Energy-saving and emission-reducing maintenance structure for internal and external diseases of asphalt pavement

Abstract

The utility model discloses an energy-saving and emission-reducing asphalt pavement internal and external disease maintenance structure, which is characterized by comprising a micro-surfacing structure, an original asphalt pavement structure and a grouting repair material, the original asphalt pavement structure comprises an upper surface layer, a middle surface layer, a lower surface layer, a base layer and a reflection crack, the upper surface layer is positioned on the outer surface of the lower end of the micro-surfacing structure, and the lower surface layer is positioned on the outer surface of the lower end of the micro-surfacing structure; the middle surface layer is located on the outer surface of the lower end of the upper surface layer, the lower surface layer is located on the outer surface of the lower end of the middle surface layer, the base layer is located on the outer surface of the lower end of the lower surface layer, the reflection cracks are cracks which are developed upwards from cracks of the base layer to the upper surface layer, and the grouting repair material is used for filling and compacting the reflection cracks. The energy-saving and emission-reducing asphalt pavement internal and external disease maintenance structure provided by the utility model is simple in structural principle, high in disease treatment efficiency and excellent in economical efficiency, and can effectively treat the internal and external diseases of a high-grade asphalt pavement and improve the anti-skid performance of a road surface.

Description

Technical Field

[0001] This utility model relates to an asphalt pavement maintenance structure and belongs to the field of asphalt pavement maintenance technology. Background Technology

[0002] Semi-rigid base asphalt pavement is a major structural type of asphalt pavement for high-grade highways in my country. A semi-rigid base refers to a slab-like structure constructed from inorganic binder stabilized soil, which, after compaction, forms a slab structure with a certain strength. During the slab structure formation process, due to inherent material defects, semi-rigid bases have a large coefficient of thermal expansion and contraction, poor volume stability, and are prone to shrinkage cracks. Under the coupled effects of traffic loads, ambient temperature, and humidity, shrinkage cracks in semi-rigid bases easily extend to the asphalt pavement surface, forming reflective cracks. Currently, common preventative maintenance methods for cracks include crack sealing tape, crack filling, patching, and overlay. For semi-rigid base asphalt pavements, grouting repair technology is one of the effective techniques for treating cracks. Using specialized grouting equipment, a grout containing composite polyols, catalysts, foaming agents, and toughening agents is injected into the pavement cracks without damaging the pavement, thereby improving the strength of the semi-rigid base asphalt pavement.

[0003] With the continuous increase in the total mileage of highway construction, some early-built high-grade highways have begun to show defects such as cracking, rutting, potholes, and reduced skid resistance, seriously affecting driving safety and comfort. Taking Jiangsu expressways as an example, some sections of Jiangsu expressways are currently in a "cracked" state, and the road surface also has problems such as reduced skid resistance. Therefore, in addition to using grouting repair technology to treat internal defects such as reflective cracks, it is also necessary to use micro-surfacing technology to treat external defects of asphalt pavements, such as small cracks, particle loss, and potholes, in order to improve the waterproof performance, wear resistance, skid resistance, and smoothness and aesthetics of the asphalt pavement surface. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] In view of the internal and external defects that appear on Jiangsu expressways as they age, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a maintenance structure for internal and external defects of high-grade highways. Compared with milling and repaving, this maintenance structure is more convenient and economical. The internal grouting repair technology has the ability to repair reflective cracks in asphalt pavements, while the external micro-surfacing technology has the ability to repair minor surface defects. The repaired asphalt pavement is smooth and aesthetically pleasing. This internal and external asphalt pavement maintenance structure can improve the waterproof, anti-skid, and wear-resistant properties of the asphalt pavement surface, thereby improving driving safety and comfort.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: an energy-saving and emission-reducing asphalt pavement internal and external defect maintenance structure, including a micro-surfacing structure, an original asphalt pavement structure, and grouting repair material. The original asphalt pavement structure includes a top layer, a middle layer, a bottom layer, a base layer, and reflective cracks. The top layer is located on the lower outer surface of the micro-surfacing structure, the middle layer is located on the lower outer surface of the top layer, the bottom layer is located on the lower outer surface of the middle layer, and the base layer is located on the lower outer surface of the bottom layer. The reflective cracks are cracks that develop upwards from the base layer to the top layer. The grouting repair material is used to fill and compact the reflective cracks.

[0008] As a preferred embodiment of the asphalt pavement internal and external disease maintenance structure of this utility model, the micro-surfacing structure is a water-based epoxy resin modified emulsified asphalt slurry mixture, and the thickness after molding is generally 5mm to 10mm.

[0009] As a preferred embodiment of the asphalt pavement internal and external disease maintenance structure of this utility model, the upper layer is SMA-13 ​​asphalt mixture with a thickness of 4cm.

[0010] As a preferred embodiment of the asphalt pavement internal and external disease maintenance structure of this utility model, the intermediate layer is SUP-20 asphalt mixture with a thickness of 6cm.

[0011] As a preferred embodiment of the asphalt pavement internal and external disease maintenance structure of this utility model, the lower layer is SUP-25 asphalt mixture with a thickness of 8cm.

[0012] As a preferred embodiment of the asphalt pavement internal and external disease maintenance structure of this utility model, the base course is a crack-resistant water-stabilized base course with a thickness of 36cm.

[0013] As a preferred embodiment of the asphalt pavement internal and external disease maintenance structure of this utility model, the reflective cracks are treated by grouting repair technology, and the grouting repair material is used to fill the reflective cracks densely.

[0014] As a preferred embodiment of the asphalt pavement internal and external disease maintenance structure of this utility model, the grouting repair material is a polymer composite grouting material. Further, the polymer composite grouting material is composed of components A and B. Component A is mainly composed of composite polyol, catalyst, foaming agent and toughening agent, and component B is mainly a curing agent.

[0015] The beneficial effects of this utility model are as follows: The energy-saving and emission-reducing asphalt pavement internal and external disease maintenance structure provided by this utility model combines grouting repair technology and micro-surfacing technology to efficiently treat internal and external diseases of high-grade asphalt pavement, effectively solve the problems of internal reflective cracks and reduced anti-skid performance of asphalt pavement. Compared with milling and repaving maintenance, this maintenance structure is more convenient and economical. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0017] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0018] Figure 2 This is a partial enlarged view of an embodiment of the present utility model. Detailed Implementation

[0019] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0020] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0021] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth.

[0023] Reference Figure 1 and Figure 2 This invention provides an energy-saving and emission-reducing asphalt pavement internal and external defect maintenance structure, characterized by comprising a micro-surfacing structure 1, a top layer 2, a middle layer 3, a bottom layer 4, a base layer 5, reflective cracks 6, and grouting repair material 7. The top layer 2 is located on the lower outer surface of the micro-surfacing structure 1, the middle layer 3 is located on the lower outer surface of the top layer 2, the bottom layer 4 is located on the lower outer surface of the middle layer 3, the base layer 5 is located on the lower outer surface of the bottom layer 4, the reflective cracks 6 are cracks that originate in the base layer 5 and extend upwards to the top layer 2, and the grouting repair material 7 is used to fill and compact the reflective cracks 6.

[0024] Among them, the micro-surfacing structure 1 is a water-based epoxy resin modified emulsified asphalt slurry mixture, and its thickness after molding is generally 5mm to 10mm.

[0025] The upper layer 2 is an SMA-13 ​​asphalt mixture with a thickness of about 4cm.

[0026] The intermediate layer 3 is made of SUP-20 asphalt mixture with a thickness of about 6cm.

[0027] Furthermore, the lower layer 4 is a SUP-25 asphalt mixture with a thickness of approximately 8cm.

[0028] Furthermore, base layer 5 is a crack-resistant water-stabilized base layer with a thickness of approximately 36cm.

[0029] Furthermore, the grouting repair material 7 is a polymer composite grouting material, which is composed of components A and B. Component A mainly consists of composite polyol, catalyst, foam stabilizer and toughening agent, while component B is mainly a curing agent.

[0030] During the application process, step 1 involves treating reflective cracks in asphalt pavement with polymer grouting, following a procedure including positioning, drilling, hole cleaning, pre-embedding of grouting conduits, grouting, sealing, and curing. Specifically, reflective cracks appearing in the upper layer are located and drilled. A high-pressure air pump with a long nozzle is used to clean the holes. Changes in the grouting holes are monitored in real time during grouting, with grout overflow as the completion standard. The grouting holes are then plugged with special wooden plugs and removed after 7 minutes, followed by 15 minutes of curing.

[0031] Step 2: After the old pavement grouting repair is completed and the conditions for micro-surfacing construction are met, proceed with the micro-surfacing construction. The old pavement should be cleaned with a high-pressure water gun the day before micro-surfacing construction, and then treated again with high-pressure air before construction to ensure thorough removal of impurities and prevent them from affecting the adhesion between the water-based epoxy resin emulsified asphalt micro-surfacing and the old pavement.

[0032] Step 3: Divide the construction area into reasonable blocks according to the area of ​​the construction area and the paving width of the construction vehicles; use tape to cover the old road facilities such as curbs and guardrails to avoid pollution during the construction process; carry out construction according to the range of water-based epoxy resin dosage determined indoors.

[0033] Step 4: Based on the temperature, humidity, wind speed and relevant construction experience on the day of construction, traffic can be opened after the water-based epoxy resin emulsified asphalt micro-surface has formed sufficient strength.

[0034] Compared with the prior art, the present invention has the advantages of simple structure and principle, high efficiency in disease treatment and good economy.

[0035] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An energy-saving and emission-reducing asphalt pavement internal and external disease maintenance structure, characterized in that, The structure includes a micro-surfacing structure (1), an original asphalt pavement structure, and grouting repair material (7). The original asphalt pavement structure includes a top layer (2), a middle layer (3), a bottom layer (4), a base layer (5), and reflective cracks (6). The top layer (2) is located on the lower outer surface of the micro-surfacing structure (1). The middle layer (3) is located on the lower outer surface of the top layer (2). The bottom layer (4) is located on the lower outer surface of the middle layer (3). The base layer (5) is located on the lower outer surface of the bottom layer (4). The reflective cracks (6) are cracks that develop upward from the base layer (5) to the top layer (2). The grouting repair material (7) is used to fill and compact the reflective cracks (6).

2. The asphalt pavement internal and external distress maintenance structure of claim 1, wherein: The micro-surfacing structure (1) is a water-based epoxy resin modified emulsified asphalt slurry mixture with a thickness of 5mm~10mm after molding.

3. The asphalt pavement internal and external distress maintenance structure of claim 1, wherein: The upper layer (2) is SMA-13 ​​asphalt mixture with a thickness of 4cm.

4. The asphalt pavement internal and external distress maintenance structure of claim 1, wherein: The intermediate layer (3) is SUP-20 asphalt mixture with a thickness of 6cm.

5. The asphalt pavement internal and external distress maintenance structure of claim 1, wherein: The lower layer (4) is SUP-25 asphalt mixture with a thickness of 8cm.

6. The asphalt pavement internal and external distress maintenance structure of claim 1, wherein: The base layer (5) is a crack-resistant water-stabilized base layer with a thickness of 36cm.

7. The asphalt pavement internal and external distress maintenance structure of claim 1, wherein: The reflective crack (6) is treated with grouting repair technology, and the grouting repair material (7) is used to fill the reflective crack (6) densely.

8. The asphalt pavement internal and external distress maintenance structure of claim 7, wherein: The grouting repair material (7) is a polymer composite grouting material.

Images