Self-adhesive pavement local disease repair blanket and preparation process and application thereof

Abstract

The invention provides a self-adhesive pavement local disease repair blanket and a preparation process and application thereof, the repair blanket is of a rectangular sheet structure, and sequentially comprises an anti-wearing layer, a high-viscosity tough asphalt layer, a self-healing composite structure layer, an anti-crack reinforcing layer and a self-healing bonding layer from top to bottom. The self-healing composite structure layer is composed of a crack limiting induction film layer and a shape memory polyurethane strip. Through the collaborative design of introducing the anti-crack reinforcing layer and the high-viscosity and tough asphalt layer into the repairing blanket structure, the stress fluctuation transmitted by base cracks can be effectively buffered, and the stress concentration degree of the surface layer is reduced, so that the occurrence of reflection cracks is inhibited, and the structural integrity of a pavement repairing area is improved; a self-adhesive composite structure which can be used at normal temperature is adopted, traditional operation steps such as heating, mixing or sealing layer laying are not needed in the construction process, the construction process is simplified, and the maintenance time is shortened.

Description

Technical Field

[0001] The present invention relates to the technical field of road maintenance materials, and particularly relates to a self-adhesive local road disease repair blanket, a preparation process thereof and an application thereof. Background Art

[0002] With the rapid development of road traffic facilities, local diseases such as early microcracks, joint aging, and surface loosening of road structures are increasing day by day. At present, China has entered the stage of highway management dominated by maintenance, and the demand for fast, efficient and low-cost local repair materials has increased.

[0003] Traditional disease repair methods mainly include forms such as crack filling, patching, and milling and filling. These methods have problems such as cumbersome construction steps, rapid degradation of material properties, insufficient water sealing, short service life, and are prone to secondary damage. Moreover, traditional methods have high requirements for the maintenance window period, which is not conducive to all-weather road operation and maintenance;

[0004] Therefore, a self-adhesive local road disease repair blanket, a preparation process thereof and an application thereof are proposed. Summary of the Invention

[0005] In view of this, the present invention provides a self-adhesive local road disease repair blanket, a preparation process thereof and an application thereof to solve or alleviate the technical problems existing in the prior art and at least provide a beneficial choice.

[0006] The technical solution of the present invention is realized as follows: A self-adhesive local road disease repair blanket, the repair blanket is a rectangular sheet structure, and successively includes the following structural layers from top to bottom:

[0007] An anti-abrasion layer, located on the uppermost surface, is composed of a polymer material embedded with diamond abrasive particles with a particle size of 0.3 - 1.5 mm, and the surface layer is a coarse particle embedding structure;

[0008] A high-viscosity and tough asphalt layer, arranged below the anti-abrasion layer, is an intermediate buffer layer based on a polymer-modified asphalt adhesive layer, forming a continuous thickness fitting matrix;

[0009] A self-healing composite structure layer, arranged between the high-viscosity and tough asphalt layer and the crack resistance enhancement layer, is composed of a crack-limiting induction film layer and a shape memory polyurethane strip. The crack-limiting induction film layer is a high-friction flexible film material containing micro-particle reinforcement, which is used to guide or block the crack propagation path. The shape memory polyurethane material is distributed in a strip shape and is arranged along the main crack direction;

[0010] A crack resistance enhancement layer, located below the high-viscosity and tough asphalt layer, is made of fiberglass cloth, aramid mesh or polyester non-woven fabric;

[0011] A self-healing adhesive layer, as the lowest layer, is made of a polymer elastic adhesive material and can be adhered to the road surface without heating in an environment of 5°C to 50°C;

[0012] Among them, the thickness of each structural layer is controlled within the range of 1 - 5 mm, and the overall thickness does not exceed 15 mm. When constructed, the repair blanket is unfolded and covered on the damaged part, closely following the shape of the road surface and can be cut as required.

[0013] Further preferably, the crack-resistant reinforcement layer is an alkali-resistant treated fiberglass cloth with a unit area mass of 90 - 150 g / m 2 , the weft elongation rate is less than 1.5%, the fabric structure is a cross-shaped woven pattern, and the fiberglass cloth is bonded to the adjacent upper and lower structural layers by hot pressing, with no voids between layers, and the bonding interface is a continuous planar contact.

[0014] Further preferably, the self-healing adhesive layer is an elastic hot melt adhesive based on butyl rubber or styrene-ethylene-butene-styrene block copolymer, with a thickness of 1 - 2 mm, a normal temperature peel strength of 60 - 150 N / 100 mm, a glass transition temperature lower than -20 °C, and the adhesive layer is a continuous planar adhesive layer without intervals or dot structures.

[0015] Further preferably, the high-viscosity and tough asphalt layer is a composite of SBS modified asphalt matrix, less than 10% plasticizer, and less than 1% antioxidant, with a softening point not lower than 95 °C, a low-temperature ductility that meets no cracks at -25 °C, a thickness of 2 - 3 mm, and is directly hot-pressed and bonded to the crack-resistant reinforcement layer and the anti-wear layer without an intermediate bonding layer.

[0016] Further preferably, the length of the repair blanket is 0.5 m - 5 m, the width is 0.2 m - 1 m, the shape of the repair blanket is rectangular, the four corners are right angles, and there is a chamfered belt with a width of 2 mm - 5 mm at the edges. When the repair blanket is coiled and packaged, the minimum coiling radius is not less than 10 cm, and the repair blanket as a whole does not have a rigid skeleton or a preformed structure.

[0017] Further preferably, the crack-limiting induction film layer in the self-healing composite structure layer is a polymer flexible film material with a thickness of 0.2 - 0.6 mm, and high friction resistance particles with a particle size of 20 - 80 μm are evenly distributed on the surface of the film material;

[0018] The shape memory polyurethane strip has a thickness of 0.3 - 1.0 mm, a width of 3 - 10 mm, and is arranged periodically along the transverse direction of the repair blanket at intervals of 20 - 100 mm. The shape memory polyurethane strip undergoes a directional rebound deformation when the temperature reaches the range of 30 - 50 °C.

[0019] The present invention also provides a preparation process for a self-adhesive pavement local damage repair blanket, including the following preparation steps:

[0020] Step S1: Lay the self-healing adhesive layer material on the anti-adhesive substrate film and form a continuous and uniform adhesive layer by a coating process;

[0021] Step S2: Superpose an anti-cracking reinforcement layer, a highly viscous and ductile asphalt layer, and a self-healing composite structure layer located between the two on the self-healing adhesive layer in sequence. The self-healing composite structure layer is composed of a crack-limiting induction film and shape memory polyurethane strips. Among them, the crack-limiting induction film is laid in a planar manner, and the shape memory polyurethane strips are evenly arranged on the film layer at intervals of 20 - 100 mm;

[0022] Subsequently, use a hot pressing and compounding process to integrally press the above laminated structure. The hot pressing temperature is controlled at 120°C - 160°C, the pressure is controlled at 0.3 - 0.6 MPa, and the pressing time is not less than 10 s;

[0023] Step S3: Uniformly sprinkle emery on the surface of the hot asphalt layer through a multi-head rotating spraying device, and use a roller pressing type hot pressing equipment for embedding. The embedding depth of emery during hot pressing is 1 / 2 - 2 / 3 of its particle height. Subsequently, use an aerosol spraying method to form an anti-abrasion layer with a thickness of 0.2 - 0.5 mm;

[0024] Step S4: Cool and shape the composite layer material, and use a cold air channel to reduce the temperature to below 40°C;

[0025] Step S5: Cut the shaped composite material into a rectangular sheet structure with a preset size, and cover it with a film and roll it up for sealed packaging.

[0026] Further preferably, the anti-cracking reinforcement layer in step S2 is pre-tensioned and laid, the tension force is 10 - 30 N / m, the laying speed is 0.5 - 2 m / min, and the highly viscous and ductile asphalt layer is continuously pressed through a double-roll hot press. The diameter of the press rolls is 200 - 400 mm, and the temperature difference between the roll surfaces is controlled to be no more than 5°C. A composite layer material is formed through continuous pressing.

[0027] Further preferably, the emery is spread by a multi-nozzle steering spraying system, the spreading amount is 0.8 - 1.5 kg / m2, and a synchronously controlled roller pressing device is used to make the particle embedding thickness 1 / 2 - 2 / 3 of its particle diameter.

[0028] The present invention also provides an application of a self-adhesive pavement local disease repair blanket, including the following construction steps:

[0029] Step A1: Clean the surface of the pavement disease area to be treated, remove floating dust, moisture and loose particles, and the cleaning range extends outwards by no less than 10 cm from the disease edge;

[0030] Step A2: Unroll and lay the repair blanket flat on the target area, and lay it in alignment with the rectangular edge of the repair blanket and the crack or damage area;

[0031] Step A3: Use a hand roller or a mechanical compaction device to apply pressure in the longitudinal and transverse directions along the surface of the repair blanket, so that each structural layer of the repair blanket fits with the surface of the base layer. The compaction pressure is controlled at 0.2 to 0.4 MPa, and the number of compaction passes is not less than 2 times.

[0032] Step A4: After the laying is completed, cut the extended part according to the edge contour of the blanket body to form an appearance contour that is basically flush with the original road surface.

[0033] Due to the adoption of the above technical solutions in the embodiments of the present invention, it has the following advantages:

[0034] First, through the collaborative design of introducing a crack-resistant reinforcement layer and a highly viscous and ductile asphalt layer in the structure of the repair blanket, the present invention can effectively buffer the stress fluctuations transmitted by the base cracks, reduce the degree of stress concentration on the surface layer, thereby inhibiting the occurrence of reflective cracks and improving the structural integrity of the road surface repair area; adopting a self-adhesive composite structure that can be used at normal temperature, traditional operation steps such as heating, mixing, or laying a seal layer are not required during the construction process, simplifying the construction process and shortening the maintenance time.

[0035] Second, the present invention forms a continuous and dense bonding interface between the polymer-modified asphalt layer and the elastic hot-melt adhesive bonding layer, which has good sealing performance and can effectively block the infiltration of rainwater, surface water, etc. into the roadbed, delaying the further development of diseases; the whole repair blanket adopts a multi-layer composite structure, and the anti-wear layer and the reinforcement layer work together, having excellent anti-aging performance, anti-wear performance, and structural flexibility, and the material properties are stable.

[0036] The above summary is only for the purpose of the specification and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will be readily apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0038] Figure 1 It is a process flow chart for the preparation of the repair blanket of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0039] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present invention. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0040] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0041] Embodiment 1

[0042] As Figure 1 shown, the embodiment of the present invention provides a self-adhesive repair blanket for normal-temperature construction, and its structure includes:

[0043] Abrasion-resistant layer: Using a polyethylene-vinyl acetate copolymer sheet with a thickness of 1.0 mm as the base, silicon carbide with a particle size of 0.5 mm is evenly spread on the surface of the sheet at a density of 1.0 kg / m2, and is pressed and embedded on the surface layer by a hot press roller to form a rough grinding surface;

[0044] High-viscosity and tough asphalt layer: Using SBS modified asphalt as the main material, compounding and adding 5% mineral plasticizer and 0.5% antioxidant to form an elastic buffer layer with a thickness of 2.5 mm, and hot pressing and compounding it to the lower layer through a double-roll hot press;

[0045] Self-healing composite structure layer: It is arranged between the high-viscosity and tough asphalt layer and the crack-resistant reinforcement layer, and consists of the following two parts:

[0046] Crack-limiting induction film layer: It is a polymer flexible film with a thickness of 0.4 mm, and friction particles with a particle size of 50 μm are evenly arranged on the film surface, which is used to guide the crack propagation path inside the structure and limit its propagation speed;

[0047] Shape memory polyurethane strip: The strip has a thickness of 0.5 mm and a width of 5 mm, and is arranged periodically along the transverse direction of the repair blanket at a spacing of 50 mm. When the environmental temperature reaches above 35°C, it undergoes shape recovery deformation, driving the upper structure to close the interface cracks;

[0048] Crack-resistant reinforcement layer: Select alkali-resistant fiberglass cloth with a unit area mass of 120 g / m 2 , the fabric density is 10×10 roots / cm 2 , and the weft elongation rate is controlled within 1.3%. This layer is laid at a speed of 1 m / min under the condition of applying a tension of 20 N / m.

[0049] Self-healing adhesive layer: It is composed of SEBS-based elastic hot melt adhesive, with a thickness of 1.5 mm and a normal-temperature peel strength of 90 N / 100 mm. It is continuously coated on the PET release film by a coater with a width of 200 mm;

[0050] The preparation process of the repair blanket in this embodiment is as follows:

[0051] Step S1: Select a PET non-stick bottom film, and use a roller coating device to coat SEBS hot melt adhesive on its surface at a temperature of 130°C with a coating thickness of 1.5 mm to form a preliminary bonding layer;

[0052] Step S2: Before the coating layer cools, lay a fiberglass cloth in a tensioned state, and stack an SBS modified asphalt layer with a thickness of 2.5 mm. At the same time, insert a self-healing composite structure layer between the two layers; The crack-limiting induction film is laid in a full-width manner, and the shape memory polyurethane strips are arranged horizontally at intervals of 50 mm above the crack-limiting film;

[0053] Step S3: Continuously hot press through a double-roll hot press at a temperature of 140°C and a pressure of 0.4 MPa for 15 seconds to form a multi-layer composite structure;

[0054] Step S4: Sprinkle diamond sand with a particle size of 0.5 mm on the surface of the hot asphalt layer, with a spreading amount of 1.0 kg / m 2 , and use a hot roller to secondarily embed and press so that the particle embedding depth is 2 / 3 of the particle size, and then spray an EVA transparent protective film with a thickness of 0.3 mm;

[0055] Step S5: Send the overall structure into an air-cooled tunnel to cool it below 40°C, cut it into a standard size of 1000 mm × 500 mm, and finally perform film covering, winding, and vacuum packaging.

[0056] Example 2

[0057] An enhanced cold-resistant self-adhesive disease repair blanket, the structure of which includes:

[0058] Abrasion-resistant layer: Using a modified polypropylene plate as the base, with a thickness of 1.2 mm, evenly embed diamond sand particles with a particle size of 1.2 mm on the surface, with a spreading amount of 1.3 kg / m 2 , and press it into a depth of 2 / 3 of the particle height to form a rough sand-embedded interface, with good anti-slip performance and abrasion-resistant ability, suitable for the use conditions of high-wear cold-region road surfaces;

[0059] High-viscosity and tough asphalt layer: It is a high-temperature type SBS modified asphalt adhesive layer, adding 8% plasticizer and 0.8% antioxidant, with a softening point of not less than 100°C, no cracks through the -30°C low-temperature bending test, and the thickness is controlled at 3.0 mm, and it is compounded to the lower-layer structure through a hot pressing device with a pressure of 0.6 MPa;

[0060] Self-healing composite structure layer: Set between the high-viscosity and tough asphalt layer and the crack-resistant reinforcement layer, and consists of the following two parts:

[0061] Crack-limiting induced film layer: A polymer flexible film material with a thickness of 0.5 mm is used, and friction particles with a particle size of 60 μm are evenly distributed on the film surface, which is used to induce or disrupt the crack propagation path and play a composite function of "crack-limiting + energy consumption";

[0062] Shape memory polyurethane strip: The strip has a thickness of 0.5 mm and a width of 5 mm, and is periodically arranged along the transverse direction of the repair blanket at intervals of 40 mm. It can actively rebound and shrink when the ambient temperature reaches 30 - 50 °C, driving the upper structure to close the crack gap;

[0063] Crack-resistant reinforcement layer: Aramid non-woven fabric with a unit area mass of 150 g / m 2 and a thickness of 0.4 mm is used. The structure adopts an asymmetric porous distribution method to form high-energy absorption and crack suppression capabilities. The laying tension is controlled at 25 N / m, and the laying speed is 0.7 m / min;

[0064] Self-healing adhesive layer: Butyl rubber-based hot melt adhesive is selected, with a thickness of 2.0 mm, a normal temperature peel strength of 120 N / 100 mm, and a glass transition temperature of -25 °C. It is suitable for construction in low-temperature environments in winter, and the bonding performance is stable

[0065] The preparation process of this repair blanket includes the following steps:

[0066] Step S1: Using a high-temperature resistant anti-adhesive film as the base, the butyl rubber hot melt adhesive is evenly scraped on its surface at a temperature of 120 °C by a flat knife scraping method, and the coating thickness is controlled at 2.0 mm to form a self-healing adhesive layer;

[0067] Step S2: On the surface of the hot adhesive layer, a crack-resistant reinforcement layer, a crack-limiting induced film layer, a shape memory polyurethane strip (periodically arranged horizontally at intervals of 40 mm), and an SBS asphalt adhesive layer (with a thickness of 3.0 mm) are successively laid, and pre-compounding is carried out by initial rolling pressure;

[0068] Step S3: Composite treatment is carried out using a double-roll hot press. The hot pressing temperature is set at 150 °C, the pressure is 0.6 MPa, and the pressing time is 15 seconds to form a five-layer integrated composite structure;

[0069] Step S4: Emery with a particle size of 1.0 - 1.2 mm is scattered on the surface of the hot asphalt layer, the scattering density is 1.3 kg / m2, and the hot pressing roller is used to gently press and embed the particles again. At the same time, a protective resin coating with a thickness of 0.5 mm is sprayed;

[0070] Step S5: The composite structure is sent into an air-cooling channel to cool to below 35 °C, and then cut into sheets with standard dimensions of 1500 mm × 300 mm by a numerically controlled automatic cutting device. Finally, it is covered with a film and rolled and sealed for packaging as a finished product.

[0071] Example 3

[0072] A lightweight and portable self-adhesive repair blanket, whose four layers are arranged as follows:

[0073] Wear-resistant layer: Using a polyester-based composite film with a thickness of 0.8 mm as the matrix, fine-grained diamond abrasives with a particle size of 0.3 - 0.6 mm are embedded on the surface, and the spreading density is 0.8 kg / m 2 , and a homogeneous rough surface is formed by high-frequency hot pressing, while ensuring lightness and anti-slip performance;

[0074] High-viscosity and ductile asphalt layer: Made of SBS-modified flexible asphalt material with a thickness of 2.0 mm, no plasticizer is added, and the softening point is 95 °C. This layer is bonded to the lower-layer structure by continuous hot pressing at a pressure of 0.3 MPa to prevent hot melt displacement;

[0075] Self-healing composite structure layer: Embedded between the high-viscosity and ductile asphalt layer and the crack-resistant reinforcement layer, including:

[0076] Crack-limiting induction film layer: Using a flexible polymer film with a thickness of 0.3 mm, high-friction particles with a particle size of 40 μm are evenly distributed on the surface;

[0077] Shape memory polyurethane tape: With a thickness of 0.4 mm and a width of 4 mm, arranged horizontally at a spacing of 40 mm in a periodic pattern, it can rebound when the temperature reaches 30 - 50 °C during construction or operation, driving the interface to close fine cracks;

[0078] Crack-resistant reinforcement layer: Using polyester non-woven fabric with a unit area mass of 90 g / m9, the tension is 15 N / m, and the fabric thickness uniformity is controlled within the range of ±5%, ensuring the overall flexible fitting effect;

[0079] Self-healing adhesive layer: Using SEBS block copolymer-based hot melt adhesive, with a thickness of 1.2 mm, the peel strength is about 80 N / 100 mm, and the glass transition temperature is lower than -20 °C, suitable for quick manual pasting;

[0080] The repair blanket of this embodiment is prepared through the following process flow:

[0081] Step S1: Select a transparent polyethylene anti-adhesive film, spray 1.2 mm thick SEBS hot melt adhesive through a micro-precision coating equipment, and set the coating temperature to 110 °C;

[0082] Step S2: Lay polyester non-woven fabric, crack-limiting induction film layer and shape memory polyurethane tape with a spacing of 40 mm in sequence, lay a prefabricated SBS asphalt layer with a thickness of 2.0 mm on it, and conduct pre-bonding between layers through a roller pressing equipment;

[0083] Step S3: Use a double-roller hot pressing equipment for pressing, the hot pressing temperature is 130 °C, the pressure is 0.3 MPa, and the pressing time is 12 seconds to form a five-layer composite structure;

[0084] Step S4: Sprinkle silicon carbide particles with a particle size of 0.3 - 0.6 mm on the hot asphalt surface using a sand sieve, with a spreading density of 0.8 kg / m 2 , and gently press and embed them into the asphalt surface layer through an embedding roller; then spray a 0.2 - mm - thick acrylic polymer protective coating as a wear - resistant surface protection;

[0085] Step S5: Feed the overall composite structure into an air - cooled tunnel for cooling. After the temperature drops below 38°C, cut it into small - sized sheets of 500 mm × 250 mm by a numerical - control cutting device, apply a film, roll it up, and seal - pack it to adapt to emergency repair and on - site rapid construction.

[0086] Application Example

[0087] A self - adhesive local pavement disease repair blanket, whose application construction process includes the following steps:

[0088] Step A1: Pretreat the target disease section of the road. The cleaning area includes the center of the crack and its outer boundary range expanding not less than 10 cm, ensuring the removal of floating dust, moisture, oil stains, and loose particles, and obtaining a clean, dry, and non - loose particle base surface;

[0089] Step A2: Take out the repair blanket and unfold it to the target area. According to the crack or damage direction, lay the repair blanket along the rectangular edge aligning with the crack, so that it covers the disease area, and it can be continuously spliced according to the crack length to ensure stable pre - laying alignment;

[0090] Step A3: Use a manual roller or a mechanical compaction device to repeatedly roll along the surface of the repair blanket in both the longitudinal and transverse directions. The number of compaction passes is not less than two, and the compaction pressure is controlled within the range of 0.2 - 0.4 MPa, so that each structural layer of the repair blanket forms full contact with the original road surface and activates the adhesion interface of the self - healing adhesive layer;

[0091] Step A4: After the construction is completed, cut off the excess extended part according to the edge of the repair area and the contour of the blanket body, so that the shape of the repair body is flush with the original road surface, forming a complete, flat, and continuous repair interface. The construction site can be opened to traffic immediately or be officially used the next day.

[0092] The self - adhesive local pavement disease repair blanket described in the present invention can be widely applied to various road structures and scenarios with different maintenance requirements, and has good versatility and adaptability. Specifically, it includes but is not limited to the following applications:

[0093] In the repair of asphalt pavement crack diseases, it is suitable for rapid covering treatment of micro-structural damages such as transverse cracks, longitudinal cracks, and crazing. Surface sealing is carried out through self-adhesive application to control water vapor penetration and crack propagation. In the "white to black" renovation project of cement pavement, it can be laid between the cement base layer and the overlying asphalt layer to prevent reflection cracks caused by thermal stress or base layer shrinkage from transferring to the surface layer;

[0094] In the bridge paving structure, the product of the present invention can be used for the surface restoration and joint protection treatment of the bridge deck paving layer to improve the water resistance and extension stability of local areas;

[0095] In the tunnel road paving project, it can be used as an anti-skid repair layer in humid and highly abrasive areas to improve the surface friction performance of the tunnel road surface in a wet and slippery environment;

[0096] In addition, it can also be applied to maintenance construction of urban arterial roads, highways, airport taxiways, etc. where there are high requirements for rapid repair time and traffic cannot be closed for a long time, and used as emergency paving materials.

[0097] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various changes or substitutions, and these should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claimed rights.

Claims

1. A self-adhesive road surface partial damage repair blanket, characterized in that, The repair blanket is a rectangular sheet structure, and successively includes the following structural layers from top to bottom: The anti-wear layer is located on the uppermost surface and is composed of a polymer material embedded with diamond abrasive particles with a particle size of 0.3 - 1.5 mm. The surface layer is a coarse particle embedded structure; The high-viscosity and tough asphalt layer is arranged below the anti-wear layer and is an intermediate buffer layer based on a polymer-modified asphalt adhesive layer, forming a continuously thickened embedded matrix; The anti-cracking and strengthening layer is located below the high-viscosity and tough asphalt layer and is made of fiberglass cloth, aramid mesh or polyester non-woven fabric; The self-healing composite structure layer is arranged between the high-viscosity and tough asphalt layer and the anti-cracking and strengthening layer and is composed of a crack-limiting induction film layer and a shape memory polyurethane strip. The crack-limiting induction film layer is a high-friction flexible film material containing micro-particle reinforcement, which is used to guide or block the crack propagation path. The shape memory polyurethane material is distributed in a strip shape and is arranged along the main crack direction; The self-healing adhesive layer is the bottom layer and is made of a polymer elastic adhesive material, which can be bonded to the road surface without heating in an environment of 5°C to 50°C; Among them, the thickness of each structural layer is controlled within the range of 1 - 5 mm, and the overall thickness does not exceed 15 mm. When the repair blanket is constructed and unfolded, it covers the damaged part, closely adheres to the shape of the road surface and can be cut as required.

2. The self-adhesive type local road surface disease repair blanket according to claim 1, wherein: The crack-resistant strengthening layer is an alkali-resistant treated fiberglass cloth with a unit area mass of 90 to 150 g / m 2 , the weft elongation rate is less than 1.5%, the fabric structure is a cross-shaped woven pattern, the fiberglass cloth is bonded to the upper and lower adjacent structural layers by a hot pressing composite method, there is no gap between layers, and the bonding interface is a continuous planar contact.

3. The self-adhesive type local road surface disease repair blanket according to claim 1, characterized in that: The self-healing adhesive layer is an elastic hot melt adhesive based on butyl rubber or styrene-ethylene-butene-styrene block copolymer, with a thickness of 1 - 2 mm, a normal temperature peel strength of 60 - 150 N / 100 mm, a glass transition temperature lower than -20°C, and the adhesive layer is a continuous planar adhesive layer without an interval or dot structure.

4. The self-adhesive type local road surface disease repair blanket according to claim 1, characterized in that: The high-viscosity and tough asphalt layer is a composite of an SBS-modified asphalt matrix, less than 10% plasticizer and less than 1% antioxidant, with a softening point not lower than 95°C, a low-temperature ductility meeting no cracks at -25°C, a thickness of 2 - 3 mm, and is directly thermally bonded to the anti-cracking and strengthening layer and the anti-wear layer without an intermediate adhesive layer.

5. The self-adhesive type local pavement disease repair blanket according to claim 1, characterized in that: The length of the repair blanket is 0.5 m - 5 m, the width is 0.2 m - 1 m, the shape of the repair blanket is rectangular, the four corners are right angles, and there is a chamfered belt with a width of 2 mm - 5 mm at the edges. When the repair blanket is curled and packaged, the minimum curling radius is not less than 10 cm, and the repair blanket does not have a rigid skeleton or a preformed structure as a whole.

6. The self-adhesive type local road surface disease repair blanket according to claim 1, characterized in that: The crack-limiting induction film layer in the self-healing composite structure layer is a polymer flexible film material with a thickness of 0.2 - 0.6 mm, and high-friction particles with a particle size of 20 - 80 μm are evenly distributed on the surface of the film material; The shape memory polyurethane strip has a thickness of 0.3 - 1.0 mm, a width of 3 - 10 mm, and is arranged periodically along the transverse direction of the repair blanket at intervals of 20 - 100 mm. The shape memory polyurethane strip undergoes directional rebound deformation when the temperature reaches the range of 30 - 50°C.

7. The preparation process of a self-adhesive road surface partial disease repair blanket according to any one of claims 1 to 6, characterized in that, It includes the following preparation steps: Step S1: Lay the self-healing adhesive layer material on the anti-stick substrate film and form a continuous and uniform adhesive layer by a coating process; Step S2: Superimpose an anti-cracking reinforcement layer, a highly viscous and tough asphalt layer, and a self-healing composite structure layer located between the two on the self-healing bonding layer in sequence. The self-healing composite structure layer is composed of a crack-limiting induction film and shape memory polyurethane strips. The crack-limiting induction film is laid in a planar manner, and the shape memory polyurethane strips are uniformly arranged on the film layer at a spacing of 20 - 100 mm; Subsequently, use a hot pressing and compounding process to integrally press the above laminated structure. The hot pressing temperature is controlled at 120°C - 160°C, the pressure is controlled at 0.3 - 0.6 MPa, and the pressing time is not less than 10 s; Step S3: Uniformly sprinkle diamond abrasive particles on the surface of the hot asphalt layer through a multi-head rotating spraying device, and use a roller-pressing hot pressing device for embedding, and form an anti-wear layer with a thickness of 0.2 - 0.5 mm by means of aerosol spraying; Step S4: Cool and shape the composite layer material, and use a cold air channel to reduce the temperature to below 40°C; Step S5: Cut the shaped composite material into a rectangular sheet structure of a preset size, and cover it with a film and roll it up for sealed packaging.

8. The preparation process of a self-adhesive pavement partial disease repair blanket according to claim 7, characterized in that: The anti-cracking reinforcement layer in Step S2 is laid with pre-tensioning. The pre-tensioning force is 10 - 30 N / m, and the laying speed is 0.5 - 2 m / min. The highly viscous and tough asphalt layer is continuously pressed by a double-roller hot press. The diameter of the pressing roller is 200 - 400 mm, and the temperature difference between the roller surfaces is controlled to be not more than 5°C. A composite layer material is formed through continuous pressing.

9. The preparation process of a self-adhesive pavement partial disease repair blanket according to claim 7, characterized in that: The emery is spread by a multi-nozzle steering spraying system, and the spreading amount is 0.8 - 1.5 kg / m 2 , and a roller pressing device with synchronous control is used to embed the particles with a thickness of 1 / 2 - 2 / 3 of their particle size.

10. Use of a self - adhesive pavement local disease repair blanket according to any one of claims 1 to 6, characterized in that: Including the following construction steps: Step A1: Clean the surface of the road disease area to be treated, remove floating dust, moisture and loose particles, and the cleaning range extends outward by not less than 10 cm from the disease edge; Step A2: Unroll and lay the repair blanket flat on the target area, and lay it in alignment with the rectangular edge of the repair blanket and the position of the crack or damage area; Step A3: Use a hand roller or a mechanical compaction device to apply pressure in the longitudinal and transverse directions along the surface of the repair blanket, so that each structural layer of the repair blanket fits the surface of the base layer. The compaction pressure is controlled at 0.2 to 0.4 MPa, and the number of compaction passes is not less than 2; Step A4: After the laying is completed, cut the extended part according to the contour of the edge of the blanket body to form an appearance contour that is basically flush with the original road surface.

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