Anti-cracking pavement structure with polyester glass fabric layer

Abstract

The utility model discloses a polyester glass fiber cloth layer anti-cracking pavement structure which comprises an original pavement section and an extension pavement, an excavation line is arranged between the original pavement section and the extension pavement, and each of the original pavement section and the extension pavement comprises a lower surface layer, an upper base layer, a base layer, a subbase layer and a cushion layer which are sequentially paved from top to bottom, the extension pavement further comprises an upper surface layer, a middle surface layer and an asphalt layer which are sequentially paved from top to bottom; the asphalt layer covers the upper surfaces of the original pavement section and the extended pavement and comprises a polyester glass fiber cloth layer, a modified asphalt bonding layer coated on the lower surface of the polyester glass fiber cloth layer, and a fiber type self-repairing agent and self-repairing microcapsules which are distributed in the modified asphalt bonding layer. In the application, by arranging the polyester glass fiber cloth layer, the construction procedure of spraying tack coat on a construction site can be omitted, the construction process is simplified, the construction quality is improved, the construction progress is accelerated, and meanwhile, the polyester glass fiber cloth layer has low extensibility and high tensile strength, so that the generation of reflection cracks can be effectively delayed.

Description

Technical Field

[0001] The utility model relates to the field of road structures, in particular to a polyester glass fiber cloth layer anti-cracking road surface structure. Background Art

[0002] The main types of highway pavement structures in my country are semi-rigid base asphalt concrete surface layers. During the long-term use of asphalt pavement, under the combined effects of natural environment and vehicle loads, its structure undergoes the test of various complex environments, and some tiny cracks and local damage will inevitably occur. If these micro-damages cannot be controlled in time, these micro-cracks will expand and crack under the action of external loads, and then the convergence and growth of a large number of cracks will lead to the generation of macro cracks, which will eventually cause pavement cracking, which will affect the service life of the pavement structure, and in severe cases will damage the structure of the entire road. Utility Model Content

[0003] The main purpose of the utility model is to provide a polyester glass fiber cloth layer anti-cracking pavement structure, aiming to solve the above technical problems.

[0004] To achieve the above-mentioned purpose, the utility model proposes a polyester glass fiber cloth layer anti-cracking pavement structure, which includes a pavement body, wherein the pavement body includes an original pavement section and an expanded pavement, wherein an excavation line is provided between the original pavement section and the expanded pavement, wherein both the original pavement section and the expanded pavement include a lower layer, an upper base layer, a base layer, a subbase layer and a cushion layer laid in sequence from top to bottom, and wherein the expanded pavement also includes an upper layer, a middle layer and an asphalt layer laid in sequence from top to bottom;

[0005] The asphalt layer covers the upper surface of the original road section and the expanded road surface, and the asphalt layer includes a polyester glass fiber cloth layer, a modified asphalt bonding layer coated on the lower surface of the polyester glass fiber cloth layer, and a fiber-type self-repairing agent and self-repairing microcapsules distributed in the modified asphalt bonding layer.

[0006] In one embodiment, the fiber-type self-healing agent includes a hollow glass fiber tube with closed ends, an asphalt self-healing agent disposed in the hollow glass fiber tube, and an outer coating disposed outside the hollow glass fiber tube.

[0007] In one embodiment, the asphalt self-repairing agent includes at least one of an asphalt regeneration agent, an epoxy resin, an epoxy acrylic resin or a polyurethane resin.

[0008] In one embodiment, the polyester glass fiber cloth layer is TruPave polyester glass fiber cloth.

[0009] In one embodiment, the modified asphalt bonding layer is SBS modified asphalt.

[0010] In one embodiment, a release paper is adhered to the bottom surface of the modified asphalt bonding layer.

[0011] In one embodiment, the upper layer, middle layer, lower layer, upper base layer, base layer, subbase layer and cushion layer are respectively four centimeters modified asphalt SMA-13, six centimeters modified asphalt AC-20, eight centimeters ordinary asphalt AC-20, fourteen centimeters asphalt gravel ATB, thirty-six centimeters cement stabilized gravel, twenty centimeters cement stabilized gravel and twenty centimeters graded gravel.

[0012] In the technical solution of the utility model, the polyester glass fiber cloth layer anti-cracking pavement structure includes a pavement body, the pavement body includes an original pavement section and an expanded pavement, the original pavement section and the expanded pavement are separated by an excavation line, the original pavement section and the expanded pavement both include a lower layer, an upper base layer, a base layer, a subbase layer and a cushion layer laid in sequence from top to bottom, and the expanded pavement also includes an upper layer, a middle layer and an asphalt layer laid in sequence from top to bottom;

[0013] The asphalt layer covers the upper surface of the original road section and the expanded road surface, and the asphalt layer includes a polyester glass fiber cloth layer, a modified asphalt bonding layer coated on the lower surface of the polyester glass fiber cloth layer, and a fiber-type self-repairing agent and self-repairing microcapsules distributed in the modified asphalt bonding layer.

[0014] Therefore, in this technical solution, fiber-type self-repairing agents and self-repairing microcapsules are added to improve the self-repairing performance of asphalt concrete, so that the hollow glass fiber structure is destroyed under the action of microcrack damage, and the asphalt regeneration agent is released, thereby restoring the performance of aged asphalt in situ, and realizing the in-situ regeneration of asphalt pavement and self-repair of microcrack damage. At the same time, in the process of fiber-type self-repairing agent rupture, the capsule wall of the self-repairing microcapsule is stimulated to rupture, releasing the repair agent therein, and further causing repair behavior. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0016] Figure 1 This is a schematic structural diagram of a polyester glass fiber cloth layer anti-cracking pavement structure according to an embodiment of the utility model;

[0017] Figure 2 A schematic diagram of the structure of an asphalt layer in an embodiment of the utility model;

[0018] Figure 3 This is a schematic structural diagram of an asphalt layer according to another embodiment of the utility model.

[0019] Explanation of the accompanying figures: 1. Pavement body; 2. Expanded pavement; 3. Excavation line; 10. Lower layer; 20. Upper base layer; 30. Base layer; 40. Subbase layer; 50. Cushion layer; 60. Upper layer; 70. Middle surface layer; 80. Asphalt layer; 81. Polyester glass fiber cloth layer; 82. Modified asphalt bonding layer; 83. Fiber-type self-repairing layer; 84. Self-repairing microcapsules; 85. Geotextile layer; 86. Protective mucosa layer.

[0020] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0023] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0024] Furthermore, the technical solutions of the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0025] The utility model provides a polyester glass fiber cloth layer anti-cracking pavement structure.

[0026] like Figure 1-2As shown, the polyester glass fiber cloth layer anti-cracking pavement structure provided by the embodiment of the utility model includes an original pavement section 1 and an expanded pavement 2, and an excavation line 3 is between the original pavement section 1 and the expanded pavement 2. The original pavement section 1 and the expanded pavement 2 both include a lower layer 10, an upper base layer 20, a base layer 30, a subbase layer 40 and a cushion layer 50 laid in sequence from top to bottom, and the expanded pavement 2 also includes an upper layer 60, a middle layer 70 and an asphalt layer 80 laid in sequence from top to bottom;

[0027] The asphalt layer 80 covers the upper surface of the original road section 1 and the expanded road section 2, and the asphalt layer 80 includes a polyester glass fiber cloth layer 81, a modified asphalt bonding layer 82 coated on the lower surface of the polyester glass fiber cloth layer 81, and a fiber-type self-healing agent 83 and self-healing microcapsules 84 distributed in the modified asphalt bonding layer 82.

[0028] In this embodiment, fiber-type self-repairing agent 83 and self-repairing microcapsules 84 are added to improve the self-repairing performance of asphalt concrete, so that the hollow glass fiber structure is destroyed under the action of microcrack damage, and the asphalt regeneration agent is released, thereby in-situ restoring the performance of aged asphalt, and realizing in-situ regeneration of asphalt pavement and self-repair of microcrack damage. At the same time, during the rupture of fiber-type self-repairing agent 83, the capsule wall of self-repairing microcapsules 84 is stimulated to rupture, releasing the repair agent therein, and further causing repair behavior.

[0029] Furthermore, by limiting the expanded road surface 2 and providing the asphalt-bonded polyester glass fiber cloth layer 81, the construction process of spraying adhesive oil at the construction site can be eliminated, thereby simplifying the construction process, improving the construction quality, and accelerating the construction progress. At the same time, the asphalt-bonded polyester glass fiber cloth layer 81 has low elongation and high tensile strength, which can effectively delay the occurrence of reflective cracks, improve road driving comfort, and at the same time improve high temperature resistance and waterproof performance.

[0030] That is to say, in this application, the generation of reflective cracks is first delayed by the polyester glass fiber cloth layer 81. After a period of time, when cracks are generated, the fiber-type self-repairing agent 83 first releases the asphalt regeneration agent under the action of crack damage. At the same time, the fiber-type self-repairing agent 83 will stimulate the rupture of the capsule wall of the self-repairing microcapsule 84 during the fragmentation process, releasing the repair agent therein, and further repairing behavior. This delay and dual repair method improves the service performance and quality of asphalt concrete.

[0031] The fiber-type self-healing agent 83 includes a hollow glass fiber tube with both ends closed, an asphalt self-healing agent disposed in the hollow glass fiber tube, and an outer coating disposed outside the hollow glass fiber tube.

[0032] Among them, the asphalt self-healing agent is the commercially available ERA-C asphalt regeneration agent, and the outer coating is an outer coating formed by coating the outer surface of the hollow glass fiber tube with 3-aminopropyltriethoxysilane (KH-550 type) silane coupling agent to improve the compatibility of the fiber-type self-healing agent 83.

[0033] Of course, in other embodiments, the asphalt self-healing agent may also be epoxy resin, epoxy acrylic resin or polyurethane resin.

[0034] In the present application, the self-repairing microcapsule 84 containing the asphalt self-repairing agent can be placed in the fiber-type self-repairing hollow glass fiber tube, and the self-repairing microcapsule 84 and the asphalt self-repairing agent in the hollow glass fiber tube are different. When cracks have not yet occurred, by accommodating the self-repairing microcapsule 84 in the hollow glass fiber tube, it is possible to effectively prevent the self-repairing microcapsule 84 from being broken due to road vibration.

[0035] After a crack occurs, the hollow glass fiber tube ruptures and releases the first asphalt self-healing agent. At this time, the self-repairing microcapsule 84 flows out along with the asphalt self-healing agent in the hollow glass fiber tube. The capsule wall ruptures under the action of flow and external force, and the second asphalt self-healing agent flows out, thereby effectively ensuring that the asphalt self-healing agent inside the self-repairing microcapsule 84 can act on the crack.

[0036] The polyester glass fiber cloth layer 81 is TruPave polyester glass fiber cloth, the modified asphalt bonding layer 82 is SBS modified asphalt, and the bottom surface of the modified asphalt bonding layer 82 is pasted with release paper. After tearing off the release paper, the paving can be completed by directly pasting it at the corresponding crack position or the working surface that needs to be treated, that is, at three excavation lines, eliminating the process of spraying hot asphalt when treating cracks in the asphalt pavement, saving a lot of labor costs, making the construction safer and more efficient, and reducing the construction time limit.

[0037] In an optional embodiment, clear reference Figure 3 The upper layer of the modified asphalt bonding layer 82 is provided with a geotextile layer, and the lower layer of the modified asphalt bonding layer 82 is provided with a protective adhesive film layer to play a protective role and prevent it from being damaged during construction and transportation.

[0038] In the above embodiment, the upper layer 60, the middle layer 70, the lower layer 10, the upper base layer 20, the base layer 30, the subbase layer 40 and the cushion layer 50 are respectively four centimeters of modified asphalt SMA-13, six centimeters of modified asphalt AC-20, eight centimeters of ordinary asphalt AC-20, fourteen centimeters of asphalt gravel ATB, thirty-six centimeters of cement stabilized gravel, twenty centimeters of cement stabilized gravel and twenty centimeters of graded gravel.

[0039] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A polyester glass fiber cloth layer anti-cracking pavement structure, characterized in that: The polyester glass fiber cloth layer anti-cracking pavement structure comprises a pavement body, the pavement body comprises an original pavement section (1) and an expanded pavement (2), an excavation line (3) is between the original pavement section (1) and the expanded pavement (2), the original pavement section (1) and the expanded pavement (2) both comprise a lower layer (10), an upper base layer (20), a base layer (30), a subbase layer (40) and a cushion layer (50) laid in sequence from top to bottom, and the expanded pavement (2) further comprises an upper layer (60), a middle layer (70) and an asphalt layer (80) laid in sequence from top to bottom; The asphalt layer (80) covers the upper surface of the original road surface section (1) and the expanded road surface (2), and the asphalt layer (80) includes a polyester glass fiber cloth layer (81), a modified asphalt bonding layer (82) applied to the lower surface of the polyester glass fiber cloth layer (81), and a fiber-type self-repairing agent (83) and self-repairing microcapsules (84) distributed in the modified asphalt bonding layer (82).

2. The polyester glass fiber cloth layer anti-cracking pavement structure according to claim 1 is characterized in that: The fiber-type self-repairing agent (83) comprises a hollow glass fiber tube with closed ends, an asphalt self-repairing agent arranged in the hollow glass fiber tube, and an outer coating arranged outside the hollow glass fiber tube.

3. The polyester glass fiber cloth layer anti-cracking pavement structure according to claim 2, characterized in that: The asphalt self-repairing agent includes at least one of an asphalt regeneration agent, an epoxy resin, an epoxy acrylic resin or a polyurethane resin.

4. The polyester glass fiber cloth layer anti-cracking pavement structure according to claim 1, characterized in that: The polyester glass fiber cloth layer (81) is TruPave polyester glass fiber cloth.

5. The polyester glass fiber cloth layer anti-cracking pavement structure according to claim 1, characterized in that: The modified asphalt bonding layer (82) is SBS modified asphalt.

6. The polyester glass fiber cloth layer anti-cracking pavement structure according to claim 5, characterized in that: The bottom surface of the modified asphalt bonding layer (82) is pasted with release paper.

7. The polyester glass fiber cloth layer anti-cracking pavement structure according to any one of claims 1 to 6, characterized in that: The upper layer (60), middle layer (70), lower layer (10), upper base layer (20), base layer (30), subbase layer (40) and cushion layer (50) are respectively four centimeters of modified asphalt SMA-13, six centimeters of modified asphalt AC-20, eight centimeters of ordinary asphalt AC-20, fourteen centimeters of asphalt gravel ATB, thirty-six centimeters of cement stabilized gravel, twenty centimeters of cement stabilized gravel and twenty centimeters of graded gravel.

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