinforcing layer 4 is protected during transportation, storage, and construction, thereby improving the overall ease of construction and service reliability of the membrane.

[0042] According to embodiments of this application, the thickness of the surface weather-resistant layer 1 is not particularly limited, as long as the purpose of this application is achieved. Those skilled in the art can select a suitable thickness based on the material of the surface weather-resistant layer 1. For example, when the surface weather-resistant layer 1 is a weather-resistant film, its thickness can be 0.02 mm to 0.05 mm. When the surface weather-resistant layer 1 is a weather-resistant particle layer, its thickness can be 0.4 mm to 0.8 mm. When the surface weather-resistant layer 1 is a weather-resistant coating, its thickness can be 0.1 mm to 0.2 mm.

[0043] According to the embodiments of this application, the thickness of the upper self-healing waterproof layer 2 can be 0.5mm to 2.0mm. For example, the thickness of the ground self-healing waterproof layer 2 can be 0.5mm, 0.7mm, 1mm, 1.3mm, 1.5mm, 1.8mm, 2.0mm or any two of the above values.

[0044] According to an embodiment of this application, the thickness of the photothermal sensing layer 3 is 0.1mm to 0.2mm. Exemplarily, the thickness of the photothermal sensing layer 3 can be 0.10mm, 0.12mm, 0.15mm, 0.18mm, 0.20mm or any two of the above values.

[0045] According to an embodiment of this application, the thickness of the reinforcing layer 4 is 0.9mm to 1.3mm. Exemplarily, the thickness of the reinforcing layer 4 can be 0.9mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm or any two of the above values.

[0046] According to the embodiments of this application, the thickness of the lower self-healing waterproof layer 5 is 0.5mm to 2.0mm. The thickness of the exemplary underground self-healing waterproof layer 5 can be 0.5mm, 0.7mm, 1mm, 1.3mm, 1.5mm, 1.8mm, 2.0mm or any two of the above values.

[0047] According to an embodiment of this application, the thickness of the isolation layer 7 is 25μm to 50μm. Exemplarily, the thickness of the isolation layer 7 can be any two values ​​between 25μm, 30μm, 35μm, 40μm, 50μm, or more.

[0048] By rationally setting the thickness of each layer of the self-healing exposed hot-adhesive modified bitumen waterproof membrane, the upper self-healing waterproof layer 2 and the lower self-healing waterproof layer 5 can effectively perform self-healing and waterproofing functions within the range of 0.5mm to 1.5mm. The thickness of the photothermal sensing layer 3, the reinforcing layer 4 and the isolation layer 7 can ensure the overall stability of the membrane and the convenience of construction, thereby realizing the synergistic effect of each functional layer during service and ensuring the long-term waterproof performance and self-healing efficiency of the membrane.

[0049] Figure 2 A schematic diagram of the structure of an exposed, highly weather-resistant, self-adhesive waterproof membrane according to another embodiment of this application is shown. Figure 2 As shown, a warning layer 6 is also included between the lower self-healing waterproof layer 5 and the isolation layer 7. The warning layer 6 includes a second self-adhesive coating and a pigment material. The thickness of the warning layer 6 can be 0.1mm to 0.2mm. For example, the thickness of the warning layer 6 can be 0.1mm, 0.13mm, 0.15mm, 0.18mm, 0.2mm, or any two of the above values. By setting a warning layer 6 including a second self-adhesive coating and a pigment material between the lower self-healing waterproof layer 5 and the isolation layer 7, and reasonably setting its thickness, it is possible to intuitively identify construction damage or local damage without affecting the overall structure and waterproof performance of the membrane. This facilitates the timely detection of potential risks and the implementation of repair measures, thereby improving the safety of the self-healing exposed hot-adhesive modified bitumen waterproof membrane.

[0050] According to embodiments of this application, the second self-adhesive coating includes at least one of acrylic emulsion adhesive coatings, polyurethane emulsion adhesive coatings, asphalt coatings, and epoxy emulsion adhesive coatings. By using the above substances as the second self-adhesive coating in the warning layer 6, stable adhesion between the warning layer 6 and adjacent structural layers can be ensured, and it can adapt to different construction environments and substrate conditions, thereby contributing to the integrity of the warning layer 6 and the reliable performance of its warning function during the service life of the roll material.

[0051] According to embodiments of this application, the pigment material includes at least one of inorganic pigments and organic pigments; exemplaryly, the inorganic pigments include at least one of titanium dioxide, iron oxide red, iron oxide yellow, nickel antimony titanium yellow, and titanium chromium brown; the organic pigments include at least one of phthalocyanine blue, phthalocyanine green, quinacridone red, and quinacridone violet. By introducing inorganic and / or organic pigments as pigment materials in the warning layer 6, a clear color contrast can be formed when the roll structure is abraded, punctured, or locally damaged, thereby enabling rapid identification and location of the damage location. This is beneficial for improving the monitoring efficiency of the waterproof system integrity during construction and maintenance, and ensuring the safety and reliability of the self-healing exposed hot-adhesive modified bitumen waterproof roll in use.

[0052] According to an embodiment of the second aspect of this application, a method for preparing the above-mentioned self-healing exposed heat-adhesive modified bitumen waterproof membrane is provided, comprising the following steps: uniformly mixing a second photothermal induction agent with a first self-adhesive coating and coating it onto the surface of a reinforcing layer to form a photothermal induction layer located on the surface of the reinforcing layer, thereby obtaining a first composite; applying a self-healing waterproof adhesive to the upper and lower surfaces of the first composite, thereby obtaining a second composite; covering the upper and lower surfaces of the second composite with a surface weather-resistant layer and an isolation layer, respectively, thereby obtaining a third composite; and sequentially cooling, trimming, and rolling the third composite to obtain a self-healing exposed heat-adhesive modified bitumen waterproof membrane, thereby ensuring the synergistic effect of the membrane's structural stability, waterproof performance, and self-healing function during long-term service.

[0053] The second photothermal induction agent, the first self-adhesive coating, the reinforcing layer, the self-healing waterproof adhesive, the isolation layer, and the surface weather-resistant layer are the same as described above, and will not be repeated here.

[0054] According to embodiments of this application, a method for preparing a self-healing waterproof adhesive may include: mixing asphalt, a first photothermal sensor, a microcapsule self-healing agent, and a dynamic chemical self-healing agent to obtain a self-healing waterproof adhesive. The asphalt, the first photothermal sensor, the microcapsule self-healing agent, and the dynamic chemical self-healing agent are the same as described above and will not be repeated here.

[0055] In some embodiments of this application, mixing asphalt, a first photothermal sensor, a microcapsule self-healing agent, and a dynamic chemical self-healing agent to obtain a self-healing waterproof adhesive may include: heating the asphalt to 180°C~200°C to melt it, adding the first photothermal sensor, and stirring for 20min~40min to obtain a first mixture; cooling the first mixture to 160°C~170°C, adding the microcapsule self-healing agent and the dynamic chemical self-healing agent, and stirring for 30min~60min to obtain a self-healing waterproof adhesive.

[0056] In some embodiments of this application, before adding the first photothermal induction agent, the process may further include: adding at least one of thermoplastic elastomer, thermoplastic plastic, filler, and flame retardant to the molten asphalt, and stirring and mixing.

[0057] For example, asphalt can be heated to 140°C to melt; thermoplastic elastomer styrene-butadiene-styrene block copolymer (SBS), ammonium polyphosphate (APP), thermoplastic amorphous alpha olefin copolymer (APAO), and tackifying resin can be added and ground at 180~200°C for 1 hour; near-infrared photothermal conversion material can be added and stirred slowly for 30 minutes; filler can be added while cooling and stirring for 1 hour; the temperature can be controlled at 160°C, and dynamic chemical self-healing agent and microcapsule self-healing agent can be added and stirred at low speed for 30 minutes to disperse them evenly, thus obtaining a self-healing waterproof adhesive.

[0058] This application also provides the application of self-healing exposed heat-adhesive modified bitumen waterproof membranes in building waterproofing construction. Self-healing exposed heat-adhesive modified bitumen waterproof membranes can be directly applied to building waterproofing construction, including roof waterproofing, basement waterproofing, bridge waterproofing, and other engineering projects requiring waterproofing and sealing.

[0059] The present application will now be described in detail with reference to embodiments to facilitate understanding by those skilled in the art. It is important to note that the embodiments are merely illustrative and should not be construed as limiting the scope of protection of the present application. Non-essential improvements and adjustments made to the present application by those skilled in the art based on the above description should still fall within the scope of protection of the present application. Furthermore, any raw materials mentioned below that are not described in detail are commercially available products; any process steps or preparation methods not mentioned in detail are process steps or preparation methods known to those skilled in the art. All raw materials described in this application are obtained commercially, and all materials used in this application are commonly used raw materials in the art.

[0060] The following are the key raw materials and specifications used in the preparation of self-healing exposed heat-adhesive modified bitumen waterproof membranes:

[0061] Microcapsule self-healing agent: The wall material is urea-formaldehyde resin, melamine resin or polyurethane, and the core material is hydrogenated rosin glycerol ester, naphthenic oil or special asphalt regenerator.

[0062] Dynamic chemical self-healing agent: using a self-healing polyurethane prepolymer containing disulfide bonds (polyurethane containing disulfide bonds).

[0063] Near-infrared photothermal conversion material: tungsten bronze ( Nanoparticles with a particle size of 30-50 nm and a near-infrared absorption rate of >95%.

[0064] Reinforcing material: Polyester base fabric, 180~250g / cm² 3 .

[0065] Self-adhesive coatings: These are curable acrylic emulsion adhesive coatings.

[0066] Pigment material: Phthalocyanine Green PG7 color paste.

[0067] Surface weather-resistant layer: fluorocarbon film.

[0068] Separation layer: PE release film.

[0069] 70# Asphalt: CNOOC 70# road petroleum asphalt, softening point 45~55℃.

[0070] 200# Asphalt: Waterproof 200# asphalt, softening point 18~28℃.

[0071] Thermoplastic elastomers: SBS3411 and SBR1901.

[0072] Tackifying resin: C9 hydrogenated petroleum resin.

[0073] Polyolefin modifier: APAO.

[0074] Filler: 200 mesh talc powder.

[0075] Example 1

[0076] This embodiment provides a self-healing exposed heat-adhesive modified bitumen waterproof membrane, the preparation method of which is as follows.

[0077] (1) Preparation of self-healing modified asphalt compound (by mass)

[0078] 1) Heat 35 parts of 70# asphalt and 15 parts of 200# asphalt to 140℃ until completely melted.

[0079] 2) Add 4 parts SBS, 5 parts SBR, 2 parts APAO and 4 parts tackifying resin, and grind and stir at 180~200℃ for 1 hour to allow the components to fully swell and mix.

[0080] 3) Add 2 parts of near-infrared photothermal conversion material and stir slowly for 30 minutes to ensure uniform dispersion.

[0081] 4) While adding 20 parts of filler, cool and stir for 1 hour. Then, control the temperature at 160℃, add 2 parts of microcapsule self-healing agent (wall material is urea-formaldehyde resin, core material is hydrogenated rosin glycerol ester) and 1 part of dynamic chemical self-healing agent, and stir at low speed for 30 minutes to obtain a uniform self-healing modified asphalt compound.

[0082] By weight, the self-healing modified bitumen compound contains 35 parts of 70# bitumen, 15 parts of 200# bitumen, 4 parts of SBS, 5 parts of SBR, 2 parts of APAO, 4 parts of tackifying resin, 2 parts of microcapsule self-healing agent, 1 part of dynamic chemical self-healing agent, 2 parts of photothermal conversion material, and 20 parts of filler.

[0083] (2) Preparation of photothermal sensing layer

[0084] Four parts of near-infrared photothermal conversion material and 100 parts of acrylic emulsion adhesive coating are ultrasonically mixed for 20 minutes. After mixing, the mixture is evenly coated on the surface of the reinforcing material and rapidly cured at 120°C to form a photothermal sensing layer. The two form the first composite.

[0085] (3) Preparation of warning layer-isolation layer

[0086] Three parts of phthalocyanine green paste and 100 parts of acrylic emulsion adhesive are ultrasonically mixed for 20 minutes. The mixture is then evenly applied to the surface of the isolation material and rapidly cured at 120°C to form a warning layer and an isolation layer.

[0087] (4) Composite molding self-healing exposed hot-adhesive modified bitumen waterproof membrane

[0088] 1) The above-mentioned self-healing modified asphalt adhesive is uniformly coated on the upper and lower surfaces of the first composite to obtain the second composite, wherein the total thickness can be controlled to be 3~5mm as needed.

[0089] 2) Cover the surface of the second composite with a weather-resistant layer and compact it with a pressure roller to form a surface weather-resistant layer.

[0090] 3) Cover the lower surface of the second composite with a warning layer-isolation layer.

[0091] 4) After cooling, trimming, thickness measurement, and winding, the final finished roll material is obtained.

[0092] Example 2

[0093] This embodiment provides a method for preparing a self-healing, exposed, heat-adhesive modified bitumen waterproof membrane. Referring to Embodiment 1, the difference lies in that:

[0094] In step (1), the mass fraction of the self-healing modified asphalt binder is as follows:

[0095] Self-healing modified asphalt layer: 20 parts of 70# asphalt, 25 parts of 200# asphalt, 6 parts of SBS, 5 parts of SBR, 4 parts of APAO, 2 parts of tackifying resin, 2 parts of microcapsule self-healing agent (wall material is melamine resin, core material is naphthenic oil), 2 parts of dynamic chemical self-healing agent, 1 part of near-infrared photothermal conversion material, and 30 parts of filler.

[0096] In step (2), the photothermal sensing layer consists of 3 parts of near-infrared photothermal conversion material and 100 parts of polyurethane emulsion adhesive coating.

[0097] In step (3), the warning layer consists of 2 parts of phthalocyanine green paste and 100 parts of polyurethane emulsion adhesive coating.

[0098] Example 3

[0099] This embodiment provides a method for preparing a self-healing, exposed, heat-adhesive modified bitumen waterproof membrane. Referring to Embodiment 1, the difference lies in that:

[0100] In step (1), the mass fraction of the materials used in the preparation of the self-healing exposed hot-adhesive modified bitumen waterproof membrane is as follows:

[0101] Self-healing modified asphalt layer: 25 parts of 70# asphalt, 20 parts of 200# asphalt, 5 parts of SBS, 4 parts of SBR, 3 parts of APAO, 3 parts of tackifying resin, 4 parts of microcapsule self-healing agent (wall material is polyurethane, core material is special asphalt recycling agent), 2 parts of dynamic chemical self-healing agent, 2 parts of near-infrared photothermal conversion material, and 25 parts of filler.

[0102] In step (2), the photothermal sensing layer consists of 3 parts of near-infrared photothermal conversion material and 100 parts of asphalt-based adhesive coating.

[0103] In step (3), the warning layer consists of 2 parts of phthalocyanine green paste and 100 parts of asphalt-based adhesive coating.

[0104] Example 4

[0105] This embodiment provides a method for preparing a self-healing, exposed, heat-adhesive modified bitumen waterproof membrane. Referring to Embodiment 1, the difference lies in that:

[0106] In step (1), the mass fraction of the materials used in the preparation of the self-healing exposed hot-adhesive modified bitumen waterproof membrane is as follows:

[0107] Self-healing modified asphalt layer: 24 parts of 70# asphalt, 23 parts of 200# asphalt, 5 parts of SBS, 4 parts of SBR, 3 parts of APAO, 2 parts of tackifying resin, 1 part of dynamic chemical self-healing agent, 1 part of near-infrared photothermal conversion material, and 27 parts of filler.

[0108] In step (2), the photothermal sensing layer consists of 3 parts of near-infrared photothermal conversion material and 100 parts of acrylic emulsion adhesive coating.

[0109] In step (3), the warning layer consists of 2 parts of phthalocyanine green paste and 100 parts of acrylic emulsion adhesive coating.

[0110] Example 5

[0111] This comparative example provides a method for preparing a self-healing, exposed, heat-adhesive modified bitumen waterproof membrane. The difference from Example 1 is that:

[0112] No warning layer was set in this comparative example.

[0113] In step (1), the mass fractions of other preparation materials are as follows:

[0114] Self-healing modified asphalt layer: 20 parts of 70# asphalt, 25 parts of 200# asphalt, 6 parts of SBS, 5 parts of SBR, 4 parts of APAO, 2 parts of tackifying resin, 2 parts of microcapsule self-healing agent, 2 parts of dynamic chemical self-healing agent, 1 part of near-infrared photothermal conversion material, and 30 parts of filler.

[0115] In step (2), the photothermal sensing layer consists of 3 parts of near-infrared photothermal conversion material and 100 parts of polyurethane emulsion adhesive coating.

[0116] Comparative Example 1

[0117] This comparative example provides a method for preparing a self-healing exposed heat-adhesive modified bitumen waterproof membrane. Referring to Example 1, the difference lies in that:

[0118] In step (1), the mass fraction of the materials used to prepare the self-healing exposed hot-adhesive modified bitumen waterproof membrane is as follows: self-healing modified bitumen layer: 35 parts of 70# bitumen, 15 parts of 200# bitumen, 4 parts of SBS, 5 parts of SBR, 2 parts of APAO, 4 parts of tackifying resin, 2 parts of microcapsule self-healing agent, 1 part of dynamic chemical self-healing agent, and 20 parts of filler, excluding near-infrared photothermal conversion materials.

[0119] In step (2), the photothermal sensing layer includes 100 parts of acrylic emulsion adhesive coating, but does not include near-infrared photothermal conversion material.

[0120] Comparative Example 2

[0121] This comparative example provides a method for preparing a self-healing exposed heat-adhesive modified bitumen waterproof membrane. Referring to Example 1, the difference lies in that:

[0122] In step (1), no dynamic chemical self-healing agent was introduced into the self-healing modified asphalt layer. The mass fraction of other preparation materials is as follows: self-healing modified asphalt layer: 25 parts of 70# asphalt, 20 parts of 200# asphalt, 5 parts of SBS, 4 parts of SBR, 3 parts of APAO, 3 parts of tackifying resin, 4 parts of microcapsule self-healing agent, 2 parts of near-infrared photothermal conversion material, and 25 parts of filler.

[0123] Comparative Example 3

[0124] This comparative example provides a method for preparing a self-healing exposed heat-adhesive modified bitumen waterproof membrane. Referring to Example 1, the difference lies in that:

[0125] In step (1), no microcapsule repair agent was introduced into the self-healing modified asphalt layer. The mass fraction of other preparation materials is as follows: 24 parts of 70# asphalt, 23 parts of 200# asphalt, 5 parts of SBS, 4 parts of SBR, 3 parts of APAO, 2 parts of tackifying resin, 1 part of dynamic chemical self-healing agent, 1 part of near-infrared photothermal conversion material, and 27 parts of filler.

[0126] Self-healing performance evaluation

[0127] The testing method is as follows: Select a sample of the waterproof membrane to be tested, and prepare a penetrating puncture damage with a diameter of approximately 3 mm on the sample surface. Then, divide the damaged samples into two groups for comparative testing.

[0128] Group A (simulated sunlight conditions): The samples were placed in a xenon lamp aging chamber with an irradiation intensity of 800 W / m² to simulate midday sunlight conditions in summer. The chamber temperature was controlled at 35°C to simulate the ambient temperature of the roof.

[0129] Group B (simulated shade conditions): The samples were placed in a constant temperature chamber, and the chamber temperature was maintained at 35°C under no light conditions to simulate the usage conditions of no sunlight but with the same ambient temperature.

[0130] The samples were subjected to constant treatment under the above conditions to compare the self-healing behavior of the damaged areas of the samples under different environmental conditions. The test results are shown in Table 1 below.

[0131] Table 1

[0132]

[0133] As shown in Comparative Example 1, without the introduction of a photothermal conversion agent, the self-healing behavior of the samples under both illuminated and non-illuminated conditions showed no significant difference. The self-healing process relied entirely on the rearrangement of dynamic chemical bonds, resulting in extremely low repair efficiency and a self-healing time as long as 168 hours, which is insufficient to meet the practical requirements of rapid restoration of sealing in roof waterproofing. This indicates that relying solely on chemical self-healing mechanisms is insufficient to achieve efficient repair in the actual service environment of exposed waterproof membranes.

[0134] In contrast, this application introduces an energy management strategy of "overall reflective insulation - local photothermal conversion" into the overall structure. While maintaining the overall low temperature of the roll material and delaying aging, it creates localized high-temperature zones only at the damaged areas, thereby significantly improving the self-healing rate. The comparative results show that this application achieves improved self-healing efficiency without sacrificing weather resistance, fundamentally resolving this inherent paradox in the industry.

[0135] As can be seen from Comparative Example 2, in the absence of dynamic chemical self-healing agents, even under light conditions, the self-healing process is still extremely slow, relying solely on the fluidity of asphalt under localized heating and the release of microcapsule repair agents, making it difficult to form a long-term stable repair structure. This indicates that relying solely on physical flow or a one-time repair mechanism cannot achieve effective repair of deep damage.

[0136] Comparative Example 3 further demonstrates that, in the absence of microcapsule repair agents, although the system still possesses chemical self-healing capabilities, it cannot achieve rapid initial closure after damage occurs, delaying the self-healing initiation time and extending the overall repair time to over 3 hours. This proves the important role of microcapsule repair agents in early and rapid repair.

[0137] Furthermore, in Example 5, since no warning layer was set, the self-healing ability itself did not change significantly, but it was impossible to quickly locate damage or potential leakage points in terms of appearance, which increased the difficulty of inspection and maintenance and reduced the manageability and safety of the waterproof system in actual projects.

[0138] The results indicate that the synergistic system of "microcapsule rapid physical repair - photothermal triggering - dynamic chemical bond repair - warning layer visualization early warning" proposed in this application is not a simple functional superposition, but plays an irreplaceable technical role at different stages of damage, thereby achieving an overall improvement in the self-healing efficiency, repair reliability and engineering maintainability of exposed waterproof membranes.

[0139] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A self-healing, exposed, heat-adhesive modified bitumen waterproof membrane, characterized in that, The self-healing exposed hot-adhesive modified bitumen waterproof membrane comprises, from top to bottom: a surface weather-resistant layer, an upper self-healing waterproof layer, a photothermal sensing layer, a reinforcing layer, a lower self-healing waterproof layer, and an isolation layer; The upper self-healing waterproof layer and / or the lower self-healing waterproof layer each independently include a self-healing waterproof adhesive, which includes asphalt, a first photothermal induction agent, a microcapsule self-healing agent, and a dynamic chemical self-healing agent. The wall material of the microcapsule self-healing agent is at least one of urea-formaldehyde resin, melamine resin, and polyurethane, and the core material is at least one of hydrogenated rosin glycerol ester, naphthenic oil, and asphalt rejuvenator. The dynamic chemical self-healing agent includes at least one of polymers containing disulfide bonds and polymers containing diselenide bonds; The photothermal sensing layer includes a first self-adhesive coating and a second photothermal sensing agent; The first photothermal sensor and the second photothermal sensor each independently comprise a near-infrared photothermal conversion material.

2. The self-healing exposed heat-adhesive modified bitumen waterproof membrane according to claim 1, characterized in that, The near-infrared photothermal conversion material includes at least one of carbon-based nanomaterials, transition metal carbide nanomaterials, transition metal nitride nanomaterials, and semiconductor nanomaterials; preferably, the carbon-based nanomaterials include at least one of carbon nanotubes, graphene, and nano-carbon black; the transition metal carbide nanomaterials include at least one of titanium carbide nanomaterials and niobium carbide nanomaterials; the transition metal nitride nanomaterials include at least one of titanium nitride nanomaterials, vanadium nitride nanomaterials, and tungsten nitride nanomaterials; and the semiconductor nanomaterials include at least one of copper sulfide nanoparticles and tungsten bronze nanoparticles. The disulfide-containing polymer includes at least one of disulfide-containing polyurethane and disulfide-containing polyurea-polyurethane. The polymer containing diselenide bonds includes at least one of polyurethane containing diselenide bonds and polyurea-polyurethane containing diselenide bonds; The first self-adhesive coating includes at least one of acrylic emulsion adhesive coatings, polyurethane emulsion adhesive coatings, asphalt coatings, and epoxy emulsion adhesive coatings.

3. The self-healing exposed heat-adhesive modified bitumen waterproof membrane according to claim 1, characterized in that, In the self-healing waterproof adhesive, the asphalt includes 70# asphalt and 200# asphalt, the mass fraction of 70# asphalt is 20 to 35 parts, the mass fraction of 200# asphalt is 15 to 25 parts, the mass fraction of the first photothermal sensor is 1 to 2 parts, the mass fraction of the microcapsule self-healing agent is 2 to 4 parts, and the mass fraction of the dynamic chemical self-healing agent is 1 to 2 parts.

4. The self-healing exposed heat-adhesive modified bitumen waterproof membrane according to claim 1, characterized in that, The self-healing waterproof adhesive also includes at least one of thermoplastic elastomer, thermoplastic plastic, and filler; Preferably, the thermoplastic elastomer includes a star-shaped elastomer and a linear elastomer. When the self-healing waterproof adhesive includes a thermoplastic elastomer, the star-shaped elastomer has a mass fraction of 4 to 6 parts, and the linear elastomer has a mass fraction of 4 to 5 parts. Preferably, when the self-healing waterproof adhesive includes a thermoplastic body, the thermoplastic body is 2 to 4 parts by weight. Preferably, when the self-healing waterproof adhesive includes a filler, the filler is 20 to 30 parts by weight.

5. The self-healing exposed heat-adhesive modified bitumen waterproof membrane according to claim 4, characterized in that, The thermoplastic elastomer includes at least one of styrene-butadiene-styrene thermoplastic elastomer and styrene-isoprene-styrene thermoplastic elastomer; The thermoplastic material includes at least one of amorphous α-olefin copolymer, low-density polyethylene, ethylene-vinyl acetate copolymer, and ethylene-acrylate copolymer; The filler includes at least one of calcium carbonate, precipitated calcium carbonate, and light calcium carbonate.

6. The self-healing exposed heat-adhesive modified bitumen waterproof membrane according to claim 1, characterized in that, The surface weather-resistant layer includes at least one of a weather-resistant particle layer, a weather-resistant coating, and a weather-resistant film; The reinforcing layer includes at least one of long-fiber polyester base, glass fiber base, and glass fiber reinforced polyester base; The isolation layer includes at least one of polyethylene film, polypropylene film, polyethylene terephthalate film, polyamide / polypropylene co-extruded film, and polyamide / polyethylene co-extruded film.

7. The self-healing exposed heat-adhesive modified bitumen waterproof membrane according to claim 1, characterized in that, The thickness of the self-healing waterproof layer is 0.5mm to 2.0mm; The thickness of the photothermal sensing layer is 0.1~0.2mm; The thickness of the reinforcing layer is 0.9 mm to 1.3 mm; The thickness of the lower self-healing waterproof layer is 0.5mm~2.0mm; The thickness of the isolation layer is 25μm~50μm.

8. The self-healing exposed heat-adhesive modified bitumen waterproof membrane according to any one of claims 1 to 7, characterized in that, An alarm layer is also included between the lower self-healing waterproof layer and the isolation layer; The warning layer includes a second self-adhesive coating and a pigment material; The thickness of the warning layer is 0.1mm to 0.2mm.

9. The self-healing exposed hot-adhesive modified bitumen waterproof membrane according to claim 8, characterized in that, The second self-adhesive coating includes at least one of acrylic emulsion adhesive coatings, polyurethane emulsion adhesive coatings, asphalt coatings, and epoxy emulsion adhesive coatings; The pigment material includes at least one of inorganic pigments and organic pigments; preferably, the inorganic pigment includes at least one of titanium dioxide, iron oxide red, iron oxide yellow, nickel antimony titanium yellow, and titanium chromium brown; the organic pigment includes at least one of phthalocyanine blue, phthalocyanine green, quinacridone red, and quinacridone violet.

10. The application of any one of the self-healing exposed hot-adhesive modified bitumen waterproof membranes according to claims 1 to 9 in building waterproofing construction.

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