Self-healing non-cured modified asphalt waterproofing membrane and its application

Abstract

This application provides a self-healing non-curing modified bitumen waterproof membrane and its application, belonging to the field of building waterproofing technology. The self-healing non-curing modified bitumen includes: bitumen, liquid tackifying resin, thermoplastic elastomer, filler, and microcapsule self-healing agent. The microcapsule self-healing agent includes a wall material, a core material, and an adsorbent carrier mixed in the wall material for adsorbing the core material. In the microcapsule self-healing agent, the wall material includes paraffin wax, the core material includes epoxy resin, a curing agent and an accelerator, and the adsorbent carrier includes at least one of sodium bentonite, calcium bentonite, and diatomaceous earth.

Description

Technical Field

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

[0002] Waterproof membranes are widely used in building waterproofing fields such as underground engineering and roofing engineering. Different types of materials differ in terms of substrate adhesion, water-proofing performance at overlapping edges, construction adaptability, and long-term stability.

[0003] In related technologies, asphalt waterproof membranes mainly fall into the following categories: One category is a membrane system based on modified bitumen materials. By adjusting the material composition, the flexibility, adhesion, and heat resistance of the membrane are improved. However, it still has certain shortcomings in terms of full adhesion, water penetration prevention, and performance retention after damage. In addition, in actual use, it suffers from problems such as poor adhesion to the substrate, inability to achieve full adhesion, easy water penetration, and poor self-healing properties. The other category is a waterproof system based on non-curing waterproof materials. It utilizes the fluidity and creep properties of the material to improve the adhesion to the substrate. Although it has a certain degree of creep and self-healing properties, it still suffers from problems such as easy deformation during storage and easy damage during construction, which affects the actual application performance of the waterproof membrane. Summary of the Invention

[0004] In view of this, this application provides a self-healing, non-curing modified bitumen waterproof membrane and its application.

[0005] According to one embodiment of this application, a self-healing non-curing modified asphalt is provided, comprising: asphalt, liquid tackifying resin, thermoplastic elastomer, filler, and microcapsule self-healing agent; wherein the microcapsule self-healing agent comprises a wall material, a core material, and an adsorbent carrier incorporated in the wall material for adsorbing the core material. In the microcapsule self-healing agent, the wall material comprises paraffin wax, the core material comprises epoxy resin, a curing agent, and an accelerator, and the adsorbent carrier comprises at least one selected from sodium bentonite, calcium bentonite, and diatomaceous earth.

[0006] According to another embodiment of this application, a self-healing non-curing modified bitumen waterproof membrane is provided, comprising, from top to bottom: an upper protective layer, an upper bitumen coating layer, an intermediate reinforcing layer, a lower bitumen coating layer, a non-curing modified bitumen layer, and a lower protective layer; wherein the non-curing modified bitumen layer is made of the aforementioned self-healing non-curing modified bitumen.

[0007] According to another embodiment of this application, a method for preparing the above-mentioned self-healing non-curing modified bitumen waterproof membrane is provided, comprising:

[0008] The asphalt coating material is applied to the upper and lower surfaces of the intermediate reinforcement layer to form an upper asphalt coating layer and a lower asphalt coating layer.

[0009] A protective layer is applied to the surface of the asphalt coating layer and then cooled for the first time.

[0010] A non-curing modified asphalt layer is coated on the surface of the underlying asphalt overlay layer;

[0011] A protective layer is applied to the surface of the uncured modified asphalt layer, followed by a second cooling process.

[0012] After being pulled, stored, rolled, cut and packaged, a self-healing non-curing modified bitumen waterproof membrane is obtained.

[0013] According to another embodiment of this application, the application of the above-mentioned self-healing non-curing modified bitumen waterproof membrane in building waterproofing construction is provided.

[0014] In some embodiments of this application, the self-healing non-curing modified asphalt is based on asphalt. By introducing liquid tackifying resin and adsorbent carrier, the system has a more stable interfacial adhesion ability during construction and paving and contact with the substrate, thereby helping to form a continuous and bonded interfacial structure. At the same time, microcapsule self-healing agents are introduced into the system, so that when the material is locally damaged, its components can be released and cured by water vapor, thereby repairing the damaged area and maintaining the continuity of the local structure and the integrity of the overall waterproofing system.

[0015] In some embodiments of this application, by adding microcapsule self-healing agents and modified bitumen coatings to the membrane system, the interfacial adhesion between the membrane and the substrate can be improved, as well as the water tightness, self-healing properties, heat resistance, and water resistance after membrane construction. Specifically, the non-curing modified bitumen layer forms a low-viscosity state upon heating, filling gaps and uneven areas in the substrate, thereby improving the full adhesion between the membrane and the substrate. Simultaneously, the top bitumen coating layer maintains the overall structural strength of the membrane, ensuring good structural stability during construction and use. This results in a composite waterproof structure that balances interfacial adhesion and structural support, reducing problems associated with traditional membranes such as water leakage, insufficient self-healing, and deformation during storage of non-curing membranes.

[0016] In some embodiments of this application, asphalt coating material is applied to the upper and lower surfaces of the intermediate reinforcing layer to form an upper asphalt coating layer and a lower asphalt coating layer. By applying an upper protective layer to the surface of the upper asphalt coating layer and subjecting it to a first cooling process, the upper asphalt coating layer forms a relatively stable surface structure during the molding process, reducing the possibility of interlayer adhesion or surface deformation during subsequent processing. By applying a non-curing modified asphalt layer to the surface of the lower asphalt coating layer, the lower part of the roll material can form a function with a certain degree of flow adaptability, thereby helping to improve the continuity of the roll material bonding surface. By applying an lower protective layer to the surface of the non-curing modified asphalt layer and subjecting it to a second cooling process, the non-curing modified asphalt layer maintains a relatively stable layered structure after molding, thereby reducing adhesion and deformation of the roll material during subsequent traction, storage, and winding, and maintaining the integrity of the overall structure and construction adaptability of the roll material. After traction, storage, winding, cutting, and packaging processes, the roll material can maintain the integrity of its layered structure after molding, thereby meeting the usage requirements of the roll material.

[0017] In some embodiments of this application, the aforementioned self-healing, non-curing modified bitumen waterproof membrane is used in building waterproofing construction. Through a multi-layered structure consisting of an upper protective layer, an upper bitumen coating layer, an intermediate reinforcing layer, a lower bitumen coating layer, a non-curing modified bitumen layer, and a lower protective layer, the membrane can simultaneously ensure structural stability and continuous adhesion to the substrate during building waterproofing construction, thereby meeting the application requirements of waterproofing construction. Attached Figure Description

[0018] 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:

[0019] Figure 1 A schematic diagram of the structure of the self-healing, non-curing modified bitumen waterproof membrane provided in the embodiments of this application is shown.

[0020] [Explanation of Labels in the Attached Image]

[0021] 1- Upper protective layer;

[0022] 2- Apply asphalt coating layer;

[0023] 3-Intermediate reinforcement layer;

[0024] 4- Lower asphalt coating layer;

[0025] 5-Non-curing modified asphalt layer;

[0026] 6- Lower protective layer. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] 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.).

[0030] In related technologies, conventional modified bitumen waterproof membranes and non-curing waterproof materials have the following limitations in the application of building waterproofing construction: (1) The bonding state with the base layer is prone to discontinuity in complex construction environments, resulting in insufficient integrity of the overall waterproof layer interface and easy water seepage. (2) The substrate needs to be pre-impregnated to improve its wetting and bonding performance with the bitumen material, but the process conditions are highly controlled. In the case of uneven pre-impregnation or insufficient interface bonding, the interlayer bonding is prone to instability in subsequent processing or use, resulting in material delamination. (3) During long-term storage, the material may undergo morphological changes due to its own creep or insufficient structural support. At the same time, under construction or external force conditions, the surface or internal structure of the membrane is easily damaged by mechanical damage, affecting the overall integrity of the material and the stability of construction and use. (4) After the material is damaged by external force, it lacks self-healing ability and it is difficult to effectively repair cracks or local damage during use, resulting in the damage persisting and possibly expanding further, affecting the integrity of the overall structure and waterproof performance.

[0031] In the process of realizing this application, it was discovered that by compounding asphalt, liquid tackifying resin, thermoplastic elastomer, filler and microcapsule self-healing agent, the material can maintain its construction adaptability while having a certain ability to repair the structure after damage, thereby providing a self-healing non-curing modified asphalt waterproof material system that has both the function of continuous adhesion to the base layer and the function of repairing local damage.

[0032] In view of this, an embodiment of the first aspect of this application provides a self-healing, non-curing modified asphalt, comprising: asphalt, liquid tackifying resin, thermoplastic elastomer, filler, and microcapsule self-healing agent. The microcapsule self-healing agent includes a wall material, a core material, and an adsorbent carrier incorporated in the wall material for adsorbing the core material. In the microcapsule self-healing agent, the wall material includes paraffin wax, the core material includes epoxy resin, a curing agent, and an accelerator, and the adsorbent carrier includes at least one selected from sodium bentonite, calcium bentonite, and diatomaceous earth.

[0033] According to embodiments of this application, through the synergistic arrangement of the above components, the asphalt system can maintain the construction adaptability of conventional non-curing materials while possessing a certain degree of structural stability and self-healing ability after damage. The combination of liquid tackifying resin and asphalt helps improve the adhesion state of the system during construction, forming a relatively continuous contact interface when laid on the base layer. Thermoplastic elastomers help maintain the flexibility and morphological stability of the material under temperature changes and stress conditions. The introduction of fillers plays a filling and regulating role in the internal structure of the system, making the material structure more uniform. The microcapsule self-healing agent allows the material to solidify its components through the release of internal components and the action of moisture when local damage occurs, thereby repairing the damaged area and maintaining the continuity of the local structure and the integrity of the overall waterproofing system.

[0034] According to the embodiments of this application, the raw materials of the microcapsule self-healing agent, based on a mass percentage of 100%, include: paraffin wax 20%~30%, curing agent 10%~20%, accelerator 1%~2%, epoxy resin 10%~20%, and adsorbent carrier agent 40%~55%.

[0035] For example, the wall material of microcapsule self-healing agents is paraffin wax, which can have a melting point of 55℃ and a density of 0.9 g / cm³. 3 The percentage can be 20% to 30%, for example, 20%, 22%, 24%, 26%, 28%, 30%, or any two of the above values. The core material is epoxy resin, and the percentage can be 10% to 20%, for example, 10%, 12%, 14%, 16%, 18%, 20%, or any two of the above values.

[0036] The curing agent can be dicyandiamide (DICY), and the proportion can be 10% to 20%, for example, the proportion can be 10%, 12%, 14%, 16%, 18%, 20% or any two of the above values.

[0037] The accelerator can be 2-methylimidazole, and its proportion can be 1% to 2%, for example, it can be 1%, 1.2%, 1.4%, 1.6%, 1.8%, 2% or any two of the above values.

[0038] The adsorbent carrier can be sodium bentonite, with a blue adsorption capacity of 43.0 g / 100 g, a water absorption rate of >400.0%, a moisture content of <8.0%, a particle size of 600 mesh, and a proportion of 40% to 55%, for example, 40%, 42%, 44%, 46%, 48%, 50%, 52%, 54%, 55%, or any two of the above values.

[0039] By adjusting the proportions of the above components, the dispersion and stability of the microcapsule structure can be improved, thereby enabling it to achieve better repair function when the roll material is damaged.

[0040] According to an embodiment of this application, the microcapsule self-healing agent is prepared by the following method: paraffin wax and an adsorbent carrier are heated and melted to form a mixed system, a curing agent, an accelerator and an epoxy resin are added to the mixed system, and the microcapsule self-healing agent is obtained after cooling, filtration, washing and drying.

[0041] In this application, the melt mixing process enables paraffin wax and the adsorbent carrier to form a continuous and uniform mixed system, creating an environment that encapsulates and supports the core material; the introduction of epoxy resin, curing agent, and accelerator as core material raw materials allows the adsorbent carrier to form a dispersed loading state in the paraffin wax mixture system; the cooling process transforms the paraffin wax from a molten state to a solid structure, thereby achieving the stable formation of the microcapsule structure; further, washing and drying processes are used to obtain a microcapsule self-healing agent with a relatively stable morphology.

[0042] According to embodiments of this application, the self-healing non-curing modified asphalt comprises, by weight percentage (100%): 50% to 60% asphalt, 10% to 15% liquid tackifying resin, 6% to 12% thermoplastic elastomer, 15% to 25% filler, and 4% to 8% microcapsule self-healing agent.

[0043] For example, the asphalt is selected from at least one of 70#, 90#, 180#, and 200#, and the proportion of asphalt can be 50%, 52%, 54%, 56%, 58%, 60%, or any two of the above values.

[0044] The liquid tackifying resin is selected from at least one of terpene resin, rosin glycerol ester, and petroleum resin, and its proportion can be 10%, 11%, 12%, 13%, 14%, 15%, or any two of the above values.

[0045] When the thermoplastic elastomer is selected from at least one of polystyrene-isoprene copolymer, isoprene-butadiene diblock copolymer or isoprene-butadiene-isoprene triblock copolymer, its proportion can be 6%, 7%, 8%, 9%, 10%, 11%, 12% or any two of the above values.

[0046] When the filler is at least one of fly ash, desulfurization ash, denitrification ash, and floating black ash, its proportion can be 15%, 17%, 19%, 21%, 23%, 25%, or any two of the above values.

[0047] The proportion of microcapsule self-healing agent can be 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, or any two of the above values. When the roll material made of self-healing non-curing modified bitumen is locally damaged, it can release the repair components to fill and compensate the damaged area, restore the continuity of the locally damaged area, and thus improve the structural maintenance capability of the roll material during long-term service.

[0048] According to the embodiments of this application, the preparation method of self-healing non-curing modified asphalt includes: heating the asphalt to 160~170°C, adding liquid tackifying resin, thermoplastic elastomer (such as polystyrene-butadiene copolymer, isoprene-butadiene block copolymer), and filler, stirring evenly, cooling to 120°C, and then adding microcapsule self-healing agent to obtain self-healing non-curing modified asphalt.

[0049] Figure 1 A structural diagram of the self-healing, non-curing modified bitumen waterproof membrane of this application is shown. According to another aspect of this application, a self-healing, non-curing modified bitumen waterproof membrane is provided, the structure of which is as follows... Figure 1 As shown, the self-healing non-curing modified bitumen waterproof membrane includes, from top to bottom, an upper protective layer 1, an upper bitumen coating layer 2, an intermediate reinforcing layer 3, a lower bitumen coating layer 4, a non-curing modified bitumen layer 5, and a lower protective layer 6.

[0050] In this application, the upper protective layer 1 and the lower protective layer 6 are used to form an isolation and protection for the outer surface of the roll material, so that the roll material maintains its structural integrity during transportation and construction; the upper asphalt coating layer 2 and the lower asphalt coating layer 4 are used to form a continuous coating structure between the layers, so that the roll material as a whole has a continuous interface connection foundation; the intermediate reinforcing layer 3 is used to provide support and reinforcement for the overall structure of the roll material, so that the roll material maintains its overall stability under stress conditions, thereby reducing the risk of structural damage caused by external forces; the non-curing modified asphalt layer 5 is used to provide a certain degree of adhesion and adaptability during construction and laying, so that the roll material forms a continuous interface during contact with the base layer, and achieves self-healing in the event of local damage, thereby helping to improve the overall structural retention capacity and service stability of the waterproof layer.

[0051] According to the embodiments of this application, the upper asphalt coating layer and the lower asphalt coating layer are made of asphalt coating material. The asphalt coating material includes, by weight percentage, 45% to 60% asphalt, 10% to 25% softening oil, 7% to 12% modifier, 1% to 5% interface agent, 3% to 6% asphalt additive, and 10% to 30% filler.

[0052] For example, the asphalt in the asphalt coating of the upper and lower asphalt coating layers can be the same as the asphalt component in the non-cured asphalt, and its proportion can be 45%, 48%, 50%, 52%, 55%, 58%, 60% or any two of the above values.

[0053] When the softening oil is selected from at least one of the following: non-linear oil, aromatic oil, and alkane oil, its proportion can be 10%, 12%, 15%, 18%, 20%, 22%, 25%, or any two of the above values.

[0054] When the modifier includes styrene-butadiene rubber, its proportion can be 7%, 8%, 9%, 10%, 11%, 12%, or any two of the above values.

[0055] When the interface agent is a polyphosphoric acid modified silane coupling agent, the proportion can be 1%, 2%, 3%, 4%, 5%, or any two of the above values.

[0056] When the asphalt additive is flame-retardant nano-montmorillonite, the proportion can be 3%, 4%, 5%, 6%, or any two of the above values.

[0057] When the filler is at least one of fly ash, desulfurization ash, denitrification ash, and floating black ash, the proportion can be 10%, 15%, 20%, 25%, 30%, or any two of the above values.

[0058] In this application, by synergistically adjusting the proportions of asphalt, softening oil, modifier, interface agent, asphalt additive, and filler, a continuous and stable system structure is formed in the asphalt coating during molding and construction. Specifically, asphalt, as the base continuous phase, provides a dispersion basis for each functional component; softening oil can adjust the flexibility and flow state of the system during construction, enabling the coating to form a more continuous coating interface during spreading; modifier can improve the system's deformation adaptability under stress conditions; interface agent can improve the interfacial bonding state between the coating and adjacent structural layers, maintaining good continuity of the interlayer structure; asphalt additive can regulate the structural stability of the system under heating conditions, thereby reducing the occurrence of flow or deformation at high temperatures; filler can fill and homogenize the internal structure of the system, making the distribution of each component in the system more uniform, thereby maintaining the overall structural stability and consistency of the roll material in use.

[0059] According to an embodiment of this application, the preparation method of asphalt coating material includes: heating asphalt to 160~170℃, adding softening oil, modifier, filler, interface agent, and asphalt additive, and stirring evenly to obtain asphalt coating material.

[0060] According to embodiments of this application, the upper and lower protective layers are each independently selected from at least one of polyethylene, polypropylene, and polyethylene terephthalate; the intermediate reinforcing layer is selected from at least one of polyester cloth, fiberglass cloth, polyethylene film, and polypropylene film. The upper and lower protective layers provide external isolation and protection for the upper and lower surfaces of the membrane, maintaining the integrity of the layered structure during transportation and construction, and reducing the direct impact of the external environment on the internal functional layers. The intermediate reinforcing layer provides support and reinforcement for the overall structure of the membrane, maintaining its overall stability under stress and during installation, and improving the structural continuity of the membrane during construction. The combination of protective and reinforcing layers of different materials ensures both external protective capabilities and internal structural support performance, thereby helping to maintain the overall structural stability and integrity of the membrane during use. This application also provides the application of self-healing exposed hot-adhesive modified bitumen waterproof membrane in building waterproofing construction. Self-healing exposed heat-adhesive modified bitumen waterproof membrane can be directly applied to building waterproofing construction, including roof waterproofing, basement waterproofing, bridge waterproofing, and other engineering sites requiring waterproof sealing.

[0061] According to another embodiment of this application, a method for preparing a self-healing, non-curing modified bitumen waterproof membrane is provided, comprising the following steps S10 to S50.

[0062] In step S10, asphalt coating material is applied to the upper and lower surfaces of the intermediate reinforcement layer to form an upper asphalt coating material layer and a lower asphalt coating material layer.

[0063] In step S20, a protective layer is applied to the surface of the upper asphalt coating layer and the material is cooled for the first time to obtain a composite structure layer with an upper protective layer.

[0064] In step S30, a non-curing modified asphalt layer is coated on the surface of the lower asphalt coating layer to form an adaptive functional coating layer in the lower part.

[0065] In step S40, a protective layer is applied to the surface of the non-cured modified asphalt layer, and a second cooling is performed to obtain a layered composite roll structure.

[0066] In step S50, the structure obtained in step S40 is sequentially pulled, stored, rolled up, cut and packaged to obtain a self-healing non-curing modified bitumen waterproof membrane.

[0067] In this application, by coating the upper and lower surfaces of the intermediate reinforcing layer with asphalt coating material, a continuous coating structure can be formed on both sides of the reinforcing layer, giving the membrane a stable interlayer bonding foundation. By covering the upper asphalt coating layer with an upper protective layer and subjecting it to a first cooling, a stable structural bond can be formed between the upper protective layer and the coating layer, thereby maintaining the integrity of the upper structure of the membrane. By coating the lower asphalt coating layer with a non-curing modified asphalt layer, a functional layer with a certain degree of adaptability can be formed in the lower part of the membrane, thereby improving the continuity of the interface adhesion with the base layer during construction and laying. By covering the non-curing modified asphalt layer with a lower protective layer and subjecting it to a second cooling, a stable bond can be formed between the lower protective layer and the functional layer, thereby improving the overall structural stability of the membrane and providing isolation and protection. Through processes such as traction, storage, winding, cutting, and packaging, the formed membrane can maintain the integrity of its layered structure and its workability, thereby meeting the requirements for use of waterproof membranes.

[0068] According to another embodiment of this application, a self-healing, non-curing modified bitumen waterproof membrane is provided for use in building waterproofing construction. After the waterproof membrane is laid on the surface of the building substrate, the membrane can adapt to local unevenness of the substrate to a certain extent through the interfacial contact between the non-curing modified bitumen layer and the substrate, thereby forming a continuous and bonded waterproof interface structure and maintaining the overall structural continuity and construction adaptability of the waterproof layer.

[0069] 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.

[0070] Example 1

[0071] This embodiment provides a microcapsule self-healing agent a, which, by weight percentage (100%), comprises: 45% sodium bentonite, 30% paraffin wax, 12% epoxy resin, 12% DICY (curing agent), and 1% 2-methylimidazole (accelerator).

[0072] The preparation method of microcapsule self-repair agent a in Example 1 of this invention is as follows:

[0073] (1) Add 45% sodium bentonite and 30% paraffin to the heating conditions and melt mix them to form a uniform mixture system.

[0074] (2) Add 12% epoxy resin, 12% DICY and 1% 2-methylimidazole to the mixture under continuous stirring to make the reaction components uniformly dispersed in the system.

[0075] (3) After cooling, the system is solidified and then filtered, washed and dried to obtain microcapsule self-healing agent a.

[0076] Example 2

[0077] This embodiment provides a microcapsule self-healing agent b, which is prepared in the same way as in Example 1, except that, based on a mass percentage of 100%, it includes: 48% sodium bentonite, 20% paraffin, 15% epoxy resin, 15% DICY and 2% 2-methylimidazole.

[0078] Example 3

[0079] This embodiment provides a non-curing modified asphalt a, which, by weight percentage (100%), comprises: 55% asphalt, 15% liquid tackifying resin, 5% polystyrene-isoprene copolymer, 5% isoprene-butadiene diblock copolymer, 15% fly ash, and 5% microcapsule self-healing agent a prepared in Example 1; wherein, the penetration of the asphalt (25 ℃, 5 s, 100 g) is 180 0.1 mm, and the wax content is 0.5%; the liquid tackifying resin is a liquid mixture modified from rosin resin and terpene resin, with an acid value of 10 mg KOH / g, a viscosity of 30℃ of 30000 mPa·s, and a glass transition temperature (T0). g The temperature is -30℃.

[0080] The preparation method of non-curing modified asphalt a in Example 3 of this invention is as follows:

[0081] Heat 55% asphalt to 160-170℃, add 15% liquid tackifying resin, 5% polystyrene-butadiene copolymer, 5% isoprene-butadiene block copolymer, and 15% fly ash, stir evenly, cool to 120℃ and add 5% microcapsule self-healing agent to obtain self-healing non-curing modified asphalt.

[0082] Example 4

[0083] This embodiment provides a non-curing modified asphalt b, which is prepared using the same method as in Example 3, except that, based on a 100% mass percentage, it comprises 54% asphalt, 10% liquid tackifying resin, 3% polystyrene-isoprene copolymer, 3% isoprene-butadiene-isoprene triblock copolymer, 20% floating black ash, and 8% of the microcapsule self-healing agent b prepared in Example 2. The non-curing modified asphalt b has a penetration (25 °C, 5 s, 100 g) of 2400.1 mm and a wax content of 0.4%. The liquid tackifying resin is a liquid mixture modified from rosin resin and terpene resin, with an acid value of 12 mg KOH / g, a viscosity of 50000 mPa·s at 30 °C, and a glass transition temperature (T0). g The temperature is -30℃.

[0084] Example 5

[0085] This embodiment provides an asphalt coating material a, wherein the following components are weighed according to the following proportions (based on a mass percentage of 100%): 56% asphalt, 20% linear reducing oil, 8% styrene-butadiene-styrene block copolymer (SBS) linear rubber, 2% polyphosphoric acid modified silane coupling agent, 4% flame-retardant nano-montmorillonite, and 10% denitrification ash; wherein the asphalt penetration (25 ℃, 5 s, 100 g) is 70 0.1 mm, and the wax content is 0.5%.

[0086] The preparation method of asphalt coating material a in Example 5 of this invention is as follows:

[0087] Heat 56% asphalt to 160~170℃, add 20% softening oil (reducing oil), 8% modifier (styrene-butadiene-styrene block copolymer (SBS) linear rubber), 10% filler (denitrification ash), 2% interface agent (polyphosphoric acid modified silane coupling agent), and 4% asphalt additive (flame retardant nano montmorillonite), stir evenly to obtain asphalt coating material a.

[0088] Example 6

[0089] This embodiment provides an asphalt coating material b, which is prepared in the same way as in Example 5, except that, based on a mass percentage of 100%, the following components are weighed according to the proportion: 59% asphalt, 10% alkane oil, 7% styrene-butadiene-styrene block copolymer (SBS) star-shaped rubber, 4% polyphosphoric acid modified silane coupling agent, 5% flame-retardant nano-montmorillonite, and 15% desulfurization ash; wherein, the asphalt penetration (25 ℃, 5 s, 100 g) is 70 0.1 mm, and the wax content is 0.5%.

[0090] Example 7

[0091] This embodiment provides a method for manufacturing a self-healing, non-curing modified bitumen waterproof membrane, with the following steps: Steps 1 to 5.

[0092] Step 1: Apply asphalt coating material to the upper and lower surfaces of the intermediate reinforcement layer respectively to form an upper asphalt coating material layer and a lower asphalt coating material layer;

[0093] Step 2: Apply a protective layer to the surface of the asphalt coating layer and allow it to cool for the first time;

[0094] Step 3: Apply a non-curing modified asphalt layer to the surface of the underlying asphalt coating layer;

[0095] Step 4: Apply a protective layer to the surface of the uncured modified asphalt layer and perform a second cooling process;

[0096] Step 5: After traction, storage, winding, cutting and packaging, a self-healing non-curing modified bitumen waterproof membrane is obtained.

[0097] The upper and lower protective layers are made of PE film, while the middle reinforcing layer is made of polyester fabric.

[0098] Comparative Example 1

[0099] This comparative example provides a non-curing modified asphalt c. Referring to Example 3, the difference is that, based on a mass percentage of 100%, the non-curing modified asphalt c in this example comprises 55% asphalt, 15% liquid tackifying resin, 5% polystyrene-isoprene copolymer, 5% isoprene-butadiene diblock copolymer, and 20% fly ash, thus obtaining the non-curing modified asphalt c.

[0100] The penetration of the asphalt (25 ℃, 5 s, 100 g) was 180 0.1 mm, and the wax content was 0.5%.

[0101] The liquid tackifying resin is a liquid mixture obtained by modifying rosin resin and terpene resin. Its acid value is 10 mgKOH / g, its viscosity at 30℃ is 30000 mPa·s, and its glass transition temperature (Tg) is -30℃.

[0102] Comparative Example 2

[0103] This comparative example further provides an asphalt coating material c, referring to Example 5, except that, based on a mass percentage of 100%, it weighs 56% asphalt, 20% linear reducing oil, 8% styrene-butadiene-styrene block copolymer (SBS) linear rubber, 0% interface agent, 0% additives, and 16% denitrification ash.

[0104] The bitumen penetration (25 ℃, 5 s, 100 g) was 70 0.1 mm, and the wax content was 0.5%.

[0105] The specific components and their mass fractions are shown in Table 1 below.

[0106] Table 1

[0107]

[0108] Using the self-healing non-curing modified bitumen waterproof membrane preparation method of Example 7 above, and the formulations of Examples 3, 4, 5, 6, Comparative Example 1, and Comparative Example 2, factory-prefabricated two-layer waterproof composite membrane products A to F were prepared respectively. The composition of non-curing modified bitumen and bitumen coating material in products A to F is shown in Table 1 below. At the same time, according to the structural layers provided by the national standard GB 18242-2008 "Elastomer Modified Bitumen Waterproof Membrane", product G with the same thickness and specifications as above was prepared. G is a product with the same thickness that meets the standard of GB 18242-2008 "Elastomer Modified Bitumen Waterproof Membrane".

[0109]

[0110] The physical properties of products A through G were tested for full adhesion rate, lap joint peel strength, nail water tightness, and heat resistance. Full adhesion rate was tested according to section 7.6.1 of JC / T 2428-2017 "Non-curing Rubber Asphalt Waterproof Coatings," and the full adhesion area was calculated. Lap joint peel strength was tested according to section 6.15 of GB 18242-2008 "Elastomer Modified Bitumen Waterproof Membranes." Nail water tightness was tested according to section 6.11 of JC / T 1068-2008 "Waterproof Materials for Sloping Roofs: Self-adhesive Polymer Bitumen Waterproof Substrates." Heat resistance was tested according to section 6.8 of GB 18242-2008 "Elastomer Modified Bitumen Waterproof Membranes." The relevant test results are detailed in Table 2.

[0111] Table 2

[0112]

[0113] A comparison of A, B, C, D, E, F and G shows that the full adhesion rate between the roll material and the base layer is improved after adopting the modified asphalt non-curing adhesive layer in this technical solution. This indicates that the non-curing modified asphalt layer can better adapt to the surface condition of the base layer during construction, so as to form a more continuous bonding interface between the roll material and the base layer, thereby reducing the risk of water seepage caused by local hollowness or interface discontinuity, and helping to maintain the interface stability after the roll material is laid.

[0114] By comparing A, B, C, D, F with E, G, it can be seen that after adopting the microcapsule self-healing agent formulation system in this technical solution, the water tightness of the nail rods of the roll material is improved. This indicates that the microcapsule self-healing agent can fill and compensate for local defects in the roll material when it is locally damaged or has microcracks, thereby maintaining the structural continuity of the damaged area and reducing the possibility of moisture seeping in along the damaged area.

[0115] By comparing A, B, C, D, E, G and F, it can be seen that after adopting the modified asphalt coating material in this technical solution, the heat resistance and structural stability of the roll material under heat are improved. This indicates that the modified asphalt coating material can maintain a relatively stable structural state under heat conditions, thereby reducing the occurrence of flow, deformation or interlayer structural instability of the roll material under high temperature environment.

[0116] A comparison of A, B, C, D, E, F and G shows that when microcapsule self-healing agent and modified bitumen coating are added to the roll material system, the interfacial adhesion between the roll material and the base layer, the water tightness of the nail rods, the structural recovery ability after local damage and the heat resistance are all improved. This allows the roll material to maintain good interfacial continuity, structural stability and water-proofing ability during construction and subsequent use.

[0117] The above comparison shows that adding microcapsule self-healing agents and modified bitumen coatings to the roll material system improves the interfacial adhesion between the roll material and the substrate, enabling the roll material to form a more continuous bond with the substrate during construction and laying. Simultaneously, the water tightness of the roll material's nails and its self-healing ability after localized damage are enhanced, indicating that the microcapsule self-healing agents can provide structural compensation in locally damaged areas, thereby reducing the possibility of moisture seeping in along defective areas. Furthermore, the modified bitumen coating can improve the structural stability of the roll material under heated conditions, thus reducing the occurrence of flow and deformation in high-temperature environments. Based on these synergistic structural effects, the roll material exhibits good interfacial continuity and water-resistant properties after construction.

[0118] 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 non-solidified modified asphalt, characterized in that, include: Asphalt, liquid tackifying resins, thermoplastic elastomers, fillers, and microcapsule self-healing agents; The microcapsule self-healing agent includes a wall material, a core material, and an adsorbent carrier doped in the wall material for adsorbing the core material. In the microcapsule self-healing agent, the wall material includes paraffin wax, the core material includes epoxy resin, curing agent and accelerator, and the adsorbent carrier includes at least one of sodium bentonite, calcium bentonite and diatomaceous earth.

2. The self-healing non-solidified modified asphalt of claim 1, wherein, The raw materials forming the microcapsule self-repairing agent, based on a 100% mass percentage, include: Paraffin wax 20%~30%; Hardener 10%~20%; Accelerator 1%~2%; Epoxy resin 10%~20%; Adsorption carrier 40%~55%; Preferably, the microcapsule self-healing agent is obtained by the following method: The paraffin wax and the adsorbent carrier are heated and melted together to obtain a mixed system; The curing agent, accelerator, and epoxy resin are added to the mixture, and the mixture is cooled, filtered, washed, and dried to obtain the microcapsule self-healing agent.

3. The self-healing non-solidifying modified asphalt according to any one of claims 1-2, characterized in that, Based on a mass percentage of 100%, the self-healing non-curing modified asphalt comprises: Asphalt 50%~65%; Liquid tackifying resin 10%~15%; Thermoplastic elastomers: 6%~12%; Filler content: 15%~25%; Microcapsule self-repair agent 4%~8%.

4. The self-healing non-curing modified asphalt according to claim 3, characterized in that, The asphalt is selected from at least one of 70#, 90#, 180#, and 200#. The liquid tackifying resin is selected from at least one of terpene resin, rosin glycerol ester, and petroleum resin; The thermoplastic elastomer is selected from at least one of polystyrene-isoprene copolymer, isoprene-butadiene diblock copolymer, and isoprene-butadiene-isoprene triblock copolymer; The filler is selected from at least one of fly ash, desulfurization ash, denitrification ash, and floating black ash.

5. A self-healing non-cured modified bituminous waterproofing membrane characterized in that, From top to bottom, it includes: upper protective layer, upper asphalt coating layer, intermediate reinforcement layer, lower asphalt coating layer, non-curing modified asphalt layer, and lower protective layer; The non-curing modified asphalt layer is made of the self-healing non-curing modified asphalt according to any one of claims 1-4.

6. The self-healing non-solidified modified bitumen waterproofing membrane according to claim 5, wherein, The upper asphalt coating layer and the lower asphalt coating layer are made of asphalt coating material; Based on a mass percentage of 100%, the asphalt coating material in the upper and lower asphalt coating layers comprises: Asphalt 45%–60%, softening oil 10%–25%, modifier 7%–12%, interface agent 1%–5%, asphalt additive 3%–6%, filler 10%–30%.

7. The self-healing, non-curing modified bitumen waterproof membrane according to claim 6, characterized in that: The asphalt includes at least one of 70#, 90#, 180#, and 200#. The softening oil is selected from at least one of the following: anti-corrosion oil, aromatic oil, and alkane oil. The modifier includes styrene-butadiene rubber; The interface agent is selected from polyphosphoric acid modified silane coupling agents; The asphalt additives are selected from flame-retardant nano-montmorillonite; The filler is selected from at least one of fly ash, desulfurization ash, denitrification ash, and floating black ash.

8. The self-healing, non-curing modified bitumen waterproof membrane according to claim 5, characterized in that: The materials of the upper and lower protective layers are each independently selected from at least one of polyethylene, polypropylene, and polyethylene terephthalate. The material of the intermediate reinforcing layer is selected from at least one of polyester cloth, fiberglass cloth, polyethylene film, and polypropylene film.

9. A method for preparing a self-healing, non-curing modified bitumen waterproof membrane as described in any one of claims 5-8, characterized in that, include: The asphalt coating material is applied to the upper and lower surfaces of the intermediate reinforcement layer to form an upper asphalt coating layer and a lower asphalt coating layer. A protective layer is applied to the surface of the asphalt coating layer and then subjected to a first cooling process. A non-curing modified asphalt layer is coated on the surface of the lower asphalt coating layer; A protective layer is applied to the surface of the uncured modified asphalt layer, followed by a second cooling process. After being pulled, stored, rolled, cut, and packaged, the self-healing non-curing modified bitumen waterproof membrane is obtained.

10. The application of a self-healing, non-curing modified bitumen waterproof membrane according to any one of claims 5 to 8 in building waterproofing construction.

Images